[R-390] Current thoughts on washing

[Cecil]

I'm usually not too wild about submerging any part that has coils or inductors in solutions.  I prefer to clean those parts by hand in a gentle manner. The remaining module parts I don't worry too much about.  Dunk them, scrub them, hose them off whatever.  I would be concerned about pots and switches so I continue to clean the bare chassis by hand with minimal solution and water to those parts...same for trimmer caps but maybe to a lesser degree...

I still use 409 for scrubbing with a tooth brush and lots of rinse.  I've had no problems with my tap water...it's really soft...little mineral deposits.  I sun dry and then put in an A/C environment for a week or more before Deoxit work and reassembly.

Cecil
K5DL

Sent from my iPad

On Oct 8, 2013, at 1:00 PM, Tom Frobase <tfrobase at gmail.com> wrote:

> I was fortunate to pick up a Motorola R-390 at the Belton Hamfest last weekend.  That is the good news the bad news is that the radio looks as if it was stored in a barn.  Mud dabbers nests in the coax sockets and lots of dirt, good news is no mouse droppings or blood hi hi !
> 
> Although I have restored numerous r-390 and r-390a's, I have never totally immersed anything but the  chassis plates and the gear assembly after removal.  I have a large ultrasonic cleaner that I use to clean the gears.  I usually clean the chassis with ajax or other mild cleanser and of course the normal paint and powder coat refinish on the knobs and other parts
> 
> So if I were to immerse the modules would I use a mild dish washing detergent in the ultrasonic cleaner and use DI water in the ultrasonic to rinse?   What about the IF covers and BFO, do I remove the covers to keep from trapping moisture,  RF cans are removable they can be cleaned otherwise.  
> 
> I would be tempted to try it with this radio, I know this has been covered a million times before but I would like to hear the current thoughts ... tom, N3LLL
> 
> 
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