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

[Joe Subich, W4TV]

Wayne, 

Very good!  For the record the K3 ACC output be mapped to the 
Yaesu "Band data" Jack as follows: 

 Function            K3         Yaesu 
                   DB15HD      DIN8/262
------------------------------------------------------
  +13               n/a           1
  TX Gnd             10           2
  Ground            5,12          3
  Band A             13           4
  Band B              3           5
  Band C              9           6
  Band D             14           7
  Inhibit/~Enable     7           8  (low to tx) 
  
Note: unless the pin 7 of the K3 ACC connector includes an internal 
pull-up, it will be necessary to provide an external pull-up (10K 
to +5V (max) source).  

This should be useful for the large number of accessories (both 
commercial and home built) that are compatible with the Yaesu 
"Band Data" interface. 

Any progress on an input that places the K3 into low power transmit 
(programmable level) for setting a RF activated remote tuner or 
amplifier/tuner like the Quadra, PW1, etc.? 

73, 

   ... Joe, W4TV 
 



> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net 
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of wayne burdick
> Sent: Thursday, December 20, 2007 12:40 PM
> To: Elecraft Reflector
> Subject: [Elecraft] K3's Transmit Inihibit function (TX INH)
> 
> 
> Hi all,
> 
> I've just added the TX INH function and its associated menu entry to 
> the K3. Just in case you have no clue what this is: it provides a way 
> for an external station controller to determine which of two or more 
> transceivers can have access to resources such as an amplifier. It's 
> typically used in multi-op contest situations.
> 
> By popular demand, the TX inhibit level can be *either* active-low or 
> active-high. Thus the TX INH menu entry has three settings:
> 
>     OFF     (no TX inhibit)
>     LO=INH  (a logic 0 inhibits transmit)
>     HI=INH  (a logic 1, 5 V, inhibits transmit)
> 
> I'm testing this feature right now, and it should be in the next 
> production firmware release.
> 
> 73,
> Wayne
> N6KR
> 
> ---
> 
> http://www.elecraft.com
> 
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