Tip #5: Improving transmit audio crispness

This one's taken from Rich Measures' (AG6K - SK) page, linked in the References section. The RF Bypass capacitor at the Mic Amp collector needs to be reduced, as the stock value also attenuates speech frequencies.

Applicable to both 530 and 830 series. Capacitor is identified as C53 in the 530 (adjacent to Q11) while it's C106 (adjacent to Q19) in the 830. Stock part is a .015uF mylar; I replaced it with a .0012uF of the same type and working voltage. I'll edit this section with a picture of the '830's circuit changes when I have one on the bench.

Mic-Amp-Changes.jpg