Re: [Elecraft] K3, using AM Mode RX with 250 Hz filter
Hi Keith, Thanks for the reply. I tried a bunch of different width/mode assignments just now, but got a strange rumbling noise with those configurations. Thanks for suggesting taking a picture of the original config, because my experimental settings got pretty wild! 73 Dave Hachadorian, K6LL Yuma, AZ On 4/14/2023 1:06 PM, Keith Trinity WE6R wrote: Try using the K3 Utility to re-label the .250 to a different value, like 6K, make sure it has a checkmark for AM. Or try disabling the other slots by maybe just unchecking any that have AM checkboxes. Experiment with that, you should be able to have it stay on the .250 and still be able to use WIDTH. (Take a picture of your original setup first for restoration) Keith WE6R Elecraft K3/K4 Tech __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3, using AM Mode RX with 250 Hz filter
Try using the K3 Utility to re-label the .250 to a different value, like 6K, make sure it has a checkmark for AM. Or try disabling the other slots by maybe just unchecking any that have AM checkboxes. Experiment with that, you should be able to have it stay on the .250 and still be able to use WIDTH. (Take a picture of your original setup first for restoration) Keith WE6R Elecraft K3/K4 Tech __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K3, using AM Mode RX with 250 Hz filter
For an upcoming Frequency Measurement Test, I'm trying to use a K3 in AM Mode RX-only with a 250 Hz CW Filter. My plan for the FMT is to use a GPS Disciplined Oscillator as a BFO, and by measuring the frequency of the beat tone, I will be able to accurately determine the mystery transmit frequency, without worrying about the dial calibration or drift of the K3 itself. It works fairly well with the standard 2.7 KHz filter, but, the WIDTH control only reduces the DSP bandwidth down to 1.35 KHz. 1.35 KHz is pretty wide if there is QRM near the mystery signal. I tried using the XFIL button to manually switch in the 250 Hz filter, but signals don't seem to pass through when I do that, and then when I touch SHIFT or WIDTH, the roofing filter switches back to 2.7 KHz. Is there a way to accomplish what I'm trying to do? My alternative is to set up a narrow digital filter in the tone recording software, but it is still disconcerting to hear a bunch of QRM around the mystery signal in real time. Thanks in advance. Dave Hachadorian, K6LL Yuma, AZ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 Sync AM receive freq. response
The appearance is that the filter being used for RX does not have its offset set for the center of actual measured filter band pass edges. 73, Guy K2AV On Sunday, March 22, 2015, GRANT YOUNGMAN n...@tx.rr.com wrote: One of the things I’ve observed in sync AM receive, is the difference in AF response between LSB and USB (selected by the shift control). The LSB side has significantly better bass response than the USB side. Likewise, USB has more highs and very little low end. It’s much like the response that occurs when the LSB/USB oscillator carrier frequencies are offset from their correct position relative to filter edges. Virtually anyone who has ever owned a KWM-2 or 75S-3x would understand what I’m talking about. The difference is apparent whether the sync detector is locked on a carrier or not. Wonder if anyone can comment on this (Eric?). It occurs with either the 13KHZ or 6KHz filters. Grant NQ5T __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net javascript:; This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to k2av@gmail.com javascript:; __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K3 Sync AM receive freq. response
One of the things I’ve observed in sync AM receive, is the difference in AF response between LSB and USB (selected by the shift control). The LSB side has significantly better bass response than the USB side. Likewise, USB has more highs and very little low end. It’s much like the response that occurs when the LSB/USB oscillator carrier frequencies are offset from their correct position relative to filter edges. Virtually anyone who has ever owned a KWM-2 or 75S-3x would understand what I’m talking about. The difference is apparent whether the sync detector is locked on a carrier or not. Wonder if anyone can comment on this (Eric?). It occurs with either the 13KHZ or 6KHz filters. Grant NQ5T __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 Sync AM receive freq. response
That could be. But the DSP bandwidth (10 kHz or 5 kHz in sync mode) is sitting in the middle of a 13 kHz filter. There's a lot of room for slop before the filter edges should come into play ... Grant NQ5T Sent from my iPhone On Mar 22, 2015, at 3:35 PM, Guy Olinger K2AV k2av@gmail.com wrote: The appearance is that the filter being used for RX does not have its offset set for the center of actual measured filter band pass edges. 73, Guy K2AV __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 Sync AM receive freq. response
Grant, Synchronous AM reception is rather like SSB, so the edges of the filter are significant rather than the center. For non-synch AM, the center is significant as you state. The filter slope on the low frequency side will not be the same as on the high frequency side. Even though the 13kHz filter theoretically has zero offset, you may find a better balance for the bass response by experimenting a bit with the offset value for that filter. 73, Don W3FPR On 3/22/2015 4:50 PM, Grant Youngman wrote: That could be. But the DSP bandwidth (10 kHz or 5 kHz in sync mode) is sitting in the middle of a 13 kHz filter. There's a lot of room for slop before the filter edges should come into play ... __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 Sync AM receive freq. response
Hi to the gang. I also noticed this uneven AM response on the 160 meter AM net this morning on my K3 457. 73 Ken W0CZ w0cz at i29 dot net Sent from my iPad On Mar 22, 2015, at 2:26 PM, GRANT YOUNGMAN n...@tx.rr.com wrote: One of the things I’ve observed in sync AM receive, is the difference in AF response between LSB and USB (selected by the shift control). The LSB side has significantly better bass response than the USB side. Likewise, USB has more highs and very little low end. It’s much like the response that occurs when the LSB/USB oscillator carrier frequencies are offset from their correct position relative to filter edges. Virtually anyone who has ever owned a KWM-2 or 75S-3x would understand what I’m talking about. The difference is apparent whether the sync detector is locked on a carrier or not. Wonder if anyone can comment on this (Eric?). It occurs with either the 13KHZ or 6KHz filters. Grant NQ5T __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to w...@i29.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 Sync AM receive freq. response
That's something I plan to experiment with ... but the 13 KHz filter is considerably wider than the 5 KHz DSP bandwidth in sync mode. For what it's worth, the identical effect occurs with the 6 and 2.8 KHz filters also. Grant NQ5T Sent from my iPhone On Mar 22, 2015, at 8:25 PM, Don Wilhelm w3...@embarqmail.com wrote: Grant, Synchronous AM reception is rather like SSB, so the edges of the filter are significant rather than the center. For non-synch AM, the center is significant as you state. The filter slope on the low frequency side will not be the same as on the high frequency side. Even though the 13kHz filter theoretically has zero offset, you may find a better balance for the bass response by experimenting a bit with the offset value for that filter. 73, Don W3FPR On 3/22/2015 4:50 PM, Grant Youngman wrote: That could be. But the DSP bandwidth (10 kHz or 5 kHz in sync mode) is sitting in the middle of a 13 kHz filter. There's a lot of room for slop before the filter edges should come into play ... __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 Sync AM receive freq. response
On 2015-03-22 9:25 PM, Don Wilhelm wrote: Even though the 13kHz filter theoretically has zero offset, you may find a better balance for the bass response by experimenting a bit with the offset value for that filter. The 13 KHz filter has more than adequate bandwidth for Sync (USB/LSB) AM. Even if it is off by as much as 2 KHz the bandwidth is enough to pass the full 4.5 KHz recovered bandwidth. The upper/lower edge is determined by the DSP characteristic, not the crystal filter bandwidth. Looking at an audio spectrum display with hold it's fairly clear to see there is roughly a 50 Hz difference in the lower frequency limit between LSB and USB in Sync detection while by ear there is a qualitative difference (more open) high end in USB. There is no perceptible difference when moving the FM filter offset from limit to limit. The difference persists even when forcing use of the 2.8 KHz crystal filter. It's purely an issue in the DSP function. 73, ... Joe, W4TV On 2015-03-22 9:25 PM, Don Wilhelm wrote: Grant, Synchronous AM reception is rather like SSB, so the edges of the filter are significant rather than the center. For non-synch AM, the center is significant as you state. The filter slope on the low frequency side will not be the same as on the high frequency side. 73, Don W3FPR On 3/22/2015 4:50 PM, Grant Youngman wrote: That could be. But the DSP bandwidth (10 kHz or 5 kHz in sync mode) is sitting in the middle of a 13 kHz filter. There's a lot of room for slop before the filter edges should come into play ... __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to li...@subich.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K3 in AM mode
Hi to the group! I have been slowly loading my K3 up. I concentrated on CW at first, but now I am adding other stuff. A while ago, I bought a 6 KHz AM filter. I was a little confused when I could only open the filter width up to 5.0 KHz in AM mode. I called the factory and they told me that, yes, you could only open it up to 5 KHz with the 6 KHz AM filter. They told me that if I bought the 13 KHz FM filter, then I could open the bandwidth all the way to 13 KHz. So, I just bought the FM filter and installed it. To my dismay, I still can only widen the bandwidth to 5.0 KHz in AM mode. I have AM mode checked in the mode list for the FM filter. The 6.0 KHz filter is still configured for TX on AM. Also, when increase the audio in the AM mode to more than half, the audio becomes distorted and just a little more advanced from that, the audio shuts off altogether. Any ideas are appreciated. 73 Mike WB0SND Michael Marx sndtu...@vacuumtubes.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 in AM mode
A while ago, I bought a 6 KHz AM filter. I was a little confused when I could only open the filter width up to 5.0 KHz in AM mode. A little study of the Owner's Manual will reveal that the displayed bandwidth is the audio bandwidth (High - Low). In AM, RF bandwidth is *twice* the audio bandwidth because AM is a DOUBLE SIDEBAND mode. While one can, in fact open up the DSP to 5 KHz even with the 6 KHz IF filter installed, the received bandwidth will be limited to about 3 KHz (carrier +/- 3 KHz) by the IF filter unless one selects Sync AM mode which used only one sideband (again, study the Owners Manual). So, I just bought the FM filter and installed it. To my dismay, I still can only widen the bandwidth to 5.0 KHz in AM mode. I have AM mode checked in the mode list for the FM filter. That is correct, the DSP is limited to 5 KHz (and the audio chain contains a 4.2 KHz brickwall lowpass filter in any case). The FM filter still provides 13 KHz (carrier +/- 6.5 KHZ) selectivity in the IF stages which allows the full 5 KHz maximum detection bandwidth in the DSP (demodulator). However, again AM is a *double sideband* mode - the detected audio bandwidth will always be no more than *one half* of the IF/RF bandwidth. The 6.0 KHz filter is still configured for TX on AM. Correct, transmit *audio* bandwidth is limited to 3 KHz and that requires an IF filter *at least* 6 KHz wide. Also, when increase the audio in the AM mode to more than half, What do you mean by increase audio ... to more than half? Half of what? What audio - transmit or receive? 73, ... Joe, W4TV On 9/1/2013 11:48 PM, Michael Marx wrote: Hi to the group! I have been slowly loading my K3 up. I concentrated on CW at first, but now I am adding other stuff. A while ago, I bought a 6 KHz AM filter. I was a little confused when I could only open the filter width up to 5.0 KHz in AM mode. I called the factory and they told me that, yes, you could only open it up to 5 KHz with the 6 KHz AM filter. They told me that if I bought the 13 KHz FM filter, then I could open the bandwidth all the way to 13 KHz. So, I just bought the FM filter and installed it. To my dismay, I still can only widen the bandwidth to 5.0 KHz in AM mode. I have AM mode checked in the mode list for the FM filter. The 6.0 KHz filter is still configured for TX on AM. Also, when increase the audio in the AM mode to more than half, the audio becomes distorted and just a little more advanced from that, the audio shuts off altogether. Any ideas are appreciated. 73 Mike WB0SND Michael Marx sndtu...@vacuumtubes.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3 Synchronous AM
Hi everyone. I hope this isn't redundant, but I can not find the answer to it: On the K3, several versions ago of software the synchronous AM feature tracked and locked on to the carrier frequency within at least several hundred Hz. The last several software revisions (beta) do not lock. It works well when I manually zero in on the carrier frequency. Is it me or has that locking on function been removed? 73 Ted W8IXY K3 1717 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3 on AM
I have an Elecraft K3/10 getting great reception on AM using attic dipole on 7.290 mHz. Does this mode transmit well for QRP? (I use digital modes and do not own a mic.) Thanks in advance. -- Frank KD8FIP __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 on AM
Fred, I am not certain whether your question is serious or in jest. First, an AM station on 7.290 kHz is a commercial; broadcast station, and likely has no reception capability - so why would one want to transmit in AM on that frequency with any transceiver. Yes, the K3 can transmit AM *if* the 6 kHz roofing filter is installed. As for AM QRP operation, I have my doubts - SSB is much more effective. The power for an AM station is split 4 ways - 1/2 of the power goes into the carrier (which carries no intelligence) and 1/4 of the total power goes into each of the sidebands, So if one transmits QRP at 10 watts AM, the amount of effective talk power that goes into each sideband is 2. watts. You would have a +3db advantage just by going to SSB at 5 watts PEP. If you consider the total power consumed, a SSB signal with a PEP rating of 10 watts will produce a much more copyable signal than 10 watts AM. 73, Don W3FPR On 12/5/2011 7:58 PM, Frank MacDonell wrote: I have an Elecraft K3/10 getting great reception on AM using attic dipole on 7.290 mHz. Does this mode transmit well for QRP? (I use digital modes and do not own a mic.) Thanks in advance. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 on AM
Actually, it's certainly worth trying. Not a Vik II or 500, but for goodness sake, try it out. Look also for local weekend morning round tables on 75 if you can get any kind of an antenna there. The power of the K3/10 isn't all that different from many mobile rigs in the 50s/60s, and all the better with a better antenna. As to 7290 +/-, its fine during the day before the SWCB stations take over at night, but watch for the 7290 traffic net before noon or so -- I forget what their schedule is, although 'traffic' isn't much of what they do. But 7285/7295 are close enough. Also 7160 +/- is a frequented AM spot. Call CQ -- someone may be lurking and reply even if you're not pinning the meter ... Don't let yourself be scared off. Put that thing on AM. You might be pleasantly surprised. Grant/NQ5T Sent from my iPhone On Dec 5, 2011, at 7:38 PM, Don Wilhelm w3...@embarqmail.com wrote: Fred, I am not certain whether your question is serious or in jest. First, an AM station on 7.290 kHz is a commercial; broadcast station, and likely has no reception capability - so why would one want to transmit in AM on that frequency with any transceiver. Yes, the K3 can transmit AM *if* the 6 kHz roofing filter is installed. As for AM QRP operation, I have my doubts - SSB is much more effective. The power for an AM station is split 4 ways - 1/2 of the power goes into the carrier (which carries no intelligence) and 1/4 of the total power goes into each of the sidebands, So if one transmits QRP at 10 watts AM, the amount of effective talk power that goes into each sideband is 2. watts. You would have a +3db advantage just by going to SSB at 5 watts PEP. If you consider the total power consumed, a SSB signal with a PEP rating of 10 watts will produce a much more copyable signal than 10 watts AM. 73, Don W3FPR On 12/5/2011 7:58 PM, Frank MacDonell wrote: I have an Elecraft K3/10 getting great reception on AM using attic dipole on 7.290 mHz. Does this mode transmit well for QRP? (I use digital modes and do not own a mic.) Thanks in advance. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 on AM
Now that 10 m AM is back, I have started firing up my Globe King 500 on that band/mode. AM is truly not a QRP mode. But, if you want to try, go for it. As has been pointed out, only half the power goes into the AM sidebands. The carrier is discarded, so offers no communications ROI for the power it consumes. It is not an efficient mode by any stretch. However, a well modulated AM signal, under stable band conditions sounds about 10,000 better than a sideband signal. It's a bit like driving a 1939 Ford coupe. It ain't efficient, but it's different than driving a Prius. If I'm looking for efficiency, I drive the Prius and I operate CW. If I'm looking for nostalgia, I drive the Ford coupe and operate 10 AM. Rob K6RB I have an Elecraft K3/10 getting great reception on AM using attic dipole on 7.290 mHz. Does this mode transmit well for QRP? (I use digital modes and do not own a mic.) Thanks in advance. -- Frank KD8FIP __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 on AM
7290 KHz is used for amateur AM activity. As for qrp AM, check out smallwonderlabs.com for the retro-40 that was added to the product line. Must be a fair number of hams that think QRP AM is a good thing! 73 - Mike WA8BXN ---Original Message--- From: Don Wilhelm Date: 12/5/2011 8:38:31 PM To: Frank MacDonell Cc: Elecraft Subject: Re: [Elecraft] K3 on AM Fred, I am not certain whether your question is serious or in jest. First, an AM station on 7.290 kHz is a commercial; broadcast station, And likely has no reception capability - so why would one want to Transmit in AM on that frequency with any transceiver. Yes, the K3 can transmit AM *if* the 6 kHz roofing filter is installed. As for AM QRP operation, I have my doubts - SSB is much more effective. The power for an AM station is split 4 ways - 1/2 of the power goes into The carrier (which carries no intelligence) and 1/4 of the total power Goes into each of the sidebands, So if one transmits QRP at 10 watts AM, the amount of effective talk power that goes into each sideband is 2. Watts. You would have a +3db advantage just by going to SSB at 5 Watts PEP. If you consider the total power consumed, a SSB signal with A PEP rating of 10 watts will produce a much more copyable signal than 10 watts AM. 73, Don W3FPR On 12/5/2011 7:58 PM, Frank MacDonell wrote: I have an Elecraft K3/10 getting great reception on AM using attic dipole on 7.290 mHz. Does this mode transmit well for QRP? (I use digital modes and do not own a mic.) Thanks in advance. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 on AM
Back in my college days my '47 Studebaker was equipped with a Lysco 10 meter
transmitter and the ubiquitous Gonset converter feeding my car AM radio for
receive. The antenna was an 8' whip mounted on the rear fender ('Highway
Patrol' style).
The Lysco put out perhaps 12 watts at about 80% modulation using a clamp
tube modulator. That's 2 maybe 3 watts output in each sideband. Sideband
was still fairly unusual in those days. Most 'phone Hams were still AM.
Even so, I made a lot of contacts, including working South America from
Southern California from time to time.
(Oh, do I need to point out that was in 1957 near the height of the
mega-sunspot-cycle?)
73, Ron AC7AC
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of k...@baymoon.com
Sent: Monday, December 05, 2011 6:26 PM
To: Frank MacDonell
Cc: Elecraft
Subject: Re: [Elecraft] K3 on AM
Now that 10 m AM is back, I have started firing up my Globe King 500 on
that band/mode. AM is truly not a QRP mode. But, if you want to try, go
for it. As has been pointed out, only half the power goes into the AM
sidebands. The carrier is discarded, so offers no communications ROI for
the power it consumes. It is not an efficient mode by any stretch.
However, a well modulated AM signal, under stable band conditions sounds
about 10,000 better than a sideband signal. It's a bit like driving a 1939
Ford coupe. It ain't efficient, but it's different than driving a Prius.
If I'm looking for efficiency, I drive the Prius and I operate CW. If I'm
looking for nostalgia, I drive the Ford coupe and operate 10 AM.
Rob K6RB
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[Elecraft] K3 FM/AM on10m band
10 m is wide opened. I have decided to try 10m FM and AM. 29500 in FM or AM mode radio says TX FREQ ERROR. Switching to SSB and it transmits no problem. What do I do wrong? 73, Igor UA9CDC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 FM/AM on10m band
Just a guess but you may not have the proper filter enabled for AM/FM. 2.7/2.8k will not work. 73, Bill Igor Sokolov-2 wrote: 10 m is wide opened. I have decided to try 10m FM and AM. 29500 in FM or AM mode radio says TX FREQ ERROR. Switching to SSB and it transmits no problem. What do I do wrong? 73, Igor UA9CDC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@.qth This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-H-Mode-Mixer-tp6889343p6895470.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 FM/AM on10m band
Plus CONFIG:FM MODE must be on. 73, Mike NF4L On 10/15/2011 8:37 AM, Bill W4ZV wrote: Just a guess but you may not have the proper filter enabled for AM/FM. 2.7/2.8k will not work. 73, Bill Igor Sokolov-2 wrote: 10 m is wide opened. I have decided to try 10m FM and AM. 29500 in FM or AM mode radio says TX FREQ ERROR. Switching to SSB and it transmits no problem. What do I do wrong? 73, Igor UA9CDC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@.qth This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-H-Mode-Mixer-tp6889343p6895470.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 for AM broadcast?
Another long running thread directly related to Elecraft? Jim K4JAF - Original Message - From: Wes Stewart n...@yahoo.com To: Phil Townsend phi...@mac.com Cc: elecraft@mailman.qth.net Sent: Sunday, December 12, 2010 8:28 PM Subject: Re: [Elecraft] K3 for AM broadcast? Why concern about how other people spend their money? Maybe the guy is going to do a short broadcasting gig, then give out some TZ RTTY QSOs on 20-meters and move on to 7O and give me a new one. Wes N7WS --- On Sun, 12/12/10, Mel Farrer farrerfo...@yahoo.com wrote: From: Mel Farrer farrerfo...@yahoo.com Subject: Re: [Elecraft] K3 for AM broadcast? To: R. Kevin Stover rksto...@mchsi.com, Phil Townsend phi...@mac.com Cc: elecraft@mailman.qth.net elecraft@mailman.qth.net Date: Sunday, December 12, 2010, 6:53 PM With so much information and products out there for OUR PART 15 products and all of the stuff offered on eBay for low power AM and FM, WHY would you want to modify a wonderful and dedicated amateur radio? Be Real. Mel From: R. Kevin Stover rksto...@mchsi.com To: Phil Townsend phi...@mac.com Cc: elecraft@mailman.qth.net elecraft@mailman.qth.net Sent: Sun, December 12, 2010 5:24:03 PM Subject: Re: [Elecraft] K3 for AM broadcast? -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Not even in the same neighborhood as reasonable. I'm pretty sure the boys in Aptos wouldn't want one of their products used as some sort of pirate AM station in deepest darkest Africa. On 12/12/2010 5:59 PM, Phil Townsend wrote: I have a friend in Mali that wants to set up an AM radio some were out in the boonies. No Reliable AC power etc etc third world problems import duty tax endless very red tape. So the question is Can the K3 be made to transmit in the 1600 kc freq? 25 to 50 watts. Is this even a reasonable idea? Sent from my iPad - -- R. Kevin Stover ACØH -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.10 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQEcBAEBAgAGBQJNBXWzAAoJEAu8BkU0m9MnIU0H/ij35EkRL5SNOLP85N2kPlIV 71E6GL3Fy/6RPcXACbLuTVw345gF0sWOF0OCqcRHv2MeOO/XsPEt/Ih2QJRTXdz+ PrJ3hmndWVvmd4ecmZ4jWIdtz9lqXRtzJ1HTQq/AAKPqygTgKyOZlKjZJ5ZoU3jH MGxmmKQ0Uoo4ykLUvxq0RwHToN8eBXXY2JpPSBUHSPvZyCyaBKoidi9p6SZzltFG h3L63CdG7kO5C3UiUzOPk7FLTbv4MGIDjwGer5lcG5MdU1BO96QzVoldFFVje1eI q5jzWLRF4GWczr0eYuPX5mPdc7SZMMj8n0cUvbJWJwZ2fK2dwx0yfwhxcZksVoc= =turf -END PGP SIGNATURE- __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 for AM broadcast?
I agree. After the answer about using the K3 was answered there was no reason to continue the thread. Why not take this off line, or to a reflector group that specializes in clandestine AM Broadcasting? 73, Tom Childers Radio Amateur N5GE Licensed since 1976 QCWA Member 35102 ARRL Life Member On Mon, 13 Dec 2010 07:18:49 -0600, Jim Cox jcox...@bellsouth.net wrote: Another long running thread directly related to Elecraft? Jim K4JAF [snip] __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 for AM broadcast?
Kevin: A much better solution to this need is this: http://www.ramseyelectronics.com/cgi-bin/commerce.exe?preadd=actionkey=AM25 It will put out one watt with some strategic circuit trace snips. You will need an amplifier to raise the power level to your requirement. Many companies abound (especialy in Italy) to help you get QRO for this exciter :) Stay solid state, so that when your friend is told by the officials he has bribed in the local government that the militia is coming to take him off the air, he can pack the stuff up and move to somewhere else in the jungle quickly. That's all the Clandestine Broadcast Consulting you get for free :) 73 Lu Romero - W4LT K3 # 3192 From: R. Kevin Stover rksto...@mchsi.com To: Phil Townsend phi...@mac.com Cc: elecraft@mailman.qth.net elecraft@mailman.qth.net Sent: Sun, December 12, 2010 5:24:03 PM Subject: Re: [Elecraft] K3 for AM broadcast? -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Not even in the same neighborhood as reasonable. I'm pretty sure the boys in Aptos wouldn't want one of their products used as some sort of pirate AM station in deepest darkest Africa. On 12/12/2010 5:59 PM, Phil Townsend wrote: I have a friend in Mali that wants to set up an AM radio some were out in the boonies. No Reliable AC power etc etc third world problems import duty tax endless very red tape. So the question is Can the K3 be made to transmit in the 1600 kc freq? 25 to 50 watts. Is this even a reasonable idea? Sent from my iPad - -- R. Kevin Stover __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 for AM broadcast?
Just ixquick low power am transmitter __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3 for AM broadcast?
I have a friend in Mali that wants to set up an AM radio some were out in the boonies. No Reliable AC power etc etc third world problems import duty tax endless very red tape. So the question is Can the K3 be made to transmit in the 1600 kc freq? 25 to 50 watts. Is this even a reasonable idea? Sent from my iPad On Dec 12, 2010, at 3:18 PM, ab2tc ab...@arrl.net wrote: Hi again, A little while ago I wrote the message below. I am still searching for ways to compensate for the tilt in my new 2.8kHz crystal filter. One way would be to have a way to set the RX equalizer through a serial command / macro. Is this going to happen soon? Another way would be to have the RX equalizer settings stored by mode so they could be different for USB and LSB. Is this going to happen soon? Am I really asking too much here? I spent money getting the 8 pole 2.8kHz filter hoping it would solve the tonality difference between USB and LSB, but achieved nothing. Recently there was somebody on here wishing that Elecraft would sort these filters weeding out the ones with a bad tilt. Should I order another one hoping to get one with a flatter response? AB2TC - Knut Hello all, I recently replaced the 5-pole 2.7kHz roofing filter in my K3 with the 8-pole 2.8kHz hoping to get rid of the difference in tonality between USB and LSB. But the difference is still there. These two links show the noise spectrum of the receiver in USB and LSB. http://ab2tc.getmyip.com:8000/pictures/usb.png http://ab2tc.getmyip.com:8000/pictures/lsb.png In USB there is a definite upward tilt of the passband and the opposite for LSB. This is quite audible. Is this normal and is there anything I can do about it (other than asking Elecraft to add by mode equalizer)? AB2TC - Knut -- View this message in context: http://elecraft.365791.n2.nabble.com/2-8-kHz-filter-tilt-tp5829094p5829094.html Sent from the [K3] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 for AM broadcast?
On 12/12/2010 3:59 PM, Phil Townsend wrote: I have a friend in Mali that wants to set up an AM radio some were out in the boonies. No Reliable AC power etc etc third world problems import duty tax endless very red tape. So, when do we get to the bad news? :-) So the question is Can the K3 be made to transmit in the 1600 kc freq? I don't know that, it can be made to hit MARS and EMCOMM frequencies. 25 to 50 watts. I believe on AM it is good for 25 watts ICAS. Don't know about CCS duty. Also not sure how CCS your Mali friend needs to be. Is this even a reasonable idea? U ... I can think of some better and cheaper ones, maybe starting with a 1600 KHz crystal oscillator driving a couple of loafing 807's plate modulated by another couple of 807's? I might be able to find the tubes [or 1625's] down in the tube box in the basement. 73, Fred K6DGW - Northern California Contest Club - CU in the 2011 Cal QSO Party 1-2 Oct 2011 - www.cqp.org __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 for AM broadcast?
Phil, It sounds like he wants a restored Johnson Ranger with the VFO padded down to 1600 kHz. Definitely more economical than a K3. Yes, I believe the K3 can do it, but I do not know for certain. 73, Don W3FPR On 12/12/2010 6:59 PM, Phil Townsend wrote: I have a friend in Mali that wants to set up an AM radio some were out in the boonies. No Reliable AC power etc etc third world problems import duty tax endless very red tape. So the question is Can the K3 be made to transmit in the 1600 kc freq? 25 to 50 watts. Is this even a reasonable idea? __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 for AM broadcast?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Not even in the same neighborhood as reasonable. I'm pretty sure the boys in Aptos wouldn't want one of their products used as some sort of pirate AM station in deepest darkest Africa. On 12/12/2010 5:59 PM, Phil Townsend wrote: I have a friend in Mali that wants to set up an AM radio some were out in the boonies. No Reliable AC power etc etc third world problems import duty tax endless very red tape. So the question is Can the K3 be made to transmit in the 1600 kc freq? 25 to 50 watts. Is this even a reasonable idea? Sent from my iPad - -- R. Kevin Stover ACØH -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.10 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQEcBAEBAgAGBQJNBXWzAAoJEAu8BkU0m9MnIU0H/ij35EkRL5SNOLP85N2kPlIV 71E6GL3Fy/6RPcXACbLuTVw345gF0sWOF0OCqcRHv2MeOO/XsPEt/Ih2QJRTXdz+ PrJ3hmndWVvmd4ecmZ4jWIdtz9lqXRtzJ1HTQq/AAKPqygTgKyOZlKjZJ5ZoU3jH MGxmmKQ0Uoo4ykLUvxq0RwHToN8eBXXY2JpPSBUHSPvZyCyaBKoidi9p6SZzltFG h3L63CdG7kO5C3UiUzOPk7FLTbv4MGIDjwGer5lcG5MdU1BO96QzVoldFFVje1eI q5jzWLRF4GWczr0eYuPX5mPdc7SZMMj8n0cUvbJWJwZ2fK2dwx0yfwhxcZksVoc= =turf -END PGP SIGNATURE- __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 for AM broadcast?
With so much information and products out there for OUR PART 15 products and all of the stuff offered on eBay for low power AM and FM, WHY would you want to modify a wonderful and dedicated amateur radio? Be Real. Mel From: R. Kevin Stover rksto...@mchsi.com To: Phil Townsend phi...@mac.com Cc: elecraft@mailman.qth.net elecraft@mailman.qth.net Sent: Sun, December 12, 2010 5:24:03 PM Subject: Re: [Elecraft] K3 for AM broadcast? -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Not even in the same neighborhood as reasonable. I'm pretty sure the boys in Aptos wouldn't want one of their products used as some sort of pirate AM station in deepest darkest Africa. On 12/12/2010 5:59 PM, Phil Townsend wrote: I have a friend in Mali that wants to set up an AM radio some were out in the boonies. No Reliable AC power etc etc third world problems import duty tax endless very red tape. So the question is Can the K3 be made to transmit in the 1600 kc freq? 25 to 50 watts. Is this even a reasonable idea? Sent from my iPad - -- R. Kevin Stover ACØH -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.10 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQEcBAEBAgAGBQJNBXWzAAoJEAu8BkU0m9MnIU0H/ij35EkRL5SNOLP85N2kPlIV 71E6GL3Fy/6RPcXACbLuTVw345gF0sWOF0OCqcRHv2MeOO/XsPEt/Ih2QJRTXdz+ PrJ3hmndWVvmd4ecmZ4jWIdtz9lqXRtzJ1HTQq/AAKPqygTgKyOZlKjZJ5ZoU3jH MGxmmKQ0Uoo4ykLUvxq0RwHToN8eBXXY2JpPSBUHSPvZyCyaBKoidi9p6SZzltFG h3L63CdG7kO5C3UiUzOPk7FLTbv4MGIDjwGer5lcG5MdU1BO96QzVoldFFVje1eI q5jzWLRF4GWczr0eYuPX5mPdc7SZMMj8n0cUvbJWJwZ2fK2dwx0yfwhxcZksVoc= =turf -END PGP SIGNATURE- __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 for AM broadcast?
You will need the K3BCTX board. There has been a delay in production however. N4LQ Steve - Original Message - From: Mel Farrer farrerfo...@yahoo.com To: R. Kevin Stover rksto...@mchsi.com; Phil Townsend phi...@mac.com Cc: elecraft@mailman.qth.net Sent: Sunday, December 12, 2010 8:53 PM Subject: Re: [Elecraft] K3 for AM broadcast? With so much information and products out there for OUR PART 15 products and all of the stuff offered on eBay for low power AM and FM, WHY would you want to modify a wonderful and dedicated amateur radio? Be Real. Mel From: R. Kevin Stover rksto...@mchsi.com To: Phil Townsend phi...@mac.com Cc: elecraft@mailman.qth.net elecraft@mailman.qth.net Sent: Sun, December 12, 2010 5:24:03 PM Subject: Re: [Elecraft] K3 for AM broadcast? -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Not even in the same neighborhood as reasonable. I'm pretty sure the boys in Aptos wouldn't want one of their products used as some sort of pirate AM station in deepest darkest Africa. On 12/12/2010 5:59 PM, Phil Townsend wrote: I have a friend in Mali that wants to set up an AM radio some were out in the boonies. No Reliable AC power etc etc third world problems import duty tax endless very red tape. So the question is Can the K3 be made to transmit in the 1600 kc freq? 25 to 50 watts. Is this even a reasonable idea? Sent from my iPad - -- R. Kevin Stover ACØH -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.10 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQEcBAEBAgAGBQJNBXWzAAoJEAu8BkU0m9MnIU0H/ij35EkRL5SNOLP85N2kPlIV 71E6GL3Fy/6RPcXACbLuTVw345gF0sWOF0OCqcRHv2MeOO/XsPEt/Ih2QJRTXdz+ PrJ3hmndWVvmd4ecmZ4jWIdtz9lqXRtzJ1HTQq/AAKPqygTgKyOZlKjZJ5ZoU3jH MGxmmKQ0Uoo4ykLUvxq0RwHToN8eBXXY2JpPSBUHSPvZyCyaBKoidi9p6SZzltFG h3L63CdG7kO5C3UiUzOPk7FLTbv4MGIDjwGer5lcG5MdU1BO96QzVoldFFVje1eI q5jzWLRF4GWczr0eYuPX5mPdc7SZMMj8n0cUvbJWJwZ2fK2dwx0yfwhxcZksVoc= =turf -END PGP SIGNATURE- __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 for AM broadcast?
Why concern about how other people spend their money? Maybe the guy is going to do a short broadcasting gig, then give out some TZ RTTY QSOs on 20-meters and move on to 7O and give me a new one. Wes N7WS --- On Sun, 12/12/10, Mel Farrer farrerfo...@yahoo.com wrote: From: Mel Farrer farrerfo...@yahoo.com Subject: Re: [Elecraft] K3 for AM broadcast? To: R. Kevin Stover rksto...@mchsi.com, Phil Townsend phi...@mac.com Cc: elecraft@mailman.qth.net elecraft@mailman.qth.net Date: Sunday, December 12, 2010, 6:53 PM With so much information and products out there for OUR PART 15 products and all of the stuff offered on eBay for low power AM and FM, WHY would you want to modify a wonderful and dedicated amateur radio? Be Real. Mel From: R. Kevin Stover rksto...@mchsi.com To: Phil Townsend phi...@mac.com Cc: elecraft@mailman.qth.net elecraft@mailman.qth.net Sent: Sun, December 12, 2010 5:24:03 PM Subject: Re: [Elecraft] K3 for AM broadcast? -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Not even in the same neighborhood as reasonable. I'm pretty sure the boys in Aptos wouldn't want one of their products used as some sort of pirate AM station in deepest darkest Africa. On 12/12/2010 5:59 PM, Phil Townsend wrote: I have a friend in Mali that wants to set up an AM radio some were out in the boonies. No Reliable AC power etc etc third world problems import duty tax endless very red tape. So the question is Can the K3 be made to transmit in the 1600 kc freq? 25 to 50 watts. Is this even a reasonable idea? Sent from my iPad - -- R. Kevin Stover ACØH -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.10 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQEcBAEBAgAGBQJNBXWzAAoJEAu8BkU0m9MnIU0H/ij35EkRL5SNOLP85N2kPlIV 71E6GL3Fy/6RPcXACbLuTVw345gF0sWOF0OCqcRHv2MeOO/XsPEt/Ih2QJRTXdz+ PrJ3hmndWVvmd4ecmZ4jWIdtz9lqXRtzJ1HTQq/AAKPqygTgKyOZlKjZJ5ZoU3jH MGxmmKQ0Uoo4ykLUvxq0RwHToN8eBXXY2JpPSBUHSPvZyCyaBKoidi9p6SZzltFG h3L63CdG7kO5C3UiUzOPk7FLTbv4MGIDjwGer5lcG5MdU1BO96QzVoldFFVje1eI q5jzWLRF4GWczr0eYuPX5mPdc7SZMMj8n0cUvbJWJwZ2fK2dwx0yfwhxcZksVoc= =turf -END PGP SIGNATURE- __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 for AM broadcast?
A single frequency AM transmitter is so hammer simple for anyone who knows anything about transmitters to assemble from parts (or old e-junk) it seems absurd to take something like the K3 for that job. If the person involves isn't competent to build a transmitter, he/she will never keep one operating under the primitive conditions you describe. Ron AC7AC -Original Message- Hash: SHA1 Not even in the same neighborhood as reasonable. I'm pretty sure the boys in Aptos wouldn't want one of their products used as some sort of pirate AM station in deepest darkest Africa. On 12/12/2010 5:59 PM, Phil Townsend wrote: I have a friend in Mali that wants to set up an AM radio some were out in the boonies. No Reliable AC power etc etc third world problems import duty tax endless very red tape. So the question is Can the K3 be made to transmit in the 1600 kc freq? 25 to 50 watts. Is this even a reasonable idea? Sent from my iPad - -- R. Kevin Stover ACØH __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 for AM broadcast?
Sounds like the job for a Johnson or Heathkit... like the DX100, or Viking... driving a pair of 813s... works good, last long time.. till water hits the bottles. Then it no ticky no more. --... ...-- Dale - WC7S in Wy From: r...@cobi.biz To: elecraft@mailman.qth.net Date: Sun, 12 Dec 2010 19:19:36 -0800 Subject: Re: [Elecraft] K3 for AM broadcast? A single frequency AM transmitter is so hammer simple for anyone who knows anything about transmitters to assemble from parts (or old e-junk) it seems absurd to take something like the K3 for that job. If the person involves isn't competent to build a transmitter, he/she will never keep one operating under the primitive conditions you describe. Ron AC7AC -Original Message- Hash: SHA1 Not even in the same neighborhood as reasonable. I'm pretty sure the boys in Aptos wouldn't want one of their products used as some sort of pirate AM station in deepest darkest Africa. On 12/12/2010 5:59 PM, Phil Townsend wrote: I have a friend in Mali that wants to set up an AM radio some were out in the boonies. No Reliable AC power etc etc third world problems import duty tax endless very red tape. So the question is Can the K3 be made to transmit in the 1600 kc freq? 25 to 50 watts. Is this even a reasonable idea? Sent from my iPad - -- R. Kevin Stover ACØH __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 for AM broadcast?
I agree. Single frequency removes a lot of the hassles of a TX of any sort. And, AM besides you don't have any of the hassles of filters and whatever for SSB. Is it more then an oscillator, audio amplifier, modulation transformer, and RF PA On Dec 12, 2010, at 7:19 PM, Ron D'Eau Claire wrote: A single frequency AM transmitter is so hammer simple for anyone who knows anything about transmitters to assemble from parts (or old e-junk) it seems absurd to take something like the K3 for that job. If the person involves isn't competent to build a transmitter, he/she will never keep one operating under the primitive conditions you describe. Ron AC7AC -Original Message- Hash: SHA1 Not even in the same neighborhood as reasonable. I'm pretty sure the boys in Aptos wouldn't want one of their products used as some sort of pirate AM station in deepest darkest Africa. On 12/12/2010 5:59 PM, Phil Townsend wrote: I have a friend in Mali that wants to set up an AM radio some were out in the boonies. No Reliable AC power etc etc third world problems import duty tax endless very red tape. So the question is Can the K3 be made to transmit in the 1600 kc freq? 25 to 50 watts. Is this even a reasonable idea? Sent from my iPad - -- R. Kevin Stover ACØH __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 for AM broadcast?
What makes K3 is 90% receiver and 10% transmitter (IMHO). Last time I checked, broadcast stations do not need to receive. What you need is crops duster, K3 is supersonic jet. Kind of out of proportion, so no, this is not a reasonable idea. 73, Igor, N1YX -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Phil Townsend Sent: Sunday, December 12, 2010 6:59 PM Cc: elecraft@mailman.qth.net Subject: [Elecraft] K3 for AM broadcast? I have a friend in Mali that wants to set up an AM radio some were out in the boonies. No Reliable AC power etc etc third world problems import duty tax endless very red tape. So the question is Can the K3 be made to transmit in the 1600 kc freq? 25 to 50 watts. Is this even a reasonable idea? Sent from my iPad On Dec 12, 2010, at 3:18 PM, ab2tc ab...@arrl.net wrote: Hi again, A little while ago I wrote the message below. I am still searching for ways to compensate for the tilt in my new 2.8kHz crystal filter. One way would be to have a way to set the RX equalizer through a serial command / macro. Is this going to happen soon? Another way would be to have the RX equalizer settings stored by mode so they could be different for USB and LSB. Is this going to happen soon? Am I really asking too much here? I spent money getting the 8 pole 2.8kHz filter hoping it would solve the tonality difference between USB and LSB, but achieved nothing. Recently there was somebody on here wishing that Elecraft would sort these filters weeding out the ones with a bad tilt. Should I order another one hoping to get one with a flatter response? AB2TC - Knut Hello all, I recently replaced the 5-pole 2.7kHz roofing filter in my K3 with the 8-pole 2.8kHz hoping to get rid of the difference in tonality between USB and LSB. But the difference is still there. These two links show the noise spectrum of the receiver in USB and LSB. http://ab2tc.getmyip.com:8000/pictures/usb.png http://ab2tc.getmyip.com:8000/pictures/lsb.png In USB there is a definite upward tilt of the passband and the opposite for LSB. This is quite audible. Is this normal and is there anything I can do about it (other than asking Elecraft to add by mode equalizer)? AB2TC - Knut -- View this message in context: http://elecraft.365791.n2.nabble.com/2-8-kHz-filter-tilt-tp5829094p5829094.h tml Sent from the [K3] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3: Use AM SYNC on WWV to calibrate DDS?
K1LI nekvts...@gmail.com wrote: AM-S in FW 3.97 works great. I notice that my frequency displays 15.000.024 when tuning in WWV on 15MHz and 10.000.16 on the 10MHz signal. (Happily, the displayed frequency is the same on both sidebands.) The ratio of the 15MHz/10MHz received frequencies is equal to the ratio of the 24Hz/16Hz difference between the displayed readings and the actual signal frequencies (I trust WWV!). Is there a lesson here that I can use to improve the frequency calibration of my K3? 73 -- Brian -- K1LI -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Use-AM-SYNC-on-WWV-to-calibrate-DDS-tp5074859p5074859.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3: Use AM SYNC on WWV to calibrate DDS?
If you really want to get your K3 right on target with the Ref. Cal setting, you can use a free program called Spectrogram and set up marker tones at your pitch freq. and 100Hz above your pitch freq. Set your rig on WWV and match the peaks of the tones to the markers... Once you have those centered perfectly on the markers you'll be within .05Hz. Doesn't get too much better than that. Be sure to let your rig warm up for about an hour before you make the adjustments. Date: Wed, 19 May 2010 14:45:25 -0400 From: n...@widomaker.com To: nekvts...@gmail.com; elecraft@mailman.qth.net Subject: Re: [Elecraft] K3: Use AM SYNC on WWV to calibrate DDS? K1LI nekvts...@gmail.com wrote: AM-S in FW 3.97 works great. I notice that my frequency displays 15.000.024 when tuning in WWV on 15MHz and 10.000.16 on the 10MHz signal. (Happily, the displayed frequency is the same on both sidebands.) The ratio of the 15MHz/10MHz received frequencies is equal to the ratio of the 24Hz/16Hz difference between the displayed readings and the actual signal frequencies (I trust WWV!). Is there a lesson here that I can use to improve the frequency calibration of my K3? 73 -- Brian -- K1LI -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Use-AM-SYNC-on-WWV-to-calibrate-DDS-tp5074859p5074859.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3: Use AM SYNC on WWV to calibrate DDS?
AM-S in FW 3.97 works great. I notice that my frequency displays 15.000.024 when tuning in WWV on 15MHz and 10.000.16 on the 10MHz signal. (Happily, the displayed frequency is the same on both sidebands.) The ratio of the 15MHz/10MHz received frequencies is equal to the ratio of the 24Hz/16Hz difference between the displayed readings and the actual signal frequencies (I trust WWV!). Is there a lesson here that I can use to improve the frequency calibration of my K3? 73 -- Brian -- K1LI -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Use-AM-SYNC-on-WWV-to-calibrate-DDS-tp5074859p5074859.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3: Use AM SYNC on WWV to calibrate DDS?
Brian, I would suggest you re-do the Reference Oscillator calibration - page 50 in the manual, use Method 2. 73, Don W3FPR K1LI wrote: AM-S in FW 3.97 works great. I notice that my frequency displays 15.000.024 when tuning in WWV on 15MHz and 10.000.16 on the 10MHz signal. (Happily, the displayed frequency is the same on both sidebands.) The ratio of the 15MHz/10MHz received frequencies is equal to the ratio of the 24Hz/16Hz difference between the displayed readings and the actual signal frequencies (I trust WWV!). Is there a lesson here that I can use to improve the frequency calibration of my K3? __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3: Use AM SYNC on WWV to calibrate DDS?
The method that I use to calibrate the frequency of my K3 is to use 2.5, 5, 10, and 15 MHz WWV as calibration signals and adjust CONFIG | REF CAL on cw so that the signals are as close to 600 Hz as possible as measured in multipsk's spectrum display in psk31, highlighting the WWV frequency and reading the audio frequency of the spectrum line in multipsk's RX frequency text display. Because of the way the K3 generates its signals, the calibration varies from band to band but I can easily keep the K3 within +/- 1 HZ using this method. I have settings for each of these WWV frequencies in memory on adjacent memory settings so I can check them momentarily once I've clicked MV once quickly without needing to click MV a second time. I'm a paid multipsk customer but it's a free download at the level needed to do this. Dunc, W5DC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3: Use AM SYNC on WWV to calibrate DDS?
G'day, And remember that this isn't a once and for all time operation. Components age and reference oscillators have long term drift. Method 2 is easy to do. Regards, Mike VP8NO - Original Message - From: Don Wilhelm w3...@embarqmail.com To: K1LI nekvts...@gmail.com Cc: elecraft@mailman.qth.net Sent: Wednesday, May 19, 2010 10:04 AM Subject: Re: [Elecraft] K3: Use AM SYNC on WWV to calibrate DDS? Brian, I would suggest you re-do the Reference Oscillator calibration - page 50 in the manual, use Method 2. 73, Don W3FPR K1LI wrote: AM-S in FW 3.97 works great. I notice that my frequency displays 15.000.024 when tuning in WWV on 15MHz and 10.000.16 on the 10MHz signal. (Happily, the displayed frequency is the same on both sidebands.) The ratio of the 15MHz/10MHz received frequencies is equal to the ratio of the 24Hz/16Hz difference between the displayed readings and the actual signal frequencies (I trust WWV!). Is there a lesson here that I can use to improve the frequency calibration of my K3? __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 and AM RX [explanation]
When tuning across an AM station there are clicks and cracks, seems to be on even kHz. On my radio it has been from day one. Is this normal or is my radio faulty? I use latest FW. / Jim Jim, When tuning near a very strong continuous carrier, you may hear a small AF artifact at points where the PLL divider switches. This occurs at different intervals depending on the band. On 20 meters the interval averages about 15 kHz. We minimize the effect by introducing a small amount of DSP limiting during the switching window (~10 ms). This is not avoidable with the present synth design, which was optimized for extremely low phase noise. There are two contributing factors. First, we follow the DDS with a very narrow crystal filter to dramatically clean up this signal; frequency shifts through the filter are subject to a small amount of group delay. (Other rigs using DDS use either no filtering, or very wide filtering, leaving them susceptible to DDS spurs.) Second, the VCO control bandwidth is low, improving close-in phase noise, but again causing a small re-lock delay when the PLL dividers are switched. (Most rigs use a wider VCO control bandwidth, and thus suffer from greater phase noise at small offsets that are important to ham operation, i.e. 2 kHz from the carrier.) We feel that this was the right design tradeoff, and I think most customers would agree. Dynamic range is greatly improved with a low- noise synthesizer, both on transmit and receive. 73, Wayne N6KR __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 and AM RX
So you don't have VCO relock chirps every few kHz ?? (at least I think that's what Jim experiences...) 73' Paul PD0PSB -- View this message in context: http://n2.nabble.com/K3-and-AM-RX-tp4774105p4778512.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 and AM RX
VCO relock chirps every few kHz is not normal. Best open a correspondence with k3supp...@elecraft.com. On Mon, Mar 22, 2010 at 11:48 AM, pd0psb p.s.bijp...@gmail.com wrote: So you don't have VCO relock chirps every few kHz ?? (at least I think that's what Jim experiences...) 73' Paul PD0PSB -- View this message in context: http://n2.nabble.com/K3-and-AM-RX-tp4774105p4778512.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 and AM RX
So you don't have VCO relock chirps every few kHz ?? (at least I think that's what Jim experiences...) I seem to have some faint ones on my K3 if I tune in big steps, but not in small steps. Either way if I have them they are very difficult to hear. I can hear them very easy on my Yaesu though. :-) __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 and AM RX
Jim will probably tune in big steps for AM. With more low frequency content in the audio/carriers of AM signals the VCO interval cross-over points may be more evident. 73' Paul PD0PSB -- View this message in context: http://n2.nabble.com/K3-and-AM-RX-tp4774105p4778700.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 and AM RX
When tuning for example across an AM band (like 49m band) it does not happen on all stations. Might be that it happens on some certain frequency interval but still quite frequent. I have not done experiments with different tuning steps, maybe I should. Will try it when I get back home next weekend. Jim SM2EKM - On 2010-03-22 17:03, Tom W8JI wrote: So you don't have VCO relock chirps every few kHz ?? (at least I think that's what Jim experiences...) I seem to have some faint ones on my K3 if I tune in big steps, but not in small steps. Either way if I have them they are very difficult to hear. I can hear them very easy on my Yaesu though. :-) __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 and AM RX
Can be correct Jim, If I remember correctly VCO jump intervals are larger than 5kHz SWBC raster. (have you tried reducing RX EQ band 1 ? That might make this symptom less obvious) 73' Paul PD0PSB -- View this message in context: http://n2.nabble.com/K3-and-AM-RX-tp4774105p4778829.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 and AM RX
No I have the RX EQ flat at 0, will test when I get back home. Jim On 2010-03-22 17:38, pd0psb wrote: Can be correct Jim, If I remember correctly VCO jump intervals are larger than 5kHz SWBC raster. (have you tried reducing RX EQ band 1 ? That might make this symptom less obvious) 73' Paul PD0PSB __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 and AM RX
Yes I suppose that´s what it is. Well it´s been like that from day one, think I have SNR 1594 so it´s been a while. I always been upset about it since IMO a high performance radio shouldn´t behave like this. However I just haven´t had time to look in to it further. Maybe it´s faulty after all. In any case so far I know about two units that got it and one that doesn´t, don´t know about K2AV´s unit. Jim SM2EKM On 2010-03-22 16:57, Guy Olinger K2AV wrote: VCO relock chirps every few kHz is not normal. Best open a correspondence with k3supp...@elecraft.com. On Mon, Mar 22, 2010 at 11:48 AM, pd0psbp.s.bijp...@gmail.com wrote: So you don't have VCO relock chirps every few kHz ?? (at least I think that's what Jim experiences...) 73' Paul PD0PSB -- __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 and AM RX
Hi Eric, Do you have the mod http://www.elecraft.com/K3/mods/ELECRAFT_Application_Note_KSYN3_ALC_Rev_A.pdf in your rig? I don't have the phenomena you describe in mine. I do have the above mod. I realize it was for another reason, but wonder if it corrected other stuff as well. 73, Guy. On Mon, Mar 22, 2010 at 12:54 PM, Jan Erik Holm sm2...@telia.com wrote: No I have the RX EQ flat at 0, will test when I get back home. Jim On 2010-03-22 17:38, pd0psb wrote: Can be correct Jim, If I remember correctly VCO jump intervals are larger than 5kHz SWBC raster. (have you tried reducing RX EQ band 1 ? That might make this symptom less obvious) 73' Paul PD0PSB __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3 and AM RX
When tuning across an AM station there are clicks and cracks, seems to be on even kHz. On my radio it has been from day one. Is this normal or is my radio faulty? I use latest FW. / Jim __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 and AM RX
On Sun, 21 Mar 2010 20:01:10 +0100, Jan Erik Holm sm2...@telia.com wrote: K3 #806 does not do that. When tuning across an AM station there are clicks and cracks, seems to be on even kHz. On my radio it has been from day one. Is this normal or is my radio faulty? I use latest FW. / Jim [snip] Tom, N5GE K3 #806 with SUB RX, PR6, KRC2 and K144XV K3 #1055 with PR6 and XV432 W1, 2 W2's and other small kits http://www.n5ge.com http://www.swotrc.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 on AM with AL811H amplifier
Good morning Ted,let me tell you something,since the very first day I got my K3 serial 2192 I have been using it on AM on 40M with guys who work on 7180,I use it with my AL-80B,when I key up the K3 puts out 40W and that makes 400W out of the amp and when I talk it swings up to 1KW,the TX modulation percentage its about 90 to 95% and the reports from the old timers using vintage radios is great always,some guys says look that I am using a big boat anchor AM station,in fact there was a guy who loved it so much that he was asking which company made the K3 because he wanted to have one. Without a doubt a K3 is an all mode perfect radio to own,73 AD4C For a refined ham it is compulsory to own a k3 --- On Sun, 2/21/10, amf...@aol.com amf...@aol.com wrote: From: amf...@aol.com amf...@aol.com Subject: [Elecraft] K3 on AM with AL811H amplifier To: Elecraft@mailman.qth.net Date: Sunday, February 21, 2010, 3:27 AM Just thought you'd all like to know that I have been getting GREAT AUDIO reports from running K3 #1717 on AM, into an AL811H amplifier driving the amp to about 125 watts carrier. Connecting the K3 to the amp was as simple as plugging in the relay cable and the coax. Running AM and using the sync detection on AM surpasses even my old boat anchor AM receivers. For me, the K3 is the true all purpose radio. 73 Ted W8IXY __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 on AM with AL811H amplifier
That will come out to 160W PEP on the K3 and 1600W PEP on the amp. I would not set the K3 to more then 25W (i e 100W PEP). Don´t know how much the AL80B can handle but 1600W PEP sounds to be too much. / Jim -- Hector Padron wrote: Good morning Ted,let me tell you something,since the very first day I got my K3 serial 2192 I have been using it on AM on 40M with guys who work on 7180,I use it with my AL-80B,when I key up the K3 puts out 40W and that makes 400W out of the amp and when I talk it swings up to 1KW,the TX modulation percentage its about 90 to 95% and the reports from the old timers using vintage radios is great always,some guys says look that I am using a big boat anchor AM station,in fact there was a guy who loved it so much that he was asking which company made the K3 because he wanted to have one. Without a doubt a K3 is an all mode perfect radio to own,73 AD4C For a refined ham it is compulsory to own a k3 --- On Sun, 2/21/10, amf...@aol.com amf...@aol.com wrote: From: amf...@aol.com amf...@aol.com Subject: [Elecraft] K3 on AM with AL811H amplifier To: Elecraft@mailman.qth.net Date: Sunday, February 21, 2010, 3:27 AM Just thought you'd all like to know that I have been getting GREAT AUDIO reports from running K3 #1717 on AM, into an AL811H amplifier driving the amp to about 125 watts carrier. Connecting the K3 to the amp was as simple as plugging in the relay cable and the coax. Running AM and using the sync detection on AM surpasses even my old boat anchor AM receivers. For me, the K3 is the true all purpose radio. 73 Ted W8IXY __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 on AM with AL811H amplifier
Don´t know how much the AL80B can handle but 1600W PEP sounds to be too much. The AL-80B is a single 3-500Z. It is capable of 800W peak if it is to remain clean and should not be run at more than 500 W CW. 40W carrier from the K3 and 400W carrier from the AL-80B are, in both cases, grossly out of spec. The K3 should not be run at more than 25W of carrier (28W absolute max) and the AL-80B (or any single 3-500Z) should not be pushed to more than 200W carrier (absolute maximum). 73, ... Joe, W4TV -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jan Erik Holm Sent: Sunday, February 21, 2010 6:29 AM To: Hector Padron Cc: amf...@aol.com; elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 on AM with AL811H amplifier That will come out to 160W PEP on the K3 and 1600W PEP on the amp. I would not set the K3 to more then 25W (i e 100W PEP). Don´t know how much the AL80B can handle but 1600W PEP sounds to be too much. / Jim -- Hector Padron wrote: Good morning Ted,let me tell you something,since the very first day I got my K3 serial 2192 I have been using it on AM on 40M with guys who work on 7180,I use it with my AL-80B,when I key up the K3 puts out 40W and that makes 400W out of the amp and when I talk it swings up to 1KW,the TX modulation percentage its about 90 to 95% and the reports from the old timers using vintage radios is great always,some guys says look that I am using a big boat anchor AM station,in fact there was a guy who loved it so much that he was asking which company made the K3 because he wanted to have one. Without a doubt a K3 is an all mode perfect radio to own,73 AD4C For a refined ham it is compulsory to own a k3 --- On Sun, 2/21/10, amf...@aol.com amf...@aol.com wrote: From: amf...@aol.com amf...@aol.com Subject: [Elecraft] K3 on AM with AL811H amplifier To: Elecraft@mailman.qth.net Date: Sunday, February 21, 2010, 3:27 AM Just thought you'd all like to know that I have been getting GREAT AUDIO reports from running K3 #1717 on AM, into an AL811H amplifier driving the amp to about 125 watts carrier. Connecting the K3 to the amp was as simple as plugging in the relay cable and the coax. Running AM and using the sync detection on AM surpasses even my old boat anchor AM receivers. For me, the K3 is the true all purpose radio. 73 Ted W8IXY __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 on AM with AL811H amplifier
Joe, You are quite correct about limiting AM carrier power on the K3 to 25 watts and AL-80B carrier power to 200 watts. However, according to Ameritron and Tom, W8JI (designer of the AL-80B), 1000 watts PEP on SSB is the upper limit as is 800 watts on CW. The key to minimizing non-linearity is to tune with drive set to produce the maximum PEP that will be produced by the transmitted envelope and then slightly over-tune (less capacitance) the load control. Chuck, AE4CW Don´t know how much the AL80B can handle but 1600W PEP sounds to be too much. The AL-80B is a single 3-500Z. It is capable of 800W peak if it is to remain clean and should not be run at more than 500 W CW. 40W carrier from the K3 and 400W carrier from the AL-80B are, in both cases, grossly out of spec. The K3 should not be run at more than 25W of carrier (28W absolute max) and the AL-80B (or any single 3-500Z) should not be pushed to more than 200W carrier (absolute maximum). 73, ... Joe, W4TV -- View this message in context: http://n2.nabble.com/K3-on-AM-with-AL811H-amplifier-tp4605487p4609071.html Sent from the [K3] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 on AM with AL811H amplifier
On 2/21/10 6:23 AM, Joe Subich, W4TV wrote: The AL-80B is a single 3-500Z. It is capable of 800W peak if it is to remain clean and should not be run at more than 500 W CW. I'm surprised to hear this. Most people think a single 3-500Z can produce 750w ICAS without problems. -- Vic, K2VCO Fresno CA http://www.qsl.net/k2vco/ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 on AM with AL811H amplifier
However, according to Ameritron and Tom, W8JI (designer of the AL-80B), 1000 watts PEP on SSB is the upper limit as is 800 watts on CW. I don't normally disagree with Tom, W8JI. However, Eimac's data sheets on the 3-500Z - both the 1968 version and the current (1980) version - rate the PEP Output Power of a single tube in AB2 at 750 Watts. The 1980 version includes a set of at 3500V on the plate that pushes the output to 900 Watts PEP - NOT 1KW. The key to minimizing non-linearity is to tune with drive set to produce the maximum PEP that will be produced by the transmitted envelope and then slightly over-tune (less capacitance) the load control. And that's not something that one can do when trying to drive the AL-80B/K3 combination to 400 W carrier/1600W PEP output. 73, ... Joe, W4TV -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Chuck - AE4CW Sent: Sunday, February 21, 2010 5:30 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 on AM with AL811H amplifier Joe, You are quite correct about limiting AM carrier power on the K3 to 25 watts and AL-80B carrier power to 200 watts. However, according to Ameritron and Tom, W8JI (designer of the AL-80B), 1000 watts PEP on SSB is the upper limit as is 800 watts on CW. The key to minimizing non-linearity is to tune with drive set to produce the maximum PEP that will be produced by the transmitted envelope and then slightly over-tune (less capacitance) the load control. Chuck, AE4CW Don´t know how much the AL80B can handle but 1600W PEP sounds to be too much. The AL-80B is a single 3-500Z. It is capable of 800W peak if it is to remain clean and should not be run at more than 500 W CW. 40W carrier from the K3 and 400W carrier from the AL-80B are, in both cases, grossly out of spec. The K3 should not be run at more than 25W of carrier (28W absolute max) and the AL-80B (or any single 3-500Z) should not be pushed to more than 200W carrier (absolute maximum). 73, ... Joe, W4TV -- View this message in context: http://n2.nabble.com/K3-on-AM-with-AL811H-amplifier-tp4605487p 4609071.html Sent from the [K3] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 on AM with AL811H amplifier
While it may be able to produce 750W ICAS, Eimac rate it at 600W PEP for minimum distortion products. I would not think it wise to push it harder than that in AM. 73, ... Joe, W4TV -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Vic, K2VCO Sent: Sunday, February 21, 2010 11:06 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 on AM with AL811H amplifier On 2/21/10 6:23 AM, Joe Subich, W4TV wrote: The AL-80B is a single 3-500Z. It is capable of 800W peak if it is to remain clean and should not be run at more than 500 W CW. I'm surprised to hear this. Most people think a single 3-500Z can produce 750w ICAS without problems. -- Vic, K2VCO Fresno CA http://www.qsl.net/k2vco/ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 on AM with AL811H amplifier
I'm referring to your comment about 500W CW. On 2/21/10 9:32 PM, Joe Subich, W4TV wrote: While it may be able to produce 750W ICAS, Eimac rate it at 600W PEP for minimum distortion products. I would not think it wise to push it harder than that in AM. 73, ... Joe, W4TV -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Vic, K2VCO Sent: Sunday, February 21, 2010 11:06 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 on AM with AL811H amplifier On 2/21/10 6:23 AM, Joe Subich, W4TV wrote: The AL-80B is a single 3-500Z. It is capable of 800W peak if it is to remain clean and should not be run at more than 500 W CW. I'm surprised to hear this. Most people think a single 3-500Z can produce 750w ICAS without problems. -- Vic, K2VCO Fresno CA http://www.qsl.net/k2vco/ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3 on AM with AL811H amplifier
Just thought you'd all like to know that I have been getting GREAT AUDIO reports from running K3 #1717 on AM, into an AL811H amplifier driving the amp to about 125 watts carrier. Connecting the K3 to the amp was as simple as plugging in the relay cable and the coax. Running AM and using the sync detection on AM surpasses even my old boat anchor AM receivers. For me, the K3 is the true all purpose radio. 73 Ted W8IXY __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] [K3] K3 AM Synchronous Detector and the NY Jets
WEPN broadcasts the NY Jets game on 1050 kHz AM. Their antenna is in NJ, and their signal here on Long Island is usually weak with a lot of QSB and sidebands cancelling. This Sunday, however, I listened to the entire game with a clean and clear signal, thanks to the AM Synchonous Detector. USB seemed better than LSB. Thanks to the Elecraft guys for a great option. I was doing some work in the office = shack. The radio broadcast was several seconds ahead of the TV broadcast, so, if I heard something exciting, I could rush into the other room and watch the action. The bad news: even with the clear signal, the Jets still lost :( 73, John W2XS -- View this message in context: http://n2.nabble.com/K3-AM-Synchronous-Detector-and-the-NY-Jets-tp4055109p4055109.html Sent from the [K3] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3 in AM-Sync Mode Receiving WWV
I have been trying out the new AM-Sync mode by listening to WWV on its 5 frequencies and am seeing something that I wonder is a problem for my K3 (#1292) or is it being seen by others as well. I have observed that on the 10MHz WWV frequency only, that my K3 will momentarily unlock with the frequency jumping either up or down by as much as 200 Hz. The frequency quickly, less than a second, will be corrected, and all is well again. This occurs at what appears to be entirely random timing, from several minutes, to as often as a few seconds. I haven't noticed this happening on any of the other WWV frequencies that I have observed, being all of the rest except 2.5MHz which is not open to me this morning. I did notice this yesterday on 10MHz, but did not check the other frequencies until today. I find it difficult to believe that WWV is having jumps in its 10MHz transmission. Has anyone else noticed this, or do I need to be giving Elecraft help desk a call? Ken, NU4I __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 in AM-Sync Mode Receiving WWV
This problem may (or may not) be caused by selective fading, causing the real WWV carrier to disappear for a moment, whereby the K3 then locks up to one of the sidebands, perhaps from the 100 Hz time data, then returns to the main carrier when it again is strong enough. Of course it may be something else entirely, but that is one possibility. Disclaimer: This opinion is worth exactly what you had to pay for it. - Jim, KL7CC Kenneth Moorman wrote: I have been trying out the new AM-Sync mode by listening to WWV on its 5 frequencies and am seeing something that I wonder is a problem for my K3 (#1292) or is it being seen by others as well. I have observed that on the 10MHz WWV frequency only, that my K3 will momentarily unlock with the frequency jumping either up or down by as much as 200 Hz __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 in AM-Sync Mode Receiving WWV
... I find it difficult to believe that WWV is having jumps in its 10MHz transmission. Has anyone else noticed this, or do I need to be giving Elecraft help desk a call? AM Synchronous receive is in its early stages. We are aware of the behavior you describe and are improving the algorithms we are using. Also, keep in mind that AM-S is a tool in your toolbox. There will be times when regular AM envelope detection will work better, and times when using the SSB demodulator will provide superior results. 73, Lyle KK7P __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 in AM-Sync Mode Receiving WWV
This is exactly what's happening, and we're looking into a possible change in the way we handle it. For now, you can leave VFO auto-tracking turned off when listening to WWV (tap CWT until the 'T' icon turns off). You can tune the signal in manually until the PLL locks (+/- 10 Hz), or tap SPOT to have it track the signal long enough to lock. 73, Wayne N6KR On Nov 16, 2009, at 8:20 AM, Jim Wiley wrote: This problem may (or may not) be caused by selective fading, causing the real WWV carrier to disappear for a moment, whereby the K3 then locks up to one of the sidebands, perhaps from the 100 Hz time data, then returns to the main carrier when it again is strong enough. Of course it may be something else entirely, but that is one possibility. Disclaimer: This opinion is worth exactly what you had to pay for it. - Jim, KL7CC Kenneth Moorman wrote: I have been trying out the new AM-Sync mode by listening to WWV on its 5 frequencies and am seeing something that I wonder is a problem for my K3 (#1292) or is it being seen by others as well. I have observed that on the 10MHz WWV frequency only, that my K3 will momentarily unlock with the frequency jumping either up or down by as much as 200 Hz __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 in AM-Sync Mode Receiving WWV
Yes, I can clearly see this happening on my panadaptor lash-up using an SDR and Rocky software from the IF output port of the K3. Thanks for pointing this out. Obviously I shouldn't need to leave VFO Tracking on all the time when receiving WWV. Ken, NU4I -Original Message- From: Wayne Burdick [mailto:n...@elecraft.com] Sent: Monday, November 16, 2009 11:44 AM To: Jim Wiley Cc: Kenneth Moorman; Elecraft@mailman.qth.net Subject: Re: K3 in AM-Sync Mode Receiving WWV This is exactly what's happening, and we're looking into a possible change in the way we handle it. For now, you can leave VFO auto-tracking turned off when listening to WWV (tap CWT until the 'T' icon turns off). You can tune the signal in manually until the PLL locks (+/- 10 Hz), or tap SPOT to have it track the signal long enough to lock. 73, Wayne N6KR On Nov 16, 2009, at 8:20 AM, Jim Wiley wrote: This problem may (or may not) be caused by selective fading, causing the real WWV carrier to disappear for a moment, whereby the K3 then locks up to one of the sidebands, perhaps from the 100 Hz time data, then returns to the main carrier when it again is strong enough. Of course it may be something else entirely, but that is one possibility. Disclaimer: This opinion is worth exactly what you had to pay for it. - Jim, KL7CC Kenneth Moorman wrote: I have been trying out the new AM-Sync mode by listening to WWV on its 5 frequencies and am seeing something that I wonder is a problem for my K3 (#1292) or is it being seen by others as well. I have observed that on the 10MHz WWV frequency only, that my K3 will momentarily unlock with the frequency jumping either up or down by as much as 200 Hz __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 in AM-Sync Mode Receiving WWV
I have observed that on the 10MHz WWV frequency only, that my K3 will momentarily unlock with the frequency jumping either up or down by as much as 200 Hz. The frequency quickly, less than a second, will be corrected, and all is well again. This occurs at what appears to be entirely random timing, from several minutes, to as often as a few seconds. The 10 MHz WWV may be the worst place to check the performance of the K3 Sync-AM. I feel the 10 MHz WV transmitter has some apparent frequency modulation and audio distortion not present on any of the other frequencies (or on WWHV when I can hear it). On the other hand, I also detect the momentary unlock on the 15 MHz WWV transmissions but those unlocks are associated with audible fading. 73, ... Joe, W4TV -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Kenneth Moorman Sent: Monday, November 16, 2009 11:04 AM To: Elecraft@mailman.qth.net Subject: [Elecraft] K3 in AM-Sync Mode Receiving WWV I have been trying out the new AM-Sync mode by listening to WWV on its 5 frequencies and am seeing something that I wonder is a problem for my K3 (#1292) or is it being seen by others as well. I have observed that on the 10MHz WWV frequency only, that my K3 will momentarily unlock with the frequency jumping either up or down by as much as 200 Hz. The frequency quickly, less than a second, will be corrected, and all is well again. This occurs at what appears to be entirely random timing, from several minutes, to as often as a few seconds. I haven't noticed this happening on any of the other WWV frequencies that I have observed, being all of the rest except 2.5MHz which is not open to me this morning. I did notice this yesterday on 10MHz, but did not check the other frequencies until today. I find it difficult to believe that WWV is having jumps in its 10MHz transmission. Has anyone else noticed this, or do I need to be giving Elecraft help desk a call? Ken, NU4I __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3 Synchronous AM Detection - clicking on SHIFT Width ?
Interesting to hear watch the Sync mode zero in on AM stations as they 'pass it around' !! Anybody else hearing a clicking noise while turning the SHIFT or WIDTH controls? 73, Bill N2BC (K3/00929) __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 Synchronous AM Detection - clicking on SHIFT Width ?
Hi Bill, Yes, I've noticed that also. But, I've always had some clicks when adjusting filter widths and shifting for the last half dozen or so firmware upgrades. I have serial #338 here. Not sure if that makes a difference or not. As a side note: Thanks Wayne for a very nice feature. A side effect I found right off is that is you are a LP-Pan/Power SDR user, you can click on AM stations with the accuracy of throwing a grenade and the K3 will lock in for you without manually getting closer on the tuning dial ;-) 73, Dave W8FGU Bill wrote: Interesting to hear watch the Sync mode zero in on AM stations as they 'pass it around' !! Anybody else hearing a clicking noise while turning the SHIFT or WIDTH controls? 73, Bill N2BC (K3/00929) __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 Synchronous AM Detection - clicking on SHIFT Width ?
Yes, I've noticed that also. But, I've always had some clicks when adjusting filter widths and shifting... When a moderately strong signal is in the passband and you make a step change, there is a click. AM signals are usually pretty strong, so the clicks are more pronounced. 73, Lyle KK7P __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3: Seeking AM Sync input
We have an experimental implementation of AM sync working. Synchronous AM receive can provide better performance than a traditional AM detector during selective fading. In our case it can also quickly and automatically retune the receive VFO, tracking AM stations that might be mistuned from a nominal net frequency by up to a few kHz. Certain user interface issues still need refinement, and we could use your input. If you're a frequent user of AM mode who might benefit from AM sync--especially if you participate in multi-station round- tables, or have used AM sync on other receivers--please email me directly (n6kr at elecraft dot com). Thanks, Wayne N6KR __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3: Seeking AM Sync input
I've gotten lots of input on this topic, now -- thanks. I'll be getting back to those who responded later this week. 73, Wayne N6KR We have an experimental implementation of AM sync working Certain user interface issues still need refinement, and we could use your input __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3: Poor AM receive audio quality
Thanks for your replies guys. Hopefully Icom's SP20 makes a difference. I've received too many emails privately to reply to each separately sorry so I hope those who were kind enough to spend their time writing to me won't mind if I answer all questions here? I do have a KBPF3 general coverage bandpass filters installed and my comments about the relatively poor audio quality referred to the sound coming from the K3's internal speaker. While the R2000 sounds terrific using a 6KHz max bandwidth to listen to AM broadcast, the K3 just does not sound very nice at all despite being opened up to 10KHz bandwidth. I couldn't believe how poor it sounded when I turned the rig on the first time (it was factory assembled). I had that sinking feeling you get when you first suspect you've not spent your money on what you should have. At this stage I do expect the K3 will sound fine with the SP20, after all 50Hz and 100Hz were included in the RX EQ for a reason? It's a pity their level doesn't make any difference when listening to the K3's internal speaker. - Shane -- View this message in context: http://n2.nabble.com/K3%3A-Poor-AM-receive-audio-quality-tp1642606p1651351.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3: Poor AM receive audio quality
Hello Shane, Assuming there's nothing wrong with your internal speaker or it's mounting I still wouldn't expect it to sound very good. I view that little speaker as little more than a device to tell if the radio's working or not, and not suitable for listening. If you haven't done so, try an external speaker, or better still, two. The AFX feature is really nice. After all the K3 -is- a communications transceiver. (:-) 73! Ken Kopp - K0PP elecraftcov...@rfwave.net ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3: Poor AM receive audio quality
Relative to my 1983 Kenwood R-2000 (http://www.rigpix.com/kenwood/r2000.htm), my K3 sounds awful when listening to any AM broadcast stations. I have the 6KHz and 12KHz filters installed and despite widening the AM IF bandwidth to 10KHz and spending many hours fussing about with the RX EQ, I cannot make the K3 to sound even remotely enjoyable. Quite frankly, this is really annoying me although I am impressed by the K3 thanks Elecraft. I've ordered an Icom SP20 in the hope this will help but while waiting for it to arrive I did some research and stumbled on this archived thread - http://www.mail-archive.com/elecraft@mailman.qth.net/msg52230.html, which suggests the K3's DSP attenuates the IF passband below 250Hz and the frequency range of the IF passband will be widened in a firmware upgrade. So I have the following questions - Why have the low frequencies been attenuated? Is 250Hz the -6dB or -3dB point? Will the passband be widened in an upgrade? I do admit though that the K3's SSB audio is FAR superior to that of the R2000 (but it does have a VFO resolution of only 100Hz). The K3's SSB audio does sound great. Shane VK5ABQ -- View this message in context: http://n2.nabble.com/K3%3A-Poor-AM-receive-audio-quality-tp1642606p1642606.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3: Poor AM receive audio quality
Shane, you will probably find external speakers transform the quality of the K3. I am using a cheap pair of HiFi book shelf speakers that cost under 20 GBP and it sounds great on local AM broadcast stations using no RX EQ and 6 KHz IF filter. In side by side comparisons with a Perseus SDR and fairly cheap PC speakers on my PC, the K3 sounds much better, with the internal K3 speaker the opposite was the case. The speakers I am using are from a UK high street chain store, www.argos.co.uk and stock number 513/6113. You might want to try a pair of speakers, as the pseudo stereo effect of AFX is amazing. 73 Dave, G4AON K3/100 #80 - Relative to my 1983 Kenwood R-2000 (http://www.rigpix.com/kenwood/r2000.htm), my K3 sounds awful when listening to any AM broadcast stations. I have the 6KHz and 12KHz filters installed and despite widening the AM IF bandwidth to 10KHz and spending many hours fussing about with the RX EQ, I cannot make the K3 to sound even remotely enjoyable. Shane VK5ABQ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3: Poor AM receive audio quality
You are right, even with an external speaker. I would not say it is bad, but my THS480 is much better, as is my SDR IQ. Like the difference between a cassette tape and a CD say. I think the problem is the low frequency response - it could be something to do with the DSP filtering. The good thing is, it can be changed. For comms, you do not need full frequency response. The K3 is designed primerily for communications. Mike -- View this message in context: http://n2.nabble.com/K3%3A-Poor-AM-receive-audio-quality-tp1642606p1644878.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3: Synchronous AM Receive
Hi Elecraft, I have a K3 on order so I'd like to know whether you've been able to schedule work to begin on Synchronous AM yet please? Just curious and keen to see this feature implemented. Thanks, Shane VK5ABQ -- View this message in context: http://n2.nabble.com/K3%3A-Synchronous-AM-Receive-tp470365p1077566.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 on AM FM on YouTube
Greetings folks, I have just posted a video of my K3 on AM and FM on 10 metres (5 watts carrier AM 12watts FM) and believe it or not on 20 metre AM with 5 watts. The video was shot on 20 July. I received very good modulation reports on AM. The K3 on receive is first class. The DSP filtering enabled me to greatly reduce the effect from QRM from an SSB station that opened up very close to the frequency I was using. I have also had some very good QSOs on 80M AM with this low power. Elecraft have come up with a very good radio for AM users. The link for video is http://www.youtube.com/watch?v=-Ts6h2sb4Tw 73 John G3YPZ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 and AM
Hello to the group. I hope everyone is enjoying their K3 as much as I. I got on AM Sunday morning for the first time. All those on the net said that the K3 sounded great. I wonder if anyone else has used their K3 on AM and have any suggestions as to power levels and carrier levels and if anyone has used a linear amplifier on AM with the K3. I've never operated AM and I vaguely remember that the power levels are different on AM than SSB. My amplifier is a Acom 1000. I would be interested in any suggestions. Best 73, Steve W0SZ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] K3 and AM
Steve, On AM, your carrier power should be about 25% of the peak transmitter power. For a K3, which runs 120W output, this means that the carrier output should be about 30W. I believe the K3 automatically sets the correct carrier-to-peak power ratio, so that when you scale back the K3's power output, the AM carrier is reduced proportionately. When running a linear amplifer on AM, the same percentage applies. In other words, for a legal limit linear amplifier whose power output is 1500 Watts, your carrier power should be 375W. Then, your modulation peaks will be the full 1500W. When tuning your linear amplifier for AM, DO NOT load it with the AM carrier of 375W. Instead, always load it in the CW mode at the full 1500W output. Then when you run it on AM, the amplifier will be tuned properly for 375W of carrier. Just to remind you where the 25% AM carrier rule comes from, in a 100% modulated AM signal, the RF envelope varies from zero to twice the carrier average voltage. In other words, the modulation peaks will be twice the voltage of the unmodulated carrier. Since power varies as the square of the voltage, twice the voltage is four times the power. Thus, your transmitter and amplifier has to be rated at four times the unmodulated carrier value. 73, Jim W8ZR -Original Message- From: [EMAIL PROTECTED] [mailto:elecraft- [EMAIL PROTECTED] On Behalf Of W0SZ Sent: Monday, July 28, 2008 11:32 AM To: elecraft@mailman.qth.net Subject: [Elecraft] K3 and AM Hello to the group. I hope everyone is enjoying their K3 as much as I. I got on AM Sunday morning for the first time. All those on the net said that the K3 sounded great. I wonder if anyone else has used their K3 on AM and have any suggestions as to power levels and carrier levels and if anyone has used a linear amplifier on AM with the K3. I've never operated AM and I vaguely remember that the power levels are different on AM than SSB. My amplifier is a Acom 1000. I would be interested in any suggestions. Best 73, Steve W0SZ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 and AM
One important note - Like most ham rigs, the K3 is officially specified at 100W. While the control turns up to 120W, and most rigs will go above above 100w, they will not make that power level on all units on all bands. Above 100W it is not guaranteed to meet all specifications. 73, Eric WA6HHQ Dr. James C. Garland wrote: Steve, On AM, your carrier power should be about 25% of the peak transmitter power. For a K3, which runs 120W output, this means that the carrier output should be about 30W. I believe the K3 automatically sets the correct carrier-to-peak power ratio, so that when you scale back the K3's power output, the AM carrier is reduced proportionately. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] [K3] Transmit AM through FM Filter?
Don Wilhelm wrote: The 'without issue' part is important here. While it could possibly work, to work with spurs and other 'bad things happening' is not likely. Did you, instead, really mean without spurs... here? -- David Woolley The Elecraft list is a forum for the discussion of topics related to Elecraft products and more general topics related ham radio List Guidelines http://www.elecraft.com/elecraft_list_guidelines.htm ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] [K3] Transmit AM through FM Filter?
Checked the archives, but unable to find an answer. If I was to purchase ONLY an FM filter, can I also TX AM through it without issue? I know RXing is not a problem. Thanks 73, Dan - N3ND (anxiously awaiting a K3) ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] [K3] Transmit AM through FM Filter?
Dan, The 'without issue' part is important here. While it could possibly work, to work with spurs and other 'bad things happening' is not likely. The 6kHz filter is for AM transmit. The K3 may even prevent AM transmission if that filter is not installed, but I don't know that for certain. 73, Don W3FPR Dan Atchison wrote: Checked the archives, but unable to find an answer. If I was to purchase ONLY an FM filter, can I also TX AM through it without issue? I know RXing is not a problem. Thanks 73, Dan - N3ND (anxiously awaiting a K3) ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] [K3] Transmit AM through FM Filter?
Checked the archives, but unable to find an answer. If I was to purchase ONLY an FM filter, can I also TX AM through it without issue? The current firmware blocks the use of any foilter for AM Tx other than 6 kHz. 73, Lyle KK7P ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] [K3] Transmit AM through FM Filter?
As far as I know, the K3 filters are not intelligent, the K3 has no way of knowing what the filter is other than by your setup. If the FM filter was defined as a 5 khz filter, the K3 would probably send the signal through it and the signal would probably be spectrally purer than the vast majority of the gear that's being used on AM today. But the only way to find out would be to put it on a spectrum analyzer. Elecraft has spoken of removing the firmware block at some point in the future. There is also a block that keeps you from transmitting out of band, which is annoying when you're connected to a dummy load. [Elecraft] [K3] Transmit AM through FM Filter? Lyle Johnson kk7p at wavecable.com Fri Jun 27 13:13:42 EDT 2008 Previous message: [Elecraft] [K3] Transmit AM through FM Filter? Checked the archives, but unable to find an answer. If I was to purchase ONLY an FM filter, can I also TX AM through it without issue? The current firmware blocks the use of any foilter for AM Tx other than 6 kHz. 73, Lyle KK7P ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3: Synchronous AM Receive
Yeah, well... it had better be soon. Us SWL natives are getting restless! ;-) (We tease because we love...) Paul WW2PT Lyle KK7P wrote: Any idea whether the synchronous AM receive capability will require hardware mods or will it solely be a firmware modification? It will be a firmware update only. 73, Lyle KK7P -- View this message in context: http://www.nabble.com/K3%3A-Synchronous-AM-Receive-tp17959523p18011337.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3: Synchronous AM Receive
I noticed that Sync Det is already listed in the config menu (just not implemented yet.) Likewise for audio annunciators for button pushes (and button identification in Morse... did I dream that?... can't seem to find it now.) Anyhow, I think that will be very nice as the tactile feedback on the buttons is not as snappy as it is on the K2. 73, Drew AF2Z On Thu, 19 Jun 2008 08:21:46 -0700 (PDT), you wrote: Yeah, well... it had better be soon. Us SWL natives are getting restless! ;-) (We tease because we love...) Paul WW2PT ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3: Synchronous AM Receive
WW2PT wrote: Yeah, well... it had better be soon. Us SWL natives are getting restless! ;-) (We tease because we love...) Paul WW2PT Yes and I'm having trouble justifying $12,500 for an IC-7800 (which also has synch AM RX). I've been told though that the IC-7700 doesn't have synch AM. Does anyone here disagree with this? I reckon I could almost justify the money for that. -- View this message in context: http://www.nabble.com/K3%3A-Synchronous-AM-Receive-tp17959523p18020330.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3: Synchronous AM Receive
Hi Paul, I also own a IC-7800 but it does NOT have sync AM detector (at least I haven't found it). I just checked the manual and cannot find any reference to Sync AM. Maybe I missed something. How do you get your 7800 in sync AM mode? Using my K3 + LP-PAN and PowerSDR I enjoy Sync AM while listening to SW broadcasts. Works great! Thanks for any info on 7800 Sync AM, Frank - W6NEK - Original Message - From: Shane White [EMAIL PROTECTED] To: elecraft@mailman.qth.net Sent: Thursday, June 19, 2008 4:39 PM Subject: Re: [Elecraft] K3: Synchronous AM Receive WW2PT wrote: Yeah, well... it had better be soon. Us SWL natives are getting restless! ;-) (We tease because we love...) Paul WW2PT Yes and I'm having trouble justifying $12,500 for an IC-7800 (which also has synch AM RX). I've been told though that the IC-7700 doesn't have synch AM. Does anyone here disagree with this? I reckon I could almost justify the money for that. -- View this message in context: http://www.nabble.com/K3%3A-Synchronous-AM-Receive-tp17959523p18020330.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3: Synchronous AM Receive
Wasn't me who said it! I know little about the 7800. But I have seen specs online that indicate Synchronous AM mode (here for example: http://tinyurl.com/43yz2g), but no mention of it on the Icom web site or in the English brochure that I have. As for the K3... I can (but won't) name a handful of radios with bad synchronous AM detection, and only a few that implement it effectively. I'm banking on my belief that Elecraft can and will do it right if it isn't rushed. Right, Lyle? ;-) Paul WW2PT W6NEK wrote: Hi Paul, I also own a IC-7800 but it does NOT have sync AM detector (at least I haven't found it). I just checked the manual and cannot find any reference to Sync AM. Maybe I missed something. How do you get your 7800 in sync AM mode? Using my K3 + LP-PAN and PowerSDR I enjoy Sync AM while listening to SW broadcasts. Works great! Thanks for any info on 7800 Sync AM, Frank - W6NEK -- View this message in context: http://www.nabble.com/K3%3A-Synchronous-AM-Receive-tp17959523p18021874.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3: Synchronous AM Receive
WW2PT wrote: Wasn't me who said it! I know little about the 7800. But I have seen specs online that indicate Synchronous AM mode (here for example: http://tinyurl.com/43yz2g), but no mention of it on the Icom web site or in the English brochure that I have. As for the K3... I can (but won't) name a handful of radios with bad synchronous AM detection, and only a few that implement it effectively. I'm banking on my belief that Elecraft can and will do it right if it isn't rushed. Right, Lyle? ;-) Paul WW2PT My local Icom agent rang Icom Hong Kong yesterday who told him that the IC-7800 uses synchronous AM receive automatically. You can't engage or disengage it. They also told him that the 7800 is the only Icom radio to incorporate synchronous AM. I find it hard to believe that the 7700 doesn't feature it though considering it's new. Shane VK5ABQ -- View this message in context: http://www.nabble.com/K3%3A-Synchronous-AM-Receive-tp17959523p18022156.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3: Synchronous AM Receive
Shane White wrote: Any progress on this yet please Elecraft? VK5ABQ. Any idea whether the synchronous AM receive capability will require hardware mods or will it solely be a firmware modification? If hardware mods are required I would rather wait to buy a K3 considering the radio would need to be sent back from Australia. -- View this message in context: http://www.nabble.com/K3%3A-Synchronous-AM-Receive-tp17959523p17995206.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3: Synchronous AM Receive
Any idea whether the synchronous AM receive capability will require hardware mods or will it solely be a firmware modification? It will be a firmware update only. 73, Lyle KK7P ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3: Synchronous AM Receive
Any progress on this yet please Elecraft? VK5ABQ. -- View this message in context: http://www.nabble.com/K3%3A-Synchronous-AM-Receive-tp17959523p17959523.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
