Capacitors - In or Out?

[WSHU Engineering]

I agree with others that those old caps should be out of the circuit before
they cause other damage or burst and make quite a mess of things. If you
want to do a authentic looking restoration, open the old cans and remove
their innards, put new caps inside and remount the cans. I have even done
this with old paper caps to keep the original look on vintage receivers.

Paul A. Litwinovich
Director of Engineering
WSHU AM & FM, WSUF-FM
FCC License  PG-GB 039245
"RF IS GOOD FOR YOU"



----- Original Message -----
From: "Alan W. Fremmer" <AWFremmer at AOL.COM>
To: <BOATANCHORS at LISTSERV.TEMPE.GOV>
Sent: Tuesday, August 03, 2004 8:06 PM
Subject: Capacitors - In or Out?


> Gentlemen:
>
> On reading the article in the January 2004 QST, on restoring a DX-100, the
> author Brian Wood, W0DZ, suggests that adding capacitors to those already
in the
> circuit is an option for reducing hum.  He does say that replacing is
better
> than adding but the former requires more effort.  I'm wondering if I can
> reduce the hum in my DX-60A simply but adding new electrolytics across
those
> already there, or will the AC simply find its way into the signal by
taking the
> shortest route.  Please be gentle with me as I'm not an engineer but
simply enjoy
> this hobby and the restoration aspect especially.  Any help will be
greatly
> appreciated.  One last thing, could the hum I'm hearing result from the
close
> proximity of the receiver to the transmitter (the RF gain is way down) and
what
> can I do to overcome this problem short of putting the radio on the air?
> Thanks in advance.  Alan, KB2HEI
>
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