On Aug 24, 4:11*am, "Pete KE9OA" wrote:
The built in AC power supply on this radio has quite a bit of switching
noise. Each of the diodes are bypassed, but they neglected to bypass the
secondary of the power transformer.
Place a 1uF ceramic cap across the secondary (input to the diode rectifiers)
and this will eliminate that "light dimmer" type of buzz on the MW band.

Pete

Nice work Pete - that mains connection sure is a pest on MW.
Wish I lived near you to send it for that upgrade (unfortunately if I
try it I will ruin the radio and burn the house down)

JP