[Amps] Drake L4-B Power supply caps

[R.Measures]

On May 25, 2004, at 7:11 AM, Partain, Chuck wrote:

>
> retrofitting an Drake L4-B and found the PS caps are popped.
>
> THey are 200ufd, 400v electrolytic.
>
> Looking to see if anyone has EIGHT available. 220 @450 allover the web=20=

> for 5$  but not
> sure of quality??

=F0  Chuck --- If you want quality, /Matsushita/Panasonic 105=BCC 450v=20=

electrolytics have it.  Digi-key carries them.  Unfortunately, they are=20=

not cheap.

> also I can find smaller, 450uf 450v ones I used in my
> Home  brew amp, what will be the outcome of replacing the origional
> caps with HIGHER capacitance values ?? going from 8-200uf to =
8-450uf's?

=F0  More C will provide little noticeable improvement.   However, more =
C=20
means more stored energy to absorb during a glitch, so the glitch-R=20
should have a higher J capacity with higher C.  For 450uF caps in a=20
Drake, I would go with 2, 10=BD, 10W glass-coated resistors in series,=20=

spaced a quarter inch above the chassis..

cheers

> of course i know that its a higher total capacitance, but what can=20
> occur if I
> do this? Both GOOD and BAD??
>
>
> Ka1mwp
>
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
>
Richard L. Measures, AG6K, 805.386.3734.  www.somis.org