[Guest]

Jonathan - welcome! Another free schematic may be found here.

For the early Model 20 with only one or two trimmers:
http://www.philcoradio.com/tech/images/20a.jpg

For the common Model 20 with three trimmers on the tuning condenser gang:
http://www.philcoradio.com/tech/images/20b.jpg

The 20 could be modified to add AVC, but it would frankly be more trouble than it would be worth - removing coil ends from ground, adding terminals to coil forms, etc. Not to mention detracting from the originality of the circuit.

Hi Ron and Terry,

Thanks for your feedback. I'd try to see what I can do to make the radio performs a bit better.

I guess the Model 20 probably performs similar to those early 1930 radios or 1920 radio such as Atwater kent Breadboard or Model 20.

Jonathan.