[Hallicrafters] Removal of chassis green oxide

[wa1kbq at aol.com]

It's not an "A" version so this mean you are dealing with clear cad 
rather than yellow cad. If it were disassembled the oxidation would be 
simple to remove with either phosphoric acid or sodium bisulfate and 
then neutralized with water and 409/ammonia. Attempting to clean 
without disassembly means limited use of water and detergents and 
probably means having to accept some compromises.

There is a method that might work after a fashion however it will 
likely not draw many praises from the experienced hands here. In the 
very least you should remove the tubes and other easy parts to get as 
much additional access as possible. Get an assortment of various 
brushes including old tooth brushes and paint brushes but be sure to 
tape over the metal bands to prevent accidentally scratching aluminum 
parts. You will also need a shop vac with a hose and nozzle plugged on 
the blowing side and you will want to work outside on an old card 
table, etc. Put a particle mask on and start brushing and blowing until 
you are satisfied with your results. Next spray some WD-40 on a shop 
cloth and start wiping the chassis down. This will hide most of the 
remaining surface discoloration and return the chassis finish to a 
somewhat better appearance.

Regards, Greg


-----Original Message-----
From: Larry Woodworth <larryw0hxs at yahoo.com>
To: hallicrafters at mailman.qth.net
Sent: Sun, Oct 24, 2010 11:57 pm
Subject: [Hallicrafters] Removal of chassis green oxide


The gifted SX-101 Mk 3 is from long time storage and little use. Before 
testing
for other needs, I want to remove as much of that chassis oxide as is 
practical
without any dis-assembly. Much of the under chassis is so coated with 
the
powdery green stuff that it wipes off but still leaves a heavy tinted
coloration. I hope to find a method for it's removal. Tried alcohol,
peroxide(50%), and plain water using Q-tips.

I wonder if someone has used a better method that works for this 
problem. Thanks

for any suggestions.

Larry Woodworth W0HXS

Marshall Ensor Memorial Museum Manager
Olathe, KS

www.W9BSP-W9UA.org




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