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Re: [CQ-Contest] Modify AL-1200 HV Power Supply by adding 2 capacitors &

To: reflector cq-contest <CQ-Contest@Contesting.COM>
Subject: Re: [CQ-Contest] Modify AL-1200 HV Power Supply by adding 2 capacitors & bleeder resistors
From: Tony Brock-Fisher via CQ-Contest <cq-contest@contesting.com>
Reply-to: Tony Brock-Fisher <barockteer@aol.com>
Date: Fri, 13 Sep 2019 10:23:56 -0400
List-post: <mailto:cq-contest@contesting.com>
I did a similar mod on my AL-1200. If you read the original QST review you will note that some of the early ones had incorrectly wound HV transformers - mine must have been one of those, as it never got over 3200V. I added one filter cap and bleeder to bump the rating of the capacitor bank to 9x450=4050V, then changed the primary tap on the transformer. I now get 3600V on the HV. This gets the output and gain up where it should be.
It has run this way for a decade.

-Tony, K1KP

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