According to my Omni 6+ manual, TX out generates a "closure to ground' (thru
transistor Q11) - My Centaur takes this "low" inverts it, and uses it to
apply base Bias to a transistor.- this closes a relay, (and turns on the
Amp. ) the relay closure (to ground thru 47 ohms) is sent back to 'TX EN"..
Looking at the Omni 6+ schem. this is what you get if you leave the
"shorting" plug in place between "TX OUT and TX EN"-notice "TX EN" has a
"Bar" over it--it wants to see a "low" to ground (thru 47 ohms)- before
allowing the Omni to transmit......this is to eliminate "hot switching".
Your Alpha must be placing a CONTINUOUS "low" on "TX EN" (or a
oltage) -this must be keeping the omni on Xmit..
What does the Alpha "c" output consist of?? --'73 JIm W. K1EXE
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