QRP Labs QDX-M
firmware v1_03
QRP Labs · Released Dec 23, 2021 · First seen Sep 7, 2026
Source:
qrp-labs.com
v1_03 is not the latest firmware for the QRP Labs QDX-M: the current version is v1_10 (July 19, 2023). Go to v1_10
In short — summary by updatemystuff.com
Enables 160m transmission and changes RX/TX/LPF switching from OpenDrain to Push-Pull.
- Enables transmission on 160m band
- Switches RX, TX, and LPF control signals from OpenDrain to Push-Pull
- 160m receive operates as direct converter with limited performance through 80m filters
Written from QRP Labs's release notes, which are printed in full below.
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What's in this update
- Frimware for PCB Rev 2. Backwardly compatible with PCB Rev 1
- Changes OpenDrain RX, TX and LPF switching signals to Push-Pull (pull-up resistors removed in Rev 2)
- Allows transmit on 160m, and receive acts as direct conv., poor performance through the 80m filters.
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