I am a new owner of a Ramsey FM-100 (the export version, incidentally) and I've heard a lot about "fixes" for this model. I'd like some guidance from the technicians who designed this unit.
1. It has been suggested at http://people.mw.mediaone.net/laser95x/page2.html
that replacing R8 with a higher value will improve the bass response and dynamic range.
2. A review at http://www.geocities.com/Area51/Nebu...100_report.txt
suggests several modifications. I'm mainly interested in:
a. Replacing C13 with a 300pf silver mica to let less PLL "hash" get back into the modulated signal.
b. Adding a 10uf tantalum bypass capacitor to the junction of R8 and R7 to minimize "bass rumbles"
c. Placing a 10k ohm resistor in parallel with a .0022 uf capacitor connected
to (in parallel with or replacing) R34 (and the same for R72) to "brighten" the audio signal
3. The reset fix found at http://www.geocities.com/Area51/Nebu.../fm100-fix.txt
Of course my unit is only used into a dummy load, so as to not violate any FCC rules.