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Total 17 documents matching your query.

1. [Amps] looking for design (score: 1)
Author: Ulf Tjerneld <star@frizon.org>
Date: Sun, 22 Feb 2009 14:12:30 +0100
Hi All, I did experiment with some home built tube amplifiers back in the early 80's, but I was never really successful. Mostly, because it was hard locating surplus parts here in Sweden and my high-
/archives//html/Amps/2009-02/msg00641.html (8,001 bytes)

2. [Amps] Source for HV transformers in Europe (score: 1)
Author: Ulf Tjerneld <star@frizon.org>
Date: Sun, 01 Mar 2009 19:47:38 +0100
Hi all, Does anyone know of a good source for new HV transformers in Europe? I got some quotes from manufacturers here in Sweden, but they were in the 400 Euro range. Maybe there are some manfacurers
/archives//html/Amps/2009-03/msg00019.html (6,509 bytes)

3. [Amps] faulty yaesu 2100z (score: 1)
Author: Ulf Tjerneld <star@frizon.org>
Date: Sun, 08 Mar 2009 14:24:32 +0100
Hi Everyone, I just picked up a faulty 2100z for a 100 Euros. I thaught that I might be able to repair it and now I'm looking for some advice. The previos owner said it went dead with a bang a couple
/archives//html/Amps/2009-03/msg00242.html (7,253 bytes)

4. [Amps] Plate voltage for GS35B (score: 1)
Author: Ulf Tjerneld <star@frizon.org>
Date: Fri, 03 Apr 2009 12:26:07 +0200
Hi all, Does anyone know how much plate voltage the GS35B can take? I have a transformer here that will deliver 4700 volts DC after rectification, under no-load conditions. Sounds a little too much t
/archives//html/Amps/2009-04/msg00040.html (6,324 bytes)

5. [Amps] HV supply question (score: 1)
Author: Ulf Tjerneld <star@frizon.org>
Date: Wed, 08 Apr 2009 18:12:18 +0200
Hi all, I have noticed when I look on different HV supplys that sometimes the negative lead is connected to chassis ground and sometimes it is kept at a potential somewhat above ground by means of a
/archives//html/Amps/2009-04/msg00083.html (7,018 bytes)

6. Re: [Amps] Amps Digest, Vol 76, Issue 12 (score: 1)
Author: Ulf Tjerneld <star@frizon.org>
Date: Thu, 09 Apr 2009 07:50:51 +0200
amps-request@contesting.com skrev: Ian, Thanks for pointing out that the potential is still *below* chassis ground. Of course it is! Also, you triode board looks very interesting. I have some reading
/archives//html/Amps/2009-04/msg00100.html (7,478 bytes)

7. [Amps] first time questions (score: 1)
Author: Ulf Tjerneld <star@frizon.org>
Date: Sat, 16 May 2009 17:38:44 +0200
Hi all, I'm collecting parts for an amp-project. And I have som newbie questions: 1, Maybe this question is silly: When calculating the Pi network for an amplifier with GI7-B's I'm aiming for an unlo
/archives//html/Amps/2009-05/msg00091.html (7,496 bytes)

8. [Amps] finding a good blower in Europe? (score: 1)
Author: Ulf Tjerneld <star@frizon.org>
Date: Tue, 22 Sep 2009 10:10:44 +0200
Hi all, Does anyone know where I can find a blower for my GU74B project in Europe? The problem is not to find a blower, but to find a blower small enough to fit into the cabinet. Where do the Europea
/archives//html/Amps/2009-09/msg00258.html (6,828 bytes)

9. [Amps] GU74 and all voltages on the same transformer? (score: 1)
Author: Ulf Tjerneld <star@frizon.org>
Date: Mon, 12 Oct 2009 09:23:26 +0200
Hi all, I'm projecting an amplifier with a GU74B. The transformer I intend to use has all voltages; plate, screen and filament on the same core. This means that basically all voltages will be applied
/archives//html/Amps/2009-10/msg00179.html (7,198 bytes)

10. [Amps] PSU design question (score: 1)
Author: Ulf Tjerneld <star@frizon.org>
Date: Fri, 6 Nov 2009 19:47:58 +0100
Hi all, There is one thing I still haven't been able to understand; It is the question about having B- a little bit above ground. I have now read tons of info on the subject and I do get the basic id
/archives//html/Amps/2009-11/msg00084.html (8,051 bytes)

11. [Amps] PSU design question (score: 1)
Author: Ulf Tjerneld <star@frizon.org>
Date: Sat, 7 Nov 2009 17:28:31 +0100
Hi all, Thank you for all great replies to my question! I understand now it is enough with only a couple of ohms for the B- to chassis resistor. However, contrary to this I came across a couple of ar
/archives//html/Amps/2009-11/msg00105.html (8,873 bytes)

12. [Amps] N8GPQ GLA 1000 mod pages? (score: 1)
Author: Ulf Tjerneld <star@frizon.org>
Date: Wed, 9 Dec 2009 22:44:19 +0100
Does anyone have a back up of these pages? They are off-line! 73's SM0NOR / ULf _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailm
/archives//html/Amps/2009-12/msg00249.html (6,287 bytes)

13. [Amps] GU 74 operating parameters (score: 1)
Author: Ulf Tjerneld <star@frizon.org>
Date: Wed, 6 Jan 2010 19:26:34 +0100
Hi all, I'm building my first amplifier - or my first serious amplifier that is. The chosen tube is a GU74B and I'm wondering about the operating parameters when I'm designing the Pi-L filter. I have
/archives//html/Amps/2010-01/msg00027.html (7,616 bytes)

14. [Amps] L section of Pi-L filter (score: 1)
Author: Ulf Tjerneld <star@frizon.org>
Date: Wed, 6 Jan 2010 19:33:05 +0100
Hi, Question 1: I'm considering using toroids in the L-section of my RF tank. Are there any guidelines regarding suitable cores, wires and turns? Question 2: If I stay with a traditional air wound co
/archives//html/Amps/2010-01/msg00028.html (6,810 bytes)

15. Re: [Amps] GU 74 operating parameters (score: 1)
Author: Ulf Tjerneld <star@frizon.org>
Date: Thu, 7 Jan 2010 15:35:04 +0100
Yet there are many commercial amp manufacturers, Acom among them, running GU74 on a plate voltage well above 2500 volts and at the same time claiming a 1 KW output. That means they are really exceedi
/archives//html/Amps/2010-01/msg00043.html (8,955 bytes)

16. [Amps] amplifier - first try! (score: 1)
Author: Ulf Tjerneld <star@frizon.org>
Date: Fri, 19 Feb 2010 10:03:25 +0100
Hi all, I have just completed my first home built amplifier and now and I'm doing some test runs with low plate voltage. It is a simple GG circuit around a Gi7b. Before running RF test I decided to h
/archives//html/Amps/2010-02/msg00557.html (7,029 bytes)

17. Re: [Amps] antek web site (score: 1)
Author: Ulf Tjerneld <star@frizon.org>
Date: Sat, 24 Apr 2010 07:55:44 +0200
I've had there site on my radar for while. They seem to have a pretty large selection of transformers and all of them shows "100 in stock". And the price is competitive. It almost looks too good....
/archives//html/Amps/2010-04/msg00635.html (8,921 bytes)

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