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Total 12 documents matching your query.

1. Re: [Amps] Checking for IMD (score: 1)
Author: Martin AA6E <aa6e@ewing.homedns.org>
Date: Fri, 11 Aug 2006 10:43:04 -0400
Bill, I've wondered about this, too. The lab method is to use a high-priced spectrum analyzer, but couldn't you do something useful with a soundcard based spectrum analyzer? You would need to have a
/archives//html/Amps/2006-08/msg00396.html (7,729 bytes)

2. Re: [Amps] Checking for IMD (score: 1)
Author: Martin AA6E <aa6e@ewing.homedns.org>
Date: Fri, 11 Aug 2006 12:27:27 -0400
Why not directly detect the output RF with a linear rectifier / filter? Also, why not use closely spaced tones (20-30 Hz) to make things easier on the sound card? This is basically what the PSKmeter
/archives//html/Amps/2006-08/msg00402.html (10,892 bytes)

3. Re: [Amps] Checking for IMD (score: 1)
Author: Martin AA6E <aa6e@ewing.homedns.org>
Date: Fri, 11 Aug 2006 12:32:17 -0400
Oops, the PSKmeter does NOT use the sound card -- it has its own simple A/D converter which connects to a serial port. --Martin _______________________________________________ Amps mailing list Amps@
/archives//html/Amps/2006-08/msg00403.html (8,377 bytes)

4. Re: [Amps] Checking for IMD (score: 1)
Author: Martin AA6E <aa6e@ewing.homedns.org>
Date: Sun, 13 Aug 2006 23:02:58 -0400
Thinking a little more about the dynamic IMD with syllabic fluctuations, etc., I wonder if a narrow spaced two-tone test (10 to 30 Hz, ala PSK31) would be a useful proxy. The low-frequency beat would
/archives//html/Amps/2006-08/msg00464.html (9,781 bytes)

5. Re: [Amps] Anodizing aluminum, painting etc. (score: 1)
Author: Martin AA6E <aa6e@ewing.homedns.org>
Date: Fri, 18 Aug 2006 08:55:56 -0400
This is an interesting thread. The one point that has not been mentioned is that the visible color (black or bare aluminum or whatever) has little to do with heat radiation. Unless you're talking abo
/archives//html/Amps/2006-08/msg00541.html (10,428 bytes)

6. Re: [Amps] HV transformers I want to series primary and parallelsecondary (score: 1)
Author: Martin AA6E <aa6e@ewing.homedns.org>
Date: Fri, 18 Aug 2006 17:45:33 -0400
I want to say, 30 or 40 volts! ;-) More seriously, it depends on the source resistance of the two supplies. If the supplies are very "stiff", the higher voltage one will supply all the current. 73 Ma
/archives//html/Amps/2006-08/msg00548.html (7,641 bytes)

7. Re: [Amps] HV transformers I want to seriesprimary andparallelsecondary (score: 1)
Author: Martin AA6E <aa6e@ewing.homedns.org>
Date: Sat, 19 Aug 2006 10:29:00 -0400
Sure, but you ought to try Shakespeare first! Martin _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2006-08/msg00561.html (8,471 bytes)

8. [Amps] State of the Amp (score: 1)
Author: Martin AA6E <aa6e@ewing.homedns.org>
Date: Mon, 21 Aug 2006 19:40:55 -0400
Hello Amp people, After nearly 50 years of hamming at the 100 W level, I have lately got interested in making bigger zaps, dimming house lights, offending the neighbors, etc. So I've been surveying t
/archives//html/Amps/2006-08/msg00579.html (7,863 bytes)

9. Re: [Amps] State of the Amp (score: 1)
Author: Martin AA6E <aa6e@ewing.homedns.org>
Date: Mon, 21 Aug 2006 20:32:55 -0400
Eddy, Home brew is certainly an option, but it's not the quickest way to get something on the air. It's not cheap if you value your time, but it's great if you enjoy the process. I'm tempted. Thanks
/archives//html/Amps/2006-08/msg00581.html (8,257 bytes)

10. Re: [Amps] Bizarre SB-230 meter failure (score: 1)
Author: Martin AA6E <aa6e@ewing.homedns.org>
Date: Mon, 28 Aug 2006 21:45:56 -0400
John, If you're lucky, it might just be some magnetic dust that found its way onto the magnet, and the magnet might be OK underneath. I've never heard of magnets disintegrating. Nice photo! 73 Martin
/archives//html/Amps/2006-08/msg00747.html (8,556 bytes)

11. Re: [Amps] Parasitics & Filament Sag (score: 1)
Author: Martin AA6E <aa6e@ewing.homedns.org>
Date: Mon, 04 Sep 2006 13:40:40 -0400
Karl-Arne, Radio amateurs come in all levels of technical knowledge. The rule is that no matter how much you know, there's somebody who knows more than you do about any subject! Thanks for presenting
/archives//html/Amps/2006-09/msg00076.html (15,218 bytes)

12. Re: [Amps] History of AMPS (score: 1)
Author: Martin AA6E <aa6e@ewing.homedns.org>
Date: Tue, 05 Sep 2006 09:31:46 -0400
The current archives begin Jan. 1997 -- http://lists.contesting.com/pipermail/amps/ . But that can't have been the beginning. The '97 archive begins with a message about parasitic suppressors. Plus &
/archives//html/Amps/2006-09/msg00097.html (6,796 bytes)

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