[R-390] New Owner

[Tim Shoppa]

Collin (n4tua at aol.com) wrote:

> Has anyone ever seen a case were the bfo pitch and selectivity switch shafts
> were not aligned with the front panel holes? Is there an adjustment to align these?
> When I got mine the bfo pitch would not turn due to alignment. Now that the IF
> chassis is out it turns fine.

There's a certain amount of misalignment between any module and mainframe, but
usually the worst is that it makes turning the knob a little stiff.  Maybe a hard knock
to the chassis (in shipping?) caused things to go out of alignment worse than this.

The "usual suspect" is to remove the knob, loosen the bushing mounting nuts,
wiggle everything into realignment, and retighten.
 
> What are some good or critical things to do before applying power for the first
> time? I have removed the audio, power supply and IF chassis and inspected
> and am doing some clean up now.

Replace the "killer cap", C553 on the IF chassis, with a higher-voltage unit.
Also the electrolytic cans on the AF chassis and C609 on the AF PCB.  Check the fuses
for proper values.  (I've seen 5 Amp fuses in the 1/8A position!  Augh!  I suppose a
penny didn't fit...)
 
Tim.