[R-390] R-390A - lan odd fault.

[pete williams]

 Hi  group... just a  recent anecdote which may be of interest...
After installing a relatively new  looking( ? ) RF  module in a
rejuvenation  project.,I had a marked  drop in  gain/sensitivity
during  alinement on the 4  - 8 MC range. The  input  xfmr T 204
appeared to tune very  broadly and most sluggish. Figuring bad
contacts or  capacitor   I removed it,  slipped off the  cover  and
was  amazed to  find the antenna  coil  primary winding  at the
bottom end  was  a tangled mess ---- not only  did it LOOK burnt , but
the former  at the lower  end completely missing ! carbonised  I
expect.
 Conjecture ..... the  module  was of  ex Navy  stock labelled
repairable.. .. maybe HT through the balanced  antenna  or a  dose of
high power RF. ?...The rest of the  rx  I  don't have to  check the
relay.  It is of interest to note that the band covers  marine
freqs... No  aspersions  intended . !
A new T 204 fixed that one ... there's a moral before  using surplus
stuff whether or not  marked  "repairable" !
 Cheers
 Pete

 P.S --- to the  guys  who fixed a  reply on my  xtal mnfr  problem-- 
individual thanks   to  come .

Pete D . Williams
METUNG 3904
Australia
jupete at bigpond.net.au