[R-390] What is on the 390 chassis anyway

[Craig Heaton]

Grayson,

"It comes off quite easy" Could it be nicotine??? I don't think the yellow
coating Bob is speaking of comes off easy.

If it is nicotine, elbow grease and the cleaner of your choice. Mr Yuk frown
here!

Craig,	

-----Original Message-----
From: R-390 [mailto:r-390-bounces at mailman.qth.net] On Behalf Of Bob Camp
Sent: Saturday, October 11, 2014 1:14 PM
To: Grayson Evans
Cc: R390A
Subject: Re: [R-390] What is on the 390 chassis anyway

Hi

The yellowish coating on the aluminum goes by a number of trade names. You
can buy a bottle of this or that and spread it on. The problem is that to
really get it to stick you need to do a proper strip (as in chemical etch)
of the entire piece and then re-coat the entire thing. By far the best way
to do that is to take it over to a local plating shop and let them do the
job.

Bob

On Oct 11, 2014, at 4:06 PM, Grayson Evans <wa4gvm at gmail.com> wrote:

> I am in the process of restoring one of my R390A's,  I disassembled it and
disassembled the chassis.  I am trying to clean it up, and get the chassis
back in reasonable shape.  In the process I have to do some scrubbing to get
the dirt, old adhesive labels, and corrosion off the chassis pieces (sides,
back, partitions, etc.), 
> The chassis metal is coated with a light yellow something.  Is this an
anodized coating or something the manufacturer sprays on?  It comes off
quite easy, so I don't think it is an anodized coating.   Is it the same
stuff thats on the solder connections?  
> 
> What would you recommend as the best (or reasonable) way to treat the
metal in areas where the coating is removed?  just covering with a light
machine oil?  Spray it with a clear acrylic?  
> 
> 
> Grayson
> TA2ZGE - Ankara, Turkey
> KJ7UM
> Follow the Hollow-State Design Blog
> hollowstatedesign.tumblr.com
> 
> 
> 
> 
> 
> 
> 
> 
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