Re: QRP Rcvr Front Ends

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From: John F. Woods (jfw@ksr.com)
Date: Tue May 17 1994 - 17:07:54 EDT


I don't know if they're available as kits, but the 18/10 meter receiver
in recent Handbooks uses a dual-gate MOSFET mixer (no preamp), as does
(I think) the high-performance W1CER (=W1FB) receiver described in Solid
State Design. I don't know the relative performance, but the circuitry
in each is relatively simple (complicated chiefly by an abundance of
filter components).

> I noticed a good article by Stan AK0B in the
> North West QRP newsletter on the use of a more expensive (how
> much more ?) MC34119P audio chip

Newark's current catalog lists them at $1.20 each (with a $50 minimum
order), though their catalog is frequently way off on prices. I don't
have its data sheet handy.


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