SB-200 arrives

[Don Cunningham]

Amen, Brad!!
I totally agree about the "Blue Shower" after the two days I spent prying it
off the switches in a nice Drake receiver.  I use only DeOxit now, and use
the "pump spray" bottle.  The aerosol can easily swell the phenolic on the
rotary switches if you use too much.  I put the DeOxit in a syringe and put
only what is needed, directly on the contact surface (or shoot into pots)
and find that works very well.
73,
Don, WB5HAK
-----Original Message-----
From: Bradley S. Stone <nb9m at reliable-net.net>
To: HEATH at LISTSERV.TEMPE.GOV <HEATH at LISTSERV.TEMPE.GOV>
Date: Wednesday, October 06, 1999 5:47 PM
Subject: Re: SB-200 arrives


>Very true, but please don't use Blue Shower - or similar cleaners!  25
years
>of troubleshooting here will bear out the fact that Blue Shower hardens
into
>a semi-conductive mess after a few years.  A clear, evaporative,
>non-lubricating cleaner (available at Radio Shack) is a good bet.
>Information on DeOxit is available on the HCA web site under "Collectors
>Resources/Chemicals" (www.hallicrafters.org)  Sometimes lubricating
>additives are slightly conductive.  Also, remember that all of these
aerosol
>cleaners are very flammable!  Wait for the fumes to clear before firing it
>back up.
>
>Best of Luck,
>Brad, NB9M
>
>-----Original Message-----
>From: John Campbell <r3campbell at HOTMAIL.COM>
>To: HEATH at LISTSERV.TEMPE.GOV <HEATH at LISTSERV.TEMPE.GOV>
>Date: Wednesday, October 06, 1999 7:41 AM
>Subject: Re: SB-200 arrives
>
>
>>Hi Ron:
>>   I'm not sure what material the switch contacts are made of, but the
>>tarnish you describe is not at all unusual. I have had good success using
a
>>commercial product called "blue shower" to clean these contacts. You can
>>also use a product called "De-Oxid" (sp???). Lacking either of these
>>products, you can also use plain old rubbing alcohol. There is also a
tuner
>>cleaner/degreaser available from Radio Shack which is similar to the "Blue
>>Shower" and works well.
>>Hope this is helpful.........73...John <<w8jnc>>
>>
>>
>>
>>>From: Ron Emerson Kb9E <Rpemers at AOL.COM>
>>>Reply-To: Rpemers at AOL.COM
>>>To: HEATH at LISTSERV.TEMPE.GOV
>>>Subject: SB-200 arrives
>>>Date: Tue, 5 Oct 1999 21:58:57 EDT
>>>
>>>Ok..I'm all fired up now!  UPS delivered my SB-200 today and it looks to
>be
>>>in great shape.  It was packed very well and the box didn't look beat up
>at
>>>all.  I spent about 2 hours with the chassis out of the cabinet, cleaning
>>>the
>>>dust out.  Now the inside looks really good and a nice neat job of
>>>assembly.
>>>I only noticed one thing that even concerned me(so far)and that was the
>>>band
>>>select switch.  Looking at the switch from the rear it looks to be
>>>tarnished?
>>>  Did they use silver plated metal on the contact lugs and plate(?)
>>>assembly?
>>>Its not corrosion or rust but looks like the same tarnish a silver plated
>>>musical instrument would have after sitting for while.  If so, any
>>>recommendations on how to clean it would help or maybe it's supposed to
>>>look
>>>like that..thats why I'm asking here.
>>>
>>>I should be able to get the Harbach Soft-Key mod in this Friday and then
>>>hopefully put the amp on the air!   Thanks to all of you who have been so
>>>helpful in answering my questions and offering more.
>>>
>>>Ron
>>>KB9E
>>>
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