[Boatanchors] Replacement Filter Capacitors for Drake L-75 Linear Amplifier

[D C _Mac_ Macdonald]

I have no real idea!  Dual safety interlocks preclude operation of any kind with case cover removed.

Drake states nominal output of ~2900 VDC at no load, and ~2600 VDC @ 450 mA full load.  I'm presuming 8 caps rated at 450V DC.  Harbach uses 220 uFd and 450 VDC for their L-4 and L-7 amp p.s. kits but those are mounted vertically with screw terminals at one end.  The L-75 uses 8 caps mounted flat on a vertically mounted circuit board.


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* 73 - Mac, K2GKK/5 *
* (Since 30 Nov 53) *
* Oklahoma City, OK *
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________________________________
From: Rob Atkinson <ranchorobbo at gmail.com>
Sent: Friday, March 24, 2017 11:45
To: D C _Mac_ Macdonald
Cc: boatanchors at mailman.qth.net
Subject: Re: [Boatanchors] Replacement Filter Capacitors for Drake L-75 Linear Amplifier

What's the RMS voltage at the secondary of the plate supply transformer?

Rob
K5UJ

On Fri, Mar 24, 2017 at 11:41 AM, D C _Mac_ Macdonald <k2gkk at hotmail.com> wrote:
> The manual I have for this amplifier does not have a parts list.  I have not been able to discern values (capacitance and voltage) from the poor quality schematic that I have.
>
>
> I would greatly appreciate any info regarding the values and possible sources for replacement capacitors.  These are radial lead (out the ends) capacitors.
>
>
> Harbach has stated he has no replacement board/kit for this amp due to very low original production numbers.
>
>