Re: [Elecraft] K3:CW send decode on a Straight key?
John - To check your CW why not use a program such as CwGet v1.65 by UA9OV? This is excellent for checking your Morse sending using either a straight key or a bug. Alternatively, you can send on an external simple r.f. oscillator using a straight key and listen to it on your K3. The decoder on the K3 works very well in that way. 73 David G4DMP In a recent message, juergen wrote ... > >Hi > >Is there anyway of making the K3's CW decoder work on the straight key >port? I am using an external logikey and would like to see what I am >sending now and then. -- David G4DMP Leeds, England, UK -- __ 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:CW send decode on a Straight key?
I'd like to see this as well as I enjoy being able to see the TX decode when the paddles are in the back of the radio but when I run for a contest the paddles go into the K1EL keyer and the straight key port is used. Would be nice to be able to always use the K1EL and not lose the decode feature. ~Brett On Sat, 2010-01-23 at 22:02 -0800, juergen wrote: > Hi > > Is there anyway of making the K3's CW decoder work on the straight key port? > I am using an external logikey and would like to see what I am sending now > and then. > > John > > > > __ > 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:CW send decode on a Straight key?
Hi Is there anyway of making the K3's CW decoder work on the straight key port? I am using an external logikey and would like to see what I am sending now and then. John __ 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 why can't we use narrow Tx filters
I have agree that it puzzles me that the K3 will do ESSB but yet not be able to narrow the Tx bandwidth. There are many times that I would have liked to be able to do this. Icom's flagship radios (7800 and 7700) do this and I have been listening when the adjustment has been done and I found the audio became much easier to copy as the band was noisy with many stations operating close together. Is there a reason this cannot be enabled Elecraft? 73's Gary VK4FD Sent via BlackBerry® from Telstra __ 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: Why can't I use my 1.8kHz filter for SSB TX?
Hi Brian I would also like to know the answer as well. Its a feature that works well on the Icom PRO radios. You can narrow the TX bandwidth and produce very penetrating audio without playing around all day with mic EQ settings. In fact most cheap mics can be made to sound pretty decent when transmitting through a narrow bandwidth filter. I am surprised that variable TX bandwidth is not a feature on the K3 yet. Another feature that works well is the Kenwood High Boost. This feature is found on the TS870S, TS850S and the TS480. This high boost can brighten most microphones without playing with a TX EQ all day. Its very effective on 75 meters on SSB for cutting through QRN. It certainly sounds better than the excessive bass and ESSB audio that people torture your ears with. ESSB station who call people in the DX window with the excessive bassy audio should be put up against the wall and shot for torturing other people. I have found the K3's DSP filter on 1.5KHZ bandwidth to be very effective. We just need people that use communications quality audio for this filter bandwidth. The Heil HC4 and HC5 are fantastic microphones for DX work on the K3. John --- On Sat, 1/23/10, Brian Machesney wrote: > From: Brian Machesney > Subject: [Elecraft] K3: Why can't I use my 1.8kHz filter for SSB TX? > To: "Elecraft Reflector" > Date: Saturday, January 23, 2010, 7:59 PM > I've searched the archives and found > that use of a filter other than 2.7kHz > for SSB TX seems to be forbidden. One selects a > "non-standard" filter for > ESSB; why can' t this filter be the 2.1kHz or 1.8kHz > filter? > > -- > 73 -- Brian -- K1LI > __ > 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 - Would like wider CW receive, menu setting?
On my K2 I am used to listing on the 2.7k filter so I can hear up or down the band a ways until I find a signal. I just built my new K3 today. It is limiting the CW receive passband to about 1.9k and cuts off at 2000 htz on the high end. This is even though I set the width for 2.8k. Is there a menu setting to adjust this? The passband on SSB really goes well over 2.7k. I have the 2.7k and .5k 5 pole filters installed. Even when I use shift to raise the CW pass band, the upper cut off will go up to about 2400 htz but then cuts off at the bottom. The cut at the top is steep leading me to believe that it is DSP generated, the cut at the bottom is more tapered and looks like the edge of the crystal filter. Also, is there a way to adjust the BFO so the entire passband is shifted a littler higher on CW only? (I dont want to change my tone pitch which I keep at 700). On my K2, the 2.7K passband on CW was set up from 100 htz to 2800 hts and I would like to set up the K3 as close to that as I can for listening up and down the band. Thanks for your help! Dean __ 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] A K3 is Born
Well I received k3 #3873 in the mail yesterday. Couldn't sleep so I got up at 1:00 AM and started the build. Finished it this afternoon and having a lot of fun. What a great radio with such versatility. My other radio is a K2 #5319. Both rigs are 12 watt models. Thanks for all of the great information that has been written here. It really helped me to make the decision on this rig. I will probably have some technical questions, but the build went perfect and everything seems to be working well. I might just stay up all weekend!! Dean __ 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] A help for a friend with an IC-7800
I know this is off topic for a K3 group but I do have a friend in Spain who is looking for help of how to connect the cables,devices,keyboard,etc to his IC-7800 for digital modes,he just need good resources links to access them from Spain. Thanks in advance for your help. Please writte me directly not to take the group with this matter. AD4C "For a refined ham it is compulsory to own a 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
[Elecraft] Elecraft CW Net Announcement
Good Evening, Surprisingly the weather was dry and clear this week. More sun this week than I have seen in over a month. It was pleasant. The weather forecast has been for rain and clouds each day. They are not doing well in the prediction business; I will stick with my much more reliable weather rock :) The only time it did not work for me was when the wind was so strong it blew into the next county. 150 mph winds can do things like that. Propagation was mostly good due to the more active sun. Sunspots and coronal mass ejections are keeping the aurora photographers happy and the ionosphere perked up. The fox hunts were fun but the 40 meter session was tough. I could not hear either one well enough to even bother to send a dit. Oh well. 80 meters was much better and I found both of them and worked them. I am waiting for the summer 20 meter hunts. That band seems to work better for me. Please join us tomorrow evening. 1) Hail signs (first letter or two of the suffix of your call) 2) NCS help (as well as QSP/QNP help) Sunday 2300z (Sunday 3 PM PST) 14050 kHz Monday z (Sunday 4 PM PST) 7045 kHz (this frequency is being used by the Haiti nets) I will monitor it for a while and then find a spot about 2 kHz up. Around 7047 kHz or so. Stay warm, Kevin. KD5ONS - __ 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: Why can't I use my 1.8kHz filter for SSB TX?
I've searched the archives and found that use of a filter other than 2.7kHz for SSB TX seems to be forbidden. One selects a "non-standard" filter for ESSB; why can' t this filter be the 2.1kHz or 1.8kHz filter? -- 73 -- Brian -- K1LI __ 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: RxA mod
> I've failed to find what it was for, so any chance of a reminder, please? > It improves the strong signal protection for the Rx ANT input on early KXV3s. 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: Power output low on 30 meter band
A few days ago, I repaired my K3 which had this problem as it came from the factory. After following diagnostic instructions from Elecraft, what I found was that the band pass filter at the level that includes the drive to the transverter output was mis-tuned. The following is part of my report my report to Wayne and to Elecraft support. C179 and C183 are trimmer capacitors for the band pass filter at the level before the transceiver output. If you don't have the optional transceiver output accessory, this method becomes more difficult. "C179 was peaked, I assume properly. C183 was stuck and didn't want to turn with the alignment tool. I used a jeweler's screwdriver that didn't have an insulated sheath and "un-stuck" C183. Next, I peaked C183. At 10.149, a cw tone is 2.3 divisions peak on the scope; at 10.101, the cw tone is 2.1 divisions. Reverting to normal HF mode, 110 watts output is reached with no problem. The other bands seem unchanged with normal full output, etc. " The diagnostic process that I followed requires that you have something to measure the drive level at that point on 30 meters and also 40 meters; a used a dual trace 30 MHz oscilloscope. Another possibility is that a 8.215 MHz notch filter is mis-tuned; apparently this has happened before. Let me know if you need more info.. Wayne and Elecraft support in the person of Gary Surrency were quite helpful. Dunc, W5DC Phil Hystad wrote: > Since putting together my K3 two weeks ago I had a chance to try it out on 30 > meters today. I tuned up my delta loop to 10 meters and then noticed that > the power was low. I thought that maybe my meters were reading funny or > something funny about the antenna so I switched over to my Icom 756 Pro III > to try the same antenna. It was dead on with a 1.1:1 SWR on the same > frequency of 10.106 MHz. And, the meters for the Pro III were reading about > 101 watts output (two different meters). > > So I switched the antenna back to the K3 and checked the SWR and it was about > the same, 1.2:1 for the same frequency. But, the power output is only about > 65 watts even though the power adjust knob reads 100 watts. I tried > different readings and about 55 watts, the external meter power output starts > to flatten out compared to the digital readout of the power on the K3 (the > external meter is an LP-100A). > > All other bands show good power output. > > Any hints? > > 73, phil, K7PEH > __ > 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] Elecraft SSB net
Ignore this email. I hit a wrong key. Sorry. 73, Phil, NS7P On Sat 01/23/10 3:52 PM , ph...@rio.com sent: > > > On Sat 01/23/10 3:47 PM , "Phil Hystad" k7...@comca > st.net sent:> OK, I fixed the problem. The SWR reading on the > K3 meter was showing about> a 2.8:1 SWR. Obviously I forgot to tune through > the ATU. I did that and> it fixed the problem. > > peh > > > > Begin forwarded message: > > > > > From: Phil Hystad st.net>> Date: January 23, 2010 3:43:45 PM > PST> > To: Elecraft Discussion List > r...@mai > lman.qth.net>> Subject: [Elecraft] K3: Power output low on > 30> meter band> > > > Since putting together my K3 two weeks ago > I had> a chance to try it out on 30 meters today. I > tuned up my delta loop to 10> meters and then noticed that the power was low. > I thought that maybe my> meters were reading funny or something funny > about the antenna so I> switched over to my Icom 756 Pro III to try the > same antenna. It was dead> on with a 1.1:1 SWR on the same frequency of > 10.106 MHz. And, the meters> for the Pro III were reading about 101 watts > output (two different> meters).> > > > So I switched the antenna back to the K3 > and> checked the SWR and it was about the same, 1.2:1 > for the same frequency. > But, the power output is only about 65 watts > even though the power adjust> knob reads 100 watts. I tried different > readings and about 55 watts, the> external meter power output starts to > flatten > out compared to the digital> readout of the power on the K3 (the external > meter is an> LP-100A).> > > > All other bands show good power > > output.> > > > Any hints? > > > > > > 73, phil, K7PEH > > > > > > __> Elecraft > mailing list> > Home: > > http://mailman.qth.net/mailman/listinfo/elecraft> > Help: http://mailman.qth.net/mmfaq.htm> Post: Elec> r...@mai > lman.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/elecraftHelp: > > http://mailman.qth.net/mmfaq.htmPost: Elec> r...@mai > lman.qth.net> This list hosted by: http://www.qsl.netPlease help support this > email > list: http://www.qsl.net/donate.html> > > > > __ > Elecraft mailing list > Home: > http://mailman.qth.net/mailman/listinfo/elecraftHelp: > http://mailman.qth.net/mmfaq.htmPost: Elec > r...@mailman.qth.net > This list hosted by: http://www.qsl.netPlease 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 How do I uncouple VFO's?
See your K3 Owner's Manual section titled "Using the VFOs" for the answer. 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] Elecraft SSB net
On Sat 01/23/10 3:47 PM , "Phil Hystad" k7...@comcast.net sent: > OK, I fixed the problem. The SWR reading on the K3 meter was showing about > a 2.8:1 SWR. Obviously I forgot to tune through the ATU. I did that and > it fixed the problem. > peh > > Begin forwarded message: > > > From: Phil Hystad st.net>> Date: January 23, 2010 3:43:45 PM PST > > To: Elecraft Discussion List r...@mailman.qth.net>> Subject: [Elecraft] K3: Power output low on 30 > meter band> > > Since putting together my K3 two weeks ago I had > a chance to try it out on 30 meters today. I tuned up my delta loop to 10 > meters and then noticed that the power was low. I thought that maybe my > meters were reading funny or something funny about the antenna so I > switched over to my Icom 756 Pro III to try the same antenna. It was dead > on with a 1.1:1 SWR on the same frequency of 10.106 MHz. And, the meters > for the Pro III were reading about 101 watts output (two different > meters).> > > So I switched the antenna back to the K3 and > checked the SWR and it was about the same, 1.2:1 for the same frequency. > But, the power output is only about 65 watts even though the power adjust > knob reads 100 watts. I tried different readings and about 55 watts, the > external meter power output starts to flatten out compared to the digital > readout of the power on the K3 (the external meter is an > LP-100A).> > > All other bands show good power > output.> > > Any hints? > > > > 73, phil, K7PEH > > > __> Elecraft > mailing list > > Home: > http://mailman.qth.net/mailman/listinfo/elecraft> Help: > http://mailman.qth.net/mmfaq.htm> Post: Elec > r...@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/elecraftHelp: > http://mailman.qth.net/mmfaq.htmPost: Elec > r...@mailman.qth.net > This list hosted by: http://www.qsl.netPlease 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: RxA mod
I was browsing the mods applicable since my K3 was "born" and while the majority of mods carry an explanation of what they were for, the RxA mod doesn't. I've failed to find what it was for, so any chance of a reminder, please? Thanks & 73 DaveL G3TJP __ 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 How do I uncouple VFO's?
With all the RTTY on 40m from the BARTG Sprint, I started messing around with the Data Decode capabilities of my K3. Seems to work great. I went back to CW, turned Text Decode off, and now I find that VFO B tunes along with VFO A. They're not on the same frequency, and I can set B to whatever frequency I want with the VFO B knob, but when I adjust the main tuning knob, both VFO's change together. 73, Fred K6DGW Auburn CA __ 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] Elecraft SSB net
Hi gang, The weekly Elecraft SSB net will be tomorrow at 1800Z on or around 14.314 MHz. Roger, W7SJ, in Washington State will be the net control. Have a good net. 73, Phil, NS7P __ 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: Power output low on 30 meter band
OK, I fixed the problem. The SWR reading on the K3 meter was showing about a 2.8:1 SWR. Obviously I forgot to tune through the ATU. I did that and it fixed the problem. peh Begin forwarded message: > From: Phil Hystad > Date: January 23, 2010 3:43:45 PM PST > To: Elecraft Discussion List > Subject: [Elecraft] K3: Power output low on 30 meter band > > Since putting together my K3 two weeks ago I had a chance to try it out on 30 > meters today. I tuned up my delta loop to 10 meters and then noticed that > the power was low. I thought that maybe my meters were reading funny or > something funny about the antenna so I switched over to my Icom 756 Pro III > to try the same antenna. It was dead on with a 1.1:1 SWR on the same > frequency of 10.106 MHz. And, the meters for the Pro III were reading about > 101 watts output (two different meters). > > So I switched the antenna back to the K3 and checked the SWR and it was about > the same, 1.2:1 for the same frequency. But, the power output is only about > 65 watts even though the power adjust knob reads 100 watts. I tried > different readings and about 55 watts, the external meter power output starts > to flatten out compared to the digital readout of the power on the K3 (the > external meter is an LP-100A). > > All other bands show good power output. > > Any hints? > > 73, phil, K7PEH > __ > 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: Power output low on 30 meter band
Since putting together my K3 two weeks ago I had a chance to try it out on 30 meters today. I tuned up my delta loop to 10 meters and then noticed that the power was low. I thought that maybe my meters were reading funny or something funny about the antenna so I switched over to my Icom 756 Pro III to try the same antenna. It was dead on with a 1.1:1 SWR on the same frequency of 10.106 MHz. And, the meters for the Pro III were reading about 101 watts output (two different meters). So I switched the antenna back to the K3 and checked the SWR and it was about the same, 1.2:1 for the same frequency. But, the power output is only about 65 watts even though the power adjust knob reads 100 watts. I tried different readings and about 55 watts, the external meter power output starts to flatten out compared to the digital readout of the power on the K3 (the external meter is an LP-100A). All other bands show good power output. Any hints? 73, phil, K7PEH __ 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] Interesting KPA100 partial power control loss
Good evening all, K2/100 #5822 started yesterday producing nearly double the requested power. Below 10W fine. 50W requested gave about 100W and max power was approaching 160W on lower bands!! I searched the reflector archive to confirm my memory of posts on the problem over the years. As suggested by Don W3FPR in the past, I replaced D16-17 with 1N4148 diodes to see what happened before delving further, fearing damage to U5 or U6. On reassembly the problem was fixed! I checked the removed 1N5711's with a Peak DCA55 and both appeared normal (low voltage test only I suppose). Have been playing with a kit built Linear Amp Ranger (572B) recently (circuit similar to Ameritron AL-811HD) and I am suspicious that on powering down the heavy toroidal mains transformer may be producing a small 'EMP' since occasionally it freezes up a nearly G4 iMac. The antenna is either disconnected or switched to a dummy load when off- air. No recent thunderstorm activity here - midwinter. Does anyone have any ideas on how to reduce this turn-off spike, in case this is the cause? All gear is fed from UK 240V mains via surge protected power outlets. Meanwhile I will be even more vigilant with antenna disconnection and grounding. 73, Ted G7BQM __ 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] bias for Yamaha CM-500
Gentleman many thanks for sending the PDFs works just fine on my reader, so can continue with the upgrades. thanks again to all .. 73 Merv KH7C Wonder if I could ask a favor of someone on the list, I am installing the upgrade DSP board today and would like to do the IF output mod. the Extreme signal mod, and the VFO noise mod. Does anyone have these PDF downloaded and they can send them to me in an attachment? I have tried several times to download them and get the error that the files are damaged and cannot be repaired, I suspect my Adobe is too old, and my other PDF reader does not seem to read them either. I am on 28.8 dial up so cannot load a new Adobe etc. Appreciate any help.. thanks.. 73 Merv KH7C __ 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] Ask a favor
Wonder if I could ask a favor of someone on the list, I am installing the upgrade DSP board today and would like to do the IF output mod. the Extreme signal mod, and the VFO noise mod. Does anyone have these PDF downloaded and they can send them to me in an attachment? I have tried several times to download them and get the error that the files are damaged and cannot be repaired, I suspect my Adobe is too old, and my other PDF reader does not seem to read them either. I am on 28.8 dial up so cannot load a new Adobe etc. Appreciate any help.. thanks.. 73 Merv KH7C __ 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] F:S K3/100K
the K3 has been spoken for.. ED -- View this message in context: http://n2.nabble.com/F-S-K3-100K-tp4442049p4446210.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] New K3 DSP Board
> "Lyle posted this a while back: > http://www.mail-archive.com/elecraft@mailman.qth.net/msg83487.html describing the changes. Bob NW8L" That refers to the Rev. C. changes current as of last October. Main DSP Board Rev. D now includes a hardware LPF circuit in the audio receive path. Paul, W9AC __ 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] New K3 DSP Board
> "If the new DSP board does not improve the low frequency response in > receive audio unless the bandpass is adjusted as some have suggested, I > wonder what it is intended to do. Is it supposed to improve the low > frequency transmitted audio? What can the new DSP board do that the TX EQ > and RX EQ in the MAIN menu not do? Roy Morris W4WFB" Here's a summary: The Main DSP Board (Rev. D) does three things that are independent of EQ settings and contrary to other opinions, do in fact make measured improvements to Tx and Rx audio response: 1) The new low-pass audio filter in the Rx path attenuates undesirable artifacts above approximately 4 kHz; 2) The headphone low frequency response is improved when using low Z headphone types (e.g., older 4 or 8-ohm) through a 10X increase in coupling capacitor value; and 3) Mic and Line-In low audio response is improved through the re-scaling of several components. Paul, W9AC __ 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] New K3 DSP Board
Lyle posted this a while back: http://www.mail-archive.com/elecraft@mailman.qth.net/msg83487.html describing the changes. Bob NW8L On Sat, Jan 23, 2010 at 7:55 AM, Roy Morris wrote: > If the new DSP board does not improve the low frequency response in receive > audio unless the bandpass is adjusted as some have suggested, I wonder what > it is intended to do. Is it supposed to improve the low frequency > transmitted audio? What can the new DSP board do that the TX EQ and RX EQ in > the MAIN menu not do? Roy Morris W4WFB > __ > 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] K2 Freq. Stability
Thanks to all who helped me work out this problem. I replaced all the BFO components (thanks to Elecraft for sending me the parts at no charge). Now from a cold start at 16C to steady operating temp at 20C, the K2 drifts about 50Hz, well withing spec. In the end, I think the problem was with L33. My original L33 was not wound as carefully as the replacement, and had a couple fewer turns. But who knows. Interestingly, when I reassembled all the BFO components, the K2 did not pass the BFO range test. I reflowed solder, removed L33 and examined it closely, put L33 back in... tried various things to no avail. But then, something I did solved the problem and the oscillator worked fine. Gremlins (or poor soldering). Hope it doesn't revert back to its failed state. Anyway, thanks to all who replied. And, for the record, a properly assembled K2 starting at 16C running up to 20C still meets the published drift specs. I struggled with this problem for quite a while, spent *a lot* of time working it out, and will admit to becoming more than a little frustrated and disillusioned with my K2. But my experience epitomizes the difference between buying and running a stock radio, and building and trouble shooting your own work. If all you want to do is work stations, a K2 is probably not for you; if you enjoy radio more broadly, then the K2 is ideal. Cheers, Doug K8EXB > -Original Message- > From: w3...@embarqmail.com > Sent: Wed, 20 Jan 2010 08:58:47 -0500 > To: d...@inbox.com > Subject: Re: [Elecraft] K2 Freq. Stability > > Doug, > > The BFO is obviously the culprit here. > What serial number is this K2? > Do you have the new L33? with many turns of #36 wire. If this is an > older K2, install the BFO upgrade kit. > If you already have the upgraded parts, then I suggest you equip > yourself with all of the parts in the BFO circuit and just replace > them. You can replace them one at a time until you find things more > stable, but I believe it is easier to replace them wholesale and see > what happens. You will need > 2 BFO crystals X3 and X4 > C173 and C174 > D37 and D38 > L33 > Replacing L33 will require a high value 1/8 watt resistor to mount the > toroid - the K2 lists this as R116 PN E500086. > > 73, > Don W3FPR > > Douglas Furton wrote: >> Hello, all >> >> I've been bothered with the CW tone/filter setting >> on my K2 for some time now. I seem to need to run >> CAL FIL daily, at least to have the BFO freq. read >> into memory. I observe that the CW tone starts low >> and drifts upwards as the rig warms up when I tune a >> signal to the center of the filters (maxing the >> S-meter). >> >> Here is some data characterizing the freq. drift >> in my K2 (#6761). I measured the PLL and BFO freqs >> with a nice frequency counter. I measured these >> shifts with the K2 locked at 7050 kHz, and computed >> the total shift = dPLL - dBFO (all referred back to >> the initial (T=18.5C) measurements. I measured the >> temp. with a thermocouple in contact with the PLL >> thermistor board. I also measured the PLL and BFO >> control voltages at various times and found them >> to be constant. >> >> >> Cumulative freq. Shifts >> TPLL BFO Total >> (C) (Hz)(Hz)(Hz) >> 18.5 0 0 0 >> 19.3 9 -17 26 >> 19.6 13 -34 47 >> 20.2 17 -57 74 >> 20.8 19 -70 89 >> 21.3 24 -79 103 >> 21.6 26 -87 113 >> 22.0 28 -92 120 >> 23.3 37 -124161 >> 24.0 40 -136176 >> 24.5 46 -164210 >> 25.0 53 -205258 >> 25.5 62 -256318 >> 25.5 70 -310380 >> >> (I hope the table above remains tabulated >> properly. Best viewed with a monospace >> font.) >> >> It seems the thermistor board compensates the PLL >> fairly well (although maybe I could tweak RA upwards >> a bit), but the BFO drifts considerably, and >> since the PLL and BFO drift in opposite directions, >> the total drift is exaggerated. >> >> I may measure the drift on a second band, but these >> data are just from 40 m. >> >> I would really like to improve the temp. stability >> of my K2. >> >> Does anyone have any suggestions? >> >> Thanks, >> >> Doug Furton >> K8EXB >> >> >> GET FREE 5GB EMAIL - Check out spam free email with many cool features! >> Visit http://www.inbox.com/email to find out more! >> __ >> 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 >> >> >> >> No virus found in this incoming message. >> Checked by AVG - www.avg.com >> Version: 9.0.730 / Virus Database
[Elecraft] New K3 DSP Board
If the new DSP board does not improve the low frequency response in receive audio unless the bandpass is adjusted as some have suggested, I wonder what it is intended to do. Is it supposed to improve the low frequency transmitted audio? What can the new DSP board do that the TX EQ and RX EQ in the MAIN menu not do? Roy Morris W4WFB __ 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
