Hi Joe,
The resistors are 47 Ohm so you run up considerale losses, apart from that, the
resistors must be non inductance types and really equal to eachother as the
balance depend on that.
I really would take trifilar.
Typed on my Asus Zenfone 5.
Regards Ben PA9B.
ASUS'umdan gönderildi.
-------- Origineel bericht --------
Van:Joe Rocci <joe@xxxxxxxxxx>
Verzonden:Sat, 06 Jun 2015 18:32:26 +0300
Aan:minima@xxxxxxxxxxxxx
Onderwerp:[minima] Re: Modified Diode Mixer
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
