Midland 75822 Channel Mod [VALIDATED FULL REVIEW]

Here’s a concise, technical write-up for the Midland 75822 channel modification, commonly performed to expand transmit/receive frequencies beyond the stock 40 CB channels.

Step 1: Disassemble the Radio

1. Remove the battery pack and antenna.
2. Remove the four screws on the back of the chassis.
3. Carefully separate the front and back housing. You will see the main PCB (printed circuit board).
4. Locate the PLL chip – a small (usually 16 or 18-pin) IC near the channel selector knob. Look for markings like "LC7137," "D8581," or "MC145106."

Understanding the Modification (The Theory)

Most CB radios, including the Midland 75-822, generate their frequencies using a Phase-Locked Loop (PLL) circuit. The radio is artificially restricted by manufacturers to stay within the legal 40-channel limit.

The modification usually involves manipulating the PLL chip logic. By tricking the radio into thinking it is allowed to tune lower or higher, you can unlock the potential "hidden" channels that the hardware is physically capable of producing. midland 75822 channel mod

Midland 75822 Channel Mod: What You Need to Know Before You Transmit

If you own a Midland 75822 (often part of the "75-822" or similar legacy series), you might have stumbled across old forum posts mentioning a "channel mod" or "expansion." Before you reach for a soldering iron or try to clip a wire, let’s break down what that actually means, whether it’s possible, and—most importantly—why it’s probably a bad idea.

Part 1: Understanding the Baseline – What is the Midland 75822?

Before we touch a single screwdriver, it’s crucial to understand what the Midland 75-822 (often typed as 75822 due to a common typo) is and isn’t. Here’s a concise, technical write-up for the Midland

• Type: Handheld CB radio
• Frequency range (stock): 26.965 MHz to 27.405 MHz (40 channels, AM)
• Power output: 4 watts (maximum legal for CB)
• Special features: Detachable antenna, battery pack, and an included magnetic mount antenna for use as a mobile CB.

Under normal operation, the radio covers the FCC-designated 40 CB channels. These are shared by truckers, off-roaders, and hobbyists. The radio is not designed out-of-the-box for amateur radio (HAM) bands, freeband, or export frequencies.

So why modify it? Because many users want access to: Step 1: Disassemble the Radio

• Upper Side Band (USB/LSB) – Though this radio is AM only (sideband mods are nearly impossible on this unit).
• “Freeband” frequencies – Just above and below the legal CB band, used by unlicensed operators worldwide.
• Additional “alpha” channels – Used in some countries outside the USA.

The "75822 channel mod" is almost exclusively an attempt to add Extra channels above Channel 40 and below Channel 1 by modifying the Phase-Locked Loop (PLL) circuit.

2. You Could Interfere with Emergency Services

Frequencies just above CB (27.5–28.0 MHz) are allocated to government, aeronautical, and emergency communications. Accidentally transmitting there could disrupt critical services.