peter-h
Line Up and Wait
It lives under my RHS front seat.
There are two connectors, both at one end. One is like a DB37 though I have not counted the pins. The other is a BNC with RG400 cable going into it.
http://www.zen74158.zen.co.uk/temp-files-ph/converter.jpg
I ask because following an avionics test, it was discovered that NAV1 VOR information shows incorrectly on the HSI, but shows correctly on the KI-229 RMI which is switchable NAV1/NAV2. Also, NAV1 LOC/GS displays fine on the HSI. So the problem cannot be the NAV1 radio (a KX155A) itself; it must be something driving just the B/King HSI.
This problem has existed for a long time in that I occassionally saw strange behaviour on NAV1 VOR but remained unchecked because I use the HSI with GPS only.
The avionics man thinks the box is a KN72 converter and is the cause of the problem, but looking at images on the internet a KN72 has different connections on it.
I have the 2006 ATP CD for the TB20 aircraft but unfortunately do not have any details of what is actually installed in my aircraft.
The box might also be something to do with a KI-229 RMI which I had installed as a factory option...
The HSI fault shows up as:
As the injected signal is reduced (via a direct cable connection) at about -90db the HSI deviation bar and the to/from flag goes walkabout, but the Invalid flag doesn't come into view until -115db.
Obviously, the Invalid flag should be visible before the deviation bar or the to/from flags start to show rubbish.
NAV2 is fine, dropping the flag into view at -115db also.
This goes to prove that a VOR receiver cannot be trusted as the anti-GPS lobby here in Europe would make one believe
There are two connectors, both at one end. One is like a DB37 though I have not counted the pins. The other is a BNC with RG400 cable going into it.
http://www.zen74158.zen.co.uk/temp-files-ph/converter.jpg
I ask because following an avionics test, it was discovered that NAV1 VOR information shows incorrectly on the HSI, but shows correctly on the KI-229 RMI which is switchable NAV1/NAV2. Also, NAV1 LOC/GS displays fine on the HSI. So the problem cannot be the NAV1 radio (a KX155A) itself; it must be something driving just the B/King HSI.
This problem has existed for a long time in that I occassionally saw strange behaviour on NAV1 VOR but remained unchecked because I use the HSI with GPS only.
The avionics man thinks the box is a KN72 converter and is the cause of the problem, but looking at images on the internet a KN72 has different connections on it.
I have the 2006 ATP CD for the TB20 aircraft but unfortunately do not have any details of what is actually installed in my aircraft.
The box might also be something to do with a KI-229 RMI which I had installed as a factory option...
The HSI fault shows up as:
As the injected signal is reduced (via a direct cable connection) at about -90db the HSI deviation bar and the to/from flag goes walkabout, but the Invalid flag doesn't come into view until -115db.
Obviously, the Invalid flag should be visible before the deviation bar or the to/from flags start to show rubbish.
NAV2 is fine, dropping the flag into view at -115db also.
This goes to prove that a VOR receiver cannot be trusted as the anti-GPS lobby here in Europe would make one believe