Airsoft Canada - View Single Post - REVIEW: AN/PRC-148 MBITR, working replica by United-Star

Tracker33 · May 11th, 2013, 12:35

I've got the newer "Deluxe" version of the United Star PRC-148. Purchased it from PX airsoft. It has the CCI sticker on the top.

Wiring for U-283 is as follows:
A-red/white stripe
B-tan/brown stripe
C-black
D-white
E-nothing N/A
F-nothing N/A

I solved the problem of why I couldn't get the radio to work with a Motorola Talkabout (had to set the Talkabout code to zero--doh!)

I have a ton of real steel/military comms gear and wanted to pass along what works (no impedance issues) and what doesn't work (has impedance issues). Hopefully this along with the earlier posts will help someone.

First, here's a how to attach your U-229 to the PRC-148. Note, line up the flat part of the U-229 to the red dot on the radio's U283. (see photo)

jhg 583.jpg

Gently, firmly push down and gently try to turn the U-229 clockwise. You'll feel the sweet spot and it will lock into place. Taking the antenna off the radio makes this easier.

Here are the real steel/military comm items (not modified) you can use with the radio (pictured) without impedance issues (voice is clearly heard at normal volume):

jhg 580.JPG

jhg 581.JPG

--PRC-343 with Dual PTT ending in U-229 connector using Bowman headset (when receiving, voice does not come out of the PRC-148 speaker)
--Atlantic Signal Lo-Vis R23 earpiece & mic with MSA U94 (when receiving, voice does come out of the PRC-148 speaker--See fix noted in earlier posts)

The following will have impedance issues when you use real military PTTs ending in U-229 connectors (low voice transmit and receiving call comes through PRC-148 speaker):
-Nacre Quietpro+ MBITR Dual Urban
-MSA Sordin Supreme Pro with U94 PTT
-Invisio 5-Pin Lemo via PRC-343 PTT or Davies PTT
-Invisio 6-Pin Lemo via MSA Gallet Single Land Comm PTT

I also have a MSA GALLET Matching box I am working on. So far, I cannot get it to resolve impedance issues between the dynamic mics and the PRC-148. Any info on how to use the matching box (manual, advice) is greatly appreciated.

Thinking about biting the bullet and getting a TCI made PTT to resolve impedance issues. Honestly, I would rather put an amp in the radio. Anyone with knowledge on how to amp the radio internally please share.

Hope this helps someone.

:salute:

May 11th, 2013, 12:35	#477
Tracker33 Trader rating Join Date: Jan 2013 Location: North Carolina	I've got the newer "Deluxe" version of the United Star PRC-148. Purchased it from PX airsoft. It has the CCI sticker on the top. Wiring for U-283 is as follows: A-red/white stripe B-tan/brown stripe C-black D-white E-nothing N/A F-nothing N/A I solved the problem of why I couldn't get the radio to work with a Motorola Talkabout (had to set the Talkabout code to zero--doh!) I have a ton of real steel/military comms gear and wanted to pass along what works (no impedance issues) and what doesn't work (has impedance issues). Hopefully this along with the earlier posts will help someone. First, here's a how to attach your U-229 to the PRC-148. Note, line up the flat part of the U-229 to the red dot on the radio's U283. (see photo) jhg 583.jpg Gently, firmly push down and gently try to turn the U-229 clockwise. You'll feel the sweet spot and it will lock into place. Taking the antenna off the radio makes this easier. Here are the real steel/military comm items (not modified) you can use with the radio (pictured) without impedance issues (voice is clearly heard at normal volume): jhg 580.JPG jhg 581.JPG --PRC-343 with Dual PTT ending in U-229 connector using Bowman headset (when receiving, voice does not come out of the PRC-148 speaker) --Atlantic Signal Lo-Vis R23 earpiece & mic with MSA U94 (when receiving, voice does come out of the PRC-148 speaker--See fix noted in earlier posts) The following will have impedance issues when you use real military PTTs ending in U-229 connectors (low voice transmit and receiving call comes through PRC-148 speaker): -Nacre Quietpro+ MBITR Dual Urban -MSA Sordin Supreme Pro with U94 PTT -Invisio 5-Pin Lemo via PRC-343 PTT or Davies PTT -Invisio 6-Pin Lemo via MSA Gallet Single Land Comm PTT I also have a MSA GALLET Matching box I am working on. So far, I cannot get it to resolve impedance issues between the dynamic mics and the PRC-148. Any info on how to use the matching box (manual, advice) is greatly appreciated. Thinking about biting the bullet and getting a TCI made PTT to resolve impedance issues. Honestly, I would rather put an amp in the radio. Anyone with knowledge on how to amp the radio internally please share. Hope this helps someone. :salute: