Paul Burridge wrote:
On Sat, 21 Feb 2004 18:22:44 +0000, Leon Heller
wrote:



Paul Burridge wrote:

Anyone care to nominate an RF mixer chip for 100Mhz that's readily
available in the UK?

What sort of performance is required?


"Good." :-)


Diode mixers are easy to obtain
and have good IMD characteristics. The impedances on the ports need to
be properly matched.


What - the sort of crossed diode config one often sees in the ham
design books? Do you think I might as well just make one up from
discretes? I'm basically just trying to combine 60Mhz with 20Mhz to
end up with the difference frequency in this case. JJ suggested a
chip, but looking at the data sheet, it seemed to be designed more as
a modulator than a mixer. Let's not get into an argument over
semantics but y'all know what I mean, I'm sure.

You could make your own, but an MCL TUF-1 or SBL-1 won't be all that
expensive. They do need a 7 dBm local oscillator drive level.


BTW, thanks for a good steer with the Pulsonix suggestion, Leon. I'm
making good progress getting to grips with it.

You could join the Pulsonix UG:

http://groups.yahoo.com/group/PulsonixUG/

Leon
--
Leon Heller, G1HSM
Email:
My low-cost Philips LPC210x ARM development system:
http://www.geocities.com/leon_heller/lpc2104.html