[R-390] Collins R-390A, new owner

[Barry]

> Hi Guys:
>
> I'm new to the list, and just received a R-390a. It is in
> original condition/unrestored but apparently working. Someday
> I'd like to do a through restoration but don't have the time
> right now, though I'd like to start using it.
>
> 1) Is there anything I should immediately check? Things that
> could do damage or harm if they fail and are likely to?
> Perhaps the power supply filter caps, fuses, power cord?
>
> 2) Is there anything I could do in an evening, to improve
> it's performance (e.g. run all the tubes thru a tube tester)?
> I have access to good test gear (HP), and am reasonably
> competent.
>
> Suggestions and advice appreciated,
>
> Sincerely
> Blair VE3CZY

Blair,

The filter caps are good to check.  If they're not getting warm and the set
isn't producing AC hum, then they should be fine.

There is a blocking capacitor in the IF deck that, if it goes, will destroy
whatever IF filter is currently chosen.  It is pretty easy to replace as the
IF deck comes out pretty easily.  You just have to get the BFO aligned when
you put it back in, but that's pretty easy too.

Perhaps others can suggest some other common failure points that might be
critical.

Glad you joined the group!

73,

Barry - N4BUQ