[HomeBrew] Re: HomeBrew digest, Vol 4 #71 - 1 msg

Thu, 4 Sep 2003 10:59:35 -0400

Most large capacitors use aluminum plates, silver plated brass was primarily
old military specs such as the APC and similar small size units.
Heck, even the ARC-5 transmitters used aluminum.

In reality you do not want any ferrous metal or any other metal with a high
RF resistance in a capacitor.

Plates are made from aluminum, copper and brass. Oh, to back up a step I
have seen chrome plated brass but that was on some ultra fancy BC band radio
of the 30's.

To clean off accumulated years of gunk the safest method is hot soapy water.
Another method is aluminum wheel cleaner that is non caustic otherwise you
will wind up etching the aluminum.
If the plates already have a dull finish you can use a caustic solution or
even clean in the dishwasher. If the plates have been tumble finished for
that bright shiny look then stay away from anything caustic.

Carl
KM1H

----- Original Message ----- 
From: "Jim or Velma" <[email protected]>
To: <[email protected]>
Sent: Wednesday, September 03, 2003 12:02 AM
Subject: [HomeBrew] Re: HomeBrew digest, Vol 4 #71 - 1 msg

> ** Please do NOT cross-post messages to multiple mailing lists on the
"To:" or "CC:" line of the e-mail message. **
>
> Aluminum parts can be cleaned with Cream of Tartar.  I think you mix it
with
> water and then boil it with the aluminum parts in the bath.  Larger
> capacitor plates would be plated and not made of aluminum.
>
> Jim, W7PUP
> ----- Original Message -----
> From: <[email protected]>
> To: <[email protected]>
> Sent: Tuesday, September 02, 2003 1:05 AM
> Subject: HomeBrew digest, Vol 4 #71 - 1 msg
>
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> > Today's Topics:
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> >    1. Cleaning stuff! ([email protected])
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> > --__--__--
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> > Message: 1
> > Date: Mon, 01 Sep 2003 10:38:03 -0700
> > From: [email protected]
> > To: "'[email protected]'" <[email protected]>
> > Subject: [HomeBrew] Cleaning stuff!
> >
> > Someone told me awhile back that he'd heard of a couple of home
> > ingrediences that you could mix together, that when an old dirty
> > variable capacitor was dropped in, it would come out sparkling clean in
> > a couple of hours.  The guy didn't remember what they were.  Anyone out
> > there have any idea? Thanks, Ron (with a very dirty broadcast capacitor)
> >
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