Peter wrote:
KT_74_software_upgrade_v3_12_pdf
KT_74_IM_pdf
Btw. Someone have maybe this latest software fro KT74?
Check your email 
Reactivating this thread
1. I bought my aircraft complete with a Trig TT31 (with the awful Twist and push interface)
2. I added ADSB out with a certified Trig TN72 – installed by an avionics workshop – all worked fine for 3+ years
3. Trig keep promising a new model Transponder with push buttons instead of the twisty turney knob. It’s a “secret” project which gets delayed
4. After waiting for Trig for 2-3 years to produce this promised vapourware, 2 weeks ago, I purchased a King KT74 (made by Trig with a better GUI – buttons! – but a worse display!)
I slid it into the tray fine. It all works except it is not picking up the GPS data.
All of the baud settings etc seem correct but my King KT74 doesn’t see to work with the Trig position source in spite of my avionics retailer promising it was “pin for pin” identical
There is plenty of info on the Trig TT31. I am struggling to find the King installation manual with the pins on the sockets
Any help welcome!
Peter wrote:
one can’t quite assume the I/O on the back will be the same
No, but looking at the IM’s for the two units it does look identical – except for how the RS232 #1 in/out is labeled in the King IM.
Since the front panel PCBs are different, one can’t quite assume the I/O on the back will be the same.
Anyway, manuals are above
RS232 is just an interface, and can be used for various protocols (data streams) e.g. TIS, GPS NMEA, etc.
tmo wrote:
That’s why I was wondering why Przemek expected to find altitude on RS232 on the King if the Trig didn’t have it.
The Trig unit does have two RS232 inputs (and outputs). So does the King unit, but the King IM calls one of the inputs “GPS input” and one of the outputs “TIS output” and not RS232 in/output. It is likely that the firmware in the King unit is different from that in the Trig unit so King might have restricted the use of these particular inputs/outputs.
I thought so, Airborne, thanks for confirming. That’s why I was wondering why Przemek expected to find altitude on RS232 on the King if the Trig didn’t have it.
tmo wrote:
Is there any actual difference between the King and Trig units, in terms of capability?
Comparing the TT31 and KT74? They are the same unit – only with a different set of controls. (The TT31 has a rotary knob for code entry while the KY74 has 0-7 buttons.)
Is there any actual difference between the King and Trig units, in terms of capability?
Ha, thanks!
