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Total 167 documents matching your query.

21. [AMPS] What materials to use in a RF field ??? (score: 1)
Author: n8de@thepoint.net (Don Havlicek)
Date: Mon, 28 Jan 2002 22:15:07 -0500
Art, You might look into using Delrin [high heat can be a problem] or UHMW [my choice for your application], both of which have excellent RF and DC/AC properties. You should be able to find both in a
/archives//html/Amps/2002-01/msg00245.html (9,504 bytes)

22. [AMPS] RE: found connectors but now : cable ? (score: 1)
Author: n8de@thepoint.net (Don Havlicek)
Date: Tue, 29 Jan 2002 21:15:41 -0500
In checking through the 'junque' that was in the estate I purchased years ago .. there are THREE PAIRS of Millen HV connectors, M/F. Contact me if you're interested in these MINT, never used, items.
/archives//html/Amps/2002-01/msg00293.html (8,678 bytes)

23. [AMPS] Shunt regulated high voltage psu (score: 1)
Author: n8de@thepoint.net (Don Havlicek)
Date: Wed, 30 Jan 2002 15:51:53 -0500
OR 10 db gain from a discone antenna! Don N8DE -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-
/archives//html/Amps/2002-01/msg00335.html (10,292 bytes)

24. [AMPS] ACOM 1000 (score: 1)
Author: n8de@thepoint.net (Don Havlicek)
Date: Mon, 17 Dec 2001 22:15:12 -0500
This website may answer your questions: http://www.hfpower.com/ACOM1000.htm -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@co
/archives//html/Amps/2001-12/msg00314.html (6,617 bytes)

25. [AMPS] Vacuum reed relays (score: 1)
Author: n8de@thepoint.net (Don Havlicek)
Date: Fri, 28 Dec 2001 18:02:42 -0500
Gentlemen: Have these relays on hand: CLAREED, 1-660-9019, CRZ-1145 C.P.Clare & Co., Chicago, ILL Dual coil vacuum reed relay - .5" diameter [mounting at one end is square to prevent movement] 2.25"
/archives//html/Amps/2001-12/msg00506.html (6,784 bytes)

26. [AMPS] Johnson Capacitors (score: 1)
Author: n8de@thepoint.net (Don Havlicek)
Date: Fri, 30 Nov 2001 20:10:26 -0500
As I am 'cleaning out the garage' to 'get rid of the junque', I will be listing LOTS of items for sale. I'm offering these to the reflector group before putting them on ebay: For Sale: THREE Johnson
/archives//html/Amps/2001-11/msg00000.html (6,935 bytes)

27. [AMPS] Non-Inductive Carbon Resistors (score: 1)
Author: n8de@thepoint.net (Don Havlicek)
Date: Tue, 06 Nov 2001 21:36:38 -0500
A thought: What if a large, carbon resistor of appropriate wattage was completely enclosed in a cylindrical, metal cover that was connected to only one end of the resistor? [Something like a quarter-
/archives//html/Amps/2001-11/msg00107.html (7,491 bytes)

28. [AMPS] 8873 socket (score: 1)
Author: n8de@thepoint.net (Don Havlicek)
Date: Wed, 07 Nov 2001 22:27:43 -0500
I'm repairing my Heathkit SB-230 amplifier. In moving it, the tube socket was damaged, necessitating replacement. Any ideas on finding one? Eleven-pin ... one large .. ten small .. Thanks Don N8DE --
/archives//html/Amps/2001-11/msg00137.html (6,541 bytes)

29. [AMPS] emtron (score: 1)
Author: n8de@thepoint.net (Don Havlicek)
Date: Thu, 15 Nov 2001 17:17:43 -0500
This site has an interesting amp: http://www.emtron.com.au/DX3.html 3000 watts continuous output .... hmmmmm ... Don N8DE -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contestin
/archives//html/Amps/2001-11/msg00269.html (7,127 bytes)

30. Re: [Amps] Heath SB-230 conversion? (score: 1)
Author: Don Havlicek <n8de@thepoint.net>
Date: Wed, 17 Sep 2003 10:44:50 -0500
Eric, In my opinion, NO .. as the tube socket is placed in close proximity to the heat sink for obvious reasons. Not quite sure how you would propose to utilize the heat sink with a tube requiring ai
/archives//html/Amps/2003-09/msg00157.html (7,793 bytes)

31. [Amps] Amps Needing Repair (score: 1)
Author: Don Havlicek <n8de@thepoint.net>
Date: Fri, 26 Dec 2003 10:58:38 -0500
Have the following needing repair/update/ramping: THREE - Dentron Clipperton-L amps ONE - Dentron DTR-2000L amp ONE - Ameritron Al-84 amp ONE - Dentron MLA-1200 Would prefer to 'hire' someone who liv
/archives//html/Amps/2003-12/msg00392.html (7,053 bytes)

32. Re: [Amps] Anyone know heater volts and current for a 203A? (score: 1)
Author: Don Havlicek <n8de@thepoint.net>
Date: Sat, 27 Dec 2003 15:09:14 -0500
From: http://www.tubeworld.com/western.html VT-1=203A Triode (VT-1=2.5V @ 1.1A Filament, Vplate=60V, Iplate=2ma, Mu=6, Rplate=20Kohms) Good luck Don N8DE tongaloa wrote: Have some 203A's. Near as I c
/archives//html/Amps/2003-12/msg00417.html (8,263 bytes)

33. Re: [Amps] DUMMY LOADS (score: 1)
Author: Don Havlicek <n8de@thepoint.net>
Date: Sun, 28 Dec 2003 11:41:58 -0500
Your dummy load will work fine as long as you DO NOT try to tune up with key down in CW position. Use a string of dits at about 60 wpm to tune .. that's 50% duty cycle and your dummy load should do q
/archives//html/Amps/2003-12/msg00423.html (7,614 bytes)

34. [Amps] 6 meter amp (score: 1)
Author: Don Havlicek <n8de@thepoint.net>
Date: Fri, 23 Jan 2004 09:55:17 -0500
Would like information from anyone on the reflector who has successfully modified [or used without modification] a 'CB-type' amplifier on 6 meters. Specifically interested in what was done for higher
/archives//html/Amps/2004-01/msg00238.html (6,922 bytes)

35. Re: [Amps] filament supply options (score: 1)
Author: Don Havlicek <n8de@thepoint.net>
Date: Mon, 26 Apr 2004 06:04:22 -0500
I believe you meant to say: "Hot-R is 8.3 times as much as Cold-R" If the Cold-R is ONE TIME LESS than the Hot-R, the Cold-R is ZERO .... I also 'cringe' when I hear advertising using "5 times more"
/archives//html/Amps/2004-04/msg00210.html (10,311 bytes)

36. Re: [Amps] Alpha 76A Multimeter (score: 1)
Author: Don Havlicek <n8de@thepoint.net>
Date: Tue, 03 Aug 2004 21:24:23 -0500
Don Sounds like static electricity on the plastic meter face cover. Use a soft, damp cloth to remove it. Don N8DE Don Nesbitt wrote: For a long time my "multimeter" has been very "sluggish" and sort
/archives//html/Amps/2004-08/msg00027.html (8,599 bytes)

37. Re: [Amps] Need Diagnostic help (score: 1)
Author: Don Havlicek <n8de@thepoint.net>
Date: Tue, 17 Aug 2004 08:27:03 -0500
Tom, Have you measured the 240v lines at both your shack and your friend's? My best guess is that your 240v line is either ultra-high in voltage, or the ground is NOT connected correctly and the two
/archives//html/Amps/2004-08/msg00173.html (12,000 bytes)

38. Re: [Amps] Amplifier Surplus Parts & Tubes (score: 1)
Author: Don Havlicek <n8de@thepoint.net>
Date: Wed, 18 Aug 2004 11:35:13 -0500
Hal, You left the letter 's' off the URL: http://www.economyelectronics.com Don N8DE Harold B. Mandel wrote: Gentlemen, The following source, << http://www.economyelectronic.com >> has a huge supply
/archives//html/Amps/2004-08/msg00196.html (8,699 bytes)

39. Re: [Amps] 5 kw amps -- why? (score: 1)
Author: Don Havlicek <n8de@thepoint.net>
Date: Tue, 19 Oct 2004 12:19:49 -0500
Key down at power limit, using RTTY, etc..... with no amp heating problems? Don N8DE Rob Atkinson, K5UJ wrote: After reading a review in Eham today for the Emtron DX4 (2 4cx2500s) by an American ham,
/archives//html/Amps/2004-10/msg00258.html (8,377 bytes)

40. Re: [Amps] Blowing off steam (score: 1)
Author: Don Havlicek <n8de@thepoint.net>
Date: Wed, 20 Oct 2004 11:04:37 -0500
Will, Don't forget that there are 'shills' out there ... and 'illegal bidders'. In both cases .. they drive up the prices for the seller. The 'shills' are 'hired' by the sellers ... some are just 'fr
/archives//html/Amps/2004-10/msg00306.html (9,318 bytes)

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