[Elecraft] K3 audio speaker jack
I have a BHI noise reduction speaker, this speaker has a cable with a mono plug. (3.5mm, sleeve and tip) I have learned that this plug should not be used with the K3. My question: when I exchange the speaker cable with a stereo plug, should I leave the ring unconnceted or is it better to connect left and right channel (ring and tip) to the BHI speaker? 73! de Werner OE9FWV -- Originality: n., ability to conceal sources Email powered by Pegasus Mail free at http://www.pmail.com Homepage: http://www.qsl.net/oe9fwv/ Fone +43 5522 75013 Fax +43 5522 22505 Mobile +43 664 6340014 Fax-Email Gateway +43 820 220262990 __ 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] Important List Guideline - Keep it Polite, Respectful and Brief
Dag nab it, Eric and all others concerned, in my not so mumbled opinion, the first red bullet* of mailing list etiquette needs to be enforced as a rule, not a suggestion. Brgds, Dave Windisch, N3HE *It's one of two seen on a yellow background today on the reply page. -- View this message in context: http://elecraft.365791.n2.nabble.com/Important-List-Guideline-Keep-it-Polite-Respectful-and-Brief-tp5675702p5677942.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 audio speaker jack
Werner, Just a guess, but most devices like that have a relatively high input impedance - that means you should be able to connect both tip and ring together, bridging both channels of the audio amp in the K3. Check the specs on the speaker - if it states that the input impedance is low, then just connect the tip and the shell. Definitely, change the plug to a stereo plug no matter what else you do - you will stress the audio amp if you short its output. 73, Don W3FPR On 10/27/2010 3:36 AM, Dr. Werner Furlan wrote: I have a BHI noise reduction speaker, this speaker has a cable with a mono plug. (3.5mm, sleeve and tip) I have learned that this plug should not be used with the K3. My question: when I exchange the speaker cable with a stereo plug, should I leave the ring unconnceted or is it better to connect left and right channel (ring and tip) to the BHI speaker? 73! de Werner OE9FWV __ 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] Disappearing VCO error
After the K3 had been running for a few hours yesterday evening, just listening to the bands, it stopped working with ERR PL1 (and PL2). These were genuine hardware errors - neither of the two VFOs would tune and both receivers were dead. Attempts to re-calibrate the VCOs ended with ERR VCO and ERR VC4. I switched off and left the problem overnight, and this morning both VCOs calibrated successfully with no further errors so far. (A notable difference was the successful calibrations took much longer over some of the steps. The failed attempts had rattled through all the steps at the same high speed.) The firmware was MCU 4.12 / DSP 2.60 / FPF 1.13. After everything was working correctly again, I have updated to MCU 4.14. Hardware is K3/100 #724, with KAT3, KRX3, KXV3 and all modifications to date. The question is: why did this happen? And with CQWW SSB coming up, could it happen again? -- 73 from Ian GM3SEK http://www.ifwtech.co.uk/g3sek __ 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 audio speaker jack
Please leave the ring unconnected. If you conenct them, then you will be shorting the two audio channels of the K3 together. 73, Lyle KK7P My question: when I exchange the speaker cable with a stereo plug, should I leave the ring unconnceted or is it better to connect left and right channel (ring and tip) to the BHI speaker? __ 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 Rf gain tracking (main vs. sub)
Joe, Yes, I've been in touch with Lyle; he is trying to understand this issue and resolve it, for which I am very grateful. Perhaps the solution will illuminate why some observe this behavior and some do not. Where else but Elecraft can one find such truly outstanding support? - 73, Stan - KR7C -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Rf-gain-tracking-main-vs-sub-tp5668917p5678456.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] KSYN3 board , free tech special!
The KSYN3 board has a new home. Thanks! Allan K7GT On Tue, Oct 26, 2010 at 9:33 PM, Allan Taylor k7gt...@gmail.com wrote: I have an early KSYN3 board available to anyone interested. It deteriorated and finally had to be replaced. Any takers?? from S/N 740. -- 73 Allan K7GT -- 73 Allan K7GT __ 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 audio speaker jack
thank you to all who responded, I am using a stereo plug now and I left the ring unconnected. A short test revealed no difference in loudness or sound when I shorted both channels with only the MAIN RX, but a decrease in loudness when the SUB RX is activated, which is not what I would like to see. 73! de Werner OE9FWV -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-audio-speaker-jack-tp5677596p5678714.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] APF For K3: progress report
Yes, Ron, I also prefer wide bandpass for CW most of the time. Still, it would be very nice indeed on those infrequent occasions to not have to do the RIT/SHIFT mambo when using a narrow filter... Actually, even with my typical wide open filter I think I'd use a live-signal pitch control quite often, not having to necessarilly bother with RIT or split VFOs. Seems like a natural that CW signal pitch would be a parameter that should have a dedicated control; but instead it takes several steps to accomplish. Sorry about derailing the APF topic; I think I lost track of how that was going to be implemented on the K3, but I'm looking forward to it in any case. 73, Drew AF2Z On Tue, 26 Oct 2010 08:53:08 -0700, Ron AC7AC wrote: He wants to vary the pitch without moving the signal in the bandpass, Don. That's a non-issue using a wide bandpass and one of the reasons I don't use narrow filters except on rare occasions when absolutely necessary. With a wide pass band I can just move the VFO (I'm *always* in SPLIT mode so TX stays on frequency.) Like Drew, I often shift the tone of the signal as I'm copying based on the nature of the noise, but it's not practical to do with a very sharp filter when straining to make out a weak signal. Losing the signal at all while juggling SHIFT means missing characters and hunting for it again with uncertain results. Ron AC7AC -Original Message- __ 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] N2CQ QRP Contest Calendar: Oct 30/31 - Nov, 2010
~ N2CQ QRP CONTEST CALENDAR October 30/31 - November 2010 ~ CQ WW DX Contest (SSB) ... QRP Category Oct 30, z to Oct 31, 2359z Rules: http://www.cqww.com/index.html ~ Ten-Ten QSO Party (Digital) ... QRP Category Oct 30, 0001z to Oct 31, 2359z Rules: http://www.ten-ten.org/Forms/QSOPartyRules_082710.pdf ~ HA-QRP Contest (CW - 80 Meters) *** QRP Contest*** Nov 1, z to Nov 7, 2400z Rules: http://www.radiovilag.hu/haqrp2.htm ~ Adventure Radio Spartan Sprint (CW) *** QRP Event! *** Nov 2, 0100z to 0300z (First Monday 9 PM EDT) Rules: http://adventure-radio.org/wiki/index.php?title=Main_Page ~ 80 METER FOXHUNT (CW) *** QRP Contest *** Each Tuesday Thru Mar 15 9 PM to 10:29 PM Eastern Time USA Info: http://www.qrpfoxhunt.org/ ~ 40 METER FOXHUNT (CW) *** QRP Contest *** Each Thursday Thru March 17 9 PM to 10:29 PM Eastern Time USA Info: http://www.qrpfoxhunt.org/ ~ Ukrainian DX Contest (CW/SSB) ... QRP Category Nov 6, 1200z to Nov 7, 1200z Rules: http://www.ucc.zp.ua/urdxc2010rules_eng.htm ~ ARRL Sweepstakes (CW) ... QRP Category Nov 6, 2100z to Nov 8, 0259z Rules: http://www.arrl.org/sweepstakes ~ NA Collegiate ARC Championship (CW) .. QRP Category Nov 6, 2100z to Nov 8, 0259z Rules: http://www.collegiatechampionship.org/rules/ ~ Daylight Savings Time Ends Nov 7, 0200 AM ~ High Speed Club Contest (CW) ... QRP Category Nov 7, 0900z to 1100z and 1500z to 1700z Rules: http://www.fmcnet.de/hsc/en/contests.html ~ CWops Mini-CWT Test (CW) ... QRP Category Nov 10, 1100z to 1200z and Nov 10, 1900z to 2000z and Nov 11, 0300z to 0400z Rules: http://www.cwops.org/onair.html ~ WAE RTTY Contest ... 100W Category Nov 13, z to Nov 14, 2359z Rules: http://www.darc.de/referate/dx/contest/waedc/en/rules/ ~ Japan International DX Contest (phone)... 100w category Nov 13, 0700z to Nov 14, 1300z Rules: http://jidx.org/jidxrule-e.html ~ OK/OM DX Contest (CW) ... QRP Category! Nov 13, 1200z to Nov 14, 1200z Rules: http://okomdx.crk.cz/g.html ~ Kentucky QSO Party (CW/Ph) Nov 13, 1400z to Nov 14, 0200z Rules: http://www.wkdxa.com ~ SKCC Weekend Sprintathon (Straight Key CW) ... QRP Category Nov 14, z to 2359z Rules: http://www.skccgroup.com/sprint/wes/ ~ NAQCC Straight Key/Bug Sprint *** QRP CONTEST! *** EST: Nov 17, 8:30 PM to 10:30 PM UTC: Nov 18, 0130z to 0330z Rules: http://home.windstream.net/yoel/contests.html ~ YO International PSK31 Contest (80 Meters) ... 50W max Nov 19, 1600z to 2200z Rules: http://www.yo5crq.ro/Rules.htm ~ LZ DX CONTEST (CW/SSB) ... QRP Category Nov 20, 1200z to Nov 21, 1200z Rules: http://lzdx.bfra.org/rulesen.html ~ Feld Hell Club Sprint (Feld Hell) ... QRP Category Nov 20, 1600z to 1800z Rules: http://sites.google.com/site/feldhellclub/Home ~ ARRL Sweepstakes (Phone) ... QRP Category Nov 20, 2100z to Nov 22, 0259z Rules: http://www.arrl.org/sweepstakes ~ NA Collegiate ARC Championship (Phone) .. QRP Category Nov 20, 2100z to Nov 22, 0259z Rules: http://www.collegiatechampionship.org/rules/ ~ European PSK Club - PSK63 QSO Party ... 100W. Max Nov 21, z to 2400z Rules: http://www.eu.srars.org/ ~ Homebrew OldTime (HOT) Equipment Party ... QRP Category Nov 21, 1300z to 1700z Rules: http://www.qrpcc.de/contestrules/hotr.html ~ RUN FOR THE BACON (CW) *** QRP CONTEST *** EST: Nov 21, 9 PM to 11 PM UTC: Nov 22, 0200z to 0400z Rules: http://www.fpqrp.com/
[Elecraft] K3 APF (audio peaking filter) progress report #2
We now have our basic APF function in place, and I'm amazed at how well it works. Lyle (KK7P, our DSP guy) surprised even himself :) It improves signal to noise ratio significantly, as evaluated both by measurement (S+N/N increase of ~3 to 5 dB using the K3's built-in dBV meter) and by ear (makes many weak signals buried in noise easier to copy). Because we're using DSP, we've been able to improve on analog implementations by providing constant gain over the full pitch range and ideal passband characteristics. One explanation for why APF improves copy is that it is *not* a brick- wall filter: it has a narrow peak, but the skirts are very broad, leading to a more natural sound. It has fewer of the artifacts you get with a really narrow filter. To borrow terminology from our existing DUAL PB function, the K3's first and second I.F. filters provide the context bandwidth (along with a very high level of ultimate attenuation), while APF provides the focus. The combination of the two sometimes works better than brick-wall filters at an equivalent narrow bandwidth, at least in some QRN/QRM scenarios. For example, I was listening to 40 meters last night with S5 background noise. Copy on many signals was better with WIDTH=400 and APF on, than with WIDTH set to 100 or 50 Hz and APF OFF. Many of you sent suggestions for how APF should be turned on and controlled (thanks). We're weighing various alternatives. 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 APF (audio peaking filter) progress report #2 -- clarification
I wrote: [the APF] has fewer of the artifacts that you get with a really narrow filter. Instead of really narrow I should have said higher-order, i.e. a filter with the equivalent of many cascaded sections. The APF is a very low-order filter in comparison to the K3's normal audio DSP filters. 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 audio speaker jack
Incorrect. The adapter combines both channels into one. Nothing is shorted to ground. - Original Message - From: Ken Kopp k...@rfwave.net To: k igor k.i...@comcast.net, elecraft@mailman.qth.net Sent: Wednesday, October 27, 2010 12:48:57 PM Subject: Re: [Elecraft] K3 audio speaker jack The RS adapter will merely move the point where the short occurs. The one channel of the stereo adapter will still be shorted by the mono plugs on the speaker/s. 73! Ken Kopp - K0PP elecraftcov...@rfwave.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: audio speaker jack adapter
Sure, suite yourself. I happened to see soldering job done by some radio amateures, especially on a wires that are not really suitable for hand soldering (like cheap headphones). For most of them, adapte r is the way to go, just safer. If you plug it once and leave it be on back side of the rig, it will not be potentially intermittent. - Original Message - From: Ralph Parker ve...@dccnet.com To: Elecraft@mailman.qth.net Sent: Wednesday, October 27, 2010 12:54:52 PM Subject: [Elecraft] K3: audio speaker jack adapter If you don't want to mess with soldering, Radioshack sells stereo-mono adapter I'd solder on a connector any day. I don't want the potential intermittent connection of a poorly made adapter. Maybe you don't either. Not to mention the mechanical stress on the jack from a bunch of weighty connectors. The fewer connections between A and B, the better. VE7XF __ 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] Stuff for sale
Cleaning out my radio shack. The following stuff for sale. 1. Heil PROLINE Gold mike with Heil stand. $100.00 obo + shipping. 2. Astron SS-30m 30 amp power supply, with meters. $90.00 obo + shipping. 3. Buddipole. With a long whip, in place of short and an isolator. The Deluxe set with bag. $225.00 obo + shipping. 4. MFJ artificial ground MFJ-931 $50.00 obo + shipping. 5. NCG 2050 SWR Power meter 1.6-60Mhz. $35.00 obo + shipping. All items are excellent cond. The Mic. comes with a Kenwood/K3 cord. The Astron with power cord and box. The MFJ-931 comes with box and instructions. __ 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 audio speaker jack
Right, but the low impedance output of one channel is loaded by the low impedance output of the other channel. Not good. Incorrect. The adapter combines both channels into one. Nothing is shorted to ground. __ 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 audio speaker jack
Incorrect. The adapter combines both channels into one. No, the Radio Shack adapter shorts the outputs of the audio amplifier to each other with no build out resistor. That can damage for the amplifier chip - the LM4950 is not spec'd for parallel operation. As Wayne has already stated, do not connect the tip/ring together. 73, ... Joe, W4TV On 10/27/2010 2:31 PM, k.i...@comcast.net wrote: Incorrect. The adapter combines both channels into one. Nothing is shorted to ground. - Original Message - From: Ken Koppk...@rfwave.net To: k igork.i...@comcast.net, elecraft@mailman.qth.net Sent: Wednesday, October 27, 2010 12:48:57 PM Subject: Re: [Elecraft] K3 audio speaker jack The RS adapter will merely move the point where the short occurs. The one channel of the stereo adapter will still be shorted by the mono plugs on the speaker/s. 73! Ken Kopp - K0PP elecraftcov...@rfwave.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 __ 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 audio speaker jack
All, Ok then, so the optimal solution then would be to build a stereo to mono adapter where one side of the stereo audio and the ground would get wired to a mono jack (pick your size)tip and ring for use by the mono speaker, and the other audio channel from the stereo connector would be connected to ground via an 8 ohm, 2W resistor. In that manner, all parts of the audio amplifier are properly terminated. 73 Gene K1NR K2 6Kxx On Wed, 27 Oct 2010 16:48:57 - Ken Kopp k...@rfwave.net wrote: The RS adapter will merely move the point where the short occurs. The one channel of the stereo adapter will still be shorted by the mono plugs on the speaker/s. 73! Ken Kopp - K0PP elecraftcov...@rfwave.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 - Web mail provided by NuNet, Inc. The Premier National provider. http://www.nni.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 audio speaker jack
Shorting the outputs of the audio channels together MAY not blow anything up, but it puts the output of one channel as the load of another. Translate: distortion. Do NOT use the RS adapter. 73, Guy. On Wed, Oct 27, 2010 at 3:22 PM, Joe Subich, W4TV li...@subich.com wrote: Incorrect. The adapter combines both channels into one. No, the Radio Shack adapter shorts the outputs of the audio amplifier to each other with no build out resistor. That can damage for the amplifier chip - the LM4950 is not spec'd for parallel operation. As Wayne has already stated, do not connect the tip/ring together. 73, ... Joe, W4TV On 10/27/2010 2:31 PM, k.i...@comcast.net wrote: Incorrect. The adapter combines both channels into one. Nothing is shorted to ground. - Original Message - From: Ken Koppk...@rfwave.net To: k igork.i...@comcast.net, elecraft@mailman.qth.net Sent: Wednesday, October 27, 2010 12:48:57 PM Subject: Re: [Elecraft] K3 audio speaker jack The RS adapter will merely move the point where the short occurs. The one channel of the stereo adapter will still be shorted by the mono plugs on the speaker/s. 73! Ken Kopp - K0PP elecraftcov...@rfwave.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 __ 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 APF (audio peaking filter) progress report #2
Goes without saying that a lot of us would love to have this for SS CW and especially CQWWDX CW, even if it's only a field test. 73, Guy. On Wed, Oct 27, 2010 at 1:47 PM, Wayne Burdick n...@elecraft.com wrote: We now have our basic APF function in place, and I'm amazed at how well it works. Lyle (KK7P, our DSP guy) surprised even himself :) It improves signal to noise ratio significantly, as evaluated both by measurement (S+N/N increase of ~3 to 5 dB using the K3's built-in dBV meter) and by ear (makes many weak signals buried in noise easier to copy). Because we're using DSP, we've been able to improve on analog implementations by providing constant gain over the full pitch range and ideal passband characteristics. One explanation for why APF improves copy is that it is *not* a brick- wall filter: it has a narrow peak, but the skirts are very broad, leading to a more natural sound. It has fewer of the artifacts you get with a really narrow filter. To borrow terminology from our existing DUAL PB function, the K3's first and second I.F. filters provide the context bandwidth (along with a very high level of ultimate attenuation), while APF provides the focus. The combination of the two sometimes works better than brick-wall filters at an equivalent narrow bandwidth, at least in some QRN/QRM scenarios. For example, I was listening to 40 meters last night with S5 background noise. Copy on many signals was better with WIDTH=400 and APF on, than with WIDTH set to 100 or 50 Hz and APF OFF. Many of you sent suggestions for how APF should be turned on and controlled (thanks). We're weighing various alternatives. 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 __ 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 APF (audio peaking filter) progress report #2
Working on that Wayne On Oct 27, 2010, at 12:41 PM, Guy Olinger K2AV wrote: Goes without saying that a lot of us would love to have this for SS CW and especially CQWWDX CW, even if it's only a field test. __ 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] APF For K3
I do not believe you want to change the tone of the received CW signal. If the SPOT button is used to turn on APF, the spot tone should be turned off for APF. You should be able to tune across his signal at his frequency and peak his signal. That is what APF is supposed to do. Please do not try to convert his signal to your spot tone. 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
Re: [Elecraft] K3 APF (audio peaking filter) progress report #2
One explanation for why APF improves copy is that it is *not* a brick- wall filter: it has a narrow peak, but the skirts are very broad, leading to a more natural sound. And the reason why some of us have been stating that roofing filters and brick-wall DSP filters, as good as they are for their intended purpose, cannot equate to the results obtained by the APF. Wayne, any idea as to the Q of the equivalent DSP filter? One typical aspect of the simple APF circuit as used in the FT-1000/D is that Q changes as F changes. More sophisticated parametric circuits keep Q relatively constant regardless of F. Perhaps Lyle's implementation in DSP preserves Q as F is changed? I believe the FT-1000/D's APF had a minimum Q of 10 at the lowest F setting, then progressively increased to about 30 at the highest setting. 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] K3 APF (audio peaking filter) progress report #2
I'm wondering if the sidetone could be routed through the APF? Using a simple audio filter makes the sidetone sound sharper and cleaner and somehow improves my sending ability. N4LQ Steve - Original Message - From: Wayne Burdick n...@elecraft.com To: Guy Olinger K2AV olin...@bellsouth.net Cc: Elecraft Reflector elecraft@mailman.qth.net Sent: Wednesday, October 27, 2010 3:47 PM Subject: Re: [Elecraft] K3 APF (audio peaking filter) progress report #2 Working on that Wayne On Oct 27, 2010, at 12:41 PM, Guy Olinger K2AV wrote: Goes without saying that a lot of us would love to have this for SS CW and especially CQWWDX CW, even if it's only a field test. __ 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 APF (audio peaking filter) progress report #2
Paul, The Yaesu hardware-based APF design resulted in essentially constant bandwidth of about 30 Hz (6 dB points) and a peaking gain from 7.5 dB to 10 dB depending on its peaking frequency (200 Hz to 1 kHz). The present K3 APF we're testing has a constant bandwidth of 30 Hz at the 6 dB points and constant 9 dB of peaking gain. It is an IIR filter, closely mimicking a hardware approach. 73, Lyle KK7P I believe the FT-1000/D's APF had a minimum Q of 10 at the lowest F setting, then progressively increased to about 30 at the highest setting. __ 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 audio speaker jack
The radio shack adapter #274-375 does not short them. It separates the 1/8 Stereo plug into two 1/8 mono jacks. Plugging into the channel of interest should be fine. The catalog states, Use to separate left and right channel signals. 73, Bob K2TK On Wed, 27 Oct 2010 16:48:57 - Ken Koppk...@rfwave.net wrote: The RS adapter will merely move the point where the short occurs. The one channel of the stereo adapter will still be shorted by the mono plugs on the speaker/s. 73! Ken Kopp - K0PP elecraftcov...@rfwave.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
[Elecraft] [K3] Can a stereo phone plug be used with external keyer?
Setting up K3 for CW keying from logging program. Can a stereo phone plug be used in the KEY jack? Already have cable wired this way from previous radio. Tnx, Barry W2UP -- Barry Kutner, W2UP Lakewood, CO __ 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 audio speaker jack
Shorting the outputs of the audio channels together MAY not blow anything up, *May* is the operative word. If one has the sub RX on with audio balance fully to one side and audio turned toward the maximum driving relatively high impedance speakers, the amplifier *can* be damaged. Since the amplifier is fragile enough and it is located on the DSP board (difficult to access and replace), connecting the left/right channels in parallel is an extremely bad idea. 73, ... Joe, W4TV On 10/27/2010 3:28 PM, Guy Olinger K2AV wrote: Shorting the outputs of the audio channels together MAY not blow anything up, but it puts the output of one channel as the load of another. Translate: distortion. Do NOT use the RS adapter. 73, Guy. On Wed, Oct 27, 2010 at 3:22 PM, Joe Subich, W4TVli...@subich.com wrote: Incorrect. The adapter combines both channels into one. No, the Radio Shack adapter shorts the outputs of the audio amplifier to each other with no build out resistor. That can damage for the amplifier chip - the LM4950 is not spec'd for parallel operation. As Wayne has already stated, do not connect the tip/ring together. 73, ... Joe, W4TV On 10/27/2010 2:31 PM, k.i...@comcast.net wrote: Incorrect. The adapter combines both channels into one. Nothing is shorted to ground. - Original Message - From: Ken Koppk...@rfwave.net To: k igork.i...@comcast.net, elecraft@mailman.qth.net Sent: Wednesday, October 27, 2010 12:48:57 PM Subject: Re: [Elecraft] K3 audio speaker jack The RS adapter will merely move the point where the short occurs. The one channel of the stereo adapter will still be shorted by the mono plugs on the speaker/s. 73! Ken Kopp - K0PP elecraftcov...@rfwave.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 __ 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 APF (audio peaking filter) progress report #2
The Smiths: Routing the sidetone through a filter resonant at the sidetone's pitch always cleans up the waveform and improves articulation. The filter must not be so narrow as to cause ringing however. The K3's sidetone is quiet clean but external audio filtering indeed improves the quality of the note which helps, at least this cw op, send faster with fewer errors. I suppose it could be considered psychoacoustic but it works. N4LQ Steve - Original Message - From: The Smiths To: n...@carolina.rr.com Sent: Wednesday, October 27, 2010 4:22 PM Subject: RE: [Elecraft] K3 APF (audio peaking filter) progress report #2 Steve, Maybe I'm missing something here, or you are...but the APF has NOTHING to do with sending... It has NOTHING to do with SPOTTING someone, it has NOTHING to do with TONE even, it has to do with Peaking a signal within your current IF passband area regardless of where the IF SHIFT is set, regardless of where your PITCH or TONE is set.. None of these have anything to do with an Audio Peaking FILTER... The on/off button is going to be the Dual PB button.. since that has to do with Filters. From: n...@carolina.rr.com To: n...@elecraft.com; olin...@bellsouth.net Date: Wed, 27 Oct 2010 16:17:10 -0400 CC: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 APF (audio peaking filter) progress report #2 I'm wondering if the sidetone could be routed through the APF? Using a simple audio filter makes the sidetone sound sharper and cleaner and somehow improves my sending ability. N4LQ Steve - Original Message - From: Wayne Burdick n...@elecraft.com To: Guy Olinger K2AV olin...@bellsouth.net Cc: Elecraft Reflector elecraft@mailman.qth.net Sent: Wednesday, October 27, 2010 3:47 PM Subject: Re: [Elecraft] K3 APF (audio peaking filter) progress report #2 Working on that Wayne On Oct 27, 2010, at 12:41 PM, Guy Olinger K2AV wrote: Goes without saying that a lot of us would love to have this for SS CW and especially CQWWDX CW, even if it's only a field test. __ 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] APF For K3
Here is an operational scenario: You are CQing in the CQ WW CW contest. There are other loud stations CQing on either side of you. You have adjusted your SHIFT and WIDTH controls to eliminate the adjacent-channel interference while still, you hope, being wide enough to catch anyone calling you. A weak station replies to your CQ, but he's some distance off your frequency, although still within your bandpass. You'd like to be able to put an audio peaking filter on his signal without affecting the rest of your setup. You don't want to change your sidetone pitch; that's a separate question for a separate discussion. You don't want to use RIT or CWT, because that will bring one of the adjacent loud signals into your bandpass. Anyway, the desired signal is too weak to trigger CWT. Likewise, you don't want to shift your main DSP filter bandpass (the context); you've got this set up for where you are and you don't want to change it just for this one 30-second QSO. If you didn't have an APF, you might try narrowing the DSP filter bandwidth, but he's far enough off-frequency that doing so would run the risk of losing his signal, meaning you would have to fiddle with both SHIFT and WIDTH to home in on him, and that takes time to do, plus more time to restore them after the QSO. What you would really like to be able to do is to adjust an audio peak filter's frequency so that it is on top of the received weak signal, but without affecting the context (your DSP shift and width, your sidetone pitch, or your transmit frequency - these should all stay where they were). My suggestion would be to use one of the buttons (DUAL PB seems to be a possible candidate here) to turn the APF feature on, and while the feature is on, the SHIFT and WIDTH controls would adjust the APF frequency and width (or Q) and would have no effect on the context filtering. RIT and SPLIT would still work normally, it's just SHIFT and WIDTH that would have been subverted to do the APF adjustments while the APF is on. If you really did want to adjust the context filter width or shift, you would have to turn APF back off to do so. Once the QSO with the weak station had been successfully concluded, you could either turn APF off, or else leave it on with its width adjusted to include the entire context bandpass, and carry on CQing. My 2c worth. 73, Rich VE3KI __ 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 APF (audio peaking filter) progress report #2
On Oct 27, 2010, at 1:06 PM, Paul Christensen wrote: And the reason why some of us have been stating that roofing filters and brick-wall DSP filters, as good as they are for their intended purpose, cannot equate to the results obtained by the APF. Indeed. If you squint a little at the Yaesu APF filter shapes, the skirts fall off with a more or less 1/f shape -- perhaps coincidentally, the spectral envelope of a periodic On-Off Keyed signal follows a 1/f profile. In a sense, that is what a matched filter does in the signal processing world -- and we know that matched filters, in the absence of QRM, optimizes SNR in an AWGN channel. Although I won't go as far as extend linear matched filter theory to the highly non-linear ear-brain system, it still raised my curiosity when I first saw the Yaesu filter plots which someone kindly posted earlier. When there is strong adjacent QRM though, you may still have to roof the APF with a filter that has more abrupt skirt -- similar problem exists with matched filters for RTTY: they are great for pulling signals out of the noise. But you need to engage a more abrupt filter when QRM creeps closer in. 73 Chen, W7AY __ 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] P3 tutorial
There's a new version of the P3 Owner's manual that has just been posted to the Elecraft web site: http://www.elecraft.com/K2_Manual_Download_Page.htm It includes a new three-page section starting on page 17, How to Set Up and Interpret the P3 Display, that serves as a short tutorial on some of the subtleties of how to use a panadapter. It answers many of the questions that have come up on these email reflectors since we started shipping three months ago. Alan N1AL __ 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] APF suggestions
In CW, I would suggest that the currently non functional LO-CUT-HI function and settings be used to control APF, where SHIFT moves the peak around in the passband, temporarily showing the frequency of the peak, and WIDTH sets the depth of the falloff, temporarily showing the depth of the APC in dB at width setting of current DSP skirts. LO-CUT-HI are only non-functional if PB CTRL - Shift=.01. That is not a good place for APF. A better solution would be to overload CMP since it is not used in CW but the CMP control is not convenient for right handed operatorsdue to VFO A. My preference would be to overload DATA MD (AFX Hold) to select APF and use the VFO B (or RIT/XIT) encoder for setting peak frequency. Behavior could be like the manual notch ... a hold would turn on APF and enable frequency control; a tap would release the encoder for its normal use. A subsequent tap with APF enabled would turn APF off while a subsequent hold while APF was enabled would reengage the encoder. 73, ... Joe, W4TV On 10/26/2010 2:53 PM, Guy Olinger K2AV wrote: After gnoshing on this for a while and listening to various posts on using this, I would sure hope that one usage pattern does not have to preclude another. I suggest the following: In CW, I would suggest that DUAL PB turns APF on and off. In CW, I would suggest that the currently non functional LO-CUT-HI function and settings be used to control APF, where SHIFT moves the peak around in the passband, temporarily showing the frequency of the peak, and WIDTH sets the depth of the falloff, temporarily showing the depth of the APC in dB at width setting of current DSP skirts. APF comes on with peak at spot pitch. Resetting RIT via program or RIT CLR should also reset APF peak to spot pitch. Perhaps with config menu options APF RESET with rit or none values = I find it difficult to use RIT to move a very weak station down to the audio peak point in the passband because there is no calibration of my twist of the knob to the rate of change of the station. If he stops transmitting or fades, I can't continue. I may tune PAST him. If I am moving the peak while the incoming frequencies remain constant, I have both the remembered constant tone of the station and the moving tonal center of the peak to compare, so I can center the peak on the station, even if he has stopped transmitting or faded. In a contest operation, having the peak at the same place as the transmitted signal is what is normally needed, and the same way RIT is canceled after a QSO, an APF peak moved up or down needs to be returned to center, so an RIT CLR, button or command, should also return the APF to the spot pitch. Using SHIFT control with light under SHIFT should NOT move APF peak. I sometimes deliberately run a skewed passband rather than move TX frequency when someone trys to put one more frequency in there than will really fit. If I move, I just encourage him, and he will move with me because he's just as bad off on the other side. So I just use SHIFT and WIDTH together to bring in THAT skirt without moving the other. That being the case, I do NOT want the APF peak to have moved. Even though the front panel would not reflect the presence of CW APF, those who really need it and use it will get used to it, and it will get out as yet another great feature slipped in on the firmware. You can make some front panel silk screen adjustment in the future on new K3's. 73, Guy __ 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] Disappearing VCO error
I experienced a very similar problem this morning. ERR PL1 and PL2 starting popping up. Then some other errors. It happened intermittently. I was running 4.12 and then loaded the latest firmware. The errors have continued. I have an email into Elecraft support and hope for a quick solution. A new TS 590S is sitting in the K-3 position for the time. It's an interesting rig. 73, Gary W7TEA K3 #1001 - 73, Gary W7TEA K3 #1001 -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Disappearing-VCO-error-tp5678388p5680370.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 audio speaker jack
Beware of some of these stereo to mono adapters - either obtain a clear picture of which is connected to what (also known as a schematic), or check out the connections with your ohmmeter. I have encountered some that were not what they appeared to be in the header description of the adapter. Not all are that way, but I have found some that were not as expected. 73, Don W3FPR On 10/27/2010 12:40 PM, k.i...@comcast.net wrote: If you don't want to mess with soldering, Radioshack sells stereo-mono adapter (part number 274-374). __ 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 audio speaker jack
The easy solution (just as Werner said he did) is to change the plug to a stereo plug and wire only the tip and the shell. Problem solved. 73, Don W3FPR On 10/27/2010 3:26 PM, Eugene Balinski wrote: All, Ok then, so the optimal solution then would be to build a stereo to mono adapter where one side of the stereo audio and the ground would get wired to a mono jack (pick your size)tip and ring for use by the mono speaker, and the other audio channel from the stereo connector would be connected to ground via an 8 ohm, 2W resistor. In that manner, all parts of the audio amplifier are properly terminated. 73 Gene K1NR K2 6Kxx __ 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] QST
In December issue of QST the FTDX5000 is tested. István Szabó __ 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] APF For K3
Rich, that was VERY well put. Even a dummy like me could understand that clearly. I think as much as your idea of the Q being on the Width control is a good one, I may actually rather put that Q setting in the Config menu. I don't see adjusting the Q as often as I would the Frequency of the APF as you described. One reason that the Shift knob is the best candidate is be because it seems that just like when you put the Dual PB filter on, the Shift is centered you are unable to adjust it, it will be the same with the APF on (or at least this is my understanding at this point). So it really wouldn't make any difference regardless. I much prefer to keep the Width control active, because I can see that I'll probably end up using that APF on almost all of the time. In that case I want to be able to still operate my Width at any given time without turning on and off my APF to do so. If it is the case where the Shift doesn't work when the APF is on, than it would be nice if in the future the Shift would retain it's setting until the operator turns off the APF and readjusts it. Date: Wed, 27 Oct 2010 16:54:34 -0400 From: ve3...@storm.ca To: elecraft@mailman.qth.net Subject: Re: [Elecraft] APF For K3 Here is an operational scenario: You are CQing in the CQ WW CW contest. There are other loud stations CQing on either side of you. You have adjusted your SHIFT and WIDTH controls to eliminate the adjacent-channel interference while still, you hope, being wide enough to catch anyone calling you. A weak station replies to your CQ, but he's some distance off your frequency, although still within your bandpass. You'd like to be able to put an audio peaking filter on his signal without affecting the rest of your setup. You don't want to change your sidetone pitch; that's a separate question for a separate discussion. You don't want to use RIT or CWT, because that will bring one of the adjacent loud signals into your bandpass. Anyway, the desired signal is too weak to trigger CWT. Likewise, you don't want to shift your main DSP filter bandpass (the context); you've got this set up for where you are and you don't want to change it just for this one 30-second QSO. If you didn't have an APF, you might try narrowing the DSP filter bandwidth, but he's far enough off-frequency that doing so would run the risk of losing his signal, meaning you would have to fiddle with both SHIFT and WIDTH to home in on him, and that takes time to do, plus more time to restore them after the QSO. What you would really like to be able to do is to adjust an audio peak filter's frequency so that it is on top of the received weak signal, but without affecting the context (your DSP shift and width, your sidetone pitch, or your transmit frequency - these should all stay where they were). My suggestion would be to use one of the buttons (DUAL PB seems to be a possible candidate here) to turn the APF feature on, and while the feature is on, the SHIFT and WIDTH controls would adjust the APF frequency and width (or Q) and would have no effect on the context filtering. RIT and SPLIT would still work normally, it's just SHIFT and WIDTH that would have been subverted to do the APF adjustments while the APF is on. If you really did want to adjust the context filter width or shift, you would have to turn APF back off to do so. Once the QSO with the weak station had been successfully concluded, you could either turn APF off, or else leave it on with its width adjusted to include the entire context bandpass, and carry on CQing. My 2c worth. 73, Rich VE3KI __ 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_K3] P3 tutorial
Thanks for the updated manual, as always excellent from team Elecraft. OT,,, I wonder how in heck those commercial broadcasters get such steep sides on their transmitted signal. I have also observed local AM stations with brick wall waveforms on my P3. 73 Dale, k9vuj On 27, Oct 2010, at 16:29, Alan Bloom wrote: There's a new version of the P3 Owner's manual that has just been posted to the Elecraft web site: http://www.elecraft.com/K2_Manual_Download_Page.htm It includes a new three-page section starting on page 17, How to Set Up and Interpret the P3 Display, that serves as a short tutorial on some of the subtleties of how to use a panadapter. It answers many of the questions that have come up on these email reflectors since we started shipping three months ago. Alan N1AL Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Elecraft_K3/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/Elecraft_K3/join (Yahoo! ID required) * To change settings via email: elecraft_k3-dig...@yahoogroups.com elecraft_k3-fullfeatu...@yahoogroups.com * To unsubscribe from this group, send an email to: elecraft_k3-unsubscr...@yahoogroups.com * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/ __ 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] Can a stereo phone plug be used with external keyer?
So long as the keying line is connected to the tip (not the ring), sure... the ring wouldn't be connected to anything. ~Iain / N6ML On Wed, Oct 27, 2010 at 8:49 PM, Barry w...@comcast.net wrote: Setting up K3 for CW keying from logging program. Can a stereo phone plug be used in the KEY jack? Already have cable wired this way from previous radio. Tnx, Barry W2UP -- Barry Kutner, W2UP Lakewood, CO __ 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] Nearfield monitors
Wondering if anyone is using near-field monitors with 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
Re: [Elecraft] Nearfield monitors
I have some NS10 Yamaha's and some Tanoy monitors that I've used with my K3, the NS10's drive a little better but are a bit flat for SSB, and a little to crisp for CW. The Tanoy's are too muffly with everything.. I find that the cheaper the speakers are the better they sound with HAM equipment. Don't get fancy with your nearfields. From: kc9...@aol.com To: elecraft@mailman.qth.net Date: Wed, 27 Oct 2010 17:26:51 -0500 Subject: [Elecraft] Nearfield monitors Wondering if anyone is using near-field monitors with 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 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] APF For K3
I know it's hard to please everyone in a situation like this but, as a blind CW op, I'm fervently voting for APF not to be put on a menu. This is an addition I eagerly anticipate and expect to use a lot. I know we blind ops are a distinct minority here but, currently, we don't have access to the menus. Putting it on a front panel control would put it in our hands. Thanks. lou WA3MIX - Original Message - From: The Smiths notforc...@hotmail.com To: ve3...@storm.ca; Elecraft Reflector elecraft@mailman.qth.net Sent: Wednesday, October 27, 2010 6:07 PM Subject: Re: [Elecraft] APF For K3 Rich, that was VERY well put. Even a dummy like me could understand that clearly. I think as much as your idea of the Q being on the Width control is a good one, I may actually rather put that Q setting in the Config menu. I don't see adjusting the Q as often as I would the Frequency of the APF as you described. One reason that the Shift knob is the best candidate is be because it seems that just like when you put the Dual PB filter on, the Shift is centered you are unable to adjust it, it will be the same with the APF on (or at least this is my understanding at this point). So it really wouldn't make any difference regardless. I much prefer to keep the Width control active, because I can see that I'll probably end up using that APF on almost all of the time. In that case I want to be able to still operate my Width at any given time without turning on and off my APF to do so. If it is the case where the Shift doesn't work when the APF is on, than it would be nice if in the future the Shift would retain it's setting until the operator turns off the APF and readjusts it. Date: Wed, 27 Oct 2010 16:54:34 -0400 From: ve3...@storm.ca To: elecraft@mailman.qth.net Subject: Re: [Elecraft] APF For K3 Here is an operational scenario: You are CQing in the CQ WW CW contest. There are other loud stations CQing on either side of you. You have adjusted your SHIFT and WIDTH controls to eliminate the adjacent-channel interference while still, you hope, being wide enough to catch anyone calling you. A weak station replies to your CQ, but he's some distance off your frequency, although still within your bandpass. You'd like to be able to put an audio peaking filter on his signal without affecting the rest of your setup. You don't want to change your sidetone pitch; that's a separate question for a separate discussion. You don't want to use RIT or CWT, because that will bring one of the adjacent loud signals into your bandpass. Anyway, the desired signal is too weak to trigger CWT. Likewise, you don't want to shift your main DSP filter bandpass (the context); you've got this set up for where you are and you don't want to change it just for this one 30-second QSO. If you didn't have an APF, you might try narrowing the DSP filter bandwidth, but he's far enough off-frequency that doing so would run the risk of losing his signal, meaning you would have to fiddle with both SHIFT and WIDTH to home in on him, and that takes time to do, plus more time to restore them after the QSO. What you would really like to be able to do is to adjust an audio peak filter's frequency so that it is on top of the received weak signal, but without affecting the context (your DSP shift and width, your sidetone pitch, or your transmit frequency - these should all stay where they were). My suggestion would be to use one of the buttons (DUAL PB seems to be a possible candidate here) to turn the APF feature on, and while the feature is on, the SHIFT and WIDTH controls would adjust the APF frequency and width (or Q) and would have no effect on the context filtering. RIT and SPLIT would still work normally, it's just SHIFT and WIDTH that would have been subverted to do the APF adjustments while the APF is on. If you really did want to adjust the context filter width or shift, you would have to turn APF back off to do so. Once the QSO with the weak station had been successfully concluded, you could either turn APF off, or else leave it on with its width adjusted to include the entire context bandpass, and carry on CQing. My 2c worth. 73, Rich VE3KI __ 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] APF suggestions
The APF discussion is awesome, and I'm blown away that the K3 will be upgraded with it, and it's going to be a great tool, and I don't mean to rain on the parade, but my use of it will be limited to DXing and maybe occasional general use, but probably *not* contest use. Why? Too many controls to remember, too fast a pace to turn it on and off and tune it in the elapsed time of one contact. No way would I leave it on while running. I'm good at using the existing controls to do what I have to do to dig a signal out. The trend in contesting is going *away* from having your hands on the radio. I suspect that APF might be too much of a hands-intensive tool when you're at 80 Q's per hour or higher. I would be willing to bet that if you polled FT-1000 contesters that a vast majority of them do not use APF *during a contest*. Of course, now I'll get a whole slew of responses to the contrary, but I'll stand by my comment about the majority. So I am reading with interest, although discussion of APF in the context of contesting, stations calling off frequency, etc., is not relevant to me, nor, I suspect, to many others. Al W6LX __ 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_K3] RE: P3 tutorial
Hi I am really enjoying using the P3. I am always tweaking the Ref Lev, Span and so on to look at the band or zero into a single signal. I am spending more time twiddling the P3 than the K3! Ten was open over the weekend and the P3 showed the activity quickly. Fun to watch DX working split. Well done to all, looking forward to future additions and enhancements. It is fun to grab and image of a station and then email to them! Randy K7AGE __ 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] Nearfield monitors
I beg to differ, Any radio will show its true audio traits if it is fed into a good wide-range speaker (or amplifiers and speakers). The best sound I get from my K3 is when I connect it to the input of my shack/office sound system mixer which has a wide range amplifier and good high fidelity speakers following it. The amplifier and speakers are flat from 60 Hz to about 15,000 Hz, and the speakers are AR-3s. Should I want a better and smoother sound, I would bring in either my set of Spectrum speakers or my Vandersteens No, I do not normally use it that way - I just did it for a test! The goal of speakers and amplifiers is to produce a true reproduction of the input signal. If the speakers make SSB a bit flat or make CW too crisp, you can blame it on distortion in the amplifier/speaker combination. Yes, I believe there is a place for high fidelity sound reproduction in ham radio - speakers that have ragged response curves will not faithfully reproduce the input signal. I will admit that for certain purposes, like using a speaker resonance point to amplify your chosen CW pitch may be an enhancement, that same speaker will make SSB sound funny.' As you might conclude, I enjoy faithfully reproduced sound (I compare music to what I hear in a live concert), and I abhor distortion - speaker/amplifier combinations that produce response peaks drive me to distraction. Give me a flat amplifier/speaker response that is free from distortions any day of the week - that is why I have invested in good audio gear - peaked (or muddied) speaker responses drive me nuts, even on my K3. Try your K3 driving into a good audio system and it may surprise you - the K3 is capable of Hi-Fi sound. 73, Don W3FPR On 10/27/2010 6:42 PM, The Smiths wrote: I have some NS10 Yamaha's and some Tanoy monitors that I've used with my K3, the NS10's drive a little better but are a bit flat for SSB, and a little to crisp for CW. The Tanoy's are too muffly with everything.. I find that the cheaper the speakers are the better they sound with HAM equipment. Don't get fancy with your nearfields. __ 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] Nearfield monitors
Thanks for your experience! I have a studio in the house and you get to thinking I was mostly put off by the wiring and amp effort. Laziness being the main factor. I currently use the internal speaker or my Heil (hi Bob) Traveler cans. On Oct 27, 2010, at 5:42 PM, The Smiths notforc...@hotmail.com wrote: I have some NS10 Yamaha's and some Tanoy monitors that I've used with my K3, the NS10's drive a little better but are a bit flat for SSB, and a little to crisp for CW. The Tanoy's are too muffly with everything.. I find that the cheaper the speakers are the better they sound with HAM equipment. Don't get fancy with your nearfields. From: kc9...@aol.com To: elecraft@mailman.qth.net Date: Wed, 27 Oct 2010 17:26:51 -0500 Subject: [Elecraft] Nearfield monitors Wondering if anyone is using near-field monitors with 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 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] Nearfield monitors
I'll just have to agree to disagree with you Don. The only amp that I'm using is the K3 amplifier chip. I'm not talking about hooking my K3 to a stereo system, or through a neve or SSL audio mixing board into a QSC amplifier here.. This is Ham Radio.. It's communications audio, and when you put a cheap speaker on it it tends to accentuate the freq. that the radio was made to deliver... 100Hz through 4KHz (if that). My point was plain and simple, the NS10's which are probably one of the worlds foremost nearfield monitors used in the studio environment don't sound good using only the K3 to drive them, neither do the Tanoy's (yet another VERY popular nearfield monitor used in professional studios). This person didn't say anything about hooking outboard equipment, amps, mixers etc.. he asked if anyone tried using nearfield monitors with the K3. Date: Wed, 27 Oct 2010 19:15:32 -0400 From: w3...@embarqmail.com To: notforc...@hotmail.com CC: elecraft@mailman.qth.net Subject: Re: [Elecraft] Nearfield monitors I beg to differ, Any radio will show its true audio traits if it is fed into a good wide-range speaker (or amplifiers and speakers). The best sound I get from my K3 is when I connect it to the input of my shack/office sound system mixer which has a wide range amplifier and good high fidelity speakers following it. The amplifier and speakers are flat from 60 Hz to about 15,000 Hz, and the speakers are AR-3s. Should I want a better and smoother sound, I would bring in either my set of Spectrum speakers or my Vandersteens No, I do not normally use it that way - I just did it for a test! The goal of speakers and amplifiers is to produce a true reproduction of the input signal. If the speakers make SSB a bit flat or make CW too crisp, you can blame it on distortion in the amplifier/speaker combination. Yes, I believe there is a place for high fidelity sound reproduction in ham radio - speakers that have ragged response curves will not faithfully reproduce the input signal. I will admit that for certain purposes, like using a speaker resonance point to amplify your chosen CW pitch may be an enhancement, that same speaker will make SSB sound funny.' As you might conclude, I enjoy faithfully reproduced sound (I compare music to what I hear in a live concert), and I abhor distortion - speaker/amplifier combinations that produce response peaks drive me to distraction. Give me a flat amplifier/speaker response that is free from distortions any day of the week - that is why I have invested in good audio gear - peaked (or muddied) speaker responses drive me nuts, even on my K3. Try your K3 driving into a good audio system and it may surprise you - the K3 is capable of Hi-Fi sound. 73, Don W3FPR On 10/27/2010 6:42 PM, The Smiths wrote: I have some NS10 Yamaha's and some Tanoy monitors that I've used with my K3, the NS10's drive a little better but are a bit flat for SSB, and a little to crisp for CW. The Tanoy's are too muffly with everything.. I find that the cheaper the speakers are the better they sound with HAM equipment. Don't get fancy with your nearfields. __ 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] Double Trouble Sound Card or MMTTY
I changed out my old Dell for a newer and faster dell OPtiplex GX620. Now I can not get MMTTY to run. I first started with the newer 1.68 version but then went back to 1.65 which was running fine on the old machine. Still not go! The Sound card in the GX620 is Analog Devices Sound Max. I am getting audio into the soundcard because I can hear it on headphones on the PC Line Out port. My K3 is set up OK because it will decode RTTY and display it. Instead of two-ring figure for the MMTTY XY plot, I only get a blob and jibberish printing out. When running WriteLog, the sound card is able to take WAV files and input them to my K3 transceiver. So the sound card is not totally dead. I have been over and over the MTTY setup and am confident that the setup is OK. Of course I could be missing something. I am beginning to suspect the motherboard mounted sound card is messed up. Any tips/tests will be greatly appreciated. My next step is desperation and to try an outbouard USB sound card. I read some reports that this might be better anyway. __ 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] Double Trouble Sound Card or MMTTY
Robert, Do you have the sideband set correctly? - both MMTTY and the K3? How about the mark frequency? - they must match. 73, Don W3FPR On 10/27/2010 8:38 PM, Robert Seymour wrote: I changed out my old Dell for a newer and faster dell OPtiplex GX620. Now I can not get MMTTY to run. I first started with the newer 1.68 version but then went back to 1.65 which was running fine on the old machine. Still not go! The Sound card in the GX620 is Analog Devices Sound Max. I am getting audio into the soundcard because I can hear it on headphones on the PC Line Out port. My K3 is set up OK because it will decode RTTY and display it. Instead of two-ring figure for the MMTTY XY plot, I only get a blob and jibberish printing out. When running WriteLog, the sound card is able to take WAV files and input them to my K3 transceiver. So the sound card is not totally dead. I have been over and over the MTTY setup and am confident that the setup is OK. Of course I could be missing something. I am beginning to suspect the motherboard mounted sound card is messed up. Any tips/tests will be greatly appreciated. My next step is desperation and to try an outbouard USB sound card. I read some reports that this might be better anyway. __ 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] Nearfield monitors
I saw this thread begin and thought, Good, some discussion of antenna measurements. http://www.nearfield.com/BOOKPAGE.HTM How disappointing. --- On Wed, 10/27/10, Kc9fat kc9...@aol.com wrote: From: Kc9fat kc9...@aol.com Subject: Re: [Elecraft] Nearfield monitors To: The Smiths notforc...@hotmail.com Cc: Elecraft Reflector elecraft@mailman.qth.net Date: Wednesday, October 27, 2010, 5:46 PM Thanks for your experience! I have a studio in the house and you get to thinking I was mostly put off by the wiring and amp effort. Laziness being the main factor. I currently use the internal speaker or my Heil (hi Bob) Traveler cans. On Oct 27, 2010, at 5:42 PM, The Smiths notforc...@hotmail.com wrote: I have some NS10 Yamaha's and some Tanoy monitors that I've used with my K3, the NS10's drive a little better but are a bit flat for SSB, and a little to crisp for CW. The Tanoy's are too muffly with everything.. I find that the cheaper the speakers are the better they sound with HAM equipment. Don't get fancy with your nearfields. From: kc9...@aol.com To: elecraft@mailman.qth.net Date: Wed, 27 Oct 2010 17:26:51 -0500 Subject: [Elecraft] Nearfield monitors Wondering if anyone is using near-field monitors with 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
Re: [Elecraft] K3 Rf gain tracking (main vs. sub)
I must have missed something. I don't see any requirement for a sig gen in the rf gain calibration procedure instead, I read it as being an automatic procedure in the K3 utility that only requires a suitable load or termination. Where is the procedure that involves a sig gen other than the S-meter calibration that follows the rf gain calibration in the owner's manual (pg. 51)? I'm new to Elecraft, just built my K3 and P3 and am getting acquainted with them. 73, Gary N6LRV -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Don Wilhelm Sent: Tuesday, October 26, 2010 8:26 AM To: Stan Gibbs Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 Rf gain tracking (main vs. sub) Have you done as has been recommended several times during this thread? - use the latest K3 Utility and run the RF Gain Calibration. First do the set to defaults, and then run the calibration with a signal generator having a controlled output level. Follow the instructions and be certain to tune the K3 exactly to the generators frequency (use CWT if necessary). Several have commented that this step has corrected their problem. 73, Don W3FPR __ 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] Nearfield monitors
On 10/27/2010 5:30 PM, The Smiths wrote: and when you put a cheap speaker on it it tends to accentuate the freq. that the radio was made to deliver... 100Hz through 4KHz (if that). Nope. The problem with cheap speakers is NOT limited frequency response, it is BUMPY frequency response, which makes it harder to copy both speech and CW. I know -- I've MEASURED a bunch of cheap speakers, and that's what they look like, and it's how they sound. I've got good, near field speakers hooked up to my K3 (main and sub-rx). My point was plain and simple, the NS10's which are probably one of the worlds foremost nearfield monitors used in the studio environment don't sound good using only the K3 to drive them, neither do the Tanoy's (yet another VERY popular nearfield monitor used in professional studios). The shortcoming of most small speakers, including the ones you cited, is that they have POOR VOLTAGE SENSITIVITY, meaning that it takes more voltage to drive them than the K3 is designed to deliver. They are designed to be driven by big power amps, not the low power chip used in the K3, so the K3 doesn't have enough voltage headroom for them I suspect that it is this is at the root of your dissatisfaction with your studio monitors. But Don is entirely correct that the ideal loudspeaker for a ham rig is one that has FLAT response in the speech range, and has good polar response (that is, the response remains the same as you move around in front of it. The fact that it has good low end or high end does not matter -- it's neither a plus nor a minus. 73, Jim Brown K9YC __ 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] APF For K3
Another K3 feature that removes yet another external box in
my system! I can finally get rid of my Autek QF1 when this
is implemented!
I really like this scenario from a control layout logic
standpoint. Great idea, Rich!
One thing, tho, in addition to the panel buttons, there has
to be a command in the command set to reset the APF back
to where it was before, hopefully from the git-go. One of
the most confounding things about using my old TS850 with
N1MMLogger was I had to physically punch the RIT button off
and remember to center the knob (it had no center detent
either!). Loved the radio, hated that feature!
Its oh so much easier to include {CLEARRIT} in the TU
message to reset the RIT after a QSO! So I would ask that a
software command to clear the APF also be included with this
feature so that N1MM developer Jedi K3CT can create a
{CLEARAPF} command for the feature (Or possibly anybody
could create one with a CATHEX macro embedded in the TU
message).
I look forward to this feature. I will be among FT1000'ds
this weekend and will explore the APF feature Friday morning
to see how it works (if I have time off during contest
setup). I have never used a modern Yaesu rig in CW, so
there is always a first time!
If its anything like my Autek QF1, I will like it!
See all of you in the pileups (from NQ4I)!
-lu-w4lt-
--
Message: 32
Date: Wed, 27 Oct 2010 16:54:34 -0400
From: Richard Ferch ve3...@storm.ca
Subject: Re: [Elecraft] APF For K3
To: elecraft@mailman.qth.net elecraft@mailman.qth.net
Message-ID: 4cc8918a.7060...@storm.ca
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Here is an operational scenario:
You are CQing in the CQ WW CW contest. There are other loud
stations
CQing on either side of you. You have adjusted your SHIFT
and WIDTH
controls to eliminate the adjacent-channel interference
while still, you
hope, being wide enough to catch anyone calling you.
A weak station replies to your CQ, but he's some distance
off your
frequency, although still within your bandpass. You'd like
to be able to
put an audio peaking filter on his signal without affecting
the rest of
your setup.
You don't want to change your sidetone pitch; that's a
separate question
for a separate discussion. You don't want to use RIT or CWT,
because
that will bring one of the adjacent loud signals into your
bandpass.
Anyway, the desired signal is too weak to trigger CWT.
Likewise, you
don't want to shift your main DSP filter bandpass (the
context);
you've got this set up for where you are and you don't want
to change it
just for this one 30-second QSO. If you didn't have an APF,
you might
try narrowing the DSP filter bandwidth, but he's far enough
off-frequency that doing so would run the risk of losing his
signal,
meaning you would have to fiddle with both SHIFT and WIDTH
to home in on
him, and that takes time to do, plus more time to restore
them after the
QSO.
What you would really like to be able to do is to adjust an
audio peak
filter's frequency so that it is on top of the received weak
signal, but
without affecting the context (your DSP shift and width,
your sidetone
pitch, or your transmit frequency - these should all stay
where they were).
My suggestion would be to use one of the buttons (DUAL PB
seems to be a
possible candidate here) to turn the APF feature on, and
while the
feature is on, the SHIFT and WIDTH controls would adjust the
APF
frequency and width (or Q) and would have no effect on the
context
filtering. RIT and SPLIT would still work normally, it's
just SHIFT and
WIDTH that would have been subverted to do the APF
adjustments while the
APF is on. If you really did want to adjust the context
filter width or
shift, you would have to turn APF back off to do so. Once
the QSO with
the weak station had been successfully concluded, you could
either turn
APF off, or else leave it on with its width adjusted to
include the
entire context bandpass, and carry on CQing.
My 2c worth.
73,
Rich VE3KI
__
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Re: [Elecraft] Double Trouble Sound Card or MMTTY
On Oct 27, 2010, at 5:38 PM, Robert Seymour wrote: Instead of two-ring figure for the MMTTY XY plot, I only get a blob and jibberish printing out. When running WriteLog, the sound card is able to take WAV files and input them to my K3 transceiver. If you are seeing a fuzzy blob at the center of a crossed-ellipse display, it means that the (software) demodulator is tuned to some passband that contains noise and not the RTTY signal itself. I would check to make sure that the Mark/Space tone pair that you have selected in your software matches the tone pair that is selected in the K3 (while in AFSK A mode, hold PITCH button -- the K3 will display the Mark tone that is selected). 73 Chen, W7AY __ 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] Double Trouble Sound Card or MMTTY
I changed out my old Dell for a newer and faster dell OPtiplex GX620. Now I can not get MMTTY to run. Your problems sound a lot like soundcard configuration issues. The Sound card in the GX620 is Analog Devices Sound Max. Unfortunately, Analog Devices provides no end-user support (they are a vendor to OEMs) and the only information available is that which would be provided by Dell. Instead of two-ring figure for the MMTTY XY plot, I only get a blob and jibberish printing out. This sounds like MMTTY is not configured for the proper input or you have connected the K3 Line Out to the wrong jack on the PC. Now I can not get MMTTY to run. I first started with the newer 1.68 version but then went back to 1.65 which was running fine on the old machine. I recommend you get MMTTY version 1.66 or 1.68 they are easier to get working with soundcard problems. What operating system are you running? The Dell documentation shows three inputs for the soundcard: 1) front panel microphone, 2) rear panel microphone and 3) rear panel Line In. I suggest you use the rear panel Line In. My next step is desperation and to try an outbouard USB sound card. I read some reports that this might be better anyway. That may be a good solution if your operating system is Vista or Windows 7. They have some restrictions on soundcard behavior - they will not allow applications to select inputs on the default sound card. Installing a second soundcard is one way to sidestep the operating system restrictions. Be forewarned however, some computers do silly things like disabling the internal sound card if a second sound card is installed (even a USB sound card). You may need to be prepared to work through the computer's BIOS (hardware setup) to make two sound cards work together. By the way, the best source for help with MMTTY is the MMTTY group on Yahoo. 73, ... Joe, W4TV On 10/27/2010 8:38 PM, Robert Seymour wrote: I changed out my old Dell for a newer and faster dell OPtiplex GX620. Now I can not get MMTTY to run. I first started with the newer 1.68 version but then went back to 1.65 which was running fine on the old machine. Still not go! The Sound card in the GX620 is Analog Devices Sound Max. I am getting audio into the soundcard because I can hear it on headphones on the PC Line Out port. My K3 is set up OK because it will decode RTTY and display it. Instead of two-ring figure for the MMTTY XY plot, I only get a blob and jibberish printing out. When running WriteLog, the sound card is able to take WAV files and input them to my K3 transceiver. So the sound card is not totally dead. I have been over and over the MTTY setup and am confident that the setup is OK. Of course I could be missing something. I am beginning to suspect the motherboard mounted sound card is messed up. Any tips/tests will be greatly appreciated. My next step is desperation and to try an outbouard USB sound card. I read some reports that this might be better anyway. __ 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] Asia Pacific DX Conference
Hello Group, I am going to this http://apdxc.org next week in Osaka. Am I able to meet any Elecrafter there? 73 Johnny VR2XMC __ 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] Nearfield monitors
This will be my last post on the subject because some people don't understand that I'm only trying to convey that you don't need 800 dollar nearfield monitors that come from a professional studio in order to enjoy the sounds coming out of your K3. Yes, the NS10's and the Tanoy speakers require more drive in order to make them sound good. This is EXACTLY why I said that using them with the K3 as they are makes them a BAD choice for the reasons that I stated. They don't sound good. When someone asks how do Nearfield monitors/speakers sound on the K3 I think Professional speakers hooked up to the K3, not consumer hi fidelity speakers. I'm sorry but if you know anything about the NS10's you should know that those speakers have a 2 kHz bump of + 5 dB and low frequency drop starting at 200 Hz they “open” the frequency range with a midrange-based response that exposes the most problematic and worst-sounding frequencies. In your consumer hi-fi, the EQ preset that makes most music sound “better” (”Loudness”, “Rock”) is exactly the NS-10 frequency response, flipped upside down… Perfect for monitoring, but fail (as you said) under low voltages. A flat response from a set of speakers would NOT be ideal to most people. Consumers are used to hearing their audio colored, with EQ, Like they do out of their home stereos and car radios with their 6 speaker systems and separate sub woofer systems. If you were to have a perfect flat response speaker and put someone in front of them you would probably get the reaction from them that they sound dull, or too bright/crisp (assuming the top end 8-20KHz could actually be flat). You missed my point about cheap speakers.. I didn't say that they had limited freq. range.. I said that they tend to accentuate the freq. that the K3 has to offer (not attenuate). As in they bump the 1.5KHz voice portion, and 300 to 500 Hz CW areas. Exactly what people want to hear when listening to a communications radio. Cheap speakers, and I'm not talking about 10 dollar computer speakers.. You people don't always have to be so literal... aren't what I was talking about. I was referring to Cheap speakers as in 30 to 100 dollar speakers would be more than enough to enjoy all that the K3 has to offer. There's just no need to put Hi fidelity speakers on the K3, with or without an outboard amp.. I'm sorry... CW just isn't going to sound any better from a 1000 dollar speaker. SSB may, but why bother? (man I almost said it's just glorified CB radio anyway... I'm glad I didn't do that, the flames would have never stopped) There comes a point where a 100 dollar speaker will sound just as good as a 1000 dollar speaker. Besides, most people could never hear the difference if they were given the opportunity. If it were up to me, I would just go out and get a really nice pair of headphones if you really want good sound when it comes to SSB. I'm sorry, but I'm just trying to be practical here... I wish some of you would try to be from time to time too. Nuf said.. No need to respond We'll just have to agree to disagree. Date: Wed, 27 Oct 2010 18:21:29 -0700 From: j...@audiosystemsgroup.com To: elecraft@mailman.qth.net Subject: Re: [Elecraft] Nearfield monitors On 10/27/2010 5:30 PM, The Smiths wrote: and when you put a cheap speaker on it it tends to accentuate the freq. that the radio was made to deliver... 100Hz through 4KHz (if that). Nope. The problem with cheap speakers is NOT limited frequency response, it is BUMPY frequency response, which makes it harder to copy both speech and CW. I know -- I've MEASURED a bunch of cheap speakers, and that's what they look like, and it's how they sound. I've got good, near field speakers hooked up to my K3 (main and sub-rx). My point was plain and simple, the NS10's which are probably one of the worlds foremost nearfield monitors used in the studio environment don't sound good using only the K3 to drive them, neither do the Tanoy's (yet another VERY popular nearfield monitor used in professional studios). The shortcoming of most small speakers, including the ones you cited, is that they have POOR VOLTAGE SENSITIVITY, meaning that it takes more voltage to drive them than the K3 is designed to deliver. They are designed to be driven by big power amps, not the low power chip used in the K3, so the K3 doesn't have enough voltage headroom for them I suspect that it is this is at the root of your dissatisfaction with your studio monitors. But Don is entirely correct that the ideal loudspeaker for a ham rig is one that has FLAT response in the speech range, and has good polar response (that is, the response remains the same as you move around in front of it. The fact that it has good low end or high end does not matter -- it's neither a plus nor a minus. 73, Jim Brown K9YC __ Elecraft mailing
[Elecraft] Nearfield monitors
Don Wilhelm wrote: Any radio will show its true audio traits if it is fed into a good wide-range speaker (or amplifiers and speakers). I strongly agree, but theoretically a speaker with an intentionally limited response (as opposed to a cheap speaker) can to some extent cover up some problems in the radio's audio as revealed by the good wide-range speaker. What I haven't seen mentioned in this discussion is that if you want a good wide-range speaker, e.g. for critical examination of your radio, or for permanent use if the radio has good audio, it is not enough to buy some specific speaker known for good quality. Any given speaker can vary enormously in its response curve depending on how it is placed in relation to walls and other equipment. It is not enough to follow some instruction sheet that came with the speaker. I find that with quality speakers it is necessary to perform some kind of response measurement during installation. This is not as straightforward as it may seem. Even good speakers tend to have response variations with frequency, but if you look at measured response diagrams, they are for anechoic chambers. In practical installations you will encounter all kinds of room resonances that cause bumpiness even with the best speakers. The objective then cannot be flat response, but a flat average response over limited frequency ranges, and balance between those ranges. My favorite way of testing for that is to use a series of warbling test tones, each of which covers a limited range of different frequencies, as produced by an old test CD I have (disques PIERRE VERANY PV 784031 CA 803 DEMONSTRATIONS TESTS). On the detection side I use a cheap RS sound level meter. It is not perfect for the highest audible range, but the room resonances happen mostly at the lower frequencies anyway. You get an average reading during the warbling, and this is much faster than measuring at high numbers of individual frequencies. Warning: when you have moved the speakers for the flattest possible response, they are not likely to be where you would like them from a decorator's point of view! 73, Erik K7TV __ 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] APF suggestions
Al, Trying to interpret your message. 1. You are a contester and don't think you will use the APF filter in a contest. 2. You believe FT-1000 contesters do not use APF during a contest. 3. The discussion of APF for contesting is not relevant to you. 4. You suspect APF is not relevant to many other contesters. First lets remind ourselves that we are obviously talking about CW ! I use APF all the time in a CW DX contest. Here I am in the wee hours of the morning. Have a nice run going, my last CQ got a weak response right at the noise level. I send qrz and use the APF to peak him up and make a successful contact, and sweet it is a new multiplier ! If it wasn't for APF I would have missed many contacts ! I still have my FT-1000 along with my other new rigs and can switch it in any time, I worked the Stew Perry 160 CW contest last weekend and over half of the qso's were made using the APF on the FT1000. The APF on the FT1000 really shines when the signal is right at the noise level as is common on 160. Not just on 160 though, in any of the CW DX contests the APF is a very valuable asset. We discussed this topic at one of our past Northern Cal DX Club meetings and the topic was not whether everyone used APF but what is the best outboard APF to use in a contests for rigs that do not have one ! 73, Bob K6UJ On Oct 27, 2010, at 4:00 PM, Al Lorona wrote: The APF discussion is awesome, and I'm blown away that the K3 will be upgraded with it, and it's going to be a great tool, and I don't mean to rain on the parade, but my use of it will be limited to DXing and maybe occasional general use, but probably *not* contest use. Why? Too many controls to remember, too fast a pace to turn it on and off and tune it in the elapsed time of one contact. No way would I leave it on while running. I'm good at using the existing controls to do what I have to do to dig a signal out. The trend in contesting is going *away* from having your hands on the radio. I suspect that APF might be too much of a hands-intensive tool when you're at 80 Q's per hour or higher. I would be willing to bet that if you polled FT-1000 contesters that a vast majority of them do not use APF *during a contest*. Of course, now I'll get a whole slew of responses to the contrary, but I'll stand by my comment about the majority. So I am reading with interest, although discussion of APF in the context of contesting, stations calling off frequency, etc., is not relevant to me, nor, I suspect, to many others. Al W6LX __ 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] APF in the K3
I rarely turned off the APF's in my FT-990 and FT-1000D when I had them. It's exciting to hear that an APF may appear in the K3! 73! Ken Kopp - K0PP elecraftcov...@rfwave.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] Nearfield monitors
True, true. My Vandersteen speakers that I use for my home theater listening must be placed more than 2 feet from the wall, and are mounted on 3 point floor stands. I did not ask a decorator, I asked my audio experts - the decoration is secondary to the acoustical performance. One must make compromises, but I choose to not compromise the audio response. Fortunately, the XYL is forgiving on this subject (after she heard it). I did have to make compromises in the placement of the surround sound rear speakers - but that is not applicable to this discussion, so regard it as a mere fact in passing. The point relevant to ham radio is that a high fidelity audio installation is not out of the question for the best appreciation of what any particular receiver can produce. Speakers with a bumpy response will color the audio heard, and may produce unpleasant products. A radio should not be judged by the speakers that you attach to it, the speakers should faithfully produce the audio fed to them. One may choose to make compromises here, but I choose not to do that. IMHO, the sound from those old speakers sold with several ham radio receivers sound distorted. But, if you like it, each to his own opinion. What I am suggesting is that you try connecting the K3 audio output to a good high quality sound system to gain an appreciation for how good it can sound - then make your own compromises from that point of reference. Yes, the XYL is quite happy listening to a radio station on one of those under the cabinet radios, but I just have to walk away from that distorted audio - each to his own. 73, Don W3FPR On 10/27/2010 11:09 PM, Erik Basilier wrote: Warning: when you have moved the speakers for the flattest possible response, they are not likely to be where you would like them from a decorator's point of view! __ 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] Roses for Elecraft
Just a note to reinforce what so many of us know about the quality (and quantity) of the customer service provided by Elecraft. It's not the first time they've helped me and I'm sure it won't be the last. certainly won't be the last time I'll need their help. My K3 developed a problem in the main tuning encoder and/or knob of VFO A as I was preparing my station for operation in this weekend's CQ WWDX Contest. The tuning has always been smooth and easy to do but a couple of days ago, the tuning became more difficult. Instead of easily spinning the knob with a finger, it took a pretty good grip on the knob to move it, although the encoder was still working properly for the operation. I sure did not look forward to the contest operation with such a hindrance. I could have used the VFO B knob with the second receiver but that's just not the same, especially for multiple hours. I searched through reflector messages spanning a couple of years and found lots of notes about split tandem knobs and expensive replacement knobs from others but nothing to match the problem I was having. I sent the following message to k3supp...@elecraft.com: - My K3 is S/N 1068 and within the last several days the primary encoder on the VFO A knob has become difficult to turn. When it does turn, it tunes the transceiver correctly but it is just hard to move and it seems to be getting even more difficult, the more I try to move it. I was planning to make a major effort in the coming CQ WWDX Contest this weekend but if there's not an easy and quick fix, I'll have to go back to my IC-756PRO and I didn't want to do that. I've always been very careful in tuning to not place any weight on the knob since I know that could eventually cause a problem. Previously, this encoder has been very free and easily turned but it just got difficult overnight. I also can move the encoder shaft up and down and side to side a small bit and I don't believe it did that previously. The B VFO encoder certainly doesn't. Is there something I can do, short of disassembly? Anxious, Jim - K5LAD -- Within the hour, I had two answers back, within a few minutes of each other one from Gary - AB7MY in Arizona and the other from Dale - K6ZP in California. Both offered excellent suggestions of possible quick repairs and/or workarounds. I removed the finger guard around the knob to access the set screw and removed the large knob. What I found was, the second (outer) nut was completely unscrewed and the other was quite loose. (My wife asked me how that could happen and I told her, Overuse. She was not amused.) Once I got the main control nut re-tightened and the second one snugged back up tight, the felt washer fit right back on, the knob went back on, tightened up the set screw and replaced the finger grip. smoth as silk and turns effortlessly like before. I thought of all the things that made this activity into a knock your socks off customer service example. 1. Immediate response 2. Expert and knowledgeable help 3. Willingness to help and help immediately 4. An ability and willingness to supply needed parts quickly if necessary Then I thought about the competition and wondered how many of this list I would have seen from them if my transceiver had displayed a different name on it other than Elecraft. I'm pretty sure I could easily answer that and so could hundreds (or thousands) of satisfied Elecraft users. Thanks Elecraft Thanks Gary Thanks Dale I'll see all you DX operators in the contest this weekend. 73, Jim - K5LAD === Life is like a football --- It ain't round ... It'll bounce funny on ya. http://www.hayseed.net/~jpk5lad/ __ 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 Rf gain tracking (main vs. sub)
There are two 'gain calibration' procedures. One is for TRANSMIT gain which requires a dummy load. The other is for receiver RF gain and it can be done with a signal source or by loading the factory defaults without a signal source. It is on the Calibration page of the K3 Utility and is a button labeled 'Calibrate RF Gain'. On 10/27/2010 6:19 PM, Gary wrote: I must have missed something. I don't see any requirement for a sig gen in the rf gain calibration procedure instead, I read it as being an automatic procedure in the K3 utility that only requires a suitable load or termination. Where is the procedure that involves a sig gen other than the S-meter calibration that follows the rf gain calibration in the owner's manual (pg. 51)? I'm new to Elecraft, just built my K3 and P3 and am getting acquainted with them. 73, Gary N6LRV -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Don Wilhelm Sent: Tuesday, October 26, 2010 8:26 AM To: Stan Gibbs Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 Rf gain tracking (main vs. sub) Have you done as has been recommended several times during this thread? - use the latest K3 Utility and run the RF Gain Calibration. First do the set to defaults, and then run the calibration with a signal generator having a controlled output level. Follow the instructions and be certain to tune the K3 exactly to the generators frequency (use CWT if necessary). Several have commented that this step has corrected their problem. 73, Don W3FPR -- 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
