Modding the Motorola XPR-7550 stock antenna

Modding the Motorola XPR-7550 stock antenna

I finally bit the bullet and ripped apart one of my XPR-7550’s stubby antennas to modify it to accept/accommodate an external antenna.

As many of us XPR-7550 portable radio owners know (some the hard way), that the radio’s antenna intake needs a special type of an antenna with a unique connector.  You could buy an OEM adapter to accommodate an external antenna if you have $200 big ones to shell.

Motorola XPR 7550e

Motorola XPR 7550e

The “e” version’s main updated features include, but is not limited to, the following:
  • The  “e” version can stay submerged in water for two hours; the non “e” version can stay under water for thirty minutes;
  • The “e” version has wi-fi feature; but, I never used it on my XPR 7550e; and,
  • The “e” version claims it has an 8% receive signal range — I never had any problems with receive signal range with the non “e” version; and, all my signal tests I’ve done with the non “e” version passed with flying colors.

Motorola XPR GPS->OpenSPOT->APRS.FI

Motorola XPR GPS->OpenSPOT->APRS.FI

Summary of Setups:
Moto CPS - Requires changes to a number of fields for each GPS enabled channel.
BrandMeister - Need to register in SelfCare and select, call sign, radio, icon, text message.
OpenSPOT - Need to select server 3102 or try other servers if no icon appears.
Even with all the correct settings it can take about 5 minutes for the GPS data to appear on APRS.FI.

Motorola's MOTOTRBO Talk Permit Tone (TPT) Custom Tones

Motorola's MOTOTRBO Talk Permit Tone (TPT)

Motorola's MOTOTRBO Talk Permit Tone (TPT) consists of 4 tones of 40ms duration, with no silence in between tones. It makes a warble type sound. I don't remember the tone frequencies off the top of my head right now.

Update :   MOTOTRBO TPT:  The exact MOTOTRBO Talk Permit Tone (TPT) tones I couldn't remember the 4 tone frequencies off the top of my head but since found them here;

MOTOROLA is for winners

Motorola XPR7550E (VHF/UHF) Two-Way Radio
Motorola XPR7550IS VE3WZW
Motorola XPR7550IS
MOTOROLA is for winners.
Have always been happy with the best.

Receive up to a $1,200 rebate* with the purchase of 10 XPR7550e portable two way radios. The XPR 7550e comes with features that power users want, such as a large push-to-talk button, best in class audio, and enhanced privacy.

Motorola XPR7550e

One of my favorite Motorola XPR7550e.


With this dynamic evolution of MOTOTRBO digital two-way radios, you’re better connected, safer and more productive. The XPR7000e Series is designed for the skilled professional who refuses to compromise. With high-performance integrated voice and data, and advanced features for efficient operation, these next-generation radios deliver complete connectivity to your organization.

Here's what's new in these next-generation radios:
  • Integrated Wi-Fi
  • Over-the-air software updates
  • Bluetooth® 4.0
  • Indoor location tracking
  • Integrated accelerometer for optional Man Down
  • Enhanced audio quality
  • Improved expandability, 
  • Better battery life (up to 29 hours)
  • Better range (up to 8%)
  • Better waterproofing (IP68)

How to use the MOTOTRBO XPR 7550

How to use the MOTOTRBO  XPR 7550


Callgroups - XPR 7550

Callgroups - XPR 7550

XPR-6550 vs. XPR-7550

The stock antenna covers 380-512mhz and is quite long. A better antenna is the 440-490mhz model which is just shy of 4" long and has better gain. This is the one I use.

There currently is no way to connect an external antenna to this radio. The RF port, located at top rear under a plastic cover, was designed for test purposes only and will not tolerate the stresses of an external cable. The /\/\ adapter for the RF test port cost around $300 and is made up of two parts.

I think the biggest and most obvious differences is the 7 has a bigger display and full color, has more channels ( a lot more but probably way more than you'll ever need on the ham band) , higher capacity batteries, it meets more military specifications, the radio itself is bigger and looks more like a real radio in my opinion and it has some other features you probably wont ever use like enhanced privacy.

6550
+Better battery life - almost 2X

Motorola Mototrbo XPR 7550 REVIEW

Motorola Mototrbo XPR 7550 REVIEW

Mototrbo XPR6550 vs XPR7550

Mototrbo XPR6550 vs XPR7550

Here are some of the features of the 6550 & 7550 radios. Both are analog and digital mode, the 7550 comes standard with the LTR trunking board pre-installed but extra for activation, and in the CPS you can set a password for some programming on the go such as : edit ch name, zone name (but NOT a freq entry). An LTR option board can be installed in the 6550 for around $135 extra when purchased new only from Moto, and later can be used in other 6550's as well. There is a voice channel announcement feature on the 7550 when working I will show how it works in another video. As of Oct 2016, I no longer have these radios. Going to take a break and try a APX-8000 (non DMR) and go back and try a CS-700 or SL-7550 (much slimmer).

Motorola XPR 7550

Motorola XPR 7550

With this dynamic evolution of MOTOTRBO digital two-way radios, you’re better connected, safer and more productive. The XPR7000e Series is designed for the skilled professional who refuses to compromise. With high-performance integrated voice and data, and advanced features for efficient operation, these next-generation radios deliver complete connectivity to your organization.