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  #11  
Old 01-03-2017, 12:58 PM
Canadian_JOY Canadian_JOY is offline
 
Join Date: Aug 2007
Location: Ontario, Canada
Posts: 1,120
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Just a quick word on "watts"... While manufacturers like to make big noise about transmitter power, the reality is that receiver sensitivity is of FAR greater importance. Of course transmitter power and receiver sensitivity are totally meaningless numbers without an optimal antenna installation. A 10W transmitter tied to a crappy antenna installation isn't going to get you any better communication than a 6W transmitter with a well-optimized antenna installation.

Don't get wrapped around the axle when it comes to transmitter power. For most of what we're doing, 6W is plenty enough.

As for Trig, if you think the support you get from Mid Continent is great (which it is!), try talking to the Trig factory folks in Scotland. Truly outstanding service.
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  #12  
Old 01-03-2017, 02:11 PM
jliltd jliltd is offline
 
Join Date: Sep 2013
Location: Farm Shack, TX
Posts: 106
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Rv8ch,

Yes, the TY92 does provide for 16 watts. But it is strictly a 24 volt installation. So no TY91 for me.

Canadian Joy provides sage advice on transmitter wattage ratings. A well designed blade antenna, coax type and connectors and low-impedance ground plane bonding are the most important items for good successful transmit and receive range. Many times it's the receiver sensitivity and audio quality that we as pilots can take on a personal level and in many cases matter more than transmit range. Also, look closely at the fine print on wattage ratings as there are "max" values and RMS values. There can be complications to some of the higher wattage transmitters out there like more distance required between airframe antenna locations and/or splitting locations between top and bottom of airframe to avoid bleed over interference. There will be more EMI in the aircraft for the balance of the components to have to deal with and if the transmitter doesn't have tight performance specifications it can get down right nasty. Imagine being able to check your ammeter by looking at it when you press the PTT and the transmitter whacks your PC680 or EarthX.

So like the Rolling Stones might say, when it comes to transmit watts in the glossy brochures, sometimes it's better to get just what you need and not what you want. Or think you want.

Always go for a quality vs quantity when it comes to comms.

Jim

Quote:
Originally Posted by rv8ch View Post
Thanks for the writeup, Jim. Assuming you wire it up correctly to a good antenna, you feel that the 6 watts put out by the TY91 will be enough? Mainly curious since they also have the TY92 at 16 watts, the SL40 has 8 watts, and the GTR-200 has 10 watts.
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Last edited by jliltd : 01-03-2017 at 02:16 PM.
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  #13  
Old 01-03-2017, 03:47 PM
rv8or rv8or is offline
 
Join Date: Oct 2007
Location: Norwich England
Posts: 124
Default Trig radio & transponder

I have both in my RV3A, boxes under the forward floor between the rudder pedals and the small remote heads in a sub panel.
With the fuel tank in the fuse with little space behind the panel this arrangement works really well.
More importantly is the performance of the radio, it is best I have ever used.

Transponder works well, and easy to operate.

As always just my opinion

Rob
RV3A G-BVDC
1/14th share in L4 Cub
Very Very slow build RV 8
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  #14  
Old 01-03-2017, 04:11 PM
rv8or rv8or is offline
 
Join Date: Oct 2007
Location: Norwich England
Posts: 124
Default Trig radio & transponder

I have both in my RV3A, boxes under the forward floor between the rudder pedals and the small remote heads in a sub panel.
With the fuel tank in the fuse with little space behind the panel this arrangement works really well.
More importantly is the performance of the radio, it is best I have ever used.

Transponder works well, and easy to operate.

As always just my opinion

Rob
RV3A G-BVDC
1/14th share in L4 Cub
Very Very slow build RV 8
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  #15  
Old 01-04-2017, 01:31 PM
dj45101 dj45101 is offline
 
Join Date: Dec 2016
Location: Jacakson
Posts: 4
Smile Trig radio & transponder

Thank you all for the reply's. With all positives and no neg. I guess I now know the way to go.
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