[R-390] Brought Home a R-390 Today (along With a Viking I)

[Paul Anderson]

On Fri, Nov 6, 2009 at 6:29 PM, sigmapert <sigmapert at gmx.de> wrote:
>
>
>> ......  Pull the plugs for each module until the
>> short goes away.  Then ....
>
> In the R-390A this will work and you can locate the faulty module.
> This is not possible in the R-390 NON A. If you operate the R-390 when
> modules are unplugged it can destroy your radio.

You want to use a meter to check resistance from B+ to ground.  You
have to do that with the radio off.

You are correct about hurting the radio with the radio powered on ...
B+ can go very high if operated while the VR tubes are disconnected.

Paul