[QRP-L] ANNOUNCEMENT: QRP-ARCI SILENT KEY MEMORIAL
2007 QRP-ARCI(sm) Silent Key Memorial Sprint Purpose: Our contest celebrates and honors the QRP luminaries who no longer answer CQ's. Those generous people who graciously donated to the QRP community their time, effort and knowledge to advance the premise that more fun could be had using less than 5 watts. Some were irascible and some were even considered curmudgeons but when you took a keen look at their accomplishments and listened to those who knew them well you discovered truly wonderful people who would give you their last diode. The people we are celebrating are well known among the QRP Community. Some passed recently and some have enjoyed their reward many years. They are not forgotten for their accomplishments live on either on the bands, the internet, through published works or organizations that benefited from their largess. This contest celebrates ALL SK's who now call CQ from above, where all sigs are 599 and all contacts QSL 100%. Celebrate the many SKs that we have known and loved in years past. Date/Time: 1500Z to 1800Z on 18 August 2007. Mode: CW Only Exchange: Members send: RST, State/Province/Country, ARCI member number Non-Members send: RST, State/Province/Country, Power Out QSO Points: Member = 5 points Non-Member, Different Continent = 4 points Non-Member, Same Continent = 2 points Multiplier: SPC (State/Province/Country) total for all bands. The same station may be worked on multiple bands for QSO points and SPC credit. Power Multiplier: 5 Watts = x1 1 - 5 Watts = x7 250 mW - 1 Watt = x10 55 mW - 250 mW = x15 55 mW = x20 Suggested Frequencies: 160m1810 kHz 80m 3560 kHz 40m 7030 kHz (please listen at 7040 kHz for rock bound participants) 20m 14060 kHz 15m 21060 kHz 10m 28060 kHz Score: Final Score = Points (total for all bands) x SPCs (total for all bands) x Power Multiplier + Bonus Points. Bonus Points: If you are operating PORTABLE using battery power AND a temporary antenna, add 5000 points to your final score. (You can NOT be at your shack operating from battery power using your home station antenna to qualify for this bonus.) This is to help level the playing field for contesters who work from the field against contest stations with 5 element yagis at 70 ft. Categories: Entry may be All-Band, Single Band, High Bands (10m-15m-20m) or Low Bands (40m-80m-160m) How to Participate: Get on any of the HF bands except the WARC bands and hang out near the QRP frequencies. Work as many stations calling CQ QRP or CQ TEST as possible, or call CQ QRP or CQ TEST yourself! You can work a station for credit once on each band. Email Log Submission: Submit Logs in plain text format along with a summary stating your Callsign, Entry Category, Actual Power and Station Description along with score calculation to [EMAIL PROTECTED] Snail mail Log Submission: Submit Logs along with a summary stating your Callsign, Entry Category, Actual Power and Station Description along with score calculation to: Silent Key Memorial Sprint c/o Jeff Hetherington, VA3JFF 139 Elizabeth St. W. Welland, Ontario Canada L3C 4M3 Deadline: Entries must be postmarked on or before 18 September 2007. Results: Will be published in QRP Quarterly and shown on the QRP-ARCI website. Certificates: Will be awarded to the top scoring entrant in each category. Certificates may be awarded for 2nd and 3rd place if entries are sufficient in a category. == L. Jeffrey Hetherington - VA3JFF / VE3CW QRP-ARCI(sm) Contest Manager QRP-ARCI(sm) #9223 / K2 #3375 / KX1 #631 Be smarter than spam. See how smart SpamGuard is at giving junk email the boot with the All-new Yahoo! Mail at http://mrd.mail.yahoo.com/try_beta?.intl=ca __ QRP-L mailing list Home: http://mailman.qth.net/mailman/listinfo/qrp-l Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[EMAIL PROTECTED]
Re: [Elecraft] Remote PC Control...
hi Steve, I know and have tried a software that can do what you want. look at: http://www.lynovation.com/ you will find hardware and software to accomplish your tasks. The server program runs on your desktop PC, the K2 is connected via the Com-port, Bluetooth needs a hardware dongle if you want this. There is a PC and a Pocket PC program to control the radio. For you with the laptop the PC program will be the right one. Access to remote control is via TCP/IP. If you want additional remotely listen to the radio you can use Skype or similar programs. 73! de Werner OE9FWV On 15 Aug 2007 at 16:54, STEPHEN W BANKS wrote: Hello Everyone, A few weeks ago I inquired whether anyone knew of a good -- preferably free or low-cost -- software that ran well, and which seemed to do a good job using the internet for remotely controlling my desktop PC and my K2/100 from my remote laptop. The idea mirrors an article from the April, 2007 issue of QST Magazine. There were a couple of comments offered, but being of the Dumb Thumbs school of thought which I am, I wasn't able follow up very successfully. (A persistent air-gap in the system -- possibly my firewall -- follows me around everywhere I go.) My idea ultimately is to be able to remotely control my K2/100 via its KI02 accessory port. The K2 is physically connected my desktop PC, and I occasionally run it using Ham Radio Deluxe. My DSL service would be the means of connecting things together. It seems that using Ham Radio Deluxe S/W has the potential to do this, but so far I've been unsuccessful in doing so. If anyone cares to comment I'd appreciate your thoughts, particularly if you've succeeded in getting HRD to do the job I have in mind.. Tnx es 73, Steve Banks K0PQ -- TV -- You can feel it suck out your brain PGP-Key: http://www.qsl.net/oe9fwv/furlan.asc Fone +43 5522 75013 Fax +43 820 555 85 2621 Mobile +43 664 6340014 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] external soundcards for digimodes
My own interest in the K3 is principally (but not exclusively) the digimodes. For that reason I was interested in the suggestion of Simon, HB9DRV that there might be an operational gain in using a better sound card than that on the PC motherboard. I don't know enough about computing to make judgements, and it would help me (and others in my position) if more knowledgeable and experienced folk on the list could offer advice on the following questions. Q1.Does experience suggest that there can be an observable operational gain in using a sound card different from that built into the PC? Q2.Which published technical specifications of a sound card are relevant to digimode operation? Q3.On the basis of the answer to Q2, how does one judge whether one sound card is better than another for digimode operation? Q4.Do list members have specific recommendations for cost-effective external sound cards? (The sound card suggested by Simon costs around as much in the UK as the 100W upgrade for the basic K3.) 73 Chris, MØPSK ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] external soundcards for digimodes
I've tacked answers into your post. - Original Message - From: Chris Gibson [EMAIL PROTECTED] Q1.Does experience suggest that there can be an observable operational gain in using a sound card different from that built into the PC? DRV Depends on built-in card, laptops are usually foul as are soundcards on the motherboard in general (generalisation). Q2.Which published technical specifications of a sound card are relevant to digimode operation? DRV Dynamic range, for example: http://www.m-audio.com/products/en_us/Delta44-focus.html Q3.On the basis of the answer to Q2, how does one judge whether one sound card is better than another for digimode operation? DRV Less intermod, less noise, less spurious signals. Less problems due to strong adjacent signals. Q4.Do list members have specific recommendations for cost-effective external sound cards? (The sound card suggested by Simon costs around as much in the UK as the 100W upgrade for the basic K3.) DRV External is a good idea as you can take it with you and it avoids noise from the PC. SignaLink USB is good enough, don't know whether there is a K3 cable yet. FWIW the Delta-44 is GBP85 in the UK. 73 Chris, MØPSK ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] external soundcards for digimodes
On 8/16/07, Chris Gibson [EMAIL PROTECTED] wrote: [snip] Q4.Do list members have specific recommendations for cost-effective external sound cards? (The sound card suggested by Simon costs around as much in the UK as the 100W upgrade for the basic K3.) To be honest, notwithstanding Simon's comments, I'm skeptical of the benefit of using an external sound card for ordinary data modes. There are documented benefits for using one for SDR, but that is another matter. I admit I have never tried using a laptop for radio use, but the sound card chips on the laptop motherboards seem to be the same as those used on desktop motherboards so I can't imagine it makes much difference. I find I can get pretty good copy of PSK31 (and CW, come to that) using a Dell Axim PDA running PocketDigi sitting next to the K2 in its cradle and receiving the audio from the loudspeaker via its built-in microphone. Obviously, the copy isn't as good as on the PC with a direct connection. But I think it shows that for modes like that, the quality of the input really isn't that critical. I've seen greater differences between different decoding programs. I think MixW is slightly better than programs that use the PSK Core DLL, for example. There are arguments for using an external sound card, such as being able to keep the built-in sound card for other uses. But I wouldn't go splashing out on an external sound card just on the suggestion that it might give better results. Chances are, it will make no discernible difference. -- Julian, G4ILO K2 s/n: 392 K3 s/n: ??? G4ILO's Shack: www.g4ilo.com Ham-Directory: www.ham-directory.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] external soundcards for digimodes
Chris, Typically, the more bits in the Soundcard A-D conversion, the better the dynamic range. There is also the noise floor of the soundcard to consider. Most internal soundcards are 16 bit while the upgrades are typically 24 bits for the A-D. The Soundblaster Live or Soundblaster Audiogy are good alternatives IMHO, are available in USB connected external versions as well as internal cards and will do a good job overall. They are a bit more noisy than the Delta-44, but not a pricey. Depending on your applications and your OS, there may be some differences in the drivers available - check the various forums to get a feeling for any troublespots - the SDR forums are a good resource for that information. I doubt that you will notice a great difference with the better cards for most data modes, although your receiving noise floor could be improved with a good 24 bit card. If you have interest in Software Defined Radio, go for the best you can find that fits within your budget. 73, Don W3FPR Chris Gibson wrote: My own interest in the K3 is principally (but not exclusively) the digimodes. For that reason I was interested in the suggestion of Simon, HB9DRV that there might be an operational gain in using a better sound card than that on the PC motherboard. I don't know enough about computing to make judgements, and it would help me (and others in my position) if more knowledgeable and experienced folk on the list could offer advice on the following questions. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] external soundcards for digimodes
In casual operation, I doubt you'll see much difference. However, if you are planning on operating during a contest, or otherwise want to use a wide audio path (SSB bandwidth) with AGC OFF (so strong stations don't smother weak ones via AGC action) and with lots of signals simultaneously present, then you'll want a system with very low IMD. The least expensive soundcard that I own that does a reasonable job with SDR (and by extension should do a reasonable job under the conditions I described) is the Creative Soundblaster MP3+. This is a USB-based widget, and you can buy these from Creative's online shop, refurbished, for $14.99. 73, Lyle KK7P ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K2 PLL range test failure
Hi - I'm part way through building a K2 (previously, I have built a KX1, which was a success). On the K2, I am on the Alignment and Test, Part II section where the PLL reference oscillator range test is performed using the probe connected to TP3. This is on page 63 of the guide. Unfortunately, my numbers don't look good. The Ref. High Freq is 12109.52 and the Ref. Low Freq is 12107.88 (the difference is just 1.64kHz, far below the acceptable range of 9.8 and 15kHz). In particular, I was expecting the low freq. to be 12080-12090. Everything else is ok up to this point, eg C22 trim to 4MHz was fine, and the control board, front panel etc are all working fine, as far as I am aware. I am not sure what to try in terms of diagnosis on this. So far I've retraced all the steps building on the RF board (and actually found a mis-placed capacitor, so that's fixed). I've also cleaned the board in case it's that, although I must stress I am not using water based solder, just a quality lead/tin solder. However, after all this (and with high hopes!) I powered up again and got the same numbers. I have been wondering if the thermistor board could be involved. It is a tight fit and I suppose I might have damaged (ESD or heat) something. Any suggestions gratefully received, I'm stuck! 73 Michael G7VJR ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Remote-control follow up...
Hello Everyone, I received about a dozen REALLY HELPFUL replies to my post from August 15. I'll be out-of-town for a couple of days in Aspen, CO. However, early next week I'll get back to doing the necessary downloads to (hopefully) implement remote-control of my K2/100. Thanks to all -- I'll keep the list posted. 73, Steve Banks K0PQ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] KPA100 option almost done...
Well after about a month, I almost have my KPA100 option finished for the K2. I didn't accurately time the hours, but I think it is in the 25 hour region. This is the first serious kit I've built in years and the most serious ever. I had only one mistake to correct. U7, the dual op amp, was reversed. Once that got replaced, the amp came to life. I have a couple of issues left, minor ones. 1. The power does seem to vary a little bit on key down, nothing major, but a few percent before the power level settles. The TUNE function indicates 1.5:1 SWR into a dummy load. Perhaps I need to go back and retweak the SWR setting. 2. The speaker sounds like the cone is bad. I ordered a bunch of parts from Elecraft, but the speaker slipped my mind. I will need to remove the shield if the speaker gets replaced. Does the adhesive comes loose easily? Thanks for all help from this reflector! 73, Steve N6VL ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] external soundcards for digimodes
At 09:08 AM 8/16/2007, Don Wilhelm wrote: Typically, the more bits in the Soundcard A-D conversion, the better the dynamic range. There is also the noise floor of the soundcard to consider. Most internal soundcards are 16 bit while the upgrades are typically 24 bits for the A-D. Obviously, the performance specs for a 24-bit sound card should be better than for a 16-bit card. However, in his review of sound cards for Amateur Radio that appeared in the May 2007 QST, Jonathan Taylor, K1RFD wrote that very few digital-mode apps are designed to take advantage of the higher precision when it is available. Does anyone know which software apps actually do make use of the extra bits and the higher performance of a 24-bit sound card? 73, Mike K1MK Michael Keane K1MK [EMAIL PROTECTED] ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] OT. RF (invisible) dog fence.
If anyone has had any experience with invisible RF dog fences please drop me an email at [EMAIL PROTECTED] I am concerned about RF getting into the dog fence and RFI from the dog fence. TNX. 73, Jozef WB2MIC ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] external soundcards for digimodes
Obviously, the performance specs for a 24-bit sound card should be better than for a 16-bit card. Does anyone know which software apps actually do make use of the extra bits and the higher performance of a 24-bit sound card? There is not much that can be done in the application to take advantage of the 24 bit sound cards. All of the devices are limited on the strong signal end of the spectrum by their power supply (typically 5 volt) which limits the signal to the ADC to about 4.5 volts p-p. On the low signal end, the digital software is limited by the noise level from a quiet band (receiver IF noise, atmospheric noise, etc.) at the receiver output. From memory, most receivers I've seen show composite noise floors about 80 dB below their peak output (peak output is generally around 200 mV average or somewhat less than 1 volt p-p) with no antenna and quiet band noise around 70 dB below maximum output. Even if the DSP algorithms in the digital software could get 10 dB below the noise, the 16 bit sound cards with their 95 to 97 dB theoretical dynamic range would be more than enough for most amateur work at HF. They key to getting everything you can with soundcard modes on HF is having a very low noise audio amplifier between the receiver and ADC (it may be in the soundcard) and minimizing any power supply and logic noise in the sound card. If you will be using AGC and narrow filters in the receiver (one key to maximum weak signal effectiveness), the receiver AGC will limit the dynamic range into the sound card to well less than 40 dB (the difference between MDS and AGC threshold) in any case. You want the peak audio to be as close to the 4 V p-p point as possible to make maximum use of the sound card's available dynamic range as you can. If the maximum signal to the ADC is only one volt p-p you have already given away 12 dB of DR! 73, ... Joe, W4TV -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Michael Keane K1MK Sent: Thursday, August 16, 2007 11:49 AM To: Elecraft Reflector Subject: Re: [Elecraft] external soundcards for digimodes At 09:08 AM 8/16/2007, Don Wilhelm wrote: Typically, the more bits in the Soundcard A-D conversion, the better the dynamic range. There is also the noise floor of the soundcard to consider. Most internal soundcards are 16 bit while the upgrades are typically 24 bits for the A-D. Obviously, the performance specs for a 24-bit sound card should be better than for a 16-bit card. However, in his review of sound cards for Amateur Radio that appeared in the May 2007 QST, Jonathan Taylor, K1RFD wrote that very few digital-mode apps are designed to take advantage of the higher precision when it is available. Does anyone know which software apps actually do make use of the extra bits and the higher performance of a 24-bit sound card? 73, Mike K1MK Michael Keane K1MK [EMAIL PROTECTED] ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] external soundcards for digimodes
The SSM2165 is a good speech compressor and not expensive. I'm assuming it will work on data? to bring up the level as required. You can get a complete kit from www.box73.com DYC-817 (Code 734980) External dynamic compressor kit for FT-817. Or from OK1CDJ, but I can't find the link at the moment. This will incur some extra noise, but there are components to adjust to optimise compression etc. David G3UNA - Original Message - From: Joe Subich, W4TV [EMAIL PROTECTED] To: 'Michael Keane K1MK' [EMAIL PROTECTED]; 'Elecraft Reflector' elecraft@mailman.qth.net Sent: Thursday, August 16, 2007 5:50 PM Subject: RE: [Elecraft] external soundcards for digimodes Obviously, the performance specs for a 24-bit sound card should be better than for a 16-bit card. Does anyone know which software apps actually do make use of the extra bits and the higher performance of a 24-bit sound card? There is not much that can be done in the application to take advantage of the 24 bit sound cards. All of the devices are limited on the strong signal end of the spectrum by their power supply (typically 5 volt) which limits the signal to the ADC to about 4.5 volts p-p. On the low signal end, the digital software is limited by the noise level from a quiet band (receiver IF noise, atmospheric noise, etc.) at the receiver output. From memory, most receivers I've seen show composite noise floors about 80 dB below their peak output (peak output is generally around 200 mV average or somewhat less than 1 volt p-p) with no antenna and quiet band noise around 70 dB below maximum output. Even if the DSP algorithms in the digital software could get 10 dB below the noise, the 16 bit sound cards with their 95 to 97 dB theoretical dynamic range would be more than enough for most amateur work at HF. They key to getting everything you can with soundcard modes on HF is having a very low noise audio amplifier between the receiver and ADC (it may be in the soundcard) and minimizing any power supply and logic noise in the sound card. If you will be using AGC and narrow filters in the receiver (one key to maximum weak signal effectiveness), the receiver AGC will limit the dynamic range into the sound card to well less than 40 dB (the difference between MDS and AGC threshold) in any case. You want the peak audio to be as close to the 4 V p-p point as possible to make maximum use of the sound card's available dynamic range as you can. If the maximum signal to the ADC is only one volt p-p you have already given away 12 dB of DR! 73, ... Joe, W4TV -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Michael Keane K1MK Sent: Thursday, August 16, 2007 11:49 AM To: Elecraft Reflector Subject: Re: [Elecraft] external soundcards for digimodes At 09:08 AM 8/16/2007, Don Wilhelm wrote: Typically, the more bits in the Soundcard A-D conversion, the better the dynamic range. There is also the noise floor of the soundcard to consider. Most internal soundcards are 16 bit while the upgrades are typically 24 bits for the A-D. Obviously, the performance specs for a 24-bit sound card should be better than for a 16-bit card. However, in his review of sound cards for Amateur Radio that appeared in the May 2007 QST, Jonathan Taylor, K1RFD wrote that very few digital-mode apps are designed to take advantage of the higher precision when it is available. Does anyone know which software apps actually do make use of the extra bits and the higher performance of a 24-bit sound card? 73, Mike K1MK Michael Keane K1MK [EMAIL PROTECTED] ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] OT. RF (invisible) dog fence.
On Thu, 16 Aug 2007, Jim Brown wrote: On Thu, 16 Aug 2007 12:14:06 -0400, Jozef Hand-Boniakowski wrote: and RFI from the dog fence I would think the other concern/monitor might be the dogas I understand the fences, the dog receives a shock from the collar when it gets too close/goes over the boundry line created by the fence. If your transmitted signal sets off the collar, the dog will be unhappy. Not sure what would make the dog the unhappiest, SSB or CW. 73 k3hrn Thom,EIEIO Email, Internet, Electronic Information Officer www.baltimorehon.com/Home of the Baltimore Lexicon www.tlchost.net/hosting/ Web Hosting as low as 3.49/month ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K2 PLL range test failure
Michael, First check RP2, D16, D17 and R19 for correct values and good soldering - in the case of the varactors, be certain they are oriented correctly. If there is still a problem, try to narrow it down to the source. With the K2 menu set for CAL FCTR, measure the DC voltage at RF Board U6 pin 3 - when you tap the BAND+ button, the voltage should rise to about 4 volts, and when you tap the BAND- button it should reduce to almost zero volts. If so, the DAC (U5) is functioning correctly and you can move on to the next point which is U6 pin 1. U6 pin 1 should have almost 2 times the voltage seen at U6 pin 3 - so tap the BAND+ button and see if it goes up to about 8 volts, and tap BAND- to see if it goes to zero (or close to zero). If that is happening, the thermistor board is likely OK and the problem lies with R19, RP2, D16 or D17, L31 or perhaps even the crystal X1. A separate check on the 'health' of the thermistor board is to check the voltage at U6 pin 5. It should be very near 4 volts - if it is not, you likely have a solder bridge on the thermistor board. Look carefully where RE and RC have their ends near each other. There should be no connection between these two resistors at that point, but the solder pads are quite close and easy to bridge with solder. You can often gain adequate visibility and access to the back of the thermistor board without removing it by removing the front panel and Control Board. 73, Don W3FPR Michael Wells G7VJR wrote: Hi - I'm part way through building a K2 (previously, I have built a KX1, which was a success). On the K2, I am on the Alignment and Test, Part II section where the PLL reference oscillator range test is performed using the probe connected to TP3. This is on page 63 of the guide. Unfortunately, my numbers don't look good. The Ref. High Freq is 12109.52 and the Ref. Low Freq is 12107.88 (the difference is just 1.64kHz, far below the acceptable range of 9.8 and 15kHz). In particular, I was expecting the low freq. to be 12080-12090. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] KPA100 option almost done...
Steve, If your dummy load is indeed a 50 ohm non-reactive load at the frequency of operation, it should indicate a 1:1 SWR if you used it when you balanced the wattmeter (C1 adjustment). Adjust C1 with an insulated screwdriver because both ends of the trimmer cap are above ground and a mettalic adjustment tool in the slot will change the capacitance. If you have any doubt about your dummy load, borrow an antenna analyzer and measure it at the frequency of interest. As for the speaker, the shield will not release easily - you may want to consider ordering another shield too if replacement is in order. Sometimes the speaker frame becomes distorted during shipping - often that can be detected by gently prying upward on the 4 frame webs while listening to the speaker - if the fuzziness goes away when gently prying one web, apply a bit more pressure in an attempt to form the frame a bit and get it to work satisfactorily. When evaluating the sound of the speaker, do not lay the KPA100 upside down on a flat surface - the surface reflects some of the sound and can actually make it sound terrible even though all is well. 73, Don W3FPR Steve Kallal wrote: Well after about a month, I almost have my KPA100 option finished for the K2. I didn't accurately time the hours, but I think it is in the 25 hour region. This is the first serious kit I've built in years and the most serious ever. I had only one mistake to correct. U7, the dual op amp, was reversed. Once that got replaced, the amp came to life. I have a couple of issues left, minor ones. 1. The power does seem to vary a little bit on key down, nothing major, but a few percent before the power level settles. The TUNE function indicates 1.5:1 SWR into a dummy load. Perhaps I need to go back and retweak the SWR setting. 2. The speaker sounds like the cone is bad. I ordered a bunch of parts from Elecraft, but the speaker slipped my mind. I will need to remove the shield if the speaker gets replaced. Does the adhesive comes loose easily? Thanks for all help from this reflector! 73, Steve N6VL ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K2 keyer autodetect mode
I've always thought this was pretty neat - I could pull out the paddles and plug in the (suitably wired) straight key and not have to mess with the menu settings. It occurred to me that I could even have both plugged in at the same time and go back and forth (though my desk space doesn't really provide for this). When I started exploring computer keying, it was clear that I needed something to allow me to have both the computer cable and paddles plugged in at the same time. Gee, while I was at it, wouldn't it be nice to be able to leave computer, bug, straight key *and* paddles plugged in at once? Sure. That would be easy; the K2 manual basically gives the required hits. But making it small was the problem (see above comments about desk space). After several trial orders of parts, I discovered that you can make it pretty darn small. Four Switchcraft 35RAPC2BH3 horizontal mini stereo jacks can be crammed into a Serpac C-4 enclosure. Just. The terminal spacings aren't quite right for .100 perfboard, so I wired it up ugly style, using magnet wire for the bus connections. Two diodes, a few 1/4 holes, a 6 stereo extension cord pigtail and a grommet and ... just what I wanted! Thought I'd pass this along, mostly to get the part numbers into the archives. 73 de chris K6DBG ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] N2CQ QRP Contest Calendar: Aug 16 - Sep 17, 2007
~ N2CQ QRP CONTEST CALENDAR August 16 - Sept 17, 2007 ~ Summer FOX Hunt - QRP 20M CW UTC: Every Fri thru Sept 7, 0100z to 0229z EDT: Every Thur thru Sept 6, 9 PM to 1029 PM Info: http://www.qrpfoxhunt.org/ ~ SARTG WW RTTY Contest ... Low Power Category Aug 18, z to 0800z Aug 18, 1600z to 2400z Aug 19, 0800z to 1600z Rules: http://www.sartg.com/contest/wwrules.htm ~ QRP ARCI Silent Key Memorial Contest (CW) *** QRP CONTEST! *** Aug 18, 1500z to 1800z Rules: http://www.qrparci.org ~ North American QSO Party (SSB) ... 100W Max. (/QRP noted on entry) Aug 18, 1800z to Aug 19, 0600z Rules: http://www.ncjweb.com/naqprules.php ~ NJ QSO Party (CW/SSB) Aug 18, 2000z to Aug 19, 0700z Aug 19, 1300z to Aug 20, 0200z Rules: http://www.qsl.net/w2rj/ ~ RUN FOR THE BACON (CW) *** QRP CONTEST *** EDT: Aug 19, 9 PM to 11 PM UTC: Aug 20, 0100z 0300z Rules: http://www.gentzow.com/fpqrp/ ~ Hawaii QSO Party (CW/SSB/Digital) ... QRP Category Aug 25, 0700z to Aug 26, 2200z Rules: http://www.karc.us/hi_qso_party.html ~ Ohio QSO Party (CW/SSB) ... QRP Category Aug 25, 1600z to Aug 26, 0400z Rules: http://www.oqp.us/ ~ SLOVENIA CONTEST CLUB RTTY Championship .. 100W Category Aug 25, 1200z to Aug 26, 1159z Rules: http://lea.hamradio.si/~scc/rtty/htmlrules.htm ~ SKCC Weekend Sprint (Straight Key CW) ... QRP Category Aug 26, z to z Rules: http://www.iglou.com/sonic//skcc/wknd-sprint-rules.html ~ QRP BARBERSHOP QUARTET CONTEST (CW QRP)... QRP Contest! Aug 29, 9 PM to 11 PM EDT Rules: http://www.io.com/~n5fc/barbershop_contest.htm ~ Wake-Up! QRP Sprint (CW) *** QRP Contest *** Sep 01, 0400z to 0600z Rules: http://www.qrp.ru/sprint_e.htm ~ IARU Region 1 Fieldday (SSB)... QRP Category Sep 01, 1300z to Sep 02, 1259z Rules: http://www.sk3bg.se/contest/iarur1fd.htm ~ AGCW Straight Key Party (CW - 40 Meters) ... QRP Category Sep 01, 1300z to 1600z Rules: http://www.agcw.org/agcw-con/2007/Englisch/htp_e.htm ~ Michigan QRP Labor Day Sprint (CW) *** QRP CONTEST! *** Sep 03, 2300z to Sep 04, 0300z Rules: http://www.qsl.net/miqrpclub/contest.html ~ Adventure Radio Spartan Sprint (CW) *** QRP CONTEST! *** Sep 04, 0100z to 0300z (First Monday 9 PM EDT) Rules: http://www.arsqrp.com/ ~ FISTS G3ZQS Memorial Straight Key Contest ... QRP Category Sep 07, 2300z to Sep 09, 2300z Rules: http://www.fists.org/straightkey.html ~ Worked All Europe DX Contest (SSB) 100W Power Category Sep 08, z to Sep 09, 2400z Rules: http://www.darc.de/referate/dx/xedcwr.htm ~ Swiss HTC QRP Sprint (CW) *** QRP Contest *** Sep 08, 1300z to 1900z Rules: http://www.htc.ch/de/htc_sprint_contest.htm or: http://www.sk3bg.se/contest/htcqrpsp.htm ~ Arkansas QSO Party (CW/SSB/PSK31) ... QRP Category Sep 08, 1400z to Sep 09, 0600z and Sep 09, 1500z to Sep 09, 2400z Rules: http://www.arkan.us/ ~ ARRL September VHF QSO Party (All) Low Power Category Sep 08, 1800z to Sep 10, 0300z Rules: http://www.arrl.org/contests/calendar.html?year=2007 ~ Second Class Operator Club Marathon (CW) *** QRP Contest *** Sep 08, 1800z to 2400z Rules: http://www.qsl.net/soc/contests.htm#top ~ NA Sprint (CW)... QRP Category Sep 9, z to 0400z Rules: http://www.ncjweb.com/sprintrules.php ~ Tennessee QSO Party (SSB/CW/Dig) ... QRP Category Sep 9, 1800z to Sep 10, 0100z Rules: http://www.k4ro.net/tcg.html ~ End of Summer Digital Sprint *** QRP Contest *** Sep 9, 2000z to 2359z Rules: http://www.qrparci.org
Re: [Elecraft] PLL Clicks
Kevin, Check RFC15 on the bottom of the RF Board. You must check it with an ohmmeter - even if it is open you will find 5 volts on both sides of it. Should you find it open and do not have an immediate replacement, short across it, replace the bottom cover and re-run CAL PLL - then check again for the clicks. 73, Don W3FPR Kevin Shaw wrote: My K2 has the PLL Click problem when I turn the VFO. I've tried running CAL PLL with the covers on, but no luck. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] KPA100 option almost done...
FB on your progress. I built mine a few months ago and really enjoy operating the rig. I suspect the power variation you cite is merely thermodynamics. Did you happen to touch the finals key down? The VSWR sensor likely needs tweaking per the manual instructions - mine recognizes a match pretty accurately. My built-in speaker sounds dreadful as well ! I wonder if its the impact of the metal shield ? It is especially sour sounding on CW, SSB is not quite as bad. If you do remove the shield, see how the speaker sounds. I figure the shield is to keep it from becoming a receiver at 100 watts, and thumping on CW? Proceed with care and enjoy the extra 8 dB gain in output power. 73, curt --- Steve Kallal [EMAIL PROTECTED] wrote: Well after about a month, I almost have my KPA100 option finished for the K2. I didn't accurately time the hours, but I think it is in the 25 hour region. This is the first serious kit I've built in years and the most serious ever. I had only one mistake to correct. U7, the dual op amp, was reversed. Once that got replaced, the amp came to life. I have a couple of issues left, minor ones. 1. The power does seem to vary a little bit on key down, nothing major, but a few percent before the power level settles. The TUNE function indicates 1.5:1 SWR into a dummy load. Perhaps I need to go back and retweak the SWR setting. 2. The speaker sounds like the cone is bad. I ordered a bunch of parts from Elecraft, but the speaker slipped my mind. I will need to remove the shield if the speaker gets replaced. Does the adhesive comes loose easily? Thanks for all help from this reflector! 73, Steve N6VL ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com Looking for a deal? Find great prices on flights and hotels with Yahoo! FareChase. http://farechase.yahoo.com/ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] PLL Clicks
Don, Thanks for the reply. Unfortunately it reads 8.5 ohms. I'll have to look elsewhere. Kevin N8IQ -Original Message- From: Don Wilhelm [mailto:[EMAIL PROTECTED] Sent: Thursday, August 16, 2007 4:13 PM To: Kevin Shaw Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] PLL Clicks Kevin, Check RFC15 on the bottom of the RF Board. You must check it with an ohmmeter - even if it is open you will find 5 volts on both sides of it. Should you find it open and do not have an immediate replacement, short across it, replace the bottom cover and re-run CAL PLL - then check again for the clicks. 73, Don W3FPR Kevin Shaw wrote: My K2 has the PLL Click problem when I turn the VFO. I've tried running CAL PLL with the covers on, but no luck. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] PLL Clicks
I attached an antenna and I do hear clicks when I turn the VFO in both directions while on 40 meters. Probably due to the strong SW stations. I sold the radio last week and I had to take it back and refund the gentleman's money because of the clicks. Is this something that is inherent in the K2 design and affects all radios to some degree? Thanks, Kevin N8IQ -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Kevin Shaw Sent: Thursday, August 16, 2007 10:10 PM To: [EMAIL PROTECTED] Cc: elecraft@mailman.qth.net Subject: RE: [Elecraft] PLL Clicks Don, Thanks for the reply. Unfortunately it reads 8.5 ohms. I'll have to look elsewhere. Kevin N8IQ -Original Message- From: Don Wilhelm [mailto:[EMAIL PROTECTED] Sent: Thursday, August 16, 2007 4:13 PM To: Kevin Shaw Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] PLL Clicks Kevin, Check RFC15 on the bottom of the RF Board. You must check it with an ohmmeter - even if it is open you will find 5 volts on both sides of it. Should you find it open and do not have an immediate replacement, short across it, replace the bottom cover and re-run CAL PLL - then check again for the clicks. 73, Don W3FPR Kevin Shaw wrote: My K2 has the PLL Click problem when I turn the VFO. I've tried running CAL PLL with the covers on, but no luck. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] PLL Clicks
About a week ago folks warned me about clicks (they said thumps) being a part of life with the K2 especially during higher periods of band activity. I am glad they told me. I am still going to order a K2 for the many other benefits despite this, apparently, known issue. It sounds like your symptoms are exactly this issue. Kevin Shaw wrote: I attached an antenna and I do hear clicks when I turn the VFO in both directions while on 40 meters. Probably due to the strong SW stations. I sold the radio last week and I had to take it back and refund the gentleman's money because of the clicks. Is this something that is inherent in the K2 design and affects all radios to some degree? Thanks, Kevin N8IQ -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Kevin Shaw Sent: Thursday, August 16, 2007 10:10 PM To: [EMAIL PROTECTED] Cc: elecraft@mailman.qth.net Subject: RE: [Elecraft] PLL Clicks Don, Thanks for the reply. Unfortunately it reads 8.5 ohms. I'll have to look elsewhere. Kevin N8IQ -Original Message- From: Don Wilhelm [mailto:[EMAIL PROTECTED] Sent: Thursday, August 16, 2007 4:13 PM To: Kevin Shaw Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] PLL Clicks Kevin, Check RFC15 on the bottom of the RF Board. You must check it with an ohmmeter - even if it is open you will find 5 volts on both sides of it. Should you find it open and do not have an immediate replacement, short across it, replace the bottom cover and re-run CAL PLL - then check again for the clicks. 73, Don W3FPR Kevin Shaw wrote: My K2 has the PLL Click problem when I turn the VFO. I've tried running CAL PLL with the covers on, but no luck. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] PLL Clicks
Kevin, Are the clicks only on 40 meters, or can they be heard on other bands as well? You might want to pass along the serial number too - there have been a couple upgrades in the PLL area, and if your K2 is below SN 3000, it may be beneficial to simply add the upgrades. 73, Don W3FPR Kevin Shaw wrote: I attached an antenna and I do hear clicks when I turn the VFO in both directions while on 40 meters. Probably due to the strong SW stations. I sold the radio last week and I had to take it back and refund the gentleman's money because of the clicks. Is this something that is inherent in the K2 design and affects all radios to some degree? Thanks, ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: K2 SSB problem
Hi Folks, K2 #767 has had the KSB2 module installed for several years - tested, but hardly used since installation. Testing today revealed that power output drops from 10w to 2w pep after a few words. Checked voltage readings on the SSB board - all OK except AUX BUS remained at 5.6v during transmit, rather than falling to 2.4v as per the manual. After some head-scratching, I changed the display from RF to ALC - maybe the output was being reduced? However, as long as the display is on ALC the power output is 10w PEP (Tektronix 2213 60mHz scope across 50 ohm dummy load) - AUX BUS drops to 2.4v on transmit. Changing the display back to RF yields 2w output - both conditions are repeatable. CW operation is not affected - steady 10w on the scope whether the display is RF or ALC. So far, I haven't figured the link between toggling the display between RF and ALC, and power output. Before I get out of my depth, has anyone else come across this problem? 73, Ken ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
