Wanted: Transponder antenna

I'm starting the fabrication of a new boot cowl for the Champ project. The
transponder antenna got wiped off the bottom during the groundloop (no, I
didn't do it!), so I gotta get a new one.

I've seen the 'bargain' version in AS&S for $22 or so. Are they useful, or
should I spend the ~$60 for a decent one?

Anybody have one laying around that they no longer need?

Jon B.

"Grandpa B." never.mind wrote:

I'm starting the fabrication of a new boot cowl for the Champ project. The
transponder antenna got wiped off the bottom during the groundloop (no, I
didn't do it!), so I gotta get a new one.

I've seen the 'bargain' version in AS&S for $22 or so. Are they useful, or
should I spend the ~$60 for a decent one?

Anybody have one laying around that they no longer need?

Jon B.



I'll give you one anecdotal data point. I bought the $22 "TED"
transponder antenna from Aircraft Spruce a few years back. It seemed
well constructed and my transponder signal is apparently getting out
as I've had no complaints of dropouts from ATC.

David O -- http://www.AirplaneZone.com

There is nothing wrong with the $22 one. Only for fast birds,
you may want an aerodynamic shaped one.
Composite projects can even build the $22 jobs into wings, etc.

"Grandpa B." never.mind wrote in message ...
I'm starting the fabrication of a new boot cowl for the Champ project. The
transponder antenna got wiped off the bottom during the groundloop (no, I
didn't do it!), so I gotta get a new one.

I've seen the 'bargain' version in AS&S for $22 or so. Are they useful, or
should I spend the ~$60 for a decent one?

Anybody have one laying around that they no longer need?

Jon B.

"Paul Lee" wrote in message
m...
There is nothing wrong with the $22 one. Only for fast birds,
you may want an aerodynamic shaped one.
Composite projects can even build the $22 jobs into wings, etc.

Hey! Don't forget us wood and fabric types. I was going to install mine
under my seat, but then I thought about possible radiation effects on the
family jewels. I mentioned this to my wife who poo-pooed my concern. So I
put it under her seat.

Rich S.

"Rich S." wrote:


Hey! Don't forget us wood and fabric types. I was going to install mine
under my seat, but then I thought about possible radiation effects on the
family jewels. I mentioned this to my wife who poo-pooed my concern. So I
put it under her seat.

Rich S.

My transponder antenna is under my Long EZ pilot seat under an
aluminum ground plane disk with aluminum foil glued to the underside
of the seat as added protection for the "jewels". I don't know how
effective the shield is but I'm out of the kid making biz anyway
(hopefully).

David O -- http://www.AirplaneZone.com

I was going to install mine
under my seat, but then I thought about possible radiation effects on the
family jewels. I mentioned this to my wife who poo-pooed my concern. So I
put it under her seat.

Rich S.
++++++++++++++++++++++++++++++

Any new additions to the family since?



Barnyard BOb

"- Barnyard BOb -" wrote in message
...


I was going to install mine
under my seat, but then I thought about possible radiation effects on the
family jewels. I mentioned this to my wife who poo-pooed my concern. So I
put it under her seat.

Rich S.
++++++++++++++++++++++++++++++

Any new additions to the family since?

No, but after a long cross-country, I can use her as a night light. ;o)

Rich S.

AFAIK the tranponder antenna should be 8+ feet away from warm bodies.

"Rich S." wrote in message ...
"Paul Lee" wrote in message
m...
There is nothing wrong with the $22 one. Only for fast birds,
you may want an aerodynamic shaped one.
Composite projects can even build the $22 jobs into wings, etc.

Hey! Don't forget us wood and fabric types. I was going to install mine
under my seat, but then I thought about possible radiation effects on the
family jewels. I mentioned this to my wife who poo-pooed my concern. So I
put it under her seat.

Rich S.

And where would you be getting that information from? Don't know many small
single engine airplanes that would meet that requirement.

Jerry

Paul Lee wrote:
AFAIK the tranponder antenna should be 8+ feet away from warm bodies.

"Rich S." wrote in message ...

"Paul Lee" wrote in message
. com...

There is nothing wrong with the $22 one. Only for fast birds,
you may want an aerodynamic shaped one.
Composite projects can even build the $22 jobs into wings, etc.

Hey! Don't forget us wood and fabric types. I was going to install mine
under my seat, but then I thought about possible radiation effects on the
family jewels. I mentioned this to my wife who poo-pooed my concern. So I
put it under her seat.

Rich S.

Sorry. Don't remember the source. Had it when I was installing the
antenna. Suppose I could find it if I spend hours of searching,
but don't have time for it now - just remember it off hand.

But I think the 8+ feet refers to the body being in direct
path of the radiation pattern. If you place it in such a way that your
body is on the other side of the ground plane or on other side of a metal
shield you should be OK.

Jerry Springer wrote in message thlink.net...
And where would you be getting that information from? Don't know many small
single engine airplanes that would meet that requirement.

Jerry

Paul Lee wrote:
AFAIK the tranponder antenna should be 8+ feet away from warm bodies.

"Rich S." wrote in message ...

"Paul Lee" wrote in message
. com...

There is nothing wrong with the $22 one. Only for fast birds,
you may want an aerodynamic shaped one.
Composite projects can even build the $22 jobs into wings, etc.

Hey! Don't forget us wood and fabric types. I was going to install mine
under my seat, but then I thought about possible radiation effects on the
family jewels. I mentioned this to my wife who poo-pooed my concern. So I
put it under her seat.

Rich S.