[R-390] Cleaning modules

[Barry Williams]

I used it for cleaning the chassis which had a lot of grime that other 
cleaners wouldn't clean up. I didn't do wire bundles, etc. The Fisher 
came without a cabinet, so the chassis is exposed with lettering for 
tubes, etc. It still took a long time to get cleaned up.


Barry

> I wonder about the use of ammonia to clean modules containing copper wiring,
> etc.  Ammonia (ammonium hydroxide) will react with copper to form an ammonia
> copper complex that can be identified by a dark blue color.  As long as it's
> completely removed rinsing nothing should be harmed.  Noting Roy Morgan's
> comments about Simple Green and aluminum, a similar condition might exist
> with ammonia and copper.
>
> David
> KC2JD/4
>
>
> Ammonia works well too. I found it to work better when restoring an old
> Fisher 800B receiver unit.
>
>
> Barry
>
>
>