[R-390] Silver Solder

Tue, 25 Jun 2002 10:41:39 -0400

Is silver solder recomennded for any of the joints?

Yes.  I silver solder all the connections in the signal path. 

>I have just re-capped the AF module.  There are so many mechanical 
>grounds in this set!!  What makes it worse is the fact that the chassis is 
>aluminum.  Aluminum oxidizes and makes for poor connections.  Aluminum 
>wiring in a building is an electricians dream--lots of service work.  A special 
>compound is now required for aluminum connections.

I use a mating compound called Dow-3 on critical connections.  Its a bit old 
and I am sure they have a substitute by now but it seems to have worked fine.
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Chuck Rippel, WA4HHG
R390A List Co-Administrator
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1968 Contract Dittmore-Friemuth R390A #38
1967 Contract EAC R390A #2808 with outboard Sherwood SE-3 Sync. Detector
1967 Contract EAC R390A #5295
1967 Contract EAC R390A #5591
1967 Contract EAC R390A #1023

All in regular use as premier Shortwave Broadcast DX Receivers
       -and-
Vintage AM Amateur use
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