Quote:
Originally Posted by Ian - G4JQT
Q1 FET is now BF256 as it has more predictable performance than the original 2N3819. Note the pinouts are different, although David's layout takes this into account.
R2 can be reduced from 10k to 3.3k or 2.2k for very slightly better signal output with the changed FET.
Ian
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I was wondering if someone could explain more about changing the value of R2. Is this recommended change to reduce the extra output from Q1 or is it to help boost the level from Q1, I didnt quite understand it.
thanks
Mike