[amsat-bb] High Power and Rudeness

[Mac A. Cody]

Zach,

I've been contemplating a single band, transmit-only version of the
QCX-SSB, developed by Guido PE1NNZ:
     QCX-SSB: SSB with your QCX transceiver (modification)
     https://github.com/threeme3/QCX-SSB

This is based on his work on Class-E driven SSB transceiver:
     Direct SSB generation by frequency modulating a PLL:
http://pe1nnz.nl.eu.org/2013/05/direct-ssb-generation-on-pll.html

I saw something similar that was being done with a Teensy board, but
that link appears to have broken.

I don't see a reason why this couldn't be adapted to 2m/70cm band
operation by replacing the SI5351 PLL with one of the high-
frequency versions of an SI570 PLL and a higher-frequency Class-E
amplifier.  I would keep it simple by having the transmitter filter
for either 70cm or 2m.  SSB reception could be done with any number
of analog or SDR receivers.

I wish I had the time to work on this idea.

73,

Mac Cody / AE5PH

On 3/15/20 4:48 PM, Zach Metzinger via AMSAT-BB wrote:
> On 03/15/20 13:48, Jeff Johns via AMSAT-BB wrote:
>
> Here are a few of my thoughts:
>
> Some enterprising soul should design, using common, off-the-shelf ICs, 
> a simple PCB that is a SSB/CW 2m/440 duplex radio. Make the plans 
> available freely on the WWW, etc. Get a groundswell behind it, and 
> then watch the Asian clone makers swoop in and commercialize it (while 
> also optimizing every last penny spent). Presto, lots of 2m/440 linear 
> operators. Worked for nanoVNA, mikrocontroller's transistortester, 
> etc. Should work for our crowd.
>
>
> --- Zach
> N0ZGO
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