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Trig TY91

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riddon(at)sent.com
Guest

Posted: Mon Apr 10, 2017 2:02 am Post subject: Trig TY91

I am just about to finally bite the bullet and order an 8.33 mhz radio. I currently have a Microair 760 and favour the Trig TY91 as a direct replacement. Has anyone made the transition from Microair to Trig TY91? If so what are the pitfalls to beware of. From trawling the web I see that Bournemouth Avionics seem to be offering the Trig at a good price. Anyone used this company?



Richard Iddon.



G-RIXS

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pete(at)lawless.info
Guest

Posted: Mon Apr 10, 2017 2:22 am Post subject: Trig TY91

Hi Richard



Made the change 12 months ago.  Excellent choice and having the ability 

to listen on 2 frequencies at the same time is really useful.



Only issue with the install was that I had to run a third wire to the 

headset jacks.  Bit of a pain as my headset jacks are in the rear roof 

panel.  This may have been required because the original installation 

used a separate intercom, which has now been removed.



No knowledge of Bournemouth Avionics.



Regards



Pete



G-RMAC Europa #109

On 10/04/17 11:00, Richard Iddon wrote:

 	  Quote: 	
		   



 I am just about to finally bite the bullet and order an 8.33 mhz radio. I currently have a Microair 760 and favour the Trig TY91 as a direct replacement. Has anyone made the transition from Microair to Trig TY91? If so what are the pitfalls to beware of. From trawling the web I see that Bournemouth Avionics seem to be offering the Trig at a good price. Anyone used this company?



 Richard Iddon.



 G-RIXS

- The Matronics Europa-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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brian.davies(at)clara.co.
Guest

Posted: Mon Apr 10, 2017 4:01 am Post subject: Trig TY91

Hi Richard



The pitfalls depend on the existing configuration and your intentions.  As

you know the Trig has a good built in intercom so no need to worry about

getting connection to an existing Intercom right.  The biggest complication

I came across with an existing installation without an intercom is that many

PTT switches are simply wired in parallel. The TY91 has a priority circuit

so that if both crew try to transmit at the same time it gives P1 override

powers.  This means the PTT switches have to be separately wired.  Not a

problem electrically but often a pain because of the access to the stick

wiring. If you intend to keep your existing  intercom the Trig wiring

diagrams helpfully explain the connection requirements for a small range of

intercoms.  If yours is not on the list you are on your own but gives you

the general idea. Trig themselves are very helpful if you hit any

installation snags.



The TY91 has a separate control head so that you can mount the main unit in

a supplied tray anywhere that is convenient.  This is OK with a new

installation but finding somewhere to mount it on a Europa is a bit of a

puzzle and can involve lots of wiring changes because of the physical

location of the main unit being very different to the standard fit on the

panel.



Mendelsons  normally offer to make a loom for you but current demand

precludes that unless you are prepared to wait a long time.  They will,

however, supply the wiring in lengths you want FOC.

Good luck!



Brian G-DDBD



--

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peterz(at)zutrasoft.com
Guest

Posted: Mon Apr 10, 2017 8:16 am Post subject: Trig TY91

My ty91 is awesome. No issues, excellent radio



Cheers,

Pete



 	  Quote: 	
		   On Apr 10, 2017, at 6:00 AM, Richard Iddon <riddon(at)sent.com> wrote:

 

 

 

 I am just about to finally bite the bullet and order an 8.33 mhz radio. I currently have a Microair 760 and favour the Trig TY91 as a direct replacement. Has anyone made the transition from Microair to Trig TY91? If so what are the pitfalls to beware of. From trawling the web I see that Bournemouth Avionics seem to be offering the Trig at a good price. Anyone used this company?

 

 Richard Iddon.

 

 G-RIXS

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Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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riddon(at)sent.com
Guest

Posted: Mon Apr 10, 2017 9:36 am Post subject: Trig TY91

Hmm! Installation could be a problem then. I fitted a Trig transponder a while ago and struggled to find a place for the main unit for that. Anyone got any other recommendations for a one piece radio which will fit in my existing 2 1/4 inch hole. I already have an intercom. I note Mendelssohns offer FUNKE and Dittel which would appear to do the job. Any feedback on these units?



Richard Iddon



G-RIXS



[quote] On 10 Apr 2017, at 13:00, Brian Davies <brian.davies(at)clara.co.uk> wrote:

 

 

 

 Hi Richard

 

 The pitfalls depend on the existing configuration and your intentions.  As

 you know the Trig has a good built in intercom so no need to worry about

 getting connection to an existing Intercom right.  The biggest complication

 I came across with an existing installation without an intercom is that many

 PTT switches are simply wired in parallel. The TY91 has a priority circuit

 so that if both crew try to transmit at the same time it gives P1 override

 powers.  This means the PTT switches have to be separately wired.  Not a

 problem electrically but often a pain because of the access to the stick

 wiring. If you intend to keep your existing  intercom the Trig wiring

 diagrams helpfully explain the connection requirements for a small range of

 intercoms.  If yours is not on the list you are on your own but gives you

 the general idea. Trig themselves are very helpful if you hit any

 installation snags.

 

 The TY91 has a separate control head so that you can mount the main unit in

 a supplied tray anywhere that is convenient.  This is OK with a new

 installation but finding somewhere to mount it on a Europa is a bit of a

 puzzle and can involve lots of wiring changes because of the physical

 location of the main unit being very different to the standard fit on the

 panel.

 

 Mendelsons  normally offer to make a loom for you but current demand

 precludes that unless you are prepared to wait a long time.  They will,

 however, supply the wiring in lengths you want FOC.

 

 

 Good luck!

 

 Brian G-DDBD

 

 --

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Roland

Joined: 30 Nov 2009
Posts: 334
Location: EDLE

Posted: Tue Apr 11, 2017 12:39 am Post subject: Re: Trig TY91

I have a Dittel KRT 2, bought in 2013 and I'm satisfied with it (incidentally it is also very lightwight).



However the handling is not everyones cup of tea, but for my brain it's okay  The Dittel is also equipped with dual watch.



Regards

Roland

PH-ZTI

XS TG 914

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italianjon

Joined: 05 Aug 2015
Posts: 68

Posted: Sat Apr 15, 2017 1:43 am Post subject: Re: Trig TY91

I'm currently installing the TY91 into a new panel.



Because I had to do both the Mode S and 8.33 I decide to start a panel from scratch.



I haven't used the Trig equipment "in vane" yet, But from the installation point of view, very easy.



I did select it for three main reasons. Firstly I preferred the user interface to the others, secondly the control heads do allow for very flexible installations, and thirdly, the integrated intercom, removes the need for a separate piece of kit.



I am trying to find a window of a few days in the next weeks to install the panel, and complete the last bits of wiring. I need to install an RDAC to run MGL EFIS/EMS in addition. I can report back once I have done the final fit to the aircraft.

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Scudrunner

Joined: 31 Aug 2012
Posts: 26

Posted: Wed Apr 19, 2017 4:50 am Post subject: Re: Trig TY91

Another thing to be aware of with Trig, is that the Sub D connectors supplied have crimp terminals. This makes wiring between the control unit and radio very clean and easy relative to (my) soldering. But the cost of the Mil Spec crimping tool is eye watering! (yes I have a little used one for sale now!). I do think the Trig installation manuals are very comprehensive.



I made up a tray which copied the physical dimensions of my old avionics sub-panel (Trig radio and transponder). In photo, head units are at the bottom (can't see them very well), followed by a row of circuit breakers and the scrappy bit on top is the power supply for the GPS (must put it in it's own little box). PL1 is the same interface to my intercom as existed in the old avionics sub panel.

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