What AM CB Actually Is, and Who Still Uses It
AM CB is a transceiver operating on the 26 and 27 MHz band, using AM or SSB (Single Sideband) modulation. It's a genuinely different piece of technology to the UHF CB handhelds most people picture today, older, lower frequency, and prone to a curious phenomenon called "skip," where signals bounce off the atmosphere and occasionally travel hundreds or thousands of kilometres under the right conditions.
Its remaining user base today is fairly specific: long-haul truck drivers, where AM CB culture runs deep and vehicle-mounted units are still common, some rural and farming users who've had a set fitted for decades and never had a reason to change, and hobbyists interested in the unique long-range propagation the band offers.
A Brief History and the 1994 Deregulation
Citizen band radio arrived as a global craze in the 1970s, and New Zealand set up its own allocation on the 26 MHz band rather than simply adopting the 27 MHz standard used in much of the rest of the world. For years, operating a set here required an individual licence from Radio Spectrum Management, with its own fees and paperwork.
That changed on 1 July 1994, when RSM removed the requirement for an individual operator licence. AM CB has been covered under a General User Radio Licence since, which today covers both the 26/27 MHz CB band and the 477 MHz PRS band under the same free, no-application licence type. Your equipment still has to meet RSM's technical standards regardless, deregulation removed the paperwork, not the rules.
AM CB vs UHF CB: Which One Do You Actually Want?
This is genuinely the most important question in this whole guide, and it's one most "CB radio" content in NZ skips entirely.
| Factor | AM CB (26/27 MHz) | UHF CB / PRS (477 MHz) |
|---|---|---|
| Obstacle penetration | Weaker around buildings, trees and hills | Noticeably better in obstructed terrain |
| Channels | 40 channels | 80 channels, expanded from 40 in 2011 |
| Current gear availability | A shrinking but real range, mostly vehicle-mounted units | The dominant, actively developed option, handheld and mounted |
| Culture and community | Strong in long-haul trucking | Dominant in farming, 4WD, forestry, construction |
| Notable trait | Long-range atmospheric "skip" propagation, unpredictable but occasionally very long distance | Consistent, predictable local coverage |
If you're already part of trucking's AM CB culture, or you specifically want a set to match an existing fleet or community, AM CB genuinely still makes sense. For nearly everyone else buying their first radio today, farmers, 4WDers, tradies, forestry crews, UHF CB is the more practical starting point. See our full UHF Radio NZ guide for that side of the decision.
Choosing Gear and Getting the Antenna Right
A handful of genuine, current AM CB options are still available. The GME TX2720N ($299 alone, or $339 as a kit with a matching antenna) is a 40-channel DIN-mount unit built for vehicle installation. The Uniden PRO5050 ($279.99) is a 12/24V DIN-size AM CB radio with 4 watts maximum output, a genuine option for both light vehicles and trucks running on 24V systems. Midland also has two current models: the Midland ALAN 42 DS ($549), a portable 26 MHz AM CB set, and the Midland M5-Pro ($504.85), a compact fixed-mount 26 MHz unit.
Range genuinely varies with terrain, antenna and atmospheric conditions, anywhere from 1 to 20km, but a typical mobile setup should give you around 2-8km in normal conditions. A home base station with a larger roof-mounted antenna will usually outperform a ground-level mobile unit.
The radio itself is only half the job. AM CB antennas, such as the GME AE2400N (60cm) or AE2402N (120cm), need proper grounding against a metal vehicle surface and a correctly tuned SWR (Standing Wave Ratio) to perform. As a general rule, taller is better, mount as high as practical and try to get at least half the antenna above your roofline. Antennas shorter than a metre generally underperform regardless of brand. A poorly matched antenna doesn't just weaken your signal, it can damage the radio's output stage over time. This is exactly the kind of install detail worth having a specialist check rather than guessing.
On-Air Etiquette Basics
AM CB channels are a shared public resource, and the culture around them has its own long-standing conventions.
- Listen before transmitting, to avoid cutting across an existing conversation.
- Keep transmissions brief and to the point, especially on channels used for coordination rather than general chat.
- If you hear a distress call on any channel, stay clear and let it through. Emergency traffic always takes priority.
- Regional and industry conventions vary, listen for a while on an unfamiliar network before assuming how it's used.
For the broader principles that apply across radio types, see our radio etiquette guide.
Getting the Right System in Place
Mobile Systems Limited is 100% New Zealand owned and based in Mount Maunganui, with over 25 years supplying and installing two-way radio equipment, including both AM CB and the UHF CB gear that suits most modern buyers better.
