On 2008-10-21 20:05:30 -0600, "Gizmofiddler" said:

This is the power supply I built for a Coronado Model 650A. It should work
for any farm radio needing 90V and 2V battery supplies. The transformer came
from an old Heathkit GR-64 shortwave radio that was parted out.
~Tom


image

Better flip D1 around. You're likely to have some caps exploading or
other fireworks if you wire exactly as shown.

You will also not get full isolation from the A / B supplies if that
was a desired feature, judging by your power transformer. You need a
separate winding for the A supply.

Joe