[R-390] R-390A deaf below 600 KC?

[Paul Staupe]

I picked up an otherwise beautiful Amelco from a local yesterday but
noticed three  things that were strange. First was that it didn’t like my
Beverages on the twinax input but performed normally with a 160m
vertical….  Can the impedance difference be that much of a issue?  My EAC
doesn’t care between either antenna.

Secondly, and more concerning is that below 600kc there literally is no
signal.  I primarily use my EAC for BCB DXing and I need to figure this out
for sure.

Thirdly, although the 10 turn pot is installed, the carrier level meter is
very insensitive and only moves  1/8 of the scale between the loudest and
lowest signals.

So I’ve got a pretty looking radio but there is some work to be done. Any
suggestions?

Best regards,

Paul