How do you know the tube is good. I had the same problem last week with a 3-500, i.e. intermitency, high input VSWR, full power when it] worked, etc. In my case, an intermitten grid to filament short
Wilson, your point is well taken, it could be you are right and the final is at fault. But before investigating such a significant and expensive problem as an intermittently open or shorted 8877, I w
Author: "Jose E. Ribeiro Sa" <zemurtosa@mail.telepac.pt>
Date: Wed, 5 Oct 2005 18:17:31 -0000
I really don't know if the tube is alright, I don't have a replacement here at hand to test it out. I hope it is as it costs over 800 bucks, Hi ! 73 Jose CT1EEB ______________________________________
Agreed. I would first perform the Funderberg gold-sputtering test to see what's what with the grid. http://www.somis.org/Goldmeltballs.html Richard L. Measures, AG6K, 805.386.3734. www.somis.org ____
Author: "Kenneth D. Grimm, K4XL" <kgrimm@adelphia.net>
Date: Wed, 05 Oct 2005 16:53:54 -0400
My money is still on Aachem. In other words, the relay. Not everyone has a hi-pot tester. Jose already has a new relay. What would Aachem suggest? Buy a hi-pot tester and look for meltballs or sub th
I have a friend who has done the relay mod to his AL1500. He is sending the docs to Jose tonight. 73, Keith NM5G --Original Message-- From: amps-bounces@contesting.com [mailto:amps-bounces@contesting
That is a kindness I'm sure Jose will appreciate Keith. I would still burnish the contacts and check the mechanical alignment on the open frame relay before changing it out for the twin relay update,
Hi-pot testers are easy to make with an old neon sign transformer and a few parts. Trying to trouble shoot a tube type amplifier without a DMM, a HV probe, and a high-pot tester wastes time and possi