[R-390] Why is it so ?

[Pete Williams]

​IF  Module  R-390A   prob.
 Preliminary  observations  herewith.
A  supposedly  reconditioned  Module .
Very  distorted   audio;
1.. Diode load  measures -60 (sixty) V  on local  BC  station
2..Tune off- no  signal  diode  load shows -16  V.
3..AGC  terminal measures -3  V   on signal  as  above .
4.. AGC  terminal measures -0.4V no  signal.
Selecting   all   AGC  switch. slow/med/fast  positions  no  change.
RF  gain  at  maximum  and  in  AGC  mode.
Limiter  switch on-  minor  variation  in any of   above conditions.
 No  in depth   forensic  examination as  yet, but  someone  may have been
this   route  before  and   have  heads up  diagnosis for me !
Radio operates  OK on a   different   module. It all seems   rather  odd
 Cheers
Pete VK3IZ