[R-390] Painting Notes and Parts

[Scott, Barry (Clyde B)]

Wetsanding seems to be the fastest method as the original paint is very
difficult to remove.  I think it can be removed with commercial hot
stripping techniques, but the stuff at the local hardware store is pretty
ineffective.  I have had success removing the lettering with aircraft
aluminum stripper and a very stiff nylon brush.

Interesting that Leeds Electronics has replacement knobs for General Radio
gear too.

Barry(III) - N4BUQ


1. Jeez, that paint that they used on the R-390 is tough to remove. I let
the knobs soak for a WEEK in Zip-Strip, and I still had to sand them. I
spread the stripper on the panel with a plastic scraper (which then melted
into yellow goo) and still has to scrub it for an hour - and that was just
the gray bits! The white lettering refuses to go! The bare alodined panel
sure looks nice though. If it wasn't for the ugly scratches, I'd just
clear coat it. I'd impress my friends with my 'gold plated' radio.

<snip>

3. Leeds Electronics (www.leedselect.com) seems to be selling a Dejur
100 microamp meter ($6) in the 1.75" square case most desired for
replacements. They also have IERC shields in stock too. If they are
reasonable in price, don't buy too many, I need some!


Dave Goncalves