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1. [Amps] GI-7b amp (score: 1): Author: Stan Gammons <s_gammons@charter.net>; Date: Tue, 07 Nov 2017 14:03:30 -0600; Hi All, I was looking at "The Everyham's Amplifier" in the latest handbook and it mentions using a pair of GI-7B tubes. I have a pair of these I was going to use for a Clipperton L conversion, but I; /archives//html/Amps/2017-11/msg00053.html (6,642 bytes)
2. Re: [Amps] Problem with my Henry 2K-4A (score: 1): Author: Stan Gammons <s_gammons@charter.net>; Date: Tue, 7 Nov 2017 21:53:21 -0600; Every time I've seen negative grid current it was due to a shorted tube. You might try taking one of the tubes out and seeing if you can isolate it to a single tube. I don't know what experience you; /archives//html/Amps/2017-11/msg00060.html (9,024 bytes)
3. Re: [Amps] GI-7b amp (score: 1): Author: Stan Gammons <s_gammons@charter.net>; Date: Wed, 08 Nov 2017 14:32:57 -0600; Thanks everyone for your on-list and off-list replies. Think I'll add this project to the to do list. 73 Stan KM4HQE _______________________________________________ Amps mailing list Amps@contesting.; /archives//html/Amps/2017-11/msg00078.html (9,517 bytes)
4. Re: [Amps] Easy question. (score: 1): Author: Stan Gammons <s_gammons@charter.net>; Date: Wed, 8 Nov 2017 18:16:20 -0600; I got the tubes from Dr Alex, UR4LL. The GI-7BT's are what I got. They are supposed to be a little more rugged than the GI-7B. Seems like I got the sockets and bias board from K4POZ. In the 2018 hand; /archives//html/Amps/2017-11/msg00084.html (7,525 bytes)
5. Re: [Amps] Life of tubes in ham service (score: 1): Author: Stan Gammons <s_gammons@charter.net>; Date: Wed, 27 Dec 2017 20:59:46 -0600; How does one go about identifying what mfg made the Russian tubes? The GI-7BT's I have have purple ceramic. They have some marking on them, but no mfg name. One of these days I'll get around to bu; /archives//html/Amps/2017-12/msg00180.html (16,266 bytes)
6. Re: [Amps] Life of tubes in ham service (score: 1): Author: Stan Gammons <s_gammons@charter.net>; Date: Thu, 28 Dec 2017 17:39:09 -0600; On 12/28/2017 01:15 AM, Roger (K8RI) wrote: "I think" the GI-7B would be an easy tube to convert to transverse cooling to replace the no longer available Eimac tubes in the MLA-2500s. The coolers ar; /archives//html/Amps/2017-12/msg00186.html (9,903 bytes)
7. Re: [Amps] MLA2500 Power Switch (score: 1): Author: Stan Gammons <s_gammons@charter.net>; Date: Tue, 30 Jan 2018 23:14:25 -0600; Best bet would likely be Mouser or Digi-Key. Take a digital micrometer and measure the dimensions of the switch body. Search for a rocker switch of similar ratings on the Mouser or Digi-Key websit; /archives//html/Amps/2018-02/msg00002.html (8,260 bytes)
8. Re: [Amps] water purity/conductivity in water cooled tube amplifiers (score: 1): Author: Stan Gammons <s_gammons@charter.net>; Date: Sat, 14 Apr 2018 22:49:47 -0500; I seem to recall the Eimac handbook "Care and feeding of power grid tubes" having a section on water cooling. The only thing I recall being water cooled were the 100 Kw plus SW transmitters made by; /archives//html/Amps/2018-04/msg00030.html (12,395 bytes)
9. Re: [Amps] Lube for roller inductor (score: 1): Author: Stan Gammons <s_gammons@charter.net>; Date: Sun, 29 Jul 2018 22:29:13 -0500; I would suggest one of the CAIG DeOxit products, e.g. DeOxit 5. Bert VE3NR Kind of reviving this thread since I have a roller inductor that was acting a bit flaky, so I took it out and gave it a good; /archives//html/Amps/2018-08/msg00001.html (7,691 bytes)
10. Re: [Amps] Lube for roller inductor (score: 1): Author: Stan Gammons <s_gammons@charter.net>; Date: Wed, 01 Aug 2018 14:38:27 -0500; Hi Carl, MFJ said they use SAF-T-EZE anti-seize. Oren Elliot no longer makes roller inductors. They said they stopped selling them to MFJ around 20 years ago and MFJ makes their own roller inductors; /archives//html/Amps/2018-08/msg00006.html (10,100 bytes)
11. Re: [Amps] Lube for roller inductor (score: 1): Author: Stan Gammons <s_gammons@charter.net>; Date: Wed, 1 Aug 2018 16:30:33 -0500; I forgot to say MFJ also said the SAF-T-EZ is kind of thick, so they mix a little 10W40 oil with it to thin it. 73 Stan KM4HQE Carl I would suggest one of the CAIG DeOxit products, e.g. DeOxit 5. Ber; /archives//html/Amps/2018-08/msg00007.html (9,964 bytes)
12. Re: [Amps] Lube for roller inductor (score: 1): Author: Stan Gammons <s_gammons@charter.net>; Date: Wed, 1 Aug 2018 18:38:27 -0500; Hi Carl, I had taken the roller inductor out of the MFJ tuner to clean the roller since a couple of spots made a noticeable amount of static in the received signal when I tuned across those spots on; /archives//html/Amps/2018-08/msg00009.html (12,676 bytes)
13. Re: [Amps] Lube for roller inductor (score: 1): Author: Stan Gammons <s_gammons@charter.net>; Date: Wed, 01 Aug 2018 20:38:58 -0500; It may be silver plated copper wound on a ceramic form. It's all nice and shiny though. Silver will tarnish over time. I'd think it would be black like the coil in my L-4B. I about have to use a tune; /archives//html/Amps/2018-08/msg00012.html (15,476 bytes)
14. Re: [Amps] High temp magnet wire? (score: 1): Author: Stan Gammons <s_gammons@charter.net>; Date: Sun, 2 Dec 2018 20:08:55 -0600; http://www.amidoncorp.com/thermaleze-coated-magnet-wire/ 73 Stan KM4HQE Any ideas? Need high temp rating for a plate choke rebuild. 73 Tim K3LR _______________________________________________ Amps ma; /archives//html/Amps/2018-12/msg00004.html (7,353 bytes)
15. Re: [Amps] 3-500Z labeling (score: 1): Author: Stan Gammons <s_gammons@charter.net>; Date: Fri, 7 Dec 2018 20:46:17 -0600; Could be Amperex or RF Parts tubes. https://www.rfparts.com/ 73 Stan KM4HQE - Paul KW7Y _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting; /archives//html/Amps/2018-12/msg00044.html (7,922 bytes)
16. Re: [Amps] 3-500Z labeling (score: 1): Author: Stan Gammons <s_gammons@charter.net>; Date: Sun, 9 Dec 2018 22:10:52 -0600; Probably RF parts tubes. The RF parts 3-500ZG tubes in my L-4B have 5 disc. Seems like the Amperex ones have 4 disc. All of the Eimac plates I've seen were vertical and corrugated shaped. Eimac made; /archives//html/Amps/2018-12/msg00070.html (9,375 bytes)
17. Re: [Amps] 3-500Z labeling (score: 1): Author: Stan Gammons <s_gammons@charter.net>; Date: Mon, 10 Dec 2018 14:16:24 -0600; Hi Jim, Cool! I've never seen an Eimac graphite plate 3-500. Thanks for sharing that info! 73 Stan KM4HQE _______________________________________________ Amps mailing list Amps@contesting.com http://; /archives//html/Amps/2018-12/msg00077.html (11,362 bytes)
18. Re: [Amps] L4B startup after a long sleep? (score: 1): Author: Stan Gammons <s_gammons@charter.net>; Date: Tue, 11 Dec 2018 22:42:33 -0600; I would set the meter to grid current and use a variac to first power it up. Unless you have a 240 volt AC variac, you may have to rewire the power supply and RF deck for a 110 volts AC variac. There; /archives//html/Amps/2018-12/msg00081.html (7,992 bytes)
19. Re: [Amps] SS Amps are expensive...why? (score: 1): Author: Stan Gammons <s_gammons@charter.net>; Date: Fri, 25 Jan 2019 17:56:38 -0600; I see the W6PQL amp kit came up in this thread. Does anyone here have that amp? I haven't priced all of it out, but it looks like it cost about the same as other kits. Does the W6PQL HF SS amp perfo; /archives//html/Amps/2019-01/msg00138.html (12,947 bytes)
20. [Amps] Clipperton L front panel (score: 1): Author: Stan Gammons <s_gammons@charter.net>; Date: Tue, 9 Jul 2019 20:22:05 -0500; Anyone have a Clipperton L front panel that is excess of your needs? If so, contact me of list. Thanks. 73 Stan KM4HQE _______________________________________________ Amps mailing list Amps@contesti; /archives//html/Amps/2019-07/msg00006.html (6,321 bytes)

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