[R-390] R390A- no sigs-4 to 8mc.

[Jim M.]

I seem to recall that I had an RF coil go bad in an R-390a I have here.  It
was one of the front end coils in the Z-201-1 to Z-206-1 range,  The failure
was a cap inside the coil that went bad.  As it turn out these coils
(Z-210-1 to Z-201-6) have B+ on them since the plate of the RF amp V201 is
fed through them.  I isolated the bad coil and replaced it.  (I think Fair
Radio still has replacements).  You can also replace the cap inside the coil
itself if it is bad.  If the radio is completely silent then it may not be
this RF stage however...possibly a bad crystal for that band in the 2nd
crystal osc.  Good luck.

-----Original Message-----
From: wb3fau at att.net [mailto:wb3fau at att.net] 
Sent: Tuesday, February 03, 2009 7:51 PM
To: jmiller1706 at cfl.rr.com; Roger Gibboni; Barry
Cc: r-390 at mailman.qth.net
Subject: Re: [R-390] R390A- no sigs-4 to 8mc.

not meaning to be argumentive, but,  how do you  conclude there is a  bad IF
can if the radio
works on higher and lower freqs OK?  
   i did  change out the set of RF coils for the 4 to 8 mc range,  with  a
set from  another 
receiver.  no help.  
   I think  the band switch is the problem- S203-204-205, but not certain.