This question may have been missed on my last dial cord post. I have done this in the past but cannot remember how.
The radio plays good but as a battery radio the speaker output is tinny in sound. There is no tone control in the radio and I am not experienced enough to know where I can make a capacitor substitution/replacement to get some base tone in the output.
Can someone guide me as to how to achieve some base in the sound output?
The schematic is here at NA.
Thank you,
Mitch
Being a low-power set with a (probably) small, dried-out speaker, this set likely has very little capability of producing decent bass tones. However, you might try replacing audio coupling caps C11 and C12. One or both may have lost capacitance over the years to the point where it can't pass low frequency audio very well. If replacing them doesn't improve things, you might try increasing their value to 0.05 uF or so.
The other possibility would be to install a "high cut" RC filter to knock down some of the shrillness.
You also could try replacing (or slightly enlarging) C13, the audio output transformer's primary bypass capacitor.