[R-390] RF Deck, Module Washing (dishwasher)

[Kurt]

----- Original Message ----- 
From: "Tisha Hayes" <tisha.hayes at gmail.com>
To: <r-390 at mailman.qth.net>
Sent: Thursday, March 24, 2011 12:33 PM
Subject: [R-390] RF Deck, Module Washing (dishwasher)


> While reviewing the latest draft of the R-390A inspection process I found 
> a
> few references to cleaning the RF deck in a dishwasher (Page 9, Section 4,
> activities 8,9). This brings up an interesting point for discussion and I
> wanted to share with the reflector on my experience with cleaning a radio 
> in
> the dishwasher.

Tisha and All:

I have washed several 390A modules in the dish washer with good results. 
Most have been quite dirty. I use the delicate/crystal cycle with a reduced 
amount of powdered soap and heat dry.  After the dishwasher I blow off the 
excess water with canned air and place it in the oven at about 150 degrees 
( the lowest setting) for about three hours or so. Please note that I have a 
VERY understanding wife. I learned to blow off the excess water rather than 
wiping the hard way. On one module the lettering started to come off while 
it was still wet but not when it was dry.

I have also  used the same method with Collins receivers with good results. 
I have not had anything turn black.  I do remove tubes, crystals, pto's, etc 
before washing. I have not tried this with lesser brands of radios or 
anything from Japan. This method is not for everyone and I don't do it on 
every radio.

Regards,

Kurt,  KU7RT