[Elecraft] K3's Transmit Inihibit function (TX INH)

Jerry.Van jerry.van at sbcglobal.net
Sun Dec 23 13:55:14 EST 2007


Sorry about what may be my confusion about this option but I've been 
following this thread and previous threads concerning the use of TX INH 
to support the use of keying loops provided by many amps.  My amp 
provides for the use of a keying loop and I would like to continue to 
use the loop function whenever my own K3 arrives.  Wayne's description 
of the latest firmware makes me wonder if it can be used as part of a 
keying loop.  Here is what I understand from what he has posted.

The TX INH menu can be set to HI=INH (a logic 1 inhibits transmit) to 
accommodate the low signal that is passed thru the amplifier when it is 
ready to be hit with RF.  Sounds good so far but then Wayne goes on to 
say that when the K3 is in its inhibit state "Using transmit-start 
switches (XMIT, TUNE, ATU, M1-M4) results in a brief "TX INH" message on 
VFO B. The key, keyer paddle, /PTT, and TX via PC commands are all then 
nonfunctional."    In addition " the TX LCD icon flashes slowly".  If 
all of these functions are inhibited then there is no way to start the 
keying sequence and to send a keying signal to the input of the amp's 
keying loop.

Am I missing something here?  As currently implemented it does not 
appear to me that the TX INH will allow the use of a keying loop for our 
amps.  But I can well envision its use in a multi-setup where a 'hard' 
inhibit is desired.

Jerry  N8BM 



More information about the Elecraft mailing list