[R-390] need help

[Joe Foley]

Oh, no!

Not another Scott!  Line up over there with the
Barrys.

Well, Scott,

Your problem is obvious to the assembled multitude,
even I have dealt with the subject switch.  You
will/should probably take off the front panel, it's
not too tough to do.

Set the radio on two 2"X4" blocks so that the side
panels rest on the blocks but the front panel is free
to drop to the bench top.  Then remove the two big
knobs and their bushing retaining nuts, remove the BFO
knob, the BANDSWITCH knob, the ANT TRIM knob, and the
15 Phillips-head screws that hold the panel on.  Then
you can just lay the front panel on the bench in front
of you and gain access to the microswitch that is
causing the problem. It is attached to the FUNCTION
switch.

The clicking relay you hear is the antenna relay which
is operated when setting the FUNCTION switch to STAND
BY, the radio should NOT be left in the STAND BY
position ever, the B+ raises to a possibly damaging
level.

While you're in there put some oil on the transmission
gears, the knob bushings, and anything else that looks
like it moves, or moved at one time.

Then clean, clean, clean, do a very careful visual
inspection of everything, smell for trouble spots,
look for smoke trails,  oil anything that moves, and
clean, clean, clean.

Ya' see, this will be the best way to get familiar
with the beast.  Just look at that gear train!  Have
you ever seen anything like it?  Smart guys built
that!

Joe


--- Scott Bauer <odyslim@comcast.net> wrote:
>  Hi Gang,
> 
>  I wonder if someone can point me in the right
> direction. First I 
> will tell you that I do not have much experience
> with these rigs.
>  
>  The lamp in my 390A stays on even when the power is
> turned
> off. It seems logical to check out the power switch
> with an ohm 
> meter. I wonder if someone has had this problem
> before? I would
> like to aviod taking the front panel off if
> possible. I do hear a relay
> clicking when I turn it on and off. 
> 
>  I do have a  manual somewhere but cant find it at
> the moment. I 
> just totally re-modeled my radio room and cant find
> anything right
> now. 
> 
>  Thanks for any advise.  Scott ( another Scott )
> 
> _______________________________________________
> R-390 mailing list
> R-390@mailman.qth.net
> http://mailman.qth.net/mailman/listinfo/r-390


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