[Amps] P/S upgrade

[Carl]

Whats the value of the choke?? Old handbooks have all the info on thise 
selections that you will ever need.

Yes a variac is just an added stage of regulation to contend with unless 
it is a monster.

Carl
KM1H



----- Original Message ----- 
From: "Mike Lucas" <w5chr at bellsouth.net>
To: <amps at contesting.com>
Sent: Monday, March 16, 2009 7:59 PM
Subject: [Amps] P/S upgrade


>I have an OLD homebrew supply for a single 4-1000,
> that needs some re-work before using it with an amp.Transformer weighs
> 103lbs, with a 28 lb choke input in the neg lead. Rectifiers are 3 amp
> individual diodes in a bridge configuration.
> Questions are: is 16Mfd enough at 5 Kv and 540mils, if not, how much? 
> And
> why will a variac cause poor regulation?
>
> 73, Mike W5CHR
> Memphis
>
>
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