QRP Labs QCX+
firmware v1.09a
QRP Labs · Released Apr 28, 2022 · First seen Sep 7, 2026
Source:
qrp-labs.com
v1.09a is the latest firmware for the QRP Labs QCX+, released April 28, 2022.
In short — summary by updatemystuff.com
160m now uses phase-shift implementation with 25/27MHz crystal instead of 12MHz; CAT command fixed
- 160m operation uses phase-shift implementation instead of 12MHz crystal
- 25MHz TCXO or 27MHz crystal required for 160m
- CAT command fixed on 160m
Written from QRP Labs's release notes, which are printed in full below.
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What's in this update
- Support 160m operation on the MS5351M by a time-delay 90-degree phase shift implementation, rather than relying on use of a 12MHz crystal which does not seem to work properly on MS5351M. With firmware 1.09 and up, a 25MHz TCXO or 27MHz crystal must be used for 160m operation. Not 12MHz crystal.
- Bug fix: 1.09a implements a bug fix, CAT did not work properly (FA command) on 160m.
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