[R-390] R390A GAIN ADJ and final testing

[Francesco Sartorello]

Hello, everybody!
in accordance with TM 11-856A, para 148 (adjustment of GAIN ADJ
Potentiometer R519) signal generator should be connected to J513 v ia an
MX-1487 Impedance Adapter: is this a simple 50 ohm termination for the
Signal Generator as the CU-406/URM-25F or else?
About overall sensitivity, I have the impression that approximately the same
results can be achieved with both antenna inputs (Balanced and Unbalanced),
with proper setting of the Antenna Trimmer and alignment of the first set of
RF coils is not so dependant from the antenna input used: will someone
comment on this?
What about Electrcal Dummy Load DA-121/U mentioned in Section 5- Final
Testing? Is it, maybe, something like a DA-109/URM-25F with a resistive
partitor to obtain balanced output?
Ciao a tutti!   FSarto