nuckolls.bob(at)cox.net
Guest
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 Posted: Tue Jan 15, 2008 8:35 am Post subject: KX-155 / KT-76A pin wiring & antennas |
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At 09:37 AM 1/14/2008 -0800, you wrote:
The data posted on my website was purloined from an
out of print publication called "Where the wires go",
the effort of an avionics technician that bothered to
compile and share his personal library of knowledge.
I have no way to confirm or deny the accuracy of these
drawings. Obviously, if the drawing differs physically
from what your particular equipment items show, then
the data are suspect and probably cannot be relied upon.
Suggest you visit an avionics shop on a small airport
and make friends with the owner. Years ago, I was
privileged to enjoy the friendship of one of the real
grey-beards in avionics. He had a library of data that
went all the way back to these wonderful products:
http://www.aeroelectric.com/Pictures/Radios/P1012765.JPG
http://www.aeroelectric.com/Pictures/Radios/P1012780.JPG
http://www.aeroelectric.com/Pictures/Radios/P1012763.JPG
I used to buy, refurbish and sell these radios back
in the days when I was the proud holder of a 1st
Class Radio Telephone License.
The radios you're wrestling with are not nearly so
dated . . . but finding useful data out in the wild
is becoming increasingly difficult. If you do find some
information that's more useful than what I've
published, I'd be pleased to receive some copies
which I will scan and make available to others.
| Quote: | Second question: I realize the transponder antenna should not be bundled
with other wires, but is it okay to bundle the COM and NAV antenna cables
with other wires?
|
There are no fundamentals in physics that recommend
separation of wires between potentially antagonistic
systems. There are two purposes for DO-160 testing
against a TSO document for TC aircraft appliances.
(1) make sure the device performs as advertised and
(2) relieve the installer from making concessions
to one system versus another system for happy
coexistence in an airplane.
Folks who experienced success at eliminating
interference by repositioning wires have only
succeeded in masking the root cause of a
problem. The practice of sorting wire bundles
as a prophylactic against interference problems
is not an industry practice.
Bob . . .
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