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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[Amps\]\s+AL\-1200\s+Pop\/Arching\,\s+756\s+Pro\s+II\s+failure\s*$/: 6 ]

Total 6 documents matching your query.

1. [Amps] AL-1200 Pop/Arching, 756 Pro II failure (score: 1)
Author: Dana Roode <K6NR@ARRL.net>
Date: Fri, 10 Oct 2003 21:40:48 -0700
A question for those with AL-1200 repair experience -- I bought a used AL-1200 amp a few months ago - it has a low serial number, 108, so I assume its pretty old. I have used it in several contests a
/archives//html/Amps/2003-10/msg00080.html (8,075 bytes)

2. Re: [Amps] AL-1200 Pop/Arching, 756 Pro II failure (score: 1)
Author: Bill Turner <wrt@dslextreme.com>
Date: Sat, 11 Oct 2003 09:10:49 -0700
_________________________________________________________ I had a similar experience with my AL-1200 which I bought when they first came out. In fact, it happened twice. In the first case, I was runn
/archives//html/Amps/2003-10/msg00088.html (8,508 bytes)

3. Re: [Amps] AL-1200 Pop/Arching, 756 Pro II failure (score: 1)
Author: R.Measures <r@somis.org>
Date: Sun, 12 Oct 2003 05:52:01 -0700
? I have heard reports of this too. It seems to me that the diameter of the conductors selected for Ameritron tank inductors needs to be greater in order to reduce I^2 x R loss. Also, adding a cooli
/archives//html/Amps/2003-10/msg00091.html (8,739 bytes)

4. Re: [Amps] AL-1200 Pop/Arching, 756 Pro II failure (score: 1)
Author: Bill Turner <wrt@dslextreme.com>
Date: Sun, 12 Oct 2003 06:28:35 -0700
_________________________________________________________ IIRC, part of the problem in the AL-1200 is the hot air from the tube exhaust is vented inside the cabinet instead of to the outside. Changin
/archives//html/Amps/2003-10/msg00093.html (8,042 bytes)

5. Re: [Amps] AL-1200 Pop/Arching, 756 Pro II failure (score: 1)
Author: Dana Roode <K6NR@ARRL.net>
Date: Sun, 12 Oct 2003 13:32:52 -0700
Bill/Others -- I found that the resister in the copper coil from the plate of the tube leading to the tank circuit had indeed come unsoldered. This may sound naive, but would this make an arc? The co
/archives//html/Amps/2003-10/msg00095.html (9,856 bytes)

6. Re: [Amps] AL-1200 Pop/Arching, 756 Pro II failure (score: 1)
Author: Dana Roode <K6NR@ARRL.net>
Date: Sun, 12 Oct 2003 13:43:57 -0700
Rich - - Does your AL-1200 have the "neutralization" circuit? I'm not sure, how do you tell? There is a small diameter red wire wrapped around a small toroid core feeding the +HV to the plate; there
/archives//html/Amps/2003-10/msg00096.html (8,470 bytes)

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