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 _______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb