I've just started building a K1 with all options. I'm considering the following mods during this initial build:

1 - "Linearize" the tuning pot with a 100K resistor - this appears to already be incorporated as shown on the schematic.

2 - QSK thump - adding a 220 ohm resistor and 22uf cap at Q1.

3 - AGC - decrease C31 to 0.47 uf

Others to consider?

4 - What is the equivalent point to the K2's 8R line for connecting the external amp keying circuit?

Advice appreciated.

73, Steve WB6RSE

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