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References: [ +from:watson@sierracmp.com: 29 ]

Total 29 documents matching your query.

1. [Amps] How light can you make a 500W amplifier? (score: 1)
Author: watson@sierracmp.com (George K. Watson)
Date: Tue, 15 Oct 2002 14:14:15 -0600
No, and efficiency and weight can be helped further by running at higher DC voltages using off-line buck style converters. I have run class E cw at 46Mhz using 100V off of a buck converter for 300W
/archives//html/Amps/2002-10/msg00155.html (11,846 bytes)

2. [AMPS] Chassis for HB Amps (score: 1)
Author: watson@sierracmp.com (George K. Watson)
Date: Wed, 2 Jan 2002 11:17:33 -0700
As for hole cutting, I had spent years with saber/jigsaw and file. I will never touch them again after acquiring an inexpensive 1/2" chuck drill press and a pair of metal hole cutters that mount to t
/archives//html/Amps/2002-01/msg00016.html (8,656 bytes)

3. [AMPS] Chassis for HB Amps (score: 1)
Author: watson@sierracmp.com (George K. Watson)
Date: Wed, 2 Jan 2002 17:09:05 -0700
It is that kind of cutter. I don't remember the thickness limit. As for drill press speed, they say 400rpm. Mine bottoms out at 600rpm, but seems to work. I am extremely careful and patient with it
/archives//html/Amps/2002-01/msg00026.html (7,769 bytes)

4. [AMPS] Sound card two tone generation (score: 1)
Author: watson@sierracmp.com (George K. Watson)
Date: Thu, 18 Oct 2001 13:52:50 -0600
I seem to remember a while back some discussion of two tone generation for amplifier/transmitter testing via PC sound card. Was there any discussion of available software? I am rather keen on finishi
/archives//html/Amps/2001-10/msg00377.html (7,063 bytes)

5. [AMPS] SB-1000 mods? (score: 1)
Author: watson@sierracmp.com (George K. Watson)
Date: Fri, 7 Sep 2001 21:16:35 -0600
There are HV fuses that address these issues. They are readily available surplus, though a bit pricey. The arc quench technology is the essence of KISS as they fill the fuse with sand. George K. Wat
/archives//html/Amps/2001-09/msg00117.html (8,434 bytes)

6. [AMPS] Large Doorknobs (score: 1)
Author: watson@sierracmp.com (George K. Watson)
Date: Sat, 18 Aug 2001 10:30:47 -0600
I have some extra doorknob caps that I probably will never use. They are Cera-mite 2500PF 30KV. They would make very nice DC blocking caps for a substantial amplifier. I have 11 and will be keeping 4
/archives//html/Amps/2001-08/msg00212.html (6,843 bytes)

7. [AMPS] Large Doorknobs (score: 1)
Author: watson@sierracmp.com (George K. Watson)
Date: Sat, 18 Aug 2001 18:18:58 -0600
This is a multi-part message in MIME format. --=_NextPart_000_0014_01C12812.3F694330 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Thanks for all the offers, the large
/archives//html/Amps/2001-08/msg00222.html (7,838 bytes)

8. [Amps] HV rectifier (and other parts) source (score: 1)
Author: "George K. Watson" <watson@sierracmp.com>
Date: Sat, 6 Sep 2003 09:43:41 -0600
I have been using these guys in a commercial HV project for a bit: http://www.voltagemultipliers.com/ Good service, nice set of semiconductors. They also sell direct in small quantities. George K. Wa
/archives//html/Amps/2003-09/msg00061.html (6,742 bytes)

9. [Amps] FS: SPST Vacuum relays (score: 1)
Author: "George K. Watson" <watson@sierracmp.com>
Date: Thu, 25 Sep 2003 10:28:16 -0600
12V coil, 3KV, 10A Single Pole Single Throw vacuum relays. I have 5 to spare, all in good condition, USD$15.00ea. George K. Watson _______________________________________________ Amps mailing list Am
/archives//html/Amps/2003-09/msg00189.html (6,633 bytes)

10. [Amps] Millen 90651 Grid Dip Meter FS (score: 1)
Author: "George K. Watson" <watson@sierracmp.com>
Date: Thu, 25 Sep 2003 10:34:21 -0600
I have a Millen Grid Dipper, 90651, Serial number: 7554 for sale. It is in beautiful condition, though I would definitely power it cautiously as I have not for about 5 years. It comes in a very nice
/archives//html/Amps/2003-09/msg00190.html (6,490 bytes)

11. RE: [Amps] Fw: airspaced C's (score: 1)
Author: "George K. Watson" <watson@sierracmp.com>
Date: Tue, 23 Dec 2003 14:37:27 -0700
The altitude effect is large. I live at 2500m and I have gone to almost all vacuum variables. George K. Watson K0IW And then run at 1/2 of what you get 'cause humidity, dust and altitude all contribu
/archives//html/Amps/2003-12/msg00361.html (8,606 bytes)

12. [Amps] Step Start in General (score: 1)
Author: "George K. Watson" <watson@sierracmp.com>
Date: Wed, 7 Jan 2004 08:29:27 -0700
For the first two valve supplies that I built, I used a fairly conventional step start for the HV transformer primary and filament transformer primary. The circuits were processor controlled by a jSt
/archives//html/Amps/2004-01/msg00076.html (7,850 bytes)

13. RE: [Amps] Power combiners and antennas??? (score: 1)
Author: "George K. Watson" <watson@sierracmp.com>
Date: Tue, 20 Jan 2004 07:42:50 -0700
Easiest to use a splitter/combiner. Otherwise, I believe you will have a lot of tricky cable measuring to do. George K. Watson Hello fellow amp gurus- I have a question for the experts. I have two TE
/archives//html/Amps/2004-01/msg00210.html (7,799 bytes)

14. [Amps] FS: HV Transformer (score: 1)
Author: "George Watson" <watson@sierracmp.com>
Date: Sun, 12 Jun 2005 19:14:11 -0600
I have a 2.5KV 800ma military surplus transformer available. I have never placed it in service, but checked its output unloaded at one point. I am cleaning up so would let this go for $65.00 + shippi
/archives//html/Amps/2005-06/msg00082.html (6,443 bytes)

15. [Amps] FS - AL1200 resuscitation candidate (score: 1)
Author: "George Watson" <watson@sierracmp.com>
Date: Fri, 2 Jun 2006 14:01:53 -0600
I have an Ameritron AL1200 that a friend dropped on me which needs a bit of work and can likely be put back on the air. First the positives: 1. It powers up and the HV appears to be sound. 2. The tub
/archives//html/Amps/2006-06/msg00158.html (7,550 bytes)

16. Re: [Amps] HV Turn On Delay (score: 1)
Author: "George Watson" <watson@sierracmp.com>
Date: Wed, 27 Sep 2006 09:37:32 -0600
Thankfully, it was not a Pinto. 73 de K0IW George _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2006-09/msg00325.html (7,328 bytes)

17. Re: [Amps] Icom 551 with amplifier (score: 1)
Author: George Watson <watson@sierracmp.com>
Date: Wed, 10 Feb 2010 09:29:59 -0700
I had a 551D for a long time and never heard any complaints. It looked pretty good on the SA also, I may have the plots around somewhere. I ran it barefoot, and at very reduced power into a MRF151G h
/archives//html/Amps/2010-02/msg00302.html (9,452 bytes)

18. Re: [Amps] HP 851B Spectrum Analyzer and HP 400DR VTVM for sale (Kansas City area) (score: 1)
Author: George Watson <watson@sierracmp.com>
Date: Sun, 14 Feb 2010 10:40:24 -0700
All, Is it ok to post for sale items here? It was a while back and I am getting ready to move and have a good deal of QRO applicable stuff to unload... K0IW/George ___________________________________
/archives//html/Amps/2010-02/msg00382.html (7,754 bytes)

19. Re: [Amps] HP 851B Spectrum Analyzer and HP 400DR VTVM for sale (Kansas City area) (score: 1)
Author: George Watson <watson@sierracmp.com>
Date: Sun, 14 Feb 2010 18:07:49 -0700
I don't have a list yet, I'll spend sometime tomorrow putting one together. Lots of good stuff. George _______________________________________________ Amps mailing list Amps@contesting.com http://lis
/archives//html/Amps/2010-02/msg00390.html (9,692 bytes)

20. Re: [Amps] HV Fuses (score: 1)
Author: George Watson <watson@sierracmp.com>
Date: Wed, 17 Feb 2010 07:38:05 -0700
I have several sand-filled HV fuses that I no longer need. If anyone is interested, contact me off list. George/K0IW _______________________________________________ Amps mailing list Amps@contesting.
/archives//html/Amps/2010-02/msg00481.html (11,668 bytes)

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