[Elecraft] K3: TX-INH help please

KD7YZ Bob kd7yz at denstarfarm.us
Tue Apr 30 12:53:03 EDT 2013


Howdy K3' people:

I am a dummy as I can not quite figure this one out.

I hav a 2m LNA, the SSB-MHP-145, which MUST be switched out before any
RF. The LNA does not have RF sensing.

I use an SSB-ACS-2004 and an SSB-DCW-2004b, the latter of which runs the
necessary 12v to the MHP-145 when the DCW-2004 is keyed/grounded on
Pin-3.

So I would like to make use of the K# and TX-Inhibit that I have heard
so many mention. However, page 11 of the K3 tells me that pin-7 of the
Daisy-Chain from K3 to the transverters can activate TX-Inhibit if Pin-7
is grounded.

To me, that's not a Toggle, it's a steady state until Pin-7 is released.

So all the time I am receiving/listening, TX-H must be activated.

The DCW-2004 does not apply output to one of four pins until the
DCW-2004b is keyed by ... something, a foot-switch; a PTT output from
the K3, or something.

I therefore erroneously conclude that nothing is holding TX-INH active
until the DCW-2004 sequencer is itself keyed.

Therefore I have to ask anyone using TX-INH to guide me through this
confusing process.

Kinda specialized, however I hope somebody is using it like I wish to
do.

thanks in advance




-- 
73
KD7YZ Bob
http://www.qrz.com/db/KD7YZ



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