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References: [ +from:thomascarl@gmail.com: 14 ]

Total 14 documents matching your query.

1. [Amps] ALPHA 77 Link Chain for the 2 x Load Capacitors (score: 1)
Author: "Thomas Carlsson" <thomascarl@gmail.com>
Date: Sat, 25 Aug 2007 12:37:41 +0300
Please, can anyone give me a hint where I can buy a Link-Chain for the 2 x Load Capacitors. Not the Chain for the Band Switch! It is for an ALPHA 77Sx but I assume all ALPHA 77 are the same in this r
/archives//html/Amps/2007-08/msg00182.html (6,602 bytes)

2. Re: [Amps] Alpha 87 schematics (score: 1)
Author: "Thomas Carlsson" <thomascarl@gmail.com>
Date: Tue, 11 Dec 2007 15:31:31 +0300
Ulf, Alpha has many very nice amplifiers, usually good quality and very fun to work on. Documentation is another matter. I have been working on Alpha 77Sx and 91b, for the 77Sx I have the manual that
/archives//html/Amps/2007-12/msg00130.html (8,575 bytes)

3. [Amps] GU74b from PA7TWO (score: 1)
Author: "Thomas Carlsson" <thomascarl@gmail.com>
Date: Tue, 29 Jul 2008 11:30:28 -0300
I purchased two GU74b from Kees in Holland "Kees - pa7two" <pa7two@hotmail.com>, They were delivered very well packed, no major hazards there. Kees even sent me a photo of the box before it was close
/archives//html/Amps/2008-07/msg00350.html (7,193 bytes)

4. Re: [Amps] Amp Supply LK800 trouble (score: 1)
Author: "Thomas Carlsson" <thomascarl@gmail.com>
Date: Thu, 21 Aug 2008 19:52:23 -0300
Load cap has no effect! Does this happen on all bands? May be the fixed cap's that are inserted in parallell with Load cap... switched in various quantities depending on band. Checked that thet are s
/archives//html/Amps/2008-08/msg00121.html (11,188 bytes)

5. [Amps] ALPHA 91b Power Supply Problem Need Hints (score: 1)
Author: Thomas Carlsson <thomascarl@gmail.com>
Date: Thu, 2 Apr 2009 11:54:56 -0300
Have happily been running my Alpha 91b, day before WPX SSB it made a bang and blew its 20A Fuses. All voltages OK as long as I do not connect the HV winding of the transformer to the Power Supply (PS
/archives//html/Amps/2009-04/msg00029.html (8,268 bytes)

6. Re: [Amps] DEAD Alpha 91B (score: 1)
Author: Thomas Carlsson <thomascarl@gmail.com>
Date: Mon, 18 May 2009 12:33:19 -0300
Mike,I have also had experience with this resistor and also found a design falw in this circuit. You also better check if the diode D1 is OK. It looks to me that the relay K1 (AC ON) is designed for
/archives//html/Amps/2009-05/msg00105.html (11,054 bytes)

7. Re: [Amps] DEAD Alpha 91B (score: 1)
Author: Thomas Carlsson <thomascarl@gmail.com>
Date: Mon, 18 May 2009 13:42:19 -0300
ALPHA 91b has the fan connected to (almost) the center tap.In original version is is connected to the 100V level and the manual suggest it to be moved to the 120V level (the real center tap) for 220V
/archives//html/Amps/2009-05/msg00108.html (9,238 bytes)

8. Re: [Amps] grounding grids (score: 1)
Author: Thomas Carlsson <thomascarl@gmail.com>
Date: Thu, 30 Jul 2009 23:00:16 -0300
Interesting addition: LK-500 and its brothers have Grids direct to Ground, no components.Cathode resistor only 0.15ohm/3W. SB220 and L4(B) both 1ohm in cathode and they have the same grid components,
/archives//html/Amps/2009-07/msg00420.html (9,990 bytes)

9. Re: [Amps] Svetlana 4CX800 (score: 1)
Author: Thomas Carlsson <thomascarl@gmail.com>
Date: Tue, 8 Dec 2009 15:00:07 -0200
I recommend Kees, PA7TWO... using those tubes in my ALPHA 91b for more than a year now. Good and quick service. 73, Thomas, PY2ZXU/SM0CXU -- Thomas, PY2ZXU/SM0CXU Member of the PW2D Team ____________
/archives//html/Amps/2009-12/msg00228.html (10,356 bytes)

10. Re: [Amps] Fan for SB220 (score: 1)
Author: Thomas Carlsson <thomascarl@gmail.com>
Date: Fri, 17 Dec 2010 19:58:42 -0200
Sorry, but I feel we are in for a misunderstanding here. I have seen suggestions to paint inside, existing shielding black, to minimize heat reflection and maximize heat absorbation. Have nothing see
/archives//html/Amps/2010-12/msg00194.html (9,861 bytes)

11. Re: [Amps] home brew 811a amp - need some advice (score: 1)
Author: Thomas Carlsson <thomascarl@gmail.com>
Date: Tue, 20 Dec 2011 06:51:39 -0200
Hej, Några av kommentarerna följer mina tankar, Fukt i trafon som orsakat kortis mellan primär o sekundär, i så fall ny Trafo Det är inte röret som behöver step start utan det är mest för att skydda
/archives//html/Amps/2011-12/msg00153.html (13,192 bytes)

12. Re: [Amps] Coax for MHV connectors? (score: 1)
Author: Thomas Carlsson <thomascarl@gmail.com>
Date: Sat, 23 Jun 2012 20:01:38 -0300
Cheap and quite nice way to do it. Use Cable for spark-plugs and a spark-plug-cap. To mate the Spark-plug-cap take a cheramic isolator similar to what is used for antenna pass-through, usually the sc
/archives//html/Amps/2012-06/msg00384.html (8,789 bytes)

13. Re: [Amps] Need Zener for 2KD-3 - Part Deux (score: 1)
Author: Thomas Carlsson <thomascarl@gmail.com>
Date: Thu, 12 Feb 2015 22:53:43 +0100
Bill, I make the basic assumption that the Zener in your case is to set the Zero-signal Anode current (PTT and no signal) to the correct value. and that value you will find in the manual and the tube
/archives//html/Amps/2015-02/msg00093.html (11,492 bytes)

14. [Amps] Emtron DX3sp (score: 1)
Author: Thomas Carlsson <thomascarl@gmail.com>
Date: Tue, 2 Feb 2016 13:17:54 -0200
Any help or comment would be appreciated. The 6 x 100 ohm HV protection resistors burned some time ago and have been replaced by same type as well as a 3A fuse put in series with them, to change fuse
/archives//html/Amps/2016-02/msg00012.html (7,921 bytes)

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