[AMRadio] Suggestions for restoring a DX-100

[George Pritchard]

My friend KH6U has an R-388 (as I do). He said the same thing about the
bath-tubs. Fortunately, I have not yet had that problem, only leaky faucets
in the bath tub, Hi Hi,
George KC

-----Original Message-----
From: amradio-admin at mailman.qth.net
[mailto:amradio-admin at mailman.qth.net]On Behalf Of Bill Smith
Sent: Wednesday, April 03, 2002 5:01 PM
To: amradio at mailman.qth.net
Subject: Re: [AMRadio] Suggestions for restoring a DX-100



----- Original Message -----
From: "George Pritchard" <gpritchard at comtechpst.com>
To: <amradio at mailman.qth.net>
Sent: Wednesday, April 03, 2002 12:16 PM
Subject: RE: [AMRadio] Suggestions for restoring a DX-100


> Reforming caps, or verifying leakage on them is easy if you have one of
> those older 0-400 VDC high voltage variable supplies (heathkits $10 at
> fests). I used it to verify leakage on "New Old Stock" caps and noticed
very
> high leakage, >10 mA at only 100 Volts! I'd leave them at 100 volts until
> leakage dropped to < 1 mA... then go up slowly to 200 volts, and wait
again.
> Repeat the process untill you get to 400 volts on the 450 volt rated caps
> with less than 1 mA current.

A good procedure.  Too bad it didn't help the electrolytics.

>The oils will never fail. BTW... I used the
> Heathkit supply to verify the shorted capacitors in the first place. It
> saves fuses and possible the transformer!!! Good luck.
> George AB2KC

Sorry to say I now find that many, if not most smaller bathtubs (0.01, 0.5
.1 mfd) of the WWII / 50's vintage are now developing leakage.  High voltage
oil caps seem to be holding up (so far).

73 de Bill, AB6MT
billsmith at ispwest.com

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