Re: [Elecraft] K3s can only transmit wsjt if the K3s codec is windows default.
Peter, Absolutely brilliant! I never have seen this windows page or read about it, but it absolutely did the trick. I now have an alternate soundcard selected in windows sound control panel and have WSJT-X configured in App volume and device preferences. I have to experiment to be sure nothing gets out sound-wise from the computer but at first exposure, this looks to be dead on. How many others have not yet discovered this! 73! Gary KA1J > G'day Gary, > > This should work : > > Run WSJT-X > > Go to the system settings via the cog in the start menu. > > Click on "System (Display, sound, notifications") > > Click on "Sound" > > Scroll down to "Other sound options" and click on "App volume and > device preferences". > > Select WSJT-X from the list of displayed apps and select your USB > CODEC for both input and output. > > Note that I don't use WSJT-X but that's how it's done for everything > else. > > Cheers, > Peter VK4JD > > > > -Original Message- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Gary Smith > Sent: Saturday, 19 January 2019 1:53 PM To: Elecraft@mailman.qth.net > Subject: [Elecraft] K3s can only transmit wsjt if the K3s codec is > windows default. > > Folks, > > I posted this on the WSJT-X reflector but > got no replies. Perhaps someone here has > the answer. > > --- > > Using Windows 10... Joy... > > I have WSJT-X set up to use the K3s USB > Audio Codec, input & output. Both are > selected as Mono. > > The codec is selected in the computer. > > I have found no way to get the K3s to > transmit unless the K3s USB codec is set > to default device in the computer. > > If I have another soundcard/option > selected in the computer, the K3s will > indeed present transmit mode as WSJT-X > signals it to do, but there is no RF > generated from the K3s. It's Lights on, > nobody home. WSJT works fine but also > transfers any computer sound to the K3s > during transmit. > > If nothing is playing on the computer and > the codec is selected as default, I have > no trouble with anything WSJT-X related. > This is how I have had to have it working > for the last 10 months. However, I > recently discovered a youtube was playing > on another page and that audio was coming > through with my WSJT transmission. This is > unacceptable. > > Bottom line seems to be, I must have the > K3s USB codec selected as default in the > windows sound control panel or I cannot > transmit with WSJT-X. > > There must be another something I'm > missing but I can't seem to find it. > > Any suggestions? > > 73, > > Gary > KA1J > > > > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to plamb...@qa.com.au > > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KAT 500 and open wire
> On Jan 18, 2019, at 6:08 PM, Al Lorona wrote: > > Thing 1 is that, clearly, water really messes up window line's loss. However, > I'm guessing that a/ in a place like southern California, where perpetual > drought is the new normal; ... Clean water isn’t a problem. Dirty water is a big problem. When I first moved to the SF Bay area in the early 1980s, I was surprised by the number of power outages, compared to where I grew up in Louisiana with heavy weather. The first light rain would be accompanied by outages. With six or more rainless summer months, dust and grit would accumulate on the power line insulators. The first light rain would create conductive mud and trip breakers. So perpetual drought is just a way to build up more dust on the line. I think we take coaxial cable for granted. It was a brilliant invention and a real gift to people who love radio. Maybe I’ll start celebrating December 8th as Coaxial Cable Day. https://www.wired.com/2009/12/1208coaxial-cable-patent/ wunder K6WRU Walter Underwood CM87wj http://observer.wunderwood.org/ (my blog) __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3s can only transmit wsjt if the K3s codec is windows default.
G'day Gary, This should work : Run WSJT-X Go to the system settings via the cog in the start menu. Click on "System (Display, sound, notifications") Click on "Sound" Scroll down to "Other sound options" and click on "App volume and device preferences". Select WSJT-X from the list of displayed apps and select your USB CODEC for both input and output. Note that I don't use WSJT-X but that's how it's done for everything else. Cheers, Peter VK4JD -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Gary Smith Sent: Saturday, 19 January 2019 1:53 PM To: Elecraft@mailman.qth.net Subject: [Elecraft] K3s can only transmit wsjt if the K3s codec is windows default. Folks, I posted this on the WSJT-X reflector but got no replies. Perhaps someone here has the answer. --- Using Windows 10... Joy... I have WSJT-X set up to use the K3s USB Audio Codec, input & output. Both are selected as Mono. The codec is selected in the computer. I have found no way to get the K3s to transmit unless the K3s USB codec is set to default device in the computer. If I have another soundcard/option selected in the computer, the K3s will indeed present transmit mode as WSJT-X signals it to do, but there is no RF generated from the K3s. It's Lights on, nobody home. WSJT works fine but also transfers any computer sound to the K3s during transmit. If nothing is playing on the computer and the codec is selected as default, I have no trouble with anything WSJT-X related. This is how I have had to have it working for the last 10 months. However, I recently discovered a youtube was playing on another page and that audio was coming through with my WSJT transmission. This is unacceptable. Bottom line seems to be, I must have the K3s USB codec selected as default in the windows sound control panel or I cannot transmit with WSJT-X. There must be another something I'm missing but I can't seem to find it. Any suggestions? 73, Gary KA1J __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to plamb...@qa.com.au __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K3s can only transmit wsjt if the K3s codec is windows default.
Folks, I posted this on the WSJT-X reflector but got no replies. Perhaps someone here has the answer. --- Using Windows 10... Joy... I have WSJT-X set up to use the K3s USB Audio Codec, input & output. Both are selected as Mono. The codec is selected in the computer. I have found no way to get the K3s to transmit unless the K3s USB codec is set to default device in the computer. If I have another soundcard/option selected in the computer, the K3s will indeed present transmit mode as WSJT-X signals it to do, but there is no RF generated from the K3s. It's Lights on, nobody home. WSJT works fine but also transfers any computer sound to the K3s during transmit. If nothing is playing on the computer and the codec is selected as default, I have no trouble with anything WSJT-X related. This is how I have had to have it working for the last 10 months. However, I recently discovered a youtube was playing on another page and that audio was coming through with my WSJT transmission. This is unacceptable. Bottom line seems to be, I must have the K3s USB codec selected as default in the windows sound control panel or I cannot transmit with WSJT-X. There must be another something I'm missing but I can't seem to find it. Any suggestions? 73, Gary KA1J __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KAT 500 and open wire
Using matching transformers and my spectrum analyzer with tracking generator, I measured a 100 ft length dry and I measured it wet. My measurements indicated the velocity factor changed when wet, i.e. the electrical length of the line changed. Thus explains to me the reason to "retune" when the line is wet or covered with frost, ice or snow. With my tuner, that means I must push a button. Oh geez. I agree the loss does increase a wee bit when wet in a horizontal position. Considering we have less than 100 days with recorded or measured precipitation in my area, it is no big deal. My window line is mostly vertical and that which is horizontal has about 5 twists per 10 ft. Still worst case, I find it has less loss than coax and less expensive than coax which has equal or less loss. 73 Bob, K4TAX On 1/18/2019 8:08 PM, Al Lorona wrote: G3TXQ's work here is awesome, as is N7WS's before him. I'm thinking two things: Thing 1 is that, clearly, water really messes up window line's loss. However, I'm guessing that a/ in a place like southern California, where perpetual drought is the new normal; and b/ in an installation where the window line, rather than running perfectly horizontally so water can pool, has a slant, allowing it to shed water; a ham would probably be fine using it. All one would have to do to discourage pooling on a horizontal run is twist the line once every few meters. Thing 2 is that G3TXQ shows matched loss at 6.72 MHz in heavy rainfall increasing from 0.2 to 1.1 dB per 100 feet, which seems totally acceptable for worst-case rainfall. In moderate rainfall the loss increased to only 0.34 dB/100 ft. That's lower than any coax out there. I myself would never use it (for reasons other than water loss), but window line seems like an okay choice for those hams who can't or won't use coax. Al W6LX Glossary: "Window line" = Wireman 551 or 552 or equivalent http://www.karinya.net/g3txq/wet_ll/ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to rmcg...@blomand.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] Complete K3S Contester/DX Package For sale
Up for sale is my Complete K3S Contester/DX Package includes P3 w SVGA, all factory built. All options and filters factory installed. Include Gen. Coverage receiver, FM bandwidth filter, 2.8 upgrade, 2.1 hz, SSB Filters 400hz & 200hz CW (Identical filters on main and sub) receiver. Also K3/0 Mini control head, KPOD w/ ac Power supply Includes K3S & P3 Book and the Macro programming manual from Fred Cady This complete system is in as new conditions. Manuals are unused. Everything supplied by Elecraft (All cables, Accessories, Manuals, Paperwork, Decals and of course the Hat (Unused) are included in all of the original packaging and boxes. This package was purchased in May of 2018. To be on the safe side I sent the K3S (SN 116XX) back to Elecraft where they went through the alignment and all functions and returned it 10 days ago with “No problems found”. My investment is $8092 plus $184 for the checkup. I would like $7200 or best offer. Shipping and insurance are included (USA lower 48 states). All paper work available and included. If you are seriously interested, I will email a copy of the detailed invoice from Elecraft. Pictures are available on request, but they’re going to show what look like and is, for all intents and purposes brand new equipment. Approx 20 hours of power-on time. Always covered when not in use from a strictly non smoking environment . Reason for sale: This is way more radio than my meager needs or my old brain can process. Ron Genovesi n3...@coastside.net 541-761-1103 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] WSJT-X Frequency Anomaly
To all of you who have jumped in with much wisdom about this phenomenon, thank you. I am collecting all it and carefully going through it. Please keep it coming. Even though I don't think it hinders me from having lots of fun with FT8, my perfectionistic devils want to see what can be done. Cheers. Richard — W4KBX __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KAT 500 and open wire
G3TXQ's work here is awesome, as is N7WS's before him. I'm thinking two things: Thing 1 is that, clearly, water really messes up window line's loss. However, I'm guessing that a/ in a place like southern California, where perpetual drought is the new normal; and b/ in an installation where the window line, rather than running perfectly horizontally so water can pool, has a slant, allowing it to shed water; a ham would probably be fine using it. All one would have to do to discourage pooling on a horizontal run is twist the line once every few meters. Thing 2 is that G3TXQ shows matched loss at 6.72 MHz in heavy rainfall increasing from 0.2 to 1.1 dB per 100 feet, which seems totally acceptable for worst-case rainfall. In moderate rainfall the loss increased to only 0.34 dB/100 ft. That's lower than any coax out there. I myself would never use it (for reasons other than water loss), but window line seems like an okay choice for those hams who can't or won't use coax. Al W6LX Glossary: "Window line" = Wireman 551 or 552 or equivalent >>> http://www.karinya.net/g3txq/wet_ll/ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] thinning out the herd......
FINALLY SELLING SOME OF MY STUFF DUE TO TOO MUCH STUFF I have 2 K3 radios. I do not need 2. ELECRAFT STATION K3 #44 ... KRX3 DUAL RECEIVERS ... TWO NEW SYNTHESIZERS...( 20DB QUIETER XMIT & RCV ) 100 WATT KPA3 AMP MODULE 10-1 ANTENNA MATCHING TUNER KAT3 DVR INSTALLED...NEW DSP UPGD...AUX DSP..KIO3A I/O..MODIFIED AUDIO STAGE... GOLD PINSALC MODPWR METEREXTREME SIGNAL PROTECTIONLPA SINKS EXTRA FILTERS IN MAIN RECEIVER... ALL UPDATES COMPLETED & VERIFIED , MEET ALL SPECS AT FACTORY NO SMOKING ...KEPT IN TEMPERATURE CONTROLLED CABINET 2600 $ SHIPPED still have kx3 kx2 k2 and the other k3/p3 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K3-0 mini microcode?
A few questions about the k3-0 mini microcode... 1. Does the K3-0 use the same microcode as the K3? 2. are we supposed to keep it in sync with microcode releases? 3. Do the K3-0 and the K3 need to be running the same release? Thanks & 73 de Dave, W5SV __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] WSJT-X Frequency Anomaly
One subtle point is to make certain in CW mode that you have tuned WWV to the carrier frequency and not to one of the transmitted tones. You also must tune to the audio pitch you have set for your sidetone. That is why SPOT is so important. Listen for the WOW-WOW-WOW of the beat note between WWV and your SPOT frequency. Tune the VFO until the WOW-WOW-WOW slows to a stop if possible - then look at the frequency. If it does not have a string of zeros to the right side, adjust the K3 Reference Oscillator as indicated in the manual Calibration Procedures - Use Method 2. I mention this because I have encountered many hams who do not know what zero-beat is. 73, Don W3FPR On 1/18/2019 6:15 PM, Bob McGraw K4TAX wrote: One easy method is place the radio on the CW mode. Time to one of the WWV frequencies. Press the SPOT to activate the function. Any difference between the WWV frequency and the readout is the error. Bob, K4TAX __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] WSJT-X Frequency Anomaly
One easy method is place the radio on the CW mode. Time to one of the WWV frequencies. Press the SPOT to activate the function. Any difference between the WWV frequency and the readout is the error. Bob, K4TAX Sent from my iPhone > On Jan 18, 2019, at 4:42 PM, Mike Harris via Elecraft > wrote: > > Do a sanity check by listening to WWV. That will tell you if your various > radios are telling frequency lies or not. > > The thing to be aware of is that the reference oscillators in the respective > radios will drift. There is a method using WWV in the K3 manual to check and > adjust the REF CAL error. > > Regards, > > Mike VP8NO > >> On 18/01/2019 18:23, Don Wilhelm wrote: >> Note that in the two cases mentioned, you reported 47 +/-1 Hz difference. >> That is not much and can easily be attributed to a difference in the >> calibration of the radio or the audio frequency accuracy of the soundcards. >> 73, >> Don W3FPR >>> On 1/18/2019 12:07 PM, Rick WA6NHC wrote: On 1/18/2019 8:54 AM, Richard wrote: After working a friend on 10 meters with FT8 I phoned and asked him why he always stayed up high at 2454 Hz. He said WSJT-X said he was dead on 2500 Hz. I asked him what it said my frequency was. He said it was 1048 Hz; my WSJT-X said I was dead on 1000 Hz. We did more testing at other frequencies and on other bands and found similar discrepancies. >> __ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to mike.har...@horizon.co.fk > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to rmcg...@blomand.net > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 external mains switch
Exactly!
73,
Bill
K9YEQ
https://wrj-tech.com/
-Original Message-
From: Bob McGraw K4TAX
Sent: Friday, January 18, 2019 4:21 PM
To: Bill Johnson ; elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA500 external mains switch
Bill:
That is my general objective. Having surge protector strips all over the
house has not proven worthwhile. On the other hand, the installation of whole
house surge protection has proven to be much more successful. This also takes
care of switching transits cause by load balancing by the power company.
As to protection for lightning, that's a totally different approach and
methodology. Lightning rods installed on the house, all ground rods bonded
together, copper plumbing to ground system, all services {phone, cable, TV
antenna, satellite dish and etc} connected to the bonded ground system.
Still if there is a direct strike, as we have received, get ready to repair and
replace some stuff. Hopefully, the house is still standing.
73
Bob, K4TAX
On 1/18/2019 3:43 PM, Bill Johnson wrote:
> Bob, totally agree and this is exactly what I have. Main breaker box, whole
> house protection. Lightning is, of course, a whole different conversation
> when it comes to direct hits. Line spikes can wear out motors, take out weak
> power supplies, etc., which the suppressor will protect.
>
> 73,
> Bill
> K9YEQ
>
> https://wrj-tech.com/
>
> -Original Message-
> From: elecraft-boun...@mailman.qth.net
> On Behalf Of Bob McGraw K4TAX
> Sent: Friday, January 18, 2019 10:30 AM
> To: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] KPA500 external mains switch
>
> I have a whole house surge protector installed at the Mains breaker panel.
> Thus I find no need to have individual surge protection for any of the
> equipment locations in the QTH. This takes care of microwave, range,
> furnace, washer, radios, TV's, entertainment systems, phone system and such.
>
> Not sure I like or agree with the idea of a separate mains switch. If for
> remote purposes, remember when turning off the amp via the front power
> switch, one must allow the voltage to bleed down before shutting off the main
> power switch on the rear. {Per the manual} This would seem to be true with
> an external switch.
>
> I've assisted many hams with issue resolution only to find out they have and
> use a "big switch" or otherwise to shut down the station. This IS NOT a good
> idea as many/most microprocessor circuits have provision to save data before
> shutting down equipment. Thus if one uses a "big switch" it kills the DC
> source thus the processor does not have the opportunity to save the data
> status. As to what's left..., sometimes scrambled data, and that's
> where the issues arise.
>
> 73
>
> Bob, K4TAX
>
>
> On 1/18/2019 10:11 AM, Macy monkeys wrote:
>> Is anyone in the US using a separate 220v external mains switch on their
>> KPA500? I'm wondering where these are available. Or is anyone using a 220 v
>> surge protector? Are these available for the NEMA 6-15 plug?
>>
>> John K7FD
>> __
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>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Elecraft@mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net Please help support this
>> email
>> list: http://www.qsl.net/donate.html Message delivered to
>> rmcg...@blomand.net
>>
> __
> Elecraft mailing list
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>
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> list: http://www.qsl.net/donate.html Message delivered to
> k9...@live.com
__
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Re: [Elecraft] WSJT-X Frequency Anomaly
Do a sanity check by listening to WWV. That will tell you if your various radios are telling frequency lies or not. The thing to be aware of is that the reference oscillators in the respective radios will drift. There is a method using WWV in the K3 manual to check and adjust the REF CAL error. Regards, Mike VP8NO On 18/01/2019 18:23, Don Wilhelm wrote: Note that in the two cases mentioned, you reported 47 +/-1 Hz difference. That is not much and can easily be attributed to a difference in the calibration of the radio or the audio frequency accuracy of the soundcards. 73, Don W3FPR On 1/18/2019 12:07 PM, Rick WA6NHC wrote: On 1/18/2019 8:54 AM, Richard wrote: After working a friend on 10 meters with FT8 I phoned and asked him why he always stayed up high at 2454 Hz. He said WSJT-X said he was dead on 2500 Hz. I asked him what it said my frequency was. He said it was 1048 Hz; my WSJT-X said I was dead on 1000 Hz. We did more testing at other frequencies and on other bands and found similar discrepancies. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to mike.har...@horizon.co.fk __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] WSJT-X Frequency Anomaly
There is a Freq Cal mode in WSJT-X. I suggest if the radio or sound card is in question, run this mode and determine the results. Bet you'll be surprised at the inaccuracy of the digital readout on a radio and or soundcard. I was! 73 Bob, K4TAX On 1/18/2019 3:23 PM, Don Wilhelm wrote: Note that in the two cases mentioned, you reported 47 +/-1 Hz difference. That is not much and can easily be attributed to a difference in the calibration of the radio or the audio frequency accuracy of the soundcards. 73, Don W3FPR On 1/18/2019 12:07 PM, Rick WA6NHC wrote: On 1/18/2019 8:54 AM, Richard wrote: After working a friend on 10 meters with FT8 I phoned and asked him why he always stayed up high at 2454 Hz. He said WSJT-X said he was dead on 2500 Hz. I asked him what it said my frequency was. He said it was 1048 Hz; my WSJT-X said I was dead on 1000 Hz. We did more testing at other frequencies and on other bands and found similar discrepancies. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to rmcg...@blomand.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 external mains switch
Bill:
That is my general objective. Having surge protector strips all over
the house has not proven worthwhile. On the other hand, the
installation of whole house surge protection has proven to be much more
successful. This also takes care of switching transits cause by load
balancing by the power company.
As to protection for lightning, that's a totally different approach and
methodology. Lightning rods installed on the house, all ground rods
bonded together, copper plumbing to ground system, all services {phone,
cable, TV antenna, satellite dish and etc} connected to the bonded
ground system.
Still if there is a direct strike, as we have received, get ready to
repair and replace some stuff. Hopefully, the house is still standing.
73
Bob, K4TAX
On 1/18/2019 3:43 PM, Bill Johnson wrote:
Bob, totally agree and this is exactly what I have. Main breaker box, whole
house protection. Lightning is, of course, a whole different conversation when
it comes to direct hits. Line spikes can wear out motors, take out weak power
supplies, etc., which the suppressor will protect.
73,
Bill
K9YEQ
https://wrj-tech.com/
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of Bob McGraw K4TAX
Sent: Friday, January 18, 2019 10:30 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA500 external mains switch
I have a whole house surge protector installed at the Mains breaker panel.
Thus I find no need to have individual surge protection for any of the
equipment locations in the QTH. This takes care of microwave, range, furnace,
washer, radios, TV's, entertainment systems, phone system and such.
Not sure I like or agree with the idea of a separate mains switch. If for
remote purposes, remember when turning off the amp via the front power switch,
one must allow the voltage to bleed down before shutting off the main power
switch on the rear. {Per the manual} This would seem to be true with an
external switch.
I've assisted many hams with issue resolution only to find out they have and use a "big
switch" or otherwise to shut down the station. This IS NOT a good idea as many/most
microprocessor circuits have provision to save data before shutting down equipment. Thus if one
uses a "big switch" it kills the DC source thus the processor does not have the
opportunity to save the data status. As to what's left..., sometimes scrambled data, and
that's where the issues arise.
73
Bob, K4TAX
On 1/18/2019 10:11 AM, Macy monkeys wrote:
Is anyone in the US using a separate 220v external mains switch on their
KPA500? I'm wondering where these are available. Or is anyone using a 220 v
surge protector? Are these available for the NEMA 6-15 plug?
John K7FD
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Re: [Elecraft] KPA500 external mains switch
Bob, totally agree and this is exactly what I have. Main breaker box, whole
house protection. Lightning is, of course, a whole different conversation when
it comes to direct hits. Line spikes can wear out motors, take out weak power
supplies, etc., which the suppressor will protect.
73,
Bill
K9YEQ
https://wrj-tech.com/
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of Bob McGraw K4TAX
Sent: Friday, January 18, 2019 10:30 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA500 external mains switch
I have a whole house surge protector installed at the Mains breaker panel.
Thus I find no need to have individual surge protection for any of the
equipment locations in the QTH. This takes care of microwave, range, furnace,
washer, radios, TV's, entertainment systems, phone system and such.
Not sure I like or agree with the idea of a separate mains switch. If for
remote purposes, remember when turning off the amp via the front power switch,
one must allow the voltage to bleed down before shutting off the main power
switch on the rear. {Per the manual} This would seem to be true with an
external switch.
I've assisted many hams with issue resolution only to find out they have and
use a "big switch" or otherwise to shut down the station. This IS NOT a good
idea as many/most microprocessor circuits have provision to save data before
shutting down equipment. Thus if one uses a "big switch" it kills the DC
source thus the processor does not have the opportunity to save the data
status. As to what's left..., sometimes scrambled data, and that's where
the issues arise.
73
Bob, K4TAX
On 1/18/2019 10:11 AM, Macy monkeys wrote:
> Is anyone in the US using a separate 220v external mains switch on their
> KPA500? I'm wondering where these are available. Or is anyone using a 220 v
> surge protector? Are these available for the NEMA 6-15 plug?
>
> John K7FD
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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> Post: mailto:Elecraft@mailman.qth.net
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> rmcg...@blomand.net
>
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Re: [Elecraft] WSJT-X Frequency Anomaly
Note that in the two cases mentioned, you reported 47 +/-1 Hz difference. That is not much and can easily be attributed to a difference in the calibration of the radio or the audio frequency accuracy of the soundcards. 73, Don W3FPR On 1/18/2019 12:07 PM, Rick WA6NHC wrote: On 1/18/2019 8:54 AM, Richard wrote: After working a friend on 10 meters with FT8 I phoned and asked him why he always stayed up high at 2454 Hz. He said WSJT-X said he was dead on 2500 Hz. I asked him what it said my frequency was. He said it was 1048 Hz; my WSJT-X said I was dead on 1000 Hz. We did more testing at other frequencies and on other bands and found similar discrepancies. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 external mains switch
On 1/18/2019 8:30 AM, Bob McGraw K4TAX wrote: Thus I find no need to have individual surge protection for any of the equipment locations in the QTH. This takes care of microwave, range, furnace, washer, radios, TV's, entertainment systems, phone system and such. IEEE studies have shown that lightning can induce up to 3kV on the branch circuits that make up house wiring. That's a powerful reason for suppressorson branch circuitsto protect equipment! 73, Jim 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] K2 VCO Alignment T5 L30
Thanks a lot Don and Ed, I will be working on it over the weekend and will report back. 73, Tom On Fri, Jan 18, 2019, 10:33 AM Don Wilhelm Tom, > > Normally I would say to spread or compress the turns on T5, but Elecraft > encountered a batch of J310 FETs that do not work very well at Q19 - the > PLL reference oscillator. These troublesome FETs have now been purged > from the Elecraft stock, that the problem should go away going forward. > I am not sure that is your problem, but it is worthy of checking. > > First question is - did you get good frequency readings for the PLL > Reference Oscillator range? If it fails, you see a strange frequency > reading at the high frequency end (when BAND+ is tapped). > Now, the other "funny" thing is that it sometimes checks OK with the > internal counter probe plugged into TP3, but fails when the probe is > removed. > > Under those conditions, the PLL and VFO do not lock together > > So the first thing to try is to solder a 10 to 15pF capacitor between > the source of Q19 and ground. Then between a combination of adjusting > the red turns on T5 and L30 see if you can obtain the correct R30 voltage. > > If that is successful, then all should be well. > > If not successful, get a replacement Q19 from Elecraft. Send the part > number and description to pa...@elecraft.com and ask for a replacement. > > If that does not correct things, then email me and we can go through > some other checks to determine the source of the failure. > > 73, > Don W3FPR > > On 1/18/2019 8:48 AM, K2bew wrote: > > Don et al, > > > > Since I know Don monitors the reflector as well as the support emails, > > rather than email Don directly I thought I would ask the question on here > > because I know I always find it helpful to read other peoples questions > on > > here and Don's answer. > > > > Building the K2 I am at the VCO Alignment voltage check on R30 and > > adjusting L30. > > VFO frequency set at 4000.00 kHz > > I initially got 3.5 volts and bottomed out L30 to get it to 5.5 volts, > and > > then I over screwed it to try to get that last half a volt and ended > > damaging it, so, then I carefully took out L30 and put in a new one. > > > > I also took out T5 and rechecked all the ends for continuity, rewound the > > green wire to space it exactly in the middle of the red winding and > spaced > > everything evenly. I confirmed it is the large yellow core, I have 16 on > > the red wire and 4 on the green (by the way the illustration shows 14 > turns > > of red) . I verified I have R30 as Br-R-Br 120 ohms with both my DVM and > by > > color, and I verified C72 is 271, and I reflowed the solder on both. > > With a new 4.7 inductor (large slot, no red mark) in L30 I now get 2.75 > > volts on the left side of R30 to start with and it bottoms out at 4.5 > volts > > (I was very careful to not bottom it out too hard this time and damage > this > > one, and I have already ordered a couple new ones from Elecraft). > > > > What else can I do to increase that voltage? Would changing the number of > > windings on T5 change it enough to get to 6 volts? > > > > Thank you and 73, > > Tom Bewick K2BEW > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 external mains switch
If lightning is the item of concern, there's bigger fish to fry in that regard. Lightning protection is an entire other story and a very specific approach to lightning mitigation. I use the word "mitigation" to emphasize the point that all efforts for lightning protection is an effort to "minimize" the damage. Notice I didn't say eliminate the damage. Won't happen. I told a friend who had asked "how do I protect my equipment from lightning damage?". My answer; "put it in the box, seal the box, place the box under the bed and hope that a lightning strike isn't the cause for the the house to burn down". Come to think about it " do houses burn up, or do they burn down?" Guess it makes no difference. 73 Bob, K4TAX On 1/18/2019 11:25 AM, Macy monkeys wrote: Yes, lightning was a concern. Regarding an external mains switch, I read in the manual that circuitry remains ON for remote operation when the amp is off. I don't need the circuitry to be on. However... ...it sounds like I need not worry about either! Thanks! John K7FD On Jan 18, 2019, at 8:58 AM, Michael Walker wrote: I John I run a remote and have for over 15 years, a lot of that with Amps like the KPA500. I really don't see a need for a surge protector when you have a real 'torroid' transformer. As for 220VAC switch, I use a 12v relay connected to my RemoteQTH server run by a RPI to turn off the 220AC if I need to. I do do this during the summer in thunderstorm season, but all winter, I never touch it at all. The Amps stays powered by 220VAC. Is there a reason you think you might need one? If you are worried about lightning, it won't help. Mike va3mw On Fri, Jan 18, 2019 at 11:53 AM j...@kk9a.com wrote: You did not specify why you want an external mains switch. I have a 240v surge protector in my electrical panel, it covers the whole house. John KK9A K7FD wrote: Is anyone in the US using a separate 220v external mains switch on their KPA500? I'm wondering where these are available. Or is anyone using a 220 v surge protector? Are these available for the NEMA 6-15 plug? John K7FD __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to va...@portcredit.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to macymonk...@charter.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to rmcg...@blomand.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 external mains switch
Yes, lightning was a concern. Regarding an external mains switch, I read in the manual that circuitry remains ON for remote operation when the amp is off. I don't need the circuitry to be on. However... ...it sounds like I need not worry about either! Thanks! John K7FD > On Jan 18, 2019, at 8:58 AM, Michael Walker wrote: > > I John > > I run a remote and have for over 15 years, a lot of that with Amps like the > KPA500. I really don't see a need for a surge protector when you have a > real 'torroid' transformer. > > As for 220VAC switch, I use a 12v relay connected to my RemoteQTH server > run by a RPI to turn off the 220AC if I need to. I do do this during the > summer in thunderstorm season, but all winter, I never touch it at all. > The Amps stays powered by 220VAC. > > Is there a reason you think you might need one? > > If you are worried about lightning, it won't help. > > Mike va3mw > > >> On Fri, Jan 18, 2019 at 11:53 AM j...@kk9a.com wrote: >> >> You did not specify why you want an external mains switch. I have a 240v >> surge protector in my electrical panel, it covers the whole house. >> >> John KK9A >> >> >> K7FD wrote: >> >> Is anyone in the US using a separate 220v external mains switch on their >> KPA500? I'm wondering where these are available. Or is anyone using a 220 >> v surge protector? Are these available for the NEMA 6-15 plug? >> >> John K7FD >> >> __ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to va...@portcredit.net > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to macymonk...@charter.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] WSJT-X Frequency Anomaly
The obvious first places to look are the calibrations of each radio. My K3 (always one, has the TCXO option) stays within a cycle or two and I can 'net' it to within about a quarter cycle (using the WOW method). Who ever answers on the tone freq I use in FT8 (actually kind of rude because multiple callers cause a mess, use an offset) is typically within one cycle of what I've selected, so it's not a common issue. I'd venture proper calibration hasn't been done within that group. If no one else has done that, your mileage WILL vary. This is the most likely reason since phone folks tend to tolerate frequency variations easier than other modes. The other place is to make sure that the XIT (or second VFO) is not engaged. Rick NHC On 1/18/2019 8:54 AM, Richard wrote: After working a friend on 10 meters with FT8 I phoned and asked him why he always stayed up high at 2454 Hz. He said WSJT-X said he was dead on 2500 Hz. I asked him what it said my frequency was. He said it was 1048 Hz; my WSJT-X said I was dead on 1000 Hz. We did more testing at other frequencies and on other bands and found similar discrepancies. We involved a third station and compared three ways. The results were the same: no agreement anywhere. The radios were my K3s, a TS-990s, and a high-end Yaesu. All of us were using WSJT-X 2.0.0. None of us had RIT or XIT in use. What’s the deal? Is there a way to calibrate the software so the frequency shown by WSJT-X is the frequency upon which we are actually transmitting or receiving? Please keep in mind that none of us is a Paul Horowitz, but neither are we Gomer Pyle… somewhere in between. Cheers. Richard - W4KBX __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to wa6...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 external mains switch
I John I run a remote and have for over 15 years, a lot of that with Amps like the KPA500. I really don't see a need for a surge protector when you have a real 'torroid' transformer. As for 220VAC switch, I use a 12v relay connected to my RemoteQTH server run by a RPI to turn off the 220AC if I need to. I do do this during the summer in thunderstorm season, but all winter, I never touch it at all. The Amps stays powered by 220VAC. Is there a reason you think you might need one? If you are worried about lightning, it won't help. Mike va3mw On Fri, Jan 18, 2019 at 11:53 AM j...@kk9a.com wrote: > You did not specify why you want an external mains switch. I have a 240v > surge protector in my electrical panel, it covers the whole house. > > John KK9A > > > K7FD wrote: > > Is anyone in the US using a separate 220v external mains switch on their > KPA500? I'm wondering where these are available. Or is anyone using a 220 > v surge protector? Are these available for the NEMA 6-15 plug? > > John K7FD > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to va...@portcredit.net > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] WSJT-X Frequency Anomaly
After working a friend on 10 meters with FT8 I phoned and asked him why he always stayed up high at 2454 Hz. He said WSJT-X said he was dead on 2500 Hz. I asked him what it said my frequency was. He said it was 1048 Hz; my WSJT-X said I was dead on 1000 Hz. We did more testing at other frequencies and on other bands and found similar discrepancies. We involved a third station and compared three ways. The results were the same: no agreement anywhere. The radios were my K3s, a TS-990s, and a high-end Yaesu. All of us were using WSJT-X 2.0.0. None of us had RIT or XIT in use. What’s the deal? Is there a way to calibrate the software so the frequency shown by WSJT-X is the frequency upon which we are actually transmitting or receiving? Please keep in mind that none of us is a Paul Horowitz, but neither are we Gomer Pyle… somewhere in between. Cheers. Richard - W4KBX __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] KPA500 external mains switch
You did not specify why you want an external mains switch. I have a 240v surge protector in my electrical panel, it covers the whole house. John KK9A K7FD wrote: Is anyone in the US using a separate 220v external mains switch on their KPA500? I'm wondering where these are available. Or is anyone using a 220 v surge protector? Are these available for the NEMA 6-15 plug? John K7FD __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 external mains switch
I have a whole house surge protector installed at the Mains breaker
panel. Thus I find no need to have individual surge protection for any
of the equipment locations in the QTH. This takes care of microwave,
range, furnace, washer, radios, TV's, entertainment systems, phone
system and such.
Not sure I like or agree with the idea of a separate mains switch. If
for remote purposes, remember when turning off the amp via the front
power switch, one must allow the voltage to bleed down before shutting
off the main power switch on the rear. {Per the manual} This would
seem to be true with an external switch.
I've assisted many hams with issue resolution only to find out they have
and use a "big switch" or otherwise to shut down the station. This IS
NOT a good idea as many/most microprocessor circuits have provision to
save data before shutting down equipment. Thus if one uses a "big
switch" it kills the DC source thus the processor does not have the
opportunity to save the data status. As to what's left...,
sometimes scrambled data, and that's where the issues arise.
73
Bob, K4TAX
On 1/18/2019 10:11 AM, Macy monkeys wrote:
Is anyone in the US using a separate 220v external mains switch on their
KPA500? I'm wondering where these are available. Or is anyone using a 220 v
surge protector? Are these available for the NEMA 6-15 plug?
John K7FD
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[Elecraft] KPA500 external mains switch
Is anyone in the US using a separate 220v external mains switch on their KPA500? I'm wondering where these are available. Or is anyone using a 220 v surge protector? Are these available for the NEMA 6-15 plug? John K7FD __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K2 VCO Alignment T5 L30
Tom, Normally I would say to spread or compress the turns on T5, but Elecraft encountered a batch of J310 FETs that do not work very well at Q19 - the PLL reference oscillator. These troublesome FETs have now been purged from the Elecraft stock, that the problem should go away going forward. I am not sure that is your problem, but it is worthy of checking. First question is - did you get good frequency readings for the PLL Reference Oscillator range? If it fails, you see a strange frequency reading at the high frequency end (when BAND+ is tapped). Now, the other "funny" thing is that it sometimes checks OK with the internal counter probe plugged into TP3, but fails when the probe is removed. Under those conditions, the PLL and VFO do not lock together So the first thing to try is to solder a 10 to 15pF capacitor between the source of Q19 and ground. Then between a combination of adjusting the red turns on T5 and L30 see if you can obtain the correct R30 voltage. If that is successful, then all should be well. If not successful, get a replacement Q19 from Elecraft. Send the part number and description to pa...@elecraft.com and ask for a replacement. If that does not correct things, then email me and we can go through some other checks to determine the source of the failure. 73, Don W3FPR On 1/18/2019 8:48 AM, K2bew wrote: Don et al, Since I know Don monitors the reflector as well as the support emails, rather than email Don directly I thought I would ask the question on here because I know I always find it helpful to read other peoples questions on here and Don's answer. Building the K2 I am at the VCO Alignment voltage check on R30 and adjusting L30. VFO frequency set at 4000.00 kHz I initially got 3.5 volts and bottomed out L30 to get it to 5.5 volts, and then I over screwed it to try to get that last half a volt and ended damaging it, so, then I carefully took out L30 and put in a new one. I also took out T5 and rechecked all the ends for continuity, rewound the green wire to space it exactly in the middle of the red winding and spaced everything evenly. I confirmed it is the large yellow core, I have 16 on the red wire and 4 on the green (by the way the illustration shows 14 turns of red) . I verified I have R30 as Br-R-Br 120 ohms with both my DVM and by color, and I verified C72 is 271, and I reflowed the solder on both. With a new 4.7 inductor (large slot, no red mark) in L30 I now get 2.75 volts on the left side of R30 to start with and it bottoms out at 4.5 volts (I was very careful to not bottom it out too hard this time and damage this one, and I have already ordered a couple new ones from Elecraft). What else can I do to increase that voltage? Would changing the number of windings on T5 change it enough to get to 6 volts? Thank you and 73, Tom Bewick K2BEW __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K2 VCO Alignment T5 L30
Don et al, Since I know Don monitors the reflector as well as the support emails, rather than email Don directly I thought I would ask the question on here because I know I always find it helpful to read other peoples questions on here and Don's answer. Building the K2 I am at the VCO Alignment voltage check on R30 and adjusting L30. VFO frequency set at 4000.00 kHz I initially got 3.5 volts and bottomed out L30 to get it to 5.5 volts, and then I over screwed it to try to get that last half a volt and ended damaging it, so, then I carefully took out L30 and put in a new one. I also took out T5 and rechecked all the ends for continuity, rewound the green wire to space it exactly in the middle of the red winding and spaced everything evenly. I confirmed it is the large yellow core, I have 16 on the red wire and 4 on the green (by the way the illustration shows 14 turns of red) . I verified I have R30 as Br-R-Br 120 ohms with both my DVM and by color, and I verified C72 is 271, and I reflowed the solder on both. With a new 4.7 inductor (large slot, no red mark) in L30 I now get 2.75 volts on the left side of R30 to start with and it bottoms out at 4.5 volts (I was very careful to not bottom it out too hard this time and damage this one, and I have already ordered a couple new ones from Elecraft). What else can I do to increase that voltage? Would changing the number of windings on T5 change it enough to get to 6 volts? Thank you and 73, Tom Bewick K2BEW __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Sorta OT - assistive technology assistance needed
Quick and dirty solution is to use PC out to one channel of stereo headphones and radio out to the other channel. Then if needed amplify via small low cost stereo amp. -- Sent from: http://elecraft.365791.n2.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 Message delivered to arch...@mail-archive.com
