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Total 10 documents matching your query.

1. [AMPS] GI-7B (score: 1): Author: tony@uch.net (CT HRD); Date: Wed, 29 Nov 2000 22:00:26 +0300; I have got 5 mint and shiny GI-7B tubes in the original boxes. They are great for HF-VHF-UHF, 400 W anode dissapation. If you take all 5 I will offer you a discount. 73 ! -- CT Ham Radio Devices (CT; /archives//html/Amps/2000-11/msg00434.html (6,698 bytes)
2. [Amps] Gi-7b (score: 1): Author: "Mike(W5UC) & Kathy(K5MWH)" <w5uc@cox.net>; Date: Mon, 26 Jun 2006 21:09:49 -0500; Good Evening All: I found this group while searching for information on the Gi-7b Russian tubes. So, here is the question. Has anyone used the Gi-7b in an amplifier? I am in the process of building a; /archives//html/Amps/2006-06/msg00484.html (7,236 bytes)
3. Re: [Amps] Gi-7b (score: 1): Author: Tony King - W4ZT <amps080605@w4zt.com>; Date: Mon, 26 Jun 2006 22:21:56 -0400; Mike, Take a look at the projects by W4EMF <http://w4emf.gs35b.com> and K4POZ, <http://k4poz.w4zt.com>. Treat the GI-7B like any other old tube. It's a very stable little tube that will give you 55 t; /archives//html/Amps/2006-06/msg00485.html (7,991 bytes)
4. Re: [Amps] Gi-7b (score: 1): Author: "Mike(W5UC) & Kathy(K5MWH)" <w5uc@cox.net>; Date: Mon, 26 Jun 2006 21:41:18 -0500; Thanks Tony. Great info. I guess if I can get 800 watts output on 6 meters I will be happy. Anything over that will be a bonus. I'm doing a running history of the project with my digital camera. I wi; /archives//html/Amps/2006-06/msg00486.html (8,729 bytes)
5. [Amps] GI-7B (score: 1): Author: MIKE DURKIN <patriot121@msn.com>; Date: Fri, 4 Dec 2009 22:06:11 -0800; GI-7B just a question about what the true limit of plate voltage is?? Is 3.8Kv too much ?? KC7NOA _________________________________________________________________ Windows Live Hotmail gives you a fr; /archives//html/Amps/2009-12/msg00122.html (6,581 bytes)
6. Re: [Amps] GI-7B (score: 1): Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>; Date: Sat, 5 Dec 2009 13:12:40 -0600; Mike, The tube will run at that voltage (it's pulse rated at something like 7KV or whatever so the problem of internal arc should not be the factor), but in my evaluation of a pair running from 1800v; /archives//html/Amps/2009-12/msg00127.html (8,379 bytes)
7. Re: [Amps] GI-7B (score: 1): Author: Ron Youvan <ka4inm@tampabay.rr.com>; Date: Sun, 06 Dec 2009 01:58:07 +0000; /*snip*/ Increasing the plate Voltage allows a tube/s to produce more RF power, (once you reach the current limit of the tube) within limits. My experience with high power transmitting tubes (IOT-D2; /archives//html/Amps/2009-12/msg00139.html (8,207 bytes)
8. Re: [Amps] GI-7B (score: 1): Author: "Gary Schafer" <garyschafer@comcast.net>; Date: Sun, 6 Dec 2009 00:11:25 -0500; I don't think that is so. True that a tube can make more power with higher voltage because it has more room for plate voltage swing before cutoff. But how cool a tube runs has nothing to do with IR; /archives//html/Amps/2009-12/msg00150.html (9,528 bytes)
9. Re: [Amps] GI-7B (score: 1): Author: MIKE DURKIN <patriot121@msn.com>; Date: Sun, 6 Dec 2009 07:02:53 -0800; Ok, the reason this came to me as a question is that i was thinking of replacing my 3-500Z's (one is arcing over - and had destroyed bias circuitry - which im almost done repairing) with a pair or 3; /archives//html/Amps/2009-12/msg00158.html (10,932 bytes)
10. Re: [Amps] GI-7B (score: 1): Author: "Jeff Blaine AC0C" <keepwalking188@yahoo.com>; Date: Sun, 6 Dec 2009 13:18:27 -0600; Guys, My amp is just one data point - maybe other guys have data on amp efficiency mapped against plate voltage. So don't make your final decision considering my comment - I could be wrong. Lot of ot; /archives//html/Amps/2009-12/msg00171.html (14,988 bytes)

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