[AMRadio] Suggestions for restoring a DX-100

[Jordan Arndt]

I've seen a few AR-88's c.1944 with both electrically and physically leaky
bathtubs... usually around the seals, and occasionally around the soldered seem
also... 73 de Jordan...

George Pritchard wrote:

> 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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George Pritchard wrote:

> 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
>
> _______________________________________________
> AMRadio mailing list
> AMRadio at mailman.qth.net
> http://mailman.qth.net/mailman/listinfo/amradio
>
> _______________________________________________
> AMRadio mailing list
> AMRadio at mailman.qth.net
> http://mailman.qth.net/mailman/listinfo/amradio