[Heathkit] cleaning wafer switchs

[WQ9E at btsnetworks.net]

I restored a SX-62 that was so soaked with the stuff that it killed the HFO on the two VHF bands.  I had to give it several cleanings with some spray designed to clean electric motor commutators in order to get it to work.  A little of the stuff may do some good but a lot does a whole lot of harm.

The only thing worse I can think of was described in a Radio News story.  A hot shot repairman was trying to show off to a repairman from another shop and was demonstrating his skill by quickly diagnosing a dirty band switch in a complex all wave receiver that needed cleaning.  He explained this out loud while grabbing a can of cleaner and liberally spraying the switch.  He suddenly stopped and sniffed the air and realized he had just soaked the multi-section switch with a can of anti-corona insulating varnish.

Rodger WQ9E


-------- Original Message --------
> From: "Carl" <km1h at jeremy.mv.com>
> Sent: Saturday, December 03, 2011 7:12 PM
> To: heathkit at mailman.qth.net>, <yash at aol.com
> Subject: Re: [Heathkit] cleaning wafer switchs
> 
> I call that crap DeWrex-It
> 
> Try Q-Tips and 99.8% isipropyl alcohol or whatever the lab grade number is.
> 
> If there is no plastic involved I use the cheapest fast drying disk brake 
> spray cleaner at the box stores. Give the wafers quick blasts only and redo 
> as needed.
> 
> Carl
> KM1H
> 
> 
> 
> 
> ----- Original Message ----- 
> From: <yash at aol.com>
> To: <heathkit at mailman.qth.net>
> Sent: Saturday, December 03, 2011 3:58 PM
> Subject: [Heathkit] cleaning wafer switchs
> 
> 
> >A friend brought over a sb-101 ,acting funny. Pulled the case and looked at 
> >all the band switch's, any rotary switch has been cleaned with something 
> >and all the wafers are wet looking. I found out he slopped dexoit on all 
> >the wafers. Is there a way to clean the switch's and wafers with something 
> >to get the excess cleaner, deoxit, off of everything?
> > thanks
> > dale wt4t
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