TDR-90 replacement?
Thread Starter
TDR-90 replacement?
looking for sensible replacement option for existing TDR-90 transponder to enable us to satisfy Elementary Helicopter Mode S regulations.
Current use is for destinations inside designated airspace but generally operating outside CAS with occasional overseas trips to Europe.
Current fit is 2xTDR-90 controlled by CTL-92.
Would like to keep with TDR range but price looks silly for replacement - especially when so many other systems around but - as ever - panel space is priority - hence wish to keep current control head.
Would appreciate suggestions.
AS365N1
Current use is for destinations inside designated airspace but generally operating outside CAS with occasional overseas trips to Europe.
Current fit is 2xTDR-90 controlled by CTL-92.
Would like to keep with TDR range but price looks silly for replacement - especially when so many other systems around but - as ever - panel space is priority - hence wish to keep current control head.
Would appreciate suggestions.
AS365N1
Join Date: Nov 2007
Location: Too close to EASA
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TDR90 replacement
No cheap solution if you want to keep a CTL-style controller. You'd have TDR94 with CTL92E, but also a big bill!
Try a Becker BXP6401 transponder fitted in place of the CTL92 - that's all you need. Wire to existing antenna and altitude encoder. The transponder has a dongle (programming module) that plugs into an additional connector to store the Mode S address, so you don't have to re-programme if swapping a faulty unit. You should allow for squat switch input - JAA TGL13 for ELS is shortly going to be replaced with an new EASA AMC which will make this a mandatory requirement - either a squat switch or an airspeed switch for automatic GND mode operation.
We've done this Becker mod a A109's where CTL was mounted in the glareshield panel. It works very well.
Regards
Try a Becker BXP6401 transponder fitted in place of the CTL92 - that's all you need. Wire to existing antenna and altitude encoder. The transponder has a dongle (programming module) that plugs into an additional connector to store the Mode S address, so you don't have to re-programme if swapping a faulty unit. You should allow for squat switch input - JAA TGL13 for ELS is shortly going to be replaced with an new EASA AMC which will make this a mandatory requirement - either a squat switch or an airspeed switch for automatic GND mode operation.
We've done this Becker mod a A109's where CTL was mounted in the glareshield panel. It works very well.
Regards
Thread Starter
Mode S option
Wigglyamp
Thanks for that.
After some more background reading - your solution sounds ideal as we should have enough room in console to slot one in.
Avionic guys are looking at it......
Would like to keep dual transponder capability although I appreciate units have better reliability these days.
currently measuring console for space!
Thanks for that.
After some more background reading - your solution sounds ideal as we should have enough room in console to slot one in.
Avionic guys are looking at it......
Would like to keep dual transponder capability although I appreciate units have better reliability these days.
currently measuring console for space!
Join Date: Nov 2007
Location: Too close to EASA
Posts: 408
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Dual transponder
I gave some thought to a dual transponder system using the Becker. How about this:
"BXP 6402-Remote (Class II): Mode-S-Transponder 2 1/4 '' mount:
Remotely controlled by Control-Unit CU6401-1-(01). Extremely small and compact; directly exchangeable with ATC4401 (same dimensions and connectors), Software to DO178 B Level C Class II Level 2 es, for VFR/IFR operation up to 15.000 feet. Standard input for Blind-Encoder, parallel and serial RS 232/422. Address Module AM6400-1-(01) required."
The BXP6402 can be found in Becker's Primeline range, rather than the Compact range which has the BXP6401.
Use two remote units and a single controller with appropriate external switching for the RS422 control lines - in effect the same as using dual TDR90/94's with a single CTL92/E.
Regards
Wigglyamp
"BXP 6402-Remote (Class II): Mode-S-Transponder 2 1/4 '' mount:
Remotely controlled by Control-Unit CU6401-1-(01). Extremely small and compact; directly exchangeable with ATC4401 (same dimensions and connectors), Software to DO178 B Level C Class II Level 2 es, for VFR/IFR operation up to 15.000 feet. Standard input for Blind-Encoder, parallel and serial RS 232/422. Address Module AM6400-1-(01) required."
The BXP6402 can be found in Becker's Primeline range, rather than the Compact range which has the BXP6401.
Use two remote units and a single controller with appropriate external switching for the RS422 control lines - in effect the same as using dual TDR90/94's with a single CTL92/E.
Regards
Wigglyamp
