[R-390] Silver solder

[blw]

>  DeoxIT the plug-in
> coil contacts and the tripod-like clip under the adjustable capacitors.
> 
> Do the above once every half century!  :-)
> 
> 73 de Norman KG4SWM



Do the tube pins too, and work them in and out of the tube socket a few
times. Do all plugs. I did the pins on the crystal too.  Did the antenna
relay.  A tiny bit of DeOxit went in the balanced antenna input plug. The
change in the radio was very noticable.



Barry