Have a question about which connector or power supply or antenna cable you should get? Here’s an easy reference to use when you’re ordering parts. I make every effort to keep this updated, but in some cases the manufacturers themselves are contradictory. Check YOUR hotspot to make sure you’re getting the right connector!
|Manufacters||RF Connector||Power Supplies and PoE Adapters||Mfr Link|
|NEBRA HNT Outdoor Hotspot Miner||N‑Type Female||POE preferred or DC Barrel Jack — 2MM Pin, 6.5MM Barrel centre positive. Recommended PSU 12V @1.5A.||Specs Here|
|NEBRA HNT Indoor Hotspot Miner||RP-SMA Female||DC Barrel Jack 6.5 x 2.0 mm, 12V 1.5A. PoE splitter option||Specs Here|
|Bobcat Miner||RP-SMA Female||Power via DC 12V or PoE Splitter Option — Barrel Jack 12V 5.5X2.1mm||Specs Here|
|RAK v2 Hotspot Miner||RP-SMA Female||USB‑C Power Supply or PoE Splitter Option — Type C 5V Gigabit||Specs Here|
|SyncroB.it HNT Gateway||RP-SMA Female||2.5mm, 12 Volt Power Jack Option or — Passive PoE (12–55 volts)||Specs Here|
|OG Helium Hotspot||RP-SMA Female||Power via DC5V or PoE Splitter Option — Barrel Jack 5V 3Amps 5.5X2.1mm|
|RAK v1 Hotspot Miner||RP-SMA Female||USB‑C Power Supply or — PoE Splitter Option — Type C 5V Gigabit|
|LongAP||SMA Female||Barrel Jack 12V 2A 5.5X2.5mm|
|LongAP Pro||N‑Type Female||PoE 802.3at||Specs Here|
|LongAP Light||RP-SMA Female||PoE 802.3af, Barrel Jack 12V 1A 5.5X2.1mm (to be finalized)||Specs Here|
|SenseCAP M1||RP-SMA Female||USB C, DC 5v 3A||Specs Here|
As you’ll see, most of the production miners use an RP-SMA connection. That means the cable you’ll want to order if you’re installing an aftermarket antenna will be RP-SMA male <–> (usually) N‑type male.
Want to dive deeper, check out some pictures, and learn a little more? Here we go!
RP-SMA stands for Reverse Polarity SubMiniature version A). The RP series were designed to stop you from connecting an “unauthorized antenna” to your gear, whether that’s a Helium hotspot or any radio. The FCC’s thought process was along the lines of, “all manufacturers will have RP-SMA so you can only connect them to RP-SMA capable antennas, and nobody will sell RP-SMA connectors to consumers.” Prior to the internet making all information and parts available to everyone, that method worked well enough. Now, it’s just confusing. Onward!
Female RP-SMA connectors have a female contact body (ground) and a male inner pin contact (signal). A male RP-SMA connector is the opposite in both respects — male body (inside threads) with a female inner sleeve contact.
Here are all four connector types. You’ll also see the female referred to as an “jack”, and the male referred to as “plug”. Slightly confusing, right?
Next up: N‑Type Connections
Ok, that’s the confusing stuff out of the way. Here is what you’ll typically see when connecting to an aftermarket antenna. These are called N‑type connections, and are larger in size the the SMA series.
COMMON ANTENNA CONNECTIONS
Ok, that should clear up most of the questions surrounding what cable connection you have, and what you should get.
If you’d like to go beyond just connecting some cables, please consider hiring me to help optimize your hotspot placement. I dive into strategy, individual hotspot optimization, and helping you understand where you can prosper in the Helium ecosystem. Rock on!