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1. [Amps] Alpha 87a Quality (score: 1): Author: "john starr001" <jstarr001@hotmail.com>; Date: Sat, 30 Dec 2006 09:16:40 -0500; Are there any significant differences in the quality of the 87a with ETO on the front panel circa 1993 versus later 87a with Alpha Power on the front panel ? I know there were updates in PIN diodes a; /archives//html/Amps/2006-12/msg00227.html (6,754 bytes)
2. [Amps] Alpha 87a Quality (score: 1): Author: "john starr001" <jstarr001@hotmail.com>; Date: Sat, 30 Dec 2006 13:30:34 -0500; Are there any significant differences in the quality of the 87a with ETO on the front panel circa 1993 versus later 87a with Alpha Power on the front panel ? I know there were updates in PIN diodes a; /archives//html/Amps/2006-12/msg00233.html (6,976 bytes)
3. [Amps] (no subject) (score: 1): Author: john starr001 <jstarr001@hotmail.com>; Date: Fri, 29 Mar 2013 11:11:52 -0400; I have an Alpha 87a and would like to replace with 20 year old NOS 3CX800A7 pair. These have never been used. I would like to getter the tubes by running them for 1-2 days but I have no setup other t; /archives//html/Amps/2013-03/msg00361.html (7,308 bytes)
4. [Amps] Alpha 87A - Gettering NOS 3CX800A7's (score: 1): Author: john starr001 <jstarr001@hotmail.com>; Date: Fri, 29 Mar 2013 11:12:51 -0400; I have an Alpha 87a and would like to replace with 20 year old NOS 3CX800A7 pair. These have never been used. I would like to getter the tubes by running them for 1-2 days but I have no setup other t; /archives//html/Amps/2013-03/msg00362.html (7,089 bytes)
5. [Amps] Basic Question Finding Passive Component Up in Smoke (score: 1): Author: john starr001 <jstarr001@hotmail.com>; Date: Tue, 9 Apr 2013 23:41:32 -0400; I am a beginner learning amplifier basics and decided to build a simple 6146 class C final CW rig with a 6CL6 driven crystal oscillator much like the Eico 720 or Globe Scout. The power supply is a fu; /archives//html/Amps/2013-04/msg00045.html (7,906 bytes)
6. Re: [Amps] Basic Question Finding Passive Component Up in Smoke (score: 1): Author: john starr001 <jstarr001@hotmail.com>; Date: Wed, 10 Apr 2013 00:17:53 -0400; I shorted it right at the B+ and the supply caps, bleeders, etc are not near the point of the smoke puff which was around the tube sockets. I guess I should power it up, use a lighbulb current limite; /archives//html/Amps/2013-04/msg00048.html (10,534 bytes)
7. [Amps] Electrolytic Substitutions (score: 1): Author: john starr001 <jstarr001@hotmail.com>; Date: Thu, 16 Jan 2014 22:47:16 -0500; I am repairing an Alpha 87A and need 7 HV filter caps (350uF @ 450v) screw terminal. The Alpha people spec for a Cornell Dubilier part (CGS series) that costs $40-50 each at various sources. On the o; /archives//html/Amps/2014-01/msg00081.html (7,181 bytes)
8. [Amps] Cadmium Plating (score: 1): Author: john starr001 <jstarr001@hotmail.com>; Date: Sun, 26 Jan 2014 00:34:45 -0500; I am restoring a Collins exciter and the slug rack mounting plates have terrible corrosion. These are steel with cadmium plated and yellow chromate finish. I have tried many local plating companies a; /archives//html/Amps/2014-01/msg00248.html (6,586 bytes)

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