[R-390] R-390 (NON A)

[Dan Merz]

Pat,  the thing that comes to mind is that you have the leads to the meter
reversed.  I looked at my meter and this would be easy to do.  I  assume if
you zero the meter at zero then when a signal appears it goes downscale and
off the scale,   and hence you have to zero it toward the high end of the
scale to get signal response the way you described.  My leads are color
coded but I don't know if the color code is universal to all 390's.  But you
could trace the leads with an ohmmeter back to the 6th i.f. tube/agc tube to
see which is which.  The minus side should go to the agc tube,  the plus
side to the 6th i.f. tube. Disconnect the two meter leads and pull the two
tubes and measure from the cathode pin of each tube to the two leads to see
which is which (power off on the set !!) Or just reverse the leads and see
if it works ok then.  Email me if you need more info on which tubes I'm
talking about.  Dan. 

-----Original Message-----
From: r-390-bounces at mailman.qth.net [mailto:r-390-bounces at mailman.qth.net]
On Behalf Of Patrick
Sent: Wednesday, June 01, 2005 3:08 PM
To: r-390 at mailman.qth.net
Subject: [R-390] R-390 (NON A)

Have a r-390 that have just finished working on it, replaced defective PTO,
Crystal calibrator, checked all tubes and replaced some weak ones, then
aligned it. It work great, But the carrier lever meter works backwards, the
stronger the signal, the less the indication on the meter. Have replaced the
meter and there is no change.
Can someone put me on the right track for this problem?

Thanks in advance for any and all suggestions,

Pat
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