: Users strongly advise writing down every single factory parameter (all 53+ items) before making any changes.
Ensure that the SSB power adjustment settings in the service menu are not set too low.
While AnyTone does not officially publish these hidden parameters, amateur radio communities on platforms like the WorldwideDX Radio Forum have successfully mapped out the primary channels: Parameter Channel Display / Function Purpose & Common Use Case AM Hi Pwr
The has quickly earned its reputation as one of the most versatile 10-meter transceivers on the market, favored by amateur radio operators and enthusiast community members alike. While the standard user menu offers 36 options for general customization, deep-level calibration requires stepping into the hidden factory engineering system. Managing settings via the AnyTone AT-5555N II service menu allows operators to fine-tune dead key power, balance SSB modulation, adjust local oscillator offsets, and clear up receiver static noise without touching an analog potentiometer on the circuit board. anytone at5555n ii service menu work
Press the FUNC key or power down the radio to save the changes to the EEPROM non-volatile memory. Critical Safety Warning: Look Before You Leap
Achieve 40W carrier with 90-95% positive peak modulation.
: Key the microphone (PTT) to see the current value of the selected item. : Users strongly advise writing down every single
Ensure you are using the correct exit sequence (usually holding the FUNC key). If the radio power cycles abruptly due to a loose DC power connection, the EEPROM will reject the changes and revert to the last saved state.
Accessing the service menu requires a specific key combination during the radio's power-on sequence. Step-by-Step Entry Procedure
If you have searched for the phrase you are likely an owner experiencing frequency drift, low transmit power, or a desire to fine-tune the receiver. You are no longer satisfied with "factory specs"; you want perfection. While the standard user menu offers 36 options
Adjust first to bring the radio as close to the target center frequency as possible.
Use a high-quality dummy load and an accurate watt/SWR meter, or a radio service monitor, to ensure proper alignment.
Next was the power calibration. He keyed the microphone, watching the meter on the radio jump. The needle slapped the red zone instantly—dangerous. If he transmitted like that, he’d blow his final transistor, leaving him truly silent.