David WA5DJJ
http://www.qrp-labs.com/synth.html
Arv K7HKL
On Sat, Jun 6, 2015 at 11:33 AM, David R. Hassall WA5DJJ <
dhassall@xxxxxxxxxx> wrote:
Dear Members,
I need a good SI5351 VFO/ BFO design that I can build up using an Arduino
processor and a
Display. I want to put it on a MINIMA VERSION 3 … to build a simplified
SSB transceiver.
Some of you are a bit ahead of me in building this up and may have found
one that worked
Really well for you. Any suggestions greatfully appreciated to help me
narrow the search down
To something I can build and use, quickly.
Take care and have fun…
73 Dave WA5DJJ Las Cruces, New Mexico
Website: http://www.zianet.com/dhassall/
*From:* minima-bounce@xxxxxxxxxxxxx [mailto:minima-bounce@xxxxxxxxxxxxx] *On
Behalf Of *Joe Rocci
*Sent:* Saturday, June 06, 2015 9:28 AM
*To:* minima@xxxxxxxxxxxxx
*Subject:* [minima] Re: Modified Diode Mixer
Hi Mike
That mixer design looks like it should work well, except it will possibly
require more LO drive due to the losses in the resistors. What values does
the original author recommend for the resistors?
I assume that your PSK31 xmtr has some sort of envelope shaping to prevent
spatter due to the abrupt phase transitions. I'd like to learn more about
it.
Joe
W3JDR
Sent from my Galaxy Tab4 10.1 4G LTE Tablet
-------- Original message --------
From: M <ezeepsk@xxxxxxxxx>
Date: 06/06/2015 7:36 AM (GMT-05:00)
To: minima@xxxxxxxxxxxxx
Subject: [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
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