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Total 46 documents matching your query.

1. Re: [Amps] Henry 4K-Ultra Schematic Error (score: 1)
Author: "Dan Hearn" <dhearn@air-pipe.com>
Date: Thu, 29 Jun 2006 07:39:38 -0700
Bob, have you checked with Radiodan, distributor for Henry? http://www.radiodan.com/hamindex.htm 73, Dan, N5AR --Original Message-- From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.c
/archives//html/Amps/2006-06/msg00631.html (9,856 bytes)

2. Re: [Amps] RF Chokes (score: 1)
Author: "Dan Hearn" <dhearn@air-pipe.com>
Date: Mon, 17 Jul 2006 06:41:53 -0700
Peter, I recall an article I saw 10 or more years ago where a guy was trying to move the resonance of the RFC in an Alpha amp .He did it by using a single turn loop of HV insulated wire around the RF
/archives//html/Amps/2006-07/msg00511.html (8,246 bytes)

3. Re: [Amps] Mechanical question (score: 1)
Author: "Dan Hearn" <dhearn@air-pipe.com>
Date: Fri, 11 Aug 2006 11:15:06 -0700
Copper and brass are extremely difficult to dtill with conventional drill bits. The drill will grab and possibly break. It may even lift the drill press vise up. Very dangerous. Machinists grind the
/archives//html/Amps/2006-08/msg00410.html (9,774 bytes)

4. Re: [Amps] NOS 4CX1000A test and reconditioning (score: 1)
Author: "Dan Hearn" <dhearn@air-pipe.com>
Date: Fri, 8 Sep 2006 09:19:53 -0700
Good information here. http://kk5dr.com/Tubes.html 73, Dan, N5AR PS,I want to how to test and recondition thoriated tungsten tube ex. 4X500A too.Thanks! 73! Hsu ______________________________________
/archives//html/Amps/2006-09/msg00142.html (7,669 bytes)

5. Re: [Amps] TL-922 Cooling (score: 1)
Author: "Dan Hearn" <dhearn@air-pipe.com>
Date: Sun, 10 Sep 2006 07:08:55 -0700
Mine blows out of the box as yours does. 73, Dan, N5AR Anybody own a Kenwood TL-922? Can you tell me which way your cooling fan blows? Does it blow cool air into the amp and onto the tubes or does it
/archives//html/Amps/2006-09/msg00169.html (7,943 bytes)

6. [Amps] Amp parts (score: 1)
Author: "Dan Hearn" <dhearn@air-pipe.com>
Date: Tue, 19 Sep 2006 13:48:58 -0700
The Spokane DX Association will have for sale a number of amp parts from the estate of an SK amp builder at the Washington State Convention in Spokane this Saturday, Sept 23. These include inductors,
/archives//html/Amps/2006-09/msg00227.html (6,498 bytes)

7. [Amps] Price Help (score: 1)
Author: "Dan Hearn" <dhearn@air-pipe.com>
Date: Wed, 20 Sep 2006 07:51:51 -0700
Our club will have several 4-1000A and 4-400 tubes for sale at the convention this weekend. All pass an ohmeter test for filament continuity and no element shorts. What would be a reasonable price fo
/archives//html/Amps/2006-09/msg00245.html (6,347 bytes)

8. [Amps] Price Help (score: 1)
Author: "Dan Hearn" <dhearn@air-pipe.com>
Date: Wed, 20 Sep 2006 12:39:13 -0700
Tnx to K7FM,W6FR and Lou for their info. I feel my question has been answered. 73, Dan, N5AR _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contest
/archives//html/Amps/2006-09/msg00247.html (6,229 bytes)

9. Re: [Amps] 3cpx800a7 or similar tube storage (score: 1)
Author: "Dan Hearn" <dhearn@air-pipe.com>
Date: Fri, 29 Sep 2006 18:44:23 -0700
I think most of your questions will be answered here. http://kk5dr.com/Tubes.html It is the most comprehensive and detailed information source on tube conditioning I have seen. 73, Dan, N5AR I have b
/archives//html/Amps/2006-09/msg00371.html (9,343 bytes)

10. Re: [Amps] What NOT to buy? (score: 1)
Author: "Dan Hearn" <dhearn@air-pipe.com>
Date: Mon, 23 Oct 2006 14:29:54 -0700
Bob, I am curious to know what you don't like about the TL922. I own several amps and use the 922 more than the others, primarily because of the instant warm up. I like the vernier tuning dials. It i
/archives//html/Amps/2006-10/msg00253.html (9,965 bytes)

11. Re: [Amps] drill bits (score: 1)
Author: "Dan Hearn" <dhearn@air-pipe.com>
Date: Mon, 30 Oct 2006 15:00:55 -0800
Clint is right. A machinist once told me that it is common to not put enough force on the drill. If you are not making chips you need more pressure. A drill which is not cutting is overheating, parti
/archives//html/Amps/2006-10/msg00309.html (8,932 bytes)

12. Re: [Amps] 3-500 sockets (score: 1)
Author: "Dan Hearn" <dhearn@air-pipe.com>
Date: Mon, 11 Dec 2006 08:54:15 -0800
I suggest trying a Dremel type tool. One of my friends has an Alpha amp which he had to return to Alpha for repair. He needed to remove the pwr xfmr for shipping. He had messed up the cabinet screw h
/archives//html/Amps/2006-12/msg00064.html (9,384 bytes)

13. Re: [Amps] B&W FC-30 Filament Choke: EPILOGUE (score: 1)
Author: "Dan Hearn" <dhearn@air-pipe.com>
Date: Sun, 4 Mar 2007 06:30:35 -0800
Eddy, I recall an article in QST many years ago about TVI elimination in which fly back TV cores were used. I believe there was a comment that these cores are low frequency jobs and, in the TVI funct
/archives//html/Amps/2007-03/msg00050.html (10,196 bytes)

14. [Amps] HV rectifiers (score: 1)
Author: "Dan Hearn" <dhearn@air-pipe.com>
Date: Fri, 16 Mar 2007 20:44:42 -0700
If anyone is interested in HV rectifiers I have a number for sale. You can see pictures and info at www.sdxa.org click on "for sale" My e mail ads is not correct, it is dhearn@air-pipe.com Any amps m
/archives//html/Amps/2007-03/msg00193.html (6,345 bytes)

15. Re: [Amps] drive power (score: 1)
Author: "Dan Hearn" <dhearn@air-pipe.com>
Date: Sat, 17 Mar 2007 08:15:06 -0700
Steve, You are fortunate to have some excess drive power. The distortion in your exciter will be greater at 100w out than it will be at 50 or 60 w out. Turn the drive down on your exciter. Most moder
/archives//html/Amps/2007-03/msg00198.html (9,110 bytes)

16. Re: [Amps] 8877 blower requirement...TXN ! Now..Airflow sensing ? (score: 1)
Author: "Dan Hearn" <dhearn@air-pipe.com>
Date: Mon, 9 Apr 2007 07:04:09 -0700
Hugh, I recently sold a bunch of amp parts to a fellow ham which included a very sensitive microswitch with a vane on it which was used for that exact purpose. 73, Dan, N5AR --Original Message-- From
/archives//html/Amps/2007-04/msg00038.html (8,119 bytes)

17. Re: [Amps] Ceramic capacitor ratings (score: 1)
Author: "Dan Hearn" <dhearn@air-pipe.com>
Date: Thu, 12 Apr 2007 22:21:58 -0700
Gary, a similar question was asked several years ago on amps and I replied to it with values from some info I have on CRL doorknob ratings. I can't seem to locate my data but here is my post. My unde
/archives//html/Amps/2007-04/msg00103.html (8,811 bytes)

18. Re: [Amps] 2m W6PO input T network tuning....Problem solved ! (score: 1)
Author: "Dan Hearn" <dhearn@air-pipe.com>
Date: Sun, 29 Apr 2007 06:55:17 -0700
Howard, Your comments about using heavy wire or brass bars makes me uncomfortable thinking about thermal stress on socket contacts. I would think about using some thin material such as copper flashin
/archives//html/Amps/2007-04/msg00363.html (10,275 bytes)

19. Re: [Amps] Replacement plate choke for Alpha 76 (score: 1)
Author: "Dan Hearn" <dhearn@air-pipe.com>
Date: Mon, 21 May 2007 21:11:32 -0700
Joe;: Along that line I believe I once saw a mod for the RFC on the 76A as it had an undesired resonance on, I believe, 15 or 17m. The guy made a single turn of insulated buss wire around the choke.
/archives//html/Amps/2007-05/msg00158.html (8,409 bytes)

20. Re: [Amps] parts needed (score: 1)
Author: "Dan Hearn" <dhearn@air-pipe.com>
Date: Sat, 2 Jun 2007 19:57:31 -0700
Vic: I have for sale a number of HV rectifier diodes, which may be applicable to your repair job. Some are single and some are dual units. There are photos of them at www.sdxa.org Click for sale and
/archives//html/Amps/2007-06/msg00008.html (7,868 bytes)

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