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Total 25 documents matching your query.

1. [Amps] MLA-2500 Tube Conversion (score: 1): Author: "N4zed" <n4zed@comcast.net>; Date: Sun, 10 Oct 2021 10:59:08 -0400; Has anyone here attempted the tube conversion for the Dentron MLA-2500 from the 8875 tube to the 3CX800A7? I have the instructions laid out by LX2KL and I have a filament transformer for the tubes. T; /archives//html/Amps/2021-10/msg00005.html (6,408 bytes)
2. Re: [Amps] MLA-2500 Tube Conversion (score: 1): Author: Jay Sturtevant <k2ztdx@gmail.com>; Date: Sun, 10 Oct 2021 12:58:04 -0400; You might want to check with an expert on this forum to make sure your filament supply is correct. I run a pair of 3cx800A7s and the designer/builder stressed correct filament voltage, if I remember; /archives//html/Amps/2021-10/msg00006.html (7,728 bytes)
3. Re: [Amps] MLA-2500 Tube Conversion (score: 1): Author: Nidhog <robrk@nidhog.net>; Date: Sun, 10 Oct 2021 14:06:27 -0400; Even if you have the correct output filament transformer, check the primary. I have a few from the olden days of 115 line voltage. 4CX250s want 6.000. My 30L1 wants 115/230, not todays 120/240 +. The; /archives//html/Amps/2021-10/msg00008.html (7,255 bytes)
4. Re: [Amps] MLA-2500 Tube Conversion (score: 1): Author: "N4zed" <n4zed@comcast.net>; Date: Sun, 10 Oct 2021 15:04:59 -0400; Thanks Jay, I have the correct filament transformer. Ken N4zed From: Jay Sturtevant <k2ztdx@gmail.com> Sent: Sunday, October 10, 2021 12:58 PM To: N4zed <n4zed@comcast.net> Cc: Amplifier Reflector <A; /archives//html/Amps/2021-10/msg00009.html (8,615 bytes)
5. Re: [Amps] MLA-2500 Tube Conversion (score: 1): Author: "N4zed" <n4zed@comcast.net>; Date: Sun, 10 Oct 2021 15:08:55 -0400; Thanks Jay Ken N4zed Even if you have the correct output filament transformer, check the primary. I have a few from the olden days of 115 line voltage. 4CX250s want 6.000. My 30L1 wants 115/230, not; /archives//html/Amps/2021-10/msg00010.html (8,597 bytes)
6. Re: [Amps] MLA-2500 Tube Conversion (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Sun, 10 Oct 2021 15:22:22 -0400; The only good test for that is to hook up and measure with a load and a True RMS meter. There are still many new production 115/230V transformers being sold altho they test fine on 120/240 + circuits; /archives//html/Amps/2021-10/msg00012.html (9,501 bytes)
7. [Amps] MLA-2500 Tube Conversion (score: 1): Author: Roger Parsons via Amps <amps@contesting.com>; Date: Sun, 10 Oct 2021 21:41:52 +0000 (UTC); I converted an MLA2500 to a single 3CX800A7 some years ago, and it works fine. If I was doing it again I think I would probably use a pair of GI7Bs which are much cheaper. I don't think you need an e; /archives//html/Amps/2021-10/msg00015.html (7,811 bytes)
8. Re: [Amps] MLA-2500 Tube Conversion (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Sun, 10 Oct 2021 21:17:33 -0400; The GI-7B is fine if all you care about is CHEEEEEP. It also is a horrible tube for a linear and would sound great on 11M I converted an MLA2500 to a single 3CX800A7 some years ago, and it works fine; /archives//html/Amps/2021-10/msg00019.html (9,156 bytes)
9. Re: [Amps] MLA-2500 Tube Conversion (score: 1): Author: Roger Parsons via Amps <amps@contesting.com>; Date: Mon, 11 Oct 2021 13:41:23 +0000 (UTC); I have seen that comment previously. What I have never seen are any numbers or documents to support it. If any non-anecdotal sources exist I would be interested to see them. I converted a Clipperton; /archives//html/Amps/2021-10/msg00030.html (9,653 bytes)
10. Re: [Amps] MLA-2500 Tube Conversion (score: 1): Author: Mark - N5OT <r-emails@n5ot.com>; Date: Mon, 11 Oct 2021 09:26:12 -0500; I'm interested in that, too. I have an MLA-2500 carcass here sans tubes, and I have been wondering what to do with it. the GI7B conversion always seems to rise to the surface of that conversation.; /archives//html/Amps/2021-10/msg00031.html (10,673 bytes)
11. Re: [Amps] MLA-2500 Tube Conversion (score: 1): Author: Robert W5AJ <woodr90@gmail.com>; Date: Mon, 11 Oct 2021 12:17:54 -0500; https://w5aj.eqth.net/Rtubes.jpg Are the tubes in photo GI-7B? I don't find any markings on them but ham I bought from (decade ago perhaps) said GI-7B I'm asking because it's difficult to list these; /archives//html/Amps/2021-10/msg00037.html (10,350 bytes)
12. Re: [Amps] MLA-2500 Tube Conversion (score: 1): Author: Robert W5AJ <woodr90@gmail.com>; Date: Mon, 11 Oct 2021 19:02:52 -0500; Additionally Anyone located a supplier for the allen wrench head screws used to hold covers on?? Robert _______________________________________________ Amps mailing list Amps@contesting.com http://li; /archives//html/Amps/2021-10/msg00043.html (9,018 bytes)
13. Re: [Amps] MLA-2500 Tube Conversion (score: 1): Author: David Gow <6146guy@gmail.com>; Date: Mon, 11 Oct 2021 17:57:52 -0700; If they are metric hex wrenches any good hardware or commercial fastening house will have them and so does Amazon.. Be sure they are to Bristol wrench. If they are also easy to on Amazon or many othe; /archives//html/Amps/2021-10/msg00045.html (10,112 bytes)
14. Re: [Amps] MLA-2500 Tube Conversion (score: 1): Author: BILL KENNAMER <k5fuv@prodigy.net>; Date: Tue, 12 Oct 2021 02:41:37 +0000 (UTC); Mine are regular Allen screws in my MLA2500. Allen and Bristol wrenches not the same thing. I just use a regular old set of all sizes in one folding case. Bristol wrenches are used on old Collins equ; /archives//html/Amps/2021-10/msg00047.html (11,205 bytes)
15. Re: [Amps] MLA-2500 Tube Conversion (score: 1): Author: Kim Elmore <cw_de_n5op@sbcglobal.net>; Date: Mon, 11 Oct 2021 22:04:35 -0500; My dad had an MLA-2500. Theyre Allen head screws. Kim N5OP "People that make music together cannot be enemies, at least as long as the music lasts." -- Paul Hindemith ________________________________; /archives//html/Amps/2021-10/msg00050.html (12,292 bytes)
16. Re: [Amps] MLA-2500 Tube Conversion (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Mon, 11 Oct 2021 23:21:03 -0400; I'd bet on a 5/64" Allen but it's been 30+ years since I had my hands on an MLA-2500 so it could just as well have been 1/16"or 3/32" but nothing larger than that. 73, ... Joe, W4TV Kim N5OP "People; /archives//html/Amps/2021-10/msg00051.html (11,216 bytes)
17. Re: [Amps] MLA-2500 Tube Conversion (score: 1): Author: David Gow <6146guy@gmail.com>; Date: Mon, 11 Oct 2021 22:34:57 -0700; Excuse my bad typing. I meant to say to se sure they are NOT Bristol wrenches which were ny Hallicrafteres as well as Collins and still used in military and aviation applications. Glad to know yours; /archives//html/Amps/2021-10/msg00053.html (12,612 bytes)
18. Re: [Amps] MLA-2500 Tube Conversion (score: 1): Author: Roger Parsons via Amps <amps@contesting.com>; Date: Tue, 12 Oct 2021 13:28:22 +0000 (UTC); A 3/32" hex wrench fits OK, and the screw has an American thread. Definitely not metric. 73 Roger VE3ZI _______________________________________________ Amps mailing list Amps@contesting.com http://li; /archives//html/Amps/2021-10/msg00054.html (8,055 bytes)
19. Re: [Amps] MLA-2500 Tube Conversion (score: 1): Author: BILL KENNAMER <k5fuv@prodigy.net>; Date: Tue, 12 Oct 2021 15:24:44 +0000 (UTC); A source for Allen wrenches is any auto parts store. They can also be found at Lowes or Home Depot. Theyre common. K5FUV Sent from AT&T Yahoo Mail for iPad A 3/32" hex wrench fits OK, and the screw; /archives//html/Amps/2021-10/msg00057.html (8,510 bytes)
20. Re: [Amps] MLA-2500 Tube Conversion (score: 1): Author: "N4zed" <n4zed@comcast.net>; Date: Tue, 12 Oct 2021 19:09:01 -0400; Change them to philips head. Ken N4zed From: Robert W5AJ <woodr90@gmail.com> Sent: Monday, October 11, 2021 8:03 PM To: N4zed <n4zed@comcast.net> Cc: Amps group <Amps@contesting.com> Subject: Re: [Am; /archives//html/Amps/2021-10/msg00059.html (9,820 bytes)

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