>> greatest improvement you can make is to add a film cap to the 100uf electrolytic cap in the feedback circuit.
Just finished restoring my MC240 and noticed the above comment from 2020. Can you give a couple more details?
-- What value of film cap, and how wired?
-- What's the goal here?
Thanks!
Phil Nelson (philsoldradios)
https://antiqueradio.org/index.html