[MRCA] HF/VHF Cross band retranse

[Dennis]

Yes, it is a pretty easy task to 
use the retranse function of the PRC-25 family radios, especially cross 
band. The hardest part in an HF/VHF cross band system is keying of the 
VHF component by the HF. HF radios with a squelch system, especially 
portable ones, are not very common. The GRC-106, as well as the R-392, 
have a squelch intended for this purpose, though they are not a very 
good. An outboard device was built for use the PRC-74 & PRC-104. This was the AM-7152(Fair has um). Opinions on how well the audio derived squelch worked differ but are generally favorable.


The original retranse cable for the PRC-25 is rather rare & it's not 
just a cable that's cross-wired. It has some diodes in it for isolation 
& RF filtering(which is of major concern).

The Marines thought to eliminate some of the guess work in portable 
retranse systems utilizing the C-7673/PCC-1 which is surprisingly not 
uncommon.

With late model equipment the ability to utilize cross band retranse is 
greatly simplified, especially with Harris equipment. KM6AB once checked in to our nightly 40 meter net from the shower using his RF-5020 & 
one of those Personal Radio sets(PRC-343?) which are pretty much 
worthless for anything other than the wireless mic application Mike had 
applied it to. Most Marine, commercial, & para-military, HF set have very effective syllabic squelch systems that would be adaptable to cross band retranse switching.

Please note that I deleted the about 15 pages of previous message trail, & modified the subject line, to more reflect the message content before sending this message. HINT!

 Dennis Starks
Military-Radio-Guy
KBØSFP
HFpack/Milpack Monitor(all USB):
3996, 5357, 7296, 14342.5, 18157.5

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