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Total 99 documents matching your query.

21. Re: [Amps] Henry 2003 Filter for 20002A Amp (score: 1)
Author: "Mike Krzystyniak K9MK" <k9mk@flash.net>
Date: Tue, 10 Jul 2007 09:37:15 -0500
Roger, Understood. My Henry 2002-A has the smaller filter box on the back wall. It is not a strip line but discrete coils and caps. I recall 7-9 elements and when I swept it once it was flat through
/archives//html/Amps/2007-07/msg00148.html (10,458 bytes)

22. [Amps] Dentron Clipperton L (score: 1)
Author: "Mike & Becca Krzystyniak" <k9mk@flash.net>
Date: Tue, 18 Mar 2008 11:24:08 -0500
I picked up a Clipperton L "fixer upper" that has the panel meter open circuit. Does anyone know the specifics of the meter? Full scale deflection current and resistance? Has anyone changed one befor
/archives//html/Amps/2008-03/msg00166.html (6,577 bytes)

23. [Amps] Re2: Dentron DTR 2000L Linear (score: 1)
Author: k9mk@flash.net
Date: Wed, 23 Apr 2008 19:38:14 +0000
I have had several DTR2000L's, and still own one now. They are good little desktop amps and the 8877 makes it quite attractive. On a good 220V source they make 1500w on 160-40m, a shade less than 150
/archives//html/Amps/2008-04/msg00275.html (9,858 bytes)

24. Re: [Amps] Fwd: Re: Bill Orr comment (score: 1)
Author: k9mk@flash.net
Date: Wed, 23 Jul 2008 18:01:00 +0000
I can't speak to todays class of ceramic tubes but in the 70's I built a number of 3-1000Z amps. The rule of thunb for a well designed AB amp was 2:1, output power vs. dissipation. So, yes I agree wi
/archives//html/Amps/2008-07/msg00213.html (11,290 bytes)

25. [Amps] FL2100B and 572B damage questions (score: 1)
Author: "Mike & Becca Krzystyniak" <k9mk@flash.net>
Date: Mon, 19 Jan 2009 21:45:05 -0600
I picked up a FL-2100B amp that allegedly had 200 watts drive applied to it. The owner said it was toast and wanted me to put new tubes in it. For grins I powered it up. The tubes did light. When I k
/archives//html/Amps/2009-01/msg00181.html (8,793 bytes)

26. [Amps] New, used, or burned out? (score: 1)
Author: "Mike & Becca Krzystyniak" <k9mk@flash.net>
Date: Mon, 16 Feb 2009 16:07:13 -0600
Howdy, I'm tring to replace or repair a band switch for a Yaesu FL2100B. Anyone have a NOS replacement laying around? OR, Anyone have a damaged one sitting in their drawer left over from a previous r
/archives//html/Amps/2009-02/msg00520.html (7,327 bytes)

27. [Amps] Advanced Radio Devices Model 230C (score: 1)
Author: "Mike & Becca Krzystyniak" <k9mk@flash.net>
Date: Thu, 5 Mar 2009 16:35:13 -0600
I picked up an ARD-230C Linear Amp from a friend exiting the hobby. The amp uses three 3CX800's and appears to be 160m - 10m auto tune with a remote head. But I do not have any other docs with it. He
/archives//html/Amps/2009-03/msg00184.html (8,152 bytes)

28. [Amps] 160M tank toroid additiona or Mods to Alpha PA-70-V (score: 1)
Author: "Mike & Becca Krzystyniak" <k9mk@flash.net>
Date: Sun, 19 Apr 2009 17:27:35 -0500
I'm looking for the mod details to add 160M toroid and whatever else I need to do to get my Alpha PA-70-V to tune up on 160m. My first PA-70-V was already modified when I bought it and the details of
/archives//html/Amps/2009-04/msg00168.html (7,582 bytes)

29. Re: [Amps] 8874? 8877 (score: 1)
Author: "Mike & Becca Krzystyniak" <k9mk@flash.net>
Date: Wed, 1 Jul 2009 07:12:45 -0500
I have owned three. The one I currently have is SN#0114. Better than a tricked out SB220 they are not Alpha's... In mine, both the power supply lytics and some of the door knobs have been upgraded. 1
/archives//html/Amps/2009-07/msg00003.html (9,836 bytes)

30. [Amps] Plate bypass caps. (score: 1)
Author: "Mike & Becca Krzystyniak" <k9mk@flash.net>
Date: Sun, 5 Jul 2009 10:42:01 -0500
Question on plate bypass chokes and associated caps: I have Dentron amp with 160m on it, but the bypass cap at base is 1000pf. Then there is a smaller maybe 10 turn choke of #12 enamel wire going to
/archives//html/Amps/2009-07/msg00114.html (9,567 bytes)

31. [Amps] Russian Doorknob Caps (score: 1)
Author: "Mike & Becca Krzystyniak" <k9mk@flash.net>
Date: Thu, 9 Jul 2009 09:30:58 -0500
Are these Russian doorknob caps seen for sale on eBay suitable for use in 160-6M KW amps? K9MK _______________________________________________ Amps mailing list Amps@contesting.com http://lists.conte
/archives//html/Amps/2009-07/msg00137.html (6,708 bytes)

32. [Amps] Help on Bird Model 4342 Dual Wattmeter VSWR Monitor (score: 1)
Author: "Mike & Becca Krzystyniak" <k9mk@flash.net>
Date: Sat, 11 Jul 2009 19:37:56 -0500
I have a Bird Dual Wattmeter VSWR Monitor, model 4342. This is not the rack mounted unit. It looks more like a model 43 on steroids. It has a cross needle meter that displays forward and refelcted po
/archives//html/Amps/2009-07/msg00153.html (8,202 bytes)

33. Re: [Amps] Commander HF-1250 problems (score: 1)
Author: "Mike & Becca Krzystyniak" <k9mk@flash.net>
Date: Thu, 16 Jul 2009 10:33:16 -0500
Doug, I have an early model Commander amp with a similar HV problem. Turns out they used a type of 1 Meg metering resistors that ages. Over time the 1Meg Ohm value shifted some up 40-50% and the 1 Me
/archives//html/Amps/2009-07/msg00201.html (9,299 bytes)

34. Re: [Amps] Ts-940s linear relay (score: 1)
Author: k9mk@flash.net
Date: Tue, 20 Oct 2009 15:30:49 +0000
Deja vous! I repaired a guys amp relay TS-940S just last Sunday. In this unit the amp relay was made by Omron and looks like it should be good for up to an amp. The relay was actually fine, but was l
/archives//html/Amps/2009-10/msg00279.html (9,214 bytes)

35. Re: [Amps] Alternative cooling strategies for SB-220? (score: 1)
Author: "Mike using AT&T" <k9mk@flash.net>
Date: Thu, 17 Dec 2009 15:48:47 -0600
The 70V uses a 3CV1500A7. Instant on and water cooled, it does not get better than this... Mike K9MK --Original Message-- From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On Beh
/archives//html/Amps/2009-12/msg00487.html (12,928 bytes)

36. Re: [Amps] liquid cooling (score: 1)
Author: "Mike & Becca Krzystyniak" <k9mk@flash.net>
Date: Mon, 5 Apr 2010 11:33:07 -0500
Larry, Call me chicken but any discussion about using cooloants with flash points or other has a waft of Darwinism associated with it... Water: Inherently Safe. ATF: Inherently Unsafe. Mike K9MK The
/archives//html/Amps/2010-04/msg00097.html (9,880 bytes)

37. [Amps] 811A vs. 811H amp power output questions (score: 1)
Author: "Mike & Becca Krzystyniak" <k9mk@flash.net>
Date: Sat, 22 May 2010 10:41:04 -0500
A friend has a Ameritron 811A amp. Claims it puts out ~700+ watts into a DL. Recently he bought a pristine Ameritron 811H amp. But surprisingly it only puts out ~600 watts. He drops in 4 new tubes an
/archives//html/Amps/2010-05/msg00294.html (7,334 bytes)

38. Re: [Amps] 811A vs. 811H amp power output questions (score: 1)
Author: "Mike & Becca Krzystyniak" <k9mk@flash.net>
Date: Sat, 22 May 2010 11:06:23 -0500
That may be true, but in my opinion the tubes spec gain of 13 dB, 65 watts should have driven the 811H amp to at least the same output power as the 811A amp. And I would think with 4 tubes the max Po
/archives//html/Amps/2010-05/msg00296.html (10,206 bytes)

39. Re: [Amps] Can I cool too much the tubes? (score: 1)
Author: "Mike & Becca Krzystyniak" <k9mk@flash.net>
Date: Mon, 16 Aug 2010 12:09:57 -0500
If you put too much air around a tube, won't the aerodynamics of the convection structure come into play creating votexes and/or diversion of or an uneven airflow past select surface area that needs
/archives//html/Amps/2010-08/msg00252.html (10,156 bytes)

40. [Amps] Heath SB1000 blowing fuses, fault finding suggestions. (score: 1)
Author: "Mike & Becca Krzystyniak" <k9mk@flash.net>
Date: Thu, 7 Oct 2010 08:22:41 -0500
I'm working on a SB1000 from an estate that sat idle for maybe a decade, and prior to that it had little use. Last known it was working but now it is blowing fuses... I have pulled both HV secondary
/archives//html/Amps/2010-10/msg00082.html (8,349 bytes)

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