Absolutely no originality is claimed for the design which is a rip-
I have had the mains transformer for close to 40 years and I think it came from TV
Valves (or tubes) actually lend themselves to simple point-
The bridge rectifier consists of four 1N4007 diodes. There was no room for a bulky
smoothing choke so I simply used a couple of 1K resistors in parallel between two
47uF capacitors. The entire circuit only draws 50mA maximum. Listening to the modulation
on my RA3701, the audio has the typical limited bandwidth, no-
Note the ancient variable resistor with the original R1155 knob!