QRP Labs QDX
firmware v1_05
QRP Labs · Released Sep 30, 2022 · First seen Sep 7, 2026
Source:
qrp-labs.com
v1_05 is not the latest firmware for the QRP Labs QDX: the current version is v1_10 (July 19, 2023). Go to v1_10
In short — summary by updatemystuff.com
TX range extended to 0.3-60MHz supporting 160m and 630m bands, new Image sweep screen, and fixed sweep gain calculations.
- TX frequency range extended to 0.3-60MHz with 160m and 630m band support
- New Image sweep screen measures superhet images
- Fixed gain bug in sweeps with proper log10-to-dB conversion
Written from QRP Labs's release notes, which are printed in full below.
Was this useful? Thanks.
What's in this update
- RF Sweep locks band settings and PLL divider, at the center frequency divider
- Default Cyan colour for grid on AF sweep, RF sweep and Input analysis screens
- Pressing . on AF or RF sweep changes the grid colour, like Input screen
- Colour of the grid in each screen is persisted for the operating session
- RF Sweep, addeed R to refresh current band (re-sweep)
- Fix gain bug in RF and AF sweeps (should be fixed at 5000. not use the BandConfig value)
- Proper log10 conversion to dB for sweeps etc
- New Image sweep screen, sweeps and measures superhet image 24kHz down the band
- Fix CAT AG command (audio gain)
- Add CAT VN command (firmware version); read-only, VN; returns VN1_05_003;
- VGA and VT220 terminal option by soldering wires to microcontroller pins
- Added three new serial ports 1/2/3
- AUX PTT - positive and negative PTT outputs independently controlled on TX and RX per band
- Config screen now has "PTT Port as Serial 3" as enable/disable
- Config and BandConfig screens don't stop radio operation now
- TX disabled during Input Analysis screen
- Press M in Input Analysis screen shows sub-window with CAT comms; and scroll only when signal present
- Change TX limits from 1-30MHz to 0.3-60MHz
- Version supports 160m and 630m (delay method of 90-degree quadrature generation)
- Added "PIN fwd bias (mA)" to Band Config screen
- Finalized SMPS control loop for Rev 4 PCB PIN diode forward bias buck converter
- Update year to 2022 on firmware version in terminal
updatemystuff.com never hosts firmware files — always download from the official source.
Get it from QRP LabsWatch the QDX for updates
Create a free account and get an email the moment QRP Labs publishes new firmware.
Create account & watch