The pressure transducer in the TRIG is in the panel control unit -Trig
thought of that one.

The certification issue is a big one, because the bureaucracies that do
the specifying want to tie everything dowm to a tight spec., but only
consider what they have thought of. Intelligent solutions are not welcome
- it implies they didn't think.


There are often great reasons for a two box transponder. Including
being able to mount the RF box nearer the antenna and simplify cabling
and save RF power loss as the previous owner mentioned. However with
the need to plumb the transponder to a static line there may be
tradeoffs between static line and coaxial cable routing. You also get
to avoid RF coax cable flex and damage with gliders with front hinged
panels. The compact control head allows mounting in shallow panels,
takes weight off the panel mount screws etc.