Transponderz

List,
Am in the process of redoing the panel during the off season and currently shopping for a transponder. It would seem the best thing to do is purchase a unit with ADS-B functionality. This narrows the selection a bit. Are there any units to avoid? Should I wait and see what comes available with ADS-B implementation. I will also be installing a PF.
Thanks

Here in NL had to install the transponders already. Therefore we have some experience with them in terms of failure rate.
I do not own any transponder, but I heard from a reseller the following "ranking", from more reliable to less reliable:
1. Trig
2. Garrecht
3. Becker
4. Funkwerk/Filser

A nice feature of some units is a split accesspanel-radio unit.
You can then install the panel in front and the radio unit behind you, thus reducing long antenna cabling (and Rf crosstalk with other electronic wiring, like the radio).

On Thursday, October 25, 2012 10:14:28 AM UTC-6, K wrote:
List,

Am in the process of redoing the panel during the off season and currently shopping for a transponder. It would seem the best thing to do is purchase a unit with ADS-B functionality. This narrows the selection a bit. Are there any units to avoid? Should I wait and see what comes available with ADS-B implementation. I will also be installing a PF.

Thanks

I put a Trig TT21 in last summer and have been happy with it. It's also compact and simple to install, I put an AAE L2 antenna in the nose which is also easy and seems to work fine. The customer service is also top notch.

jim

I put a Trig TT21 in last summer and have been happy with it. It's also compact and simple to install, I put an AAE L2 antenna in the nose which is also easy and seems to work fine. The customer service is also top notch.



jim

Jim or others,

Does anyone know about any health risks by putting the antenna in close proximity to the pilot?

Thanks, John

I have heard the following statements:
- the effects of high-frequency radiowaves are unknown
- the amount of energy actually received by the body is very low due to the omni-directional antenna. The energy goes down by the law of the surface of a sphere.
- the minimum distance from the antenna should be 10cm (4 inches?)

On Friday, October 26, 2012 9:33:49 AM UTC-7, 3Y wrote:


I put a Trig TT21 in last summer and have been happy with it. It's also compact and simple to install, I put an AAE L2 antenna in the nose which is also easy and seems to work fine. The customer service is also top notch.







jim



Jim or others,



Does anyone know about any health risks by putting the antenna in close proximity to the pilot?



Thanks, John

This is covered in some depth by some papers published recently in Britain. The subject has to do with portable transponders for use in sport aviation there, these are handheld units which are expected in some cases to be carried in a pocket or worn on a harness. The conclusion of the tests was that as long as the antenna is farther than 8 or 10 inches, the hazard was acceptable by current occupational exposure rules, i.e., you would be allowed to experience that 8 hours a day.

On Friday, October 26, 2012 1:08:06 PM UTC-7, jfitch wrote:
On Friday, October 26, 2012 9:33:49 AM UTC-7, 3Y wrote:





I put a Trig TT21 in last summer and have been happy with it. It's also compact and simple to install, I put an AAE L2 antenna in the nose which is also easy and seems to work fine. The customer service is also top notch.















jim







Jim or others,







Does anyone know about any health risks by putting the antenna in close proximity to the pilot?







Thanks, John



This is covered in some depth by some papers published recently in Britain. The subject has to do with portable transponders for use in sport aviation there, these are handheld units which are expected in some cases to be carried in a pocket or worn on a harness. The conclusion of the tests was that as long as the antenna is farther than 8 or 10 inches, the hazard was acceptable by current occupational exposure rules, i.e., you would be allowed to experience that 8 hours a day.

I should add, I have an AEE dipole in the nose about 8 inches from my feet, but despite 200 watts tested radiated power from the Trig 21, it does not keep my feet warm...

I should add, I have an AEE dipole in the nose about 8 inches from my feet, but despite 200 watts tested radiated power from the Trig 21, it does not keep my feet warm...

Ive noticed a marked change in my sex drive with anything past 200 watts..
Seriously, to get back to the OP, I was thinking of a Trig for the ADS-b out capabilities and the PF for the ADS-B in. This way my set up will not become obsolete in a few years. Am I correct on this assumption?

Hi,

The bummer is that even though it is possible to connect a GPS up to the
Trig TT21 or TT22 an send ADS-B data out, the FAA says that is illegal.
They say you must use an approved GPS costing $3000+. I wish we could
convince the FAA that they are reducing safety dramatically by not allowing
any GPS to send data to the TT21/TT22.

Best Regards,

Paul Remde

"K" wrote in message
...





I should add, I have an AEE dipole in the nose about 8 inches from my
feet, but despite 200 watts tested radiated power from the Trig 21, it
does not keep my feet warm...

Ive noticed a marked change in my sex drive with anything past 200 watts..
Seriously, to get back to the OP, I was thinking of a Trig for the ADS-b out
capabilities and the PF for the ADS-B in. This way my set up will not become
obsolete in a few years. Am I correct on this assumption?

On Friday, October 26, 2012 6:39:14 PM UTC-4, Paul Remde wrote:

The bummer is that even though it is possible to connect a GPS up to the
Trig TT21 or TT22 an send ADS-B data out, the FAA says that is illegal.
They say you must use an approved GPS costing $3000+.

A quick list of the approved GPS position sensors and prices

Freeflight 1201 WAAS/GPS Sensor $2,919.00
Freeflight 1204 WAAS/GPS Sensor $6,889.00

Could not find prices for the NexNav sensors:
NexNav MINI WAAS/GPS Sensor
NexNav MAX WAAS/GPS Sensor

Is NexNav shipping these products?

Maybe the price will come down when more than one vendor is shipping approved products.