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1. [Amps] 2879 biasing (score: 1)
Author: "Gene Bigham" <>
Date: Fri, 22 Aug 2003 13:18:50 -0500
I have ordered a matched quad of these transistors to put into my mobile amp and need to build a bias supply for them. Reading G3SEK on the subject gave some good pointers. I want to use this behind
/archives//html/Amps/2003-08/msg00018.html (6,519 bytes)

2. [Amps] Roller Inductor (score: 1)
Author: "Gene Bigham" <>
Date: Wed, 17 Sep 2003 11:09:57 -0500
A while back I posted difficulty with the roller inductor on my Henry 2K Classic X floor console built in 1992. This amp tunes the plate with a roller inductor and has fixed plate caps. The roller in
/archives//html/Amps/2003-09/msg00159.html (7,876 bytes)

3. [Amps] Henry 750? (score: 1)
Author: "Gene Bigham" <>
Date: Tue, 14 Oct 2003 11:09:05 -0500
One list member asked about a solid state amp, another said get a Henry. I too am interested in a solid state amp, am working on building one and have looked at SGC, Ameritron/Vectronics (aka MFJ), t
/archives//html/Amps/2003-10/msg00123.html (7,543 bytes)

4. [Amps] Transistor Bias (score: 1)
Author: "Gene Bigham" <>
Date: Fri, 17 Oct 2003 16:26:32 -0500
I have been looking at various bias supplies for the 2sc2879 transistor. I am going to run 4 of them in my amp. An appealingly simple diagram shows a 7808 (8v @ 1 amp) regulator supplying bias for a
/archives//html/Amps/2003-10/msg00157.html (6,971 bytes)

5. [Amps] Schematic ALS 500M (score: 1)
Author: "Gene Bigham" <>
Date: Mon, 3 Nov 2003 23:49:59 -0600
Schematic for ALS 500m I need a schematic for the ALS 500M anyone know where or can scan and send? Thanks Gene Bigham KB0GU _______________________________________________ Amps mailing list Amps@cont
/archives//html/Amps/2003-11/msg00030.html (6,676 bytes)

6. [Amps] Zero Crossing power switch? (score: 1)
Author: "Gene Bigham" <>
Date: Fri, 7 Nov 2003 11:03:56 -0600
What is a zero crossing power switch? _______________________________________________ Amps mailing list
/archives//html/Amps/2003-11/msg00091.html (6,619 bytes)

7. [Amps] Combiner & ALS500M's (score: 1)
Author: "Gene Bigham" <>
Date: Wed, 12 Nov 2003 00:00:02 -0600
Has anyone had the experience of using the combiner from RF Parts and two or more ALS500M's to get legal limit with these boxes? _______________________________________________ Amps mailing list Amps
/archives//html/Amps/2003-11/msg00158.html (6,629 bytes)

8. [Amps] ALS500M Question (score: 1)
Author: "Gene Bigham" <>
Date: Wed, 12 Nov 2003 11:08:26 -0600
I am wondering if anyone has used the RF Parts combiners and put together a couple of these amps, combining their outputs? I tried posting this before and it bounced back so if this is a duplicate pl
/archives//html/Amps/2003-11/msg00162.html (6,686 bytes)

9. [Amps] Re: Amps Digest, Vol 11, Issue 45 (score: 1)
Author: "Gene Bigham" <>
Date: Thu, 27 Nov 2003 12:06:45 -0600
Anyone experienced in combining power from a pair of ALS500M's please contact me. KB0GU Thank you _______________________________________________ Amps mailing list Amps@contesting.
/archives//html/Amps/2003-11/msg00383.html (6,739 bytes)

10. [Amps] 3-500z(G) (score: 1)
Author: "Gene Bigham" <>
Date: Wed, 10 Dec 2003 11:26:10 -0600
It is my understanding that the 3-500Z and now the heavier anode 3-500ZG's need to be run red to dull orange at times for the very reason you stated, so the getter can work. Perhaps it is not the col
/archives//html/Amps/2003-12/msg00154.html (7,092 bytes)

11. [Amps] Yaesu YS60 Meter (score: 1)
Author: "Gene Bigham" <>
Date: Sat, 20 Dec 2003 13:07:37 -0600
Well thought I would throw this out here. I have a Yaesu YS60 power meter that due to an antenna malfunction and a Henry 2K Classic X smoked. Disassembly reveals that one side of the pick up circuit
/archives//html/Amps/2003-12/msg00330.html (6,777 bytes)

12. [Amps] Feedback ( No Pun) from Eimac 3cx1500d7 (score: 1)
Author: "Gene Bigham" <>
Date: Sat, 20 Mar 2004 06:59:57 -0600
I wrote and asked about this tube, here is what I got back: "Thanks for your Email. I have been receiving inquiries for the past couple of days regarding this new product. It was an idea that languis
/archives//html/Amps/2004-03/msg00217.html (12,080 bytes)

13. [Amps] RFConcepts Mini-Amp 144 (score: 1)
Author: "Gene Bigham" <>
Date: Thu, 1 Apr 2004 08:20:52 -0600
I recently acquired a RFConcepts Mini-Amp 144, it is rated for 30 watts output. I was "told" it would work for SSB, however the relays for Rx pre-amp and Rx/Tx are chattering in the SSB mode. This is
/archives//html/Amps/2004-04/msg00004.html (7,506 bytes)

14. [Amps] 3-1000z (score: 1)
Author: "Gene Bigham" <>
Date: Fri, 23 Apr 2004 11:02:12 -0500
I built what is basically the amplifier out of the Handbook from years ago for the 3-1000z tube. That amp was featured several years in the handbook. My design varied little from what the handbook ca
/archives//html/Amps/2004-04/msg00156.html (7,087 bytes)

15. [Amps] Solid State AMP (score: 1)
Author: "Gene Bigham" <>
Date: Fri, 30 Apr 2004 16:23:01 -0500
Well I won a solid state amp off e-bay, it has what looks like 4 push pull pairs and a possible driver board. It was touted as a plasma generator and is water cooled; the heat sink has fittings for w
/archives//html/Amps/2004-05/msg00007.html (7,359 bytes)

16. [Amps] ENI Plasma RF Amplifier (score: 1)
Author: "Gene Bigham" <>
Date: Thu, 6 May 2004 16:49:57 -0500
As mentioned before I have a 4 board ENI RF amplifier for plasma generator. So far I have taken one board out and drawn a schematic. It is a very simple class C amplifier with feedback from collector
/archives//html/Amps/2004-05/msg00065.html (8,003 bytes)

17. [Amps] Plasma RF amp Boards (score: 1)
Author: "Gene Bigham" <>
Date: Wed, 12 May 2004 08:14:19 -0500
The closest I have come to a match so far is SD1728 or Thompson TH430B. Again, if anyone has further information it would be appreciated. Numbers on the transistors are ST 681033 with either C589C or
/archives//html/Amps/2004-05/msg00118.html (6,691 bytes)

18. [Amps] 6LQ6 6MJ6 Sweep tube conversation (score: 1)
Author: "Gene Bigham" <>
Date: Mon, 28 Jun 2004 20:23:36 -0500
I would like to comment on my experience with a replacement for the 6LQ6 tube. It was a 6MJ6 tube that was substantially heavier all the way around. The glass envelope was 4 times thicker for starter
/archives//html/Amps/2004-06/msg00137.html (7,745 bytes)

19. [Amps] Tube regulators (score: 1)
Author: "Gene Bigham" <>
Date: Thu, 22 Jul 2004 15:35:49 -0500
With all this discussion about tube regulators I have a question. Is there a cheap way to make a direct AC mains supplied power supply for approximately 48 to 50 volts DC for a solid state amplifier
/archives//html/Amps/2004-07/msg00151.html (7,055 bytes)

20. [Amps] Line Isolators for RF feedback (score: 1)
Author: "Gene Bigham" <>
Date: Tue, 27 Jul 2004 07:34:28 -0500
I followed Radio Works recommendations for RF feedback problems. Their line isolators and grounding ideas worked to cure a bad case here. _______________________________________________ Amps mailing
/archives//html/Amps/2004-07/msg00211.html (6,655 bytes)

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