wire antenna for AM, SW and helpful to FM. It is best to use an FM
dipole antenna. The type from Radio Shack. There is no
internal FM antenna.
I tested the PU (Pick Up)
input. It worked. However, with an AC powered tape deck and CD
player, that is plugged into the wall, created tremendous Hum. This
is do to the Hot Chassis architecture of the Autotransformer B+ step up transformer.
looks like some one put something in series with the speaker.
RF bypass cap failed spectacularly during first bench testing. No
caps were replaced up to this time. I pre power most chassis to see if
they receive at all.
New 1N4007 diode replacing the selenium diode, 150 ohm 1w voltage dropper
resistor and one of two new electrolytic capacitors.
A shielded .01 uf coupling cap feeds the volume control. I pealed the
paper back and found a simple foil shield.
used some aluminum sticky duct tape to fabricate a shielded coupling
shrink to seal it up. And it works great.
missing foam to keep the dial glass from vibrating on the cabinet.
little bit of non skid foam for throw rugs.
We do not want our radio to buzz
and rattle like a booming urban street vehicle's license plate or
any loose body part.