RadioBanter - View Single Post

March 23rd 06, 05:35 PM posted to rec.radio.amateur.homebrew

wrote in
:

I've used it and have a box load of them (3028, 3026 and related
parts) still. IP3 depends on bias applied and load it's decent and
far above the single transistor mixer. If the input and output are
balanced the IP3 is around the -10 to 0dbm range depending on
bias current and specific circuit. It's advantage is the LO power
needed is quite low as well as low DC power needs.

It's still possible to find the parts or related differential pair
with current source parts (RCA had a whole series of them).

They also make decent AGC If amps.

Allison
The singly balanced mixer using 2 DG MOSFETs seem to be better still.
Does it have a higher IP3 than a single ended mixer?

Why use a AD831 if the noise figure is 10dB?

JJ