IC37 AUDIO FIX FOR IC-27, 37, 47 Ed Richley KD9KZ fo Naples, FL has a very good article on improving the audio treble and output power for these popular mobile radios. Capacitor C-67, from .01 to .00 uf and Resistor R-31, from 150 ohm to 270 ohm, are the components that are changed in the IC-27A two meter model and some comparison to the 220 and 440 schematic should show if these are the same parts in all three rigs. So for more details see Ham Radio Page 61 for Feb. 1986 and improve the one complaint about this model. I will do mine when time allows. RELAYED BY...N0KGX...GENE