Disassembling the housing reveals a series of micro-solder pads or trace configurations (labeled as jumpers or configuration resistors) near the main CPU chip.
Unlocking these bands transforms the Midland 75-822 into an "export-style" multi-band transceiver. It gives you access to open frequencies when standard channels are cluttered with local noise or atmospheric skip interference. How the Mod is Performed (Technical Overview) midland 75822 channel mod
Accessing frequencies higher than the legal Motivations for Expansion Disassembling the housing reveals a series of micro-solder
If you still want to experiment for purely educational bench testing (into a dummy load, never on air), ask yourself: How the Mod is Performed (Technical Overview) Accessing
Depending on the board version, bridging a specific set of open pads with a solder blob or removing a specific zero-ohm resistor/diode tells the microprocessor to boot up in multi-band mode.
The Midland 75822 is typically a 40-channel CB (Citizens Band) radio transceiver from the late 1970s or early 1980s. It operates legally on between 26.965 MHz and 27.405 MHz, with 4 watts of AM power.
In a vehicle, mounting an external antenna on the roof or trunk provides a better ground plane, which is more effective for range than any internal frequency modification.