Jeff: to me the agc action is too fast - did a web search and found this from AM window web site (excerpt) Second, listening to CW or SSB was really hard on the ear, as signals were quite distorted except when the manual RF gain control was turned way down. A look at the schematic told the story: there was probably way too much IF injection on the grid of V8, the 6BE6 oscillator/detector, and that resulted in significant audio distortion. The fixes for both these deficiencies turned out to be relatively simple. To improve AGC action a 0.56 cap was installed from pin 7 of V9 (grid of the S-meter amplifier) to ground to smooth the S-meter movement and a second 0.56 cap was installed from the AGC bus to ground at pin 3 of the accessory socket. The product detector distortion was resolved with the addition of a 100 pf cap from pin 7 of V8 to ground, thus significantly reducing the IF injection level.