From: "VE3AX" 
Subject: Re: [drakelist] Filter Cap on Drake R4A


Peter:

In addition to Herbert's excellent advice, check out the new additions to
WB4HFN's web site and see the post by AL Parker, W8UT, here on replacing
Drake rx electrolytics.

73

Peter
VE3AX

----- Original Message -----
From: "Peter Hoon" 
To: 
Sent: Wednesday, March 17, 2004 10:37 PM
Subject: [drakelist] Filter Cap on Drake R4A


>
> R4A: It appears that one or more sections of the Sangamo power supply
filter
> cap are defective, since I measure 5.2 volts p - p with a scope at the
> junction of diodes D4 and D5 (156 VDC).  And my power transformer gets
very
> hot.
>
> The cap is in a single aluminum Sangamo chassis mount with:
> 100 MFD 200 VDC
> 100 MFD 200 VDC
> 100 MFD 200 VDC
> 20 MFD 20 VDC
>
> 1)  Anyone have a spare from an R4A they are parting out?
>
> 2)  Suggestions for a source for this filter cap from others who have gone
> before me.
>
> 3)  Have improvisors found discrete caps from a source (pse recommend
one),
> left the chassis mount unit alone, and mounted these discrete caps under
the
> chassis?
>
> 4) Has anyone actually drilled out this filter cap shell, and mounted
> discrete components inside?
>
> Any other ideas or comments appreciated.
>
> Peter, VE1CHS
>
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