[R-390] Diagnostic Help Needed

[Joe Foley]

Download the Y2K manual and study that FIRST.

Check the antenna relay for proper operation.

Clean the whole radio, look for problems while doing
that.  Make sure all tubes work, look for problems
with the sockets.  Check all the plugs, look for
problems there, too.  Check to see that the jumpers on
the terminal strips on the back panel are in their
proper places.  Check that all knobs do the mechanical
function they are supposed to do.  It could be that
the BANDSWITCH is in the narrowest position and the
clamp is loose.  Or some other such thing.  Check the
drive train on the KC CHANGE knob to the PTO.

That's a good start, do keep us posted,

Joe

--- Carole White-Connor <carolew at bellatlantic.net>
wrote:

> 
> I powered up my new R-390A project tonight and the
> news isn't good. There is
> static from the speaker but no stations. When I plug
> the antenna into either
> of the inputs, there is no change in the static. The
> only place I seem to
> get a station is around 780 khz but it's very
> garbled. I get nothing at 1250
> khz, which is an AM station about a mile from my
> house.
> 
> Before powering it up, I replaced four missing
> 5814As with 12AU7s. I also
> replaced the troublesome caps in the IF deck (as per
> Chuck's page).
> 
> I need some step-by-step instructions to diagnose
> the problem. The test
> equipment I have is a VTVM and a signal generator.
> 
> Any help would be great appreciated.
> 
> 
> Joe Connor
> 
>
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