Ben
If the resistor values are large enough, you could minimize additional
conversion loss at the expense of more LO voltage. One might also use RF
chokes. All that said, I agree that trifilar windings would be better.
Joe
W3JDR
Sent from my Galaxy Tab4 10.1 4G LTE Tablet
-------- Original message --------
From: beninturkye@xxxxxxxxx
Date: 06/06/2015 10:29 AM (GMT-05:00)
To: minima@xxxxxxxxxxxxx
Subject: [minima] Re: Modified Diode Mixer
Dear mike,
In this mixer you have resistors loading the input and output so you must
expext some more signal loss than the usual 6 dB, so think of 9 dB.
I would opt for trifilair windings.
Regards Ben PA9B
-------- Origineel bericht --------
Van:M
Verzonden:Sat, 06 Jun 2015 14:36:06 +0300
Aan:minima@xxxxxxxxxxxxx
Onderwerp:[minima] Modified Diode Mixer
Hi all,
I came across a modified diode mixer in an old Technical Topics in
Radcom (May 05), designed by G3UUR. It looks easier to build than the
mixer in the Minima 3 schematic, since it uses bifilar rather than
trifilar windings. I haven't built it, but would be interested to
hear if it has any disadvantages. I've attached it, and put it on my
site, psk-31.com
Mike G1ZVN
