[MRCA] Retransmit

[W2HX]

Hey guys. I've been doing some research on interconnecting one of my harris HF units with my RF-1439 set up (VRC-89 I think).  The harris RF-5020 has this capability I have learned. J5 carries a retransmission key line output as well as 4 balanced audio signals. 2 RX audio and 2 TX audio. In addition, through menu options, I can set these audio levels to either 0 dBm or -10 dBm.  Interestingly, the PRC-138 does not seem to have a retransmission capability which is somewhat surprising.

As Ray noted, the 1439 does also have retransmit capability.  However, despite the millions of pages of various TMs I have on singcars, I cannot seem to find any technical details of the pin outs for the RXMT connector (6 pin) and what audio levels it is expecting. Anyone have technical details on this?  

Also, while I'm here, anyone know the MS connector number for J5 on the harris 5020? I looked in my operations and maintenance manuals and there was nothing.  I've already floated the question on the harris reflector.  

 
73 Eugene W2HX
 

-----Original Message-----
From: mrca-bounces at mailman.qth.net [mailto:mrca-bounces at mailman.qth.net] On Behalf Of Ray Fantini
Sent: Monday, August 27, 2012 9:07 AM
To: mrca at mailman.qth.net
Subject: Re: [MRCA] Retransmit


The URC family of radios (URC-100,101,104 and 110) all have retransmit connectors that allow two radios to be connected together. I have once set up a URC-104 on 51.0 to a URC-110 on 145.520 that provided a cross band platform. The 104 has a tone squelch decoder and when the radio receives tone it keys the transmitter. The 110 had a regular COS control line that keyed the 104. The cable has a number but do not know it off the top of my head but it was something that I built up using just the two cross band connectors and a five or six conductor cable. The big problem with trying to do anything on just low band is that you need two offset frequencies and no radio that operates in the tactical FM band will support this. My RT-1439 (VRC-88) SINCGARS while doing frequency hopping and all that other junk still won't operate on offsets. The URC family of radios will operate offsets but that was included for supporting satellite operation and accommodating the transponders offset. J  ust thinking about this would speculate that the amateur concept of using repeaters is unknown in tactical military radio? 
RF