According to LTspice... (Famous last words?)
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Here's one potential solution.? It adjusts RE on the Q6 amp from 1K + the 47 Ohm swamping resistor, to a 270 Ohm resistor.? C62 is deleted.? A buffer from page 2 of Skelton's "Building a Transceiver" is AC coupled.
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The 50 mV peak input signal is converted to an output that varies between 83.5 mV at 2KHz to 152.2 mV at 20 KHz.
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I have no idea what C4 does.? LTspice doesn't seem to care about it one way or the other.
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I'll continue to experiment with buffers and see if I can figure out simpler options, and options that can be DC coupled.
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73, Andy
KG5RKP/MM
Getting bounced by wakes from weekend powerboats on the West Florida Intracoastal Waterway
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