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21. [Amps] re: EBS at soft or quiet moments (score: 1): Author: wb8jkr at juno.com (wb8jkr@juno.com); Date: Sat Aug 2 17:17:53 2003; There is a way to clean up EBS circuits, I did it a number of years ago and have never once had comment that the improvement isn't short of spectacular. I have a 4CX250B 2 meter amp I built a number; /archives//html/Amps/2002-09/msg00293.html (11,942 bytes)
22. [Amps] re: EBS at soft or quiet moments (score: 1): Author: wb8jkr at juno.com (wb8jkr@juno.com); Date: Sun Aug 3 22:20:50 2003; The EBS circuit goes in the cathode/grid path, I.E. cathode to ground (grid). It is installed from the anode of the bias zener to ground (grid) and the B- goes to the junction of the bias zener catho; /archives//html/Amps/2002-09/msg00309.html (10,361 bytes)
23. [Amps] re: EBS at soft or quiet moments (score: 1): Author: wb8jkr at juno.com (wb8jkr@juno.com); Date: Mon Aug 4 22:59:34 2003; It is a grid driven amp. Isn't bias between the cathode and grid? Works the same way, just has grid current flowing through it rather than cathode and grid current. Mark WB8JKR On Mon, 4 Aug 2003 07:; /archives//html/Amps/2002-09/msg00317.html (9,099 bytes)
24. [Amps] Filter (score: 1): Author: wb8jkr@juno.com (wb8jkr@juno.com); Date: Mon, 12 Aug 2002 19:54:40 -0400; I think bifilar winding also allows the 60 Hz current to cancel in the core. Mark WB8JKR On Mon, 12 Aug 2002 15:22:51 -0700 Dennis Watkins <andromeda@seanet.com> writes: _____________________________; /archives//html/Amps/2002-08/msg00122.html (8,653 bytes)
25. [Amps] 572B Tube Failure ? (score: 1): Author: wb8jkr@juno.com (wb8jkr@juno.com); Date: Sun, 7 Jul 2002 13:48:03 -0400; Sounds like the filament/cathode support. Mark WB8JKR ________________________________________________________________ GET INTERNET ACCESS FROM JUNO! Juno offers FREE or PREMIUM Internet access for l; /archives//html/Amps/2002-07/msg00104.html (10,030 bytes)
26. [Amps] CTI follow up (score: 1): Author: wb8jkr@juno.com (wb8jkr@juno.com); Date: Tue, 25 Jun 2002 05:12:02 -0400; Seems to me the first guy to start really barking is usually the one losing the argument, this guy's way TOO defensive. Mark WB8JKR On Mon, 24 Jun 2002 20:44:35 -0700 skipp isaham <nospam4me@juno.com; /archives//html/Amps/2002-06/msg00205.html (11,174 bytes)
27. [Amps] Defibrillator/discharge caps for smoothing (score: 1): Author: wb8jkr@juno.com (wb8jkr@juno.com); Date: Wed, 8 May 2002 19:23:52 -0400; Hi Conrad, I'm using two 30 uf 5 KV defib caps in my 3800 v supply and they have been working fine for 17 years now. 73, Mark WB8JKR On Wed, 8 May 2002 22:15:25 +0100 "Conrad G0RUZ" <g0ruz@btinternet; /archives//html/Amps/2002-05/msg00100.html (7,709 bytes)
28. [Amps] Defibrillator/discharge caps for smoothing (score: 1): Author: wb8jkr@juno.com (wb8jkr@juno.com); Date: Wed, 8 May 2002 20:25:53 -0400; They are in parallel in a FWB circuit powering an 8877, the supply delivers 3300 volts at 1 amp. I use two series connected 25 ohm 50 watt glitch resistors in the output line to the amp, but have nev; /archives//html/Amps/2002-05/msg00101.html (7,732 bytes)
29. [Amps] Mica capacitors - friend or foe? (score: 1): Author: wb8jkr@juno.com (wb8jkr@juno.com); Date: Fri, 24 May 2002 20:10:43 -0400; Doesn't one also have to consider the reactance of the cap at a specific frequency and the result change in possible breakdown E of the cap? A cap with 50 ohms of reactance and 10 amps flowing throug; /archives//html/Amps/2002-05/msg00422.html (9,716 bytes)
30. [Amps] Terminology Question (score: 1): Author: wb8jkr@juno.com (wb8jkr@juno.com); Date: Thu, 21 Mar 2002 05:06:11 -0500; The B always stood for "B" battery or the higher voltage supply, and the "C" was the C battery was the bias source. I least that's what I remember it being, could be wrong. The "A" battery? dunno, ma; /archives//html/Amps/2002-03/msg00456.html (8,886 bytes)
31. [Amps] SB-220 metering (score: 1): Author: wb8jkr@juno.com (wb8jkr@juno.com); Date: Fri, 22 Mar 2002 17:29:49 -0500; Since the meter movement uses a common ground for all three functions, my guess would be the meter switch. 73, Mark WB8JKR On Fri, 22 Mar 2002 16:56:04 -0500 Pete Smith <n4zr@contesting.com> writes:; /archives//html/Amps/2002-03/msg00511.html (7,664 bytes)
32. [Amps] HV Voltmeters (score: 1): Author: wb8jkr@juno.com (wb8jkr@juno.com); Date: Fri, 22 Mar 2002 21:00:17 -0500; Your HV divider is only allowing about .0009 amp to flow so it won't drive the meter. A 100 ma. meter is WAY to high of a value to use as a HV meter. I would use a 1 ma. meter at the most. If you wer; /archives//html/Amps/2002-03/msg00523.html (11,039 bytes)
33. [Amps] Bird=ae 43 Manual (score: 1): Author: wb8jkr@juno.com (wb8jkr@juno.com); Date: Tue, 26 Mar 2002 17:15:11 -0500; Page 4-1 section 2 of the Bird 43 manual: "Where appreciable power is reflected, as with an antenna, it is necessary to subtract reflected from forward power to get load power" Mark WB8JKR __________; /archives//html/Amps/2002-03/msg00605.html (8,770 bytes)
34. [AMPS] Filamant CT (score: 1): Author: wb8jkr@juno.com (wb8jkr@juno.com); Date: Sun, 3 Feb 2002 11:51:46 -0500; You'd be asking for hum. Rather than using a couple resistors, you could simply take another small 6.3 v transformer with a CT on the secondary and connect it across your filament transformer and jus; /archives//html/Amps/2002-02/msg00037.html (8,030 bytes)
35. [AMPS] Input matching experiment (score: 1): Author: wb8jkr@juno.com (wb8jkr@juno.com); Date: Fri, 18 Jan 2002 20:19:33 -0500; It would seem to me that using a swamping resistor at the cathode of a cathode driven amp would get rid of excessive drive power and also limit the maximum swing in the load value the cathode shows t; /archives//html/Amps/2002-01/msg00141.html (10,491 bytes)
36. [AMPS] Inductors (score: 1): Author: wb8jkr@juno.com (wb8jkr@juno.com); Date: Tue, 18 Dec 2001 05:11:26 -0500; I have a question, unless there is a "slit" cut down one side of this copper tube wouldn't it (the copper tube) also act as a shorted turn? Mark WB8JKR _______________________________________________; /archives//html/Amps/2001-12/msg00320.html (8,880 bytes)
37. [AMPS] HV Pole Pigs ++ (OT) (score: 1): Author: wb8jkr@juno.com (wb8jkr@juno.com); Date: Thu, 20 Dec 2001 19:28:06 -0500; That's completely goofy. The neutral wire is the support wire that the low side cables wrapped around. The pole grounds are for lightening, not 60 Hz return. In the U.S. the top three wires are each; /archives//html/Amps/2001-12/msg00413.html (10,457 bytes)
38. [AMPS] Looking for..... (score: 1): Author: wb8jkr@juno.com (wb8jkr@juno.com); Date: Tue, 25 Dec 2001 22:28:06 -0500; I know its a long shot, but....... I'm looking for a trashed Drake L4B RF deck. I don't really care what shape its in electrically as all I need are the knobs and the cabinet halves. Thanks, Mark WB8; /archives//html/Amps/2001-12/msg00481.html (6,829 bytes)
39. [AMPS] amplifier for eme (score: 1): Author: wb8jkr@juno.com (wb8jkr@juno.com); Date: Sat, 24 Nov 2001 12:38:48 -0500; My 8877 (homebrew) will run up to 3100 volts keydown 1 amp Plate current ~ 40 ma. Grid current ~ 70 watts drive 1900 watts output 1500 watts output occurs at .8 amp plate current 3200 volts and about; /archives//html/Amps/2001-11/msg00416.html (7,910 bytes)
40. [AMPS] transformer oil (score: 1): Author: wb8jkr@juno.com (wb8jkr@juno.com); Date: Mon, 1 Oct 2001 05:16:04 -0400; For what its worth, I did some research in this area about 10 years ago while building a large oil filled capacitor for a Tesla coil project. I found out that Texaco repackages "transformer oil" and; /archives//html/Amps/2001-10/msg00000.html (7,788 bytes)

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