In Stock NOW ~ Xiegu QRP Radio’s and Radioddity Antenna’s
Upgrade your QRP Labs QMX+ with a professionally integrated OLED display system designed specifically for the AC8L ATU platform. These custom display kits provide enhanced tuner visibility, improved field operation, and a clean factory-style installation directly into the QMX+ aluminum housing.
Each OLED upgrade package includes:
Precision milled QMX+ aluminum top cover
Pre-installed OLED display assembly
Connection wiring harness
Installation instructions
Custom AC8L ATU OLED firmware
Ready for field or portable operation
These upgrades are designed to provide a clean and rugged installation while maintaining the compact form factor of the QMX+.
A compact and lightweight OLED display option that provides clear tuner information while maintaining a minimal footprint on the radio enclosure.
Features:
Compact low-profile display
Excellent readability in portable operating conditions
Clean integrated appearance
Ideal for users wanting a simple extra small display solution
A larger OLED display option for improved visibility and easier viewing during portable, mobile, or low-light operation.
Features:
Larger display area for improved readability
Enhanced viewing angle
Integrated milled aluminum top cover
Clean professional installation
The most advanced OLED option available for the AC8L ATU system. This version includes integrated 3-button control capability, allowing expanded tuner operation and menu navigation directly from the front panel. Eliminates the one button and single oled control on the front pannel. Allows user to retain the orignal QMX+ milled aluminum front pannel.
Features:
Large 0.96" OLED display
Integrated 3-button control interface
Improved user control and tuner accessibility
Designed for advanced field operation and tuning functions
Each OLED kit includes information on the required custom firmware changes necessary for OLED functionality with the AC8L ATU system.
If purchased together with an AC8L ATU kit, the PIC controller can be pre-flashed with the custom firmware before shipment.
Users installing the OLED upgrade onto an existing ATU will need a PICkit 3, PICkit 4, or PICkit 5 programmer to flash the included firmware onto the PIC controller or modify the HEX values.
These OLED upgrades are intended for users familiar with basic electronic assembly, soldering procedures and PIC programing expirance. Moderate assembly experience is recommended.
The precision milled top cover provides a clean and professional appearance while maintaining durability for portable and field radio use.
Designed specifically for:
QRP Labs QMX+
AC8L ATU
CQ Homestead Supply incorporates modifications to the AC8L ATU's RF sensing circuit to improve tuning performance at low power levels, particularly when using the QRP Labs QMX and QMX+ radios. These changes have not been included in the Github documents, but are from the developers of the ATU design.
The original 10:1 RF sensing transformer has been changed to 5:1, and the resistor-divider circuit has been modified to increase sensitivity. These changes improve tuning reliability when operating at reduced power, including during the QMX/QMX+ Tune SWR function.
Because of these modifications, the optional OLED can display approximately 16 times the actual RF output power when EEPROM Cell 31 is set to 10. For example, an actual output of 1 watt may display as 16 watts, while 6 watts may display as 96 watts. Users should devide all readings by 16 to get an approximate reading if cell 31 is set to 10. Changing Cell 31 to 05 adjusts the firmware's RF transformer setting and reduces the OLED's displayed power reading. All CQHS kits are programed with cell 31 set to 5 to give the user the closest posable reading.
Important: The setting of Cell 31 to 05 may prevent the tuner from initiating a tune below approximately 1 watt on standard configured QMX+ radios. Operators using higher-power QMX/QMX+ configurations may find this acceptable.
These incorrect readings are normal and do not indicate a problem with the tuner. SWR and tuning information remain useful, but the displayed power should not be considered an accurate wattmeter reading. It should only be used for general reference only and verified by a dedicated watt meter for precise measurements.
These modifications prioritize low-power tuning over displayed power accuracy.
We recommend using the QMX+ reduced-power Tune SWR function when performing antenna tuning if you are using the BS170 power mod.
Upgrade your QRP Labs QMX+ with a professionally integrated OLED display system designed specifically for the AC8L ATU platform. These custom display kits provide enhanced tuner visibility, improved field operation, and a clean factory-style installation directly into the QMX+ aluminum housing.
Each OLED upgrade package includes:
Precision milled QMX+ aluminum top cover
Pre-installed OLED display assembly
Connection wiring harness
Installation instructions
Custom AC8L ATU OLED firmware
Ready for field or portable operation
These upgrades are designed to provide a clean and rugged installation while maintaining the compact form factor of the QMX+.
A compact and lightweight OLED display option that provides clear tuner information while maintaining a minimal footprint on the radio enclosure.
Features:
Compact low-profile display
Excellent readability in portable operating conditions
Clean integrated appearance
Ideal for users wanting a simple extra small display solution
A larger OLED display option for improved visibility and easier viewing during portable, mobile, or low-light operation.
Features:
Larger display area for improved readability
Enhanced viewing angle
Integrated milled aluminum top cover
Clean professional installation
The most advanced OLED option available for the AC8L ATU system. This version includes integrated 3-button control capability, allowing expanded tuner operation and menu navigation directly from the front panel. Eliminates the one button and single oled control on the front pannel. Allows user to retain the orignal QMX+ milled aluminum front pannel.
Features:
Large 0.96" OLED display
Integrated 3-button control interface
Improved user control and tuner accessibility
Designed for advanced field operation and tuning functions
Each OLED kit includes information on the required custom firmware changes necessary for OLED functionality with the AC8L ATU system.
If purchased together with an AC8L ATU kit, the PIC controller can be pre-flashed with the custom firmware before shipment.
Users installing the OLED upgrade onto an existing ATU will need a PICkit 3, PICkit 4, or PICkit 5 programmer to flash the included firmware onto the PIC controller or modify the HEX values.
These OLED upgrades are intended for users familiar with basic electronic assembly, soldering procedures and PIC programing expirance. Moderate assembly experience is recommended.
The precision milled top cover provides a clean and professional appearance while maintaining durability for portable and field radio use.
Designed specifically for:
QRP Labs QMX+
AC8L ATU
CQ Homestead Supply incorporates modifications to the AC8L ATU's RF sensing circuit to improve tuning performance at low power levels, particularly when using the QRP Labs QMX and QMX+ radios. These changes have not been included in the Github documents, but are from the developers of the ATU design.
The original 10:1 RF sensing transformer has been changed to 5:1, and the resistor-divider circuit has been modified to increase sensitivity. These changes improve tuning reliability when operating at reduced power, including during the QMX/QMX+ Tune SWR function.
Because of these modifications, the optional OLED can display approximately 16 times the actual RF output power when EEPROM Cell 31 is set to 10. For example, an actual output of 1 watt may display as 16 watts, while 6 watts may display as 96 watts. Users should devide all readings by 16 to get an approximate reading if cell 31 is set to 10. Changing Cell 31 to 05 adjusts the firmware's RF transformer setting and reduces the OLED's displayed power reading. All CQHS kits are programed with cell 31 set to 5 to give the user the closest posable reading.
Important: The setting of Cell 31 to 05 may prevent the tuner from initiating a tune below approximately 1 watt on standard configured QMX+ radios. Operators using higher-power QMX/QMX+ configurations may find this acceptable.
These incorrect readings are normal and do not indicate a problem with the tuner. SWR and tuning information remain useful, but the displayed power should not be considered an accurate wattmeter reading. It should only be used for general reference only and verified by a dedicated watt meter for precise measurements.
These modifications prioritize low-power tuning over displayed power accuracy.
We recommend using the QMX+ reduced-power Tune SWR function when performing antenna tuning if you are using the BS170 power mod.
