Thanks Steve,
I didn't have the article open at the time and had forgotten about
the pot that Dallas had. It amounts to sort of the same thing -
varying the DC bias on the gate - but keeps the impedance relatively
constant.
I'm aware of IP2 and IP3 although I've never measured them. One of
these days I'll set up the proper equipment to do that. Have you
ever tried either of these circuits in a balanced/differential
configuration?
Rob
--- In loopantennas@..., "Steve Ratzlaff"
<steveratz@...> wrote:
Hi Rob,
I adjusted the bias voltage to the jfet, with the corresponding
change in
the circuit total current.
