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21. [Amps] AC Plugs (score: 1)
Author: "Edwin Karl" <edk0kl@centurytel.net>
Date: Sun, 8 Jul 2007 21:45:53 -0500
Hey let's not overthink this AC plug thing. When my amplifier is wired for 240 (presently), there are 2 wires carrying AC from the outlet to the amplifier. Be it Red/White, Red/Black Black/White, and
/archives//html/Amps/2007-07/msg00102.html (6,636 bytes)

22. [Amps] Gassy Tubes (score: 1)
Author: "Edwin Karl" <edk0kl@centurytel.net>
Date: Fri, 27 Jul 2007 08:20:53 -0500
As I recall, Sylvania and National Union both brought the beam forming electrode out through the envelope. They were available at Cortland Street 5 for one dollar. The differences between an 807 (the
/archives//html/Amps/2007-07/msg00458.html (6,811 bytes)

23. [Amps] Multiple Model Numbers (score: 1)
Author: "Edwin Karl" <edk0kl@centurytel.net>
Date: Sat, 28 Jul 2007 08:20:48 -0500
Like many manufacturers, MFJ undoubtedly wants to compete in all areas. So models for every one using the more popular tubes in the amps. Now, if you examine the design closely, the output tube modul
/archives//html/Amps/2007-07/msg00482.html (23,387 bytes)

24. [Amps] LK-500ZA hot (score: 1)
Author: "Edwin Karl" <edk0kl@centurytel.net>
Date: Mon, 13 Aug 2007 15:43:18 -0500
Dave I own 2 LK-500 amps, one a "B" and the other a "C". The "B" came without a high/low switch for the fan. Yes it runs quiet in that position but does not cool the tubes when you are operating for
/archives//html/Amps/2007-08/msg00053.html (8,559 bytes)

25. Re: [Amps] Amps Digest, Vol 56, Issue 20 (score: 1)
Author: "Edwin Karl" <edk0kl@centurytel.net>
Date: Wed, 15 Aug 2007 11:45:03 -0500
Re: LK-500 AMP- Actually Omega Electronics has a better parasite suppressor.Or just make sure you have not cooked the resistor in your suppressor. It's supposed to dissipate the parasite and load the
/archives//html/Amps/2007-08/msg00090.html (22,189 bytes)

26. Re: [Amps] Amps Digest, Vol 56, Issue 38 (score: 1)
Author: "Edwin Karl" <edk0kl@centurytel.net>
Date: Mon, 27 Aug 2007 10:50:02 -0500
RE; SB-200 circuit breaker. I have had s few of these amps in the past. All seemed to suffer from heat problems, no doubt to the poor (in my opinion) ventelation. The muffin fan is a good start. Howe
/archives//html/Amps/2007-08/msg00210.html (32,178 bytes)

27. Re: [Amps] Amps Digest, Vol 57, Issue 12 (score: 1)
Author: "Edwin Karl" <edk0kl@centurytel.net>
Date: Fri, 7 Sep 2007 11:20:23 -0500
TL-922 Diode replacement Had the same problem with my TL-922A There is a 50 amp zener diode available from Mouser that should work, have to do a bracket of some sort. Or you could wire a number of si
/archives//html/Amps/2007-09/msg00077.html (31,001 bytes)

28. Re: [Amps] Amps Digest, Vol 57, Issue 52 (score: 1)
Author: "Edwin Karl" <edk0kl@centurytel.net>
Date: Wed, 26 Sep 2007 20:27:14 -0500
Re: Amplifier Linearity Does anyone besides me still use a 'scope in trapezoid pattern looking at input vs. output linearity? Seems like we're getting into "flat topping" tubes, etc just to get the m
/archives//html/Amps/2007-09/msg00349.html (33,272 bytes)

29. [Amps] Re RF Parts Tubes (score: 1)
Author: "Edwin Karl" <edk0kl@centurytel.net>
Date: Mon, 12 Nov 2007 19:46:13 -0600
I have used several RF Parts 3-500Z tubes with good results. I found tha Amprex tubes deliver slightly less (100 w or so) output for a given input power and drive. Currently I have 2- LK-500Z amplifi
/archives//html/Amps/2007-11/msg00184.html (6,419 bytes)

30. [Amps] Re LK-450 Keying (score: 1)
Author: "Edwin Karl" <edk0kl@centurytel.net>
Date: Sat, 8 Mar 2008 16:07:21 -0600
Can't say for sure, I have LK-500 ZB and ZC, both key the relay directly. You can tell with a voltmeter on the keying line, if it's more than 5 volts or uses more than a few ma. you can bet your keyi
/archives//html/Amps/2008-03/msg00081.html (6,474 bytes)

31. [Amps] Various (score: 1)
Author: "Edwin Karl" <edk0kl@centurytel.net>
Date: Fri, 18 Apr 2008 10:40:35 -0500
Dielectric in Raymond, ME might be a source for the 3 1/8" adaptor. Out of the broadcast business for 4 1/2 years, not sure if that's the current name or became a part of Andrew. I believe a rule of
/archives//html/Amps/2008-04/msg00238.html (6,824 bytes)

32. Re: [Amps] Contents of Amps digest..." LK-500 interface (score: 1)
Author: "Edwin Karl" <edk0kl@centurytel.net>
Date: Fri, 10 Oct 2008 19:50:33 -0500
I have 2- LK 500s and have built a small relay in an enclosure that will key the amplifier. Not a big deal, relay voltage available at the accessory socket. Wire in series with the transmit key line.
/archives//html/Amps/2008-10/msg00048.html (6,868 bytes)

33. [Amps] Whatever happened to (score: 1)
Author: "Edwin Karl" <edk0kl@centurytel.net>
Date: Sun, 9 Nov 2008 11:57:07 -0600
Bill, the fellow that ran Omega Electronics passed away months ago. Anyone know what happened to the company, parts, service, etc. He did great work and will be missed. ed K0KL ______________________
/archives//html/Amps/2008-11/msg00074.html (6,363 bytes)

34. [Amps] LK-500 Blows Caps (score: 1)
Author: "Edwin Karl" <edk0kl@centurytel.net>
Date: Tue, 2 Dec 2008 08:04:20 -0600
When I rebuilt my LK-500B, I added step start, mostly due to using much greater value caps, I already was concerned about the "boing" when it turned on, doubling the C worried me. Simple series 10 wa
/archives//html/Amps/2008-12/msg00032.html (7,000 bytes)

35. [Amps] L-4B Issue (score: 1)
Author: "Edwin Karl" <edk0kl@centurytel.net>
Date: Sun, 21 Dec 2008 14:40:51 -0600
I am rebuilding the power supply on a pal's L-4B and am stumped at a problem that has developed. Original symptom was no high voltage. Looked like the fuse resistor had opened in the supply. So I fel
/archives//html/Amps/2008-12/msg00282.html (7,909 bytes)

36. Re: [Amps] L-4B Issue (score: 1)
Author: "Edwin Karl" <edk0kl@centurytel.net>
Date: Thu, 25 Dec 2008 22:47:55 -0600
Mel Thanks for the input. I was energized to look into the amplifier instead of focusing on the power supply. The problem turned out to be R8 a 1 ohm 10 watt resistor from B- to ground. The grid mete
/archives//html/Amps/2008-12/msg00337.html (13,843 bytes)

37. [Amps] 1625 (score: 1)
Author: "Edwin Karl" <edk0kl@centurytel.net>
Date: Wed, 11 Feb 2009 15:05:47 -0600
As I recall, having built one of those amps way in the before time, Sylvania and National Untion brought the beam forming electrode out to the base. Apparently others manufactured the tubes with inte
/archives//html/Amps/2009-02/msg00335.html (6,405 bytes)

38. [Amps] Unsubscription et all (score: 1)
Author: "Edwin Karl" <edk0kl@centurytel.net>
Date: Mon, 24 Aug 2009 16:29:22 -0500
Gentlemen I think we continue to spend more time with innocuous B.S.. about personalities and who said what to whom than actual discussions about amplifiers ... Having said that, I fail to understand
/archives//html/Amps/2009-08/msg00462.html (8,288 bytes)

39. [Amps] LK-500 Metering (score: 1)
Author: "Edwin Karl" <edk0kl@centurytel.net>
Date: Wed, 2 Sep 2009 09:30:02 -0500
Look in the amplifier for a board that is in the front left corner of the cabinet. You will find 2- 5 watt resistors. One is for the Grid Current metering, the second is for the plate current, each a
/archives//html/Amps/2009-09/msg00016.html (7,378 bytes)

40. Re: [Amps] Amps Digest, Vol 82, Issue 13 (score: 1)
Author: "Edwin Karl" <edk0kl@centurytel.net>
Date: Mon, 5 Oct 2009 15:20:19 -0500
Having owned two of the three amps you mention, I vote for the AMP Supply. Though not "top of the line" the AMP Supply and Heath SB-220 are similar, use relatively inexpensive 3-500 finals, virtual i
/archives//html/Amps/2009-10/msg00102.html (7,686 bytes)

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