[Elecraft] K3: Smart PTT for transverter??

[Alexandr Kobranov]

Hi Paul,

I was investigated little bit this (as not fully satified by KEY OUT 
functionality). Looking to schematics of KXV board there some levels 
like related to TX/RX... Seems to be possible to derive some PTT or 
+TX driver from such signals on this board and put some RCA port to 
the rear panel  (to the cover instaed of fan unit - talking about 
K3/10). But this is to be very carefuly tested and now only as idea 
(maybe some f/w change of KEY OUT will be faster than this 
investigation...).
But basic possibility (and without touching internal signals) is to 
use band/trns mapping on 15pin ACC port - simply make transverter PTT 
disabled/enabled based on band or trns data on this port.
Or you can use only pin #7 in XVTR ON, hope this is on in XVTR mode 
only, not tested!

Let us know your experience,

73!
Lexa, ok1dst
K3/10 #727


paul.bradbeer2 at ntlworld.com napsal(a):
> I use my K3 predominantly for 6m and to drive my 2m transverter (not an XV144).  I'm having great fun with it but would like to do a 'smart PTT' for the 2m transverter - i.e. only when the Band Up switch has selected the Transverter.  
> 
> At the moment, with the transverter in standby, and me operating on 6m, everytime I transmit it operates the PTT to the transverter too.  Has anyone found a way of using the commands on the ACC connector, so that PTT to the transverter will only be activated when the transverter band has been selected by the K3??
> 
> Grateful for any suggestions..
> 
> Paul M0CVX
> 
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