| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 1316.1 | Try MEIS::FLYING (or KP-7) | N25480::FRIEDRICHS | Take the money and run! | Fri May 03 1991 08:45 | 10 |
| Are you referring to full scale airplane transponders? Or possibly
using transponders in models (hmmm, what would THAT do to ATC??).
Or some other application...
Since they are used in full scale flying, perhaps you could try
MEIS::FLYING
cheers,
jeff
|
| 1316.2 | | CSTEAM::BURSTALL | | Fri May 03 1991 13:42 | 11 |
| I can see it now
a 35 lb transponder hanging off the bottom of a Panic.
Drifting into the TCA of Logan
Doing a fly-by inverted of the tower.
The FAA stopping over the house for a "short dinner meeting"
Ken
|
| 1316.3 | Trans what? | KAY::FISHER | Stop and smell the balsa. | Fri May 03 1991 14:04 | 21 |
| >transponder
You guys have it all wrong. A Transponder is a guy
who puts your transmitter in the impound area.
Their easy to spot - frequently they dress like girls.
And they talk with a lisp.
Have you tried Cape Cod?
Bye --+--
Kay R. Fisher |
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| 1316.4 | RETRY | DBCIC1::DOOLEY | | Mon May 06 1991 06:50 | 11 |
|
Hello again,
I was not aware that they are used in Model planes,
but I am trying to develop an idea. Basically I would like to transmit
a signal to a Transponer, it would wake up and send a code back to
a reciever. I have no idea as to the size/price/availability of
this device or its transmission power relative to size. Again thanks
for the use of your conference.
John :-)
|
| 1316.5 | Still need more info | SNAX::SMITH | I FEEL THE NEED | Mon May 06 1991 09:11 | 12 |
| John,
Maybe we could help a little more if you gave us some hint as
to the idea your trying to develop. If you are, indeed, talking about
a full size transponder, then the flying conference would be your
best bet. The modeling industry does have, however, some miniture
electronic telemetry devices that might suit your needs if we knew
what those needs were.
Regards,
Steve
|
| 1316.6 | The idea | DBCIC1::DOOLEY | | Mon May 06 1991 10:19 | 11 |
|
The idea is this:
A transponder is fitted to a piece of equipment e.g a car. If
the car is stolen etc., the transponder would recieve a signal to
wake it up. Then a recieving station/stations would pick up this
signal and depending on which station recieved the signal from the
transponder first one could determine the rough location of the
car. Basically thats it. Thanks again for your interest.
:-) John
|
| 1316.7 | It's called the LOJACK system. | RGB::MINER | Dan Miner, DTN:225-4015, HLO2-1/J12 (@ H11) | Mon May 06 1991 10:37 | 17 |
| This has been available for about 5 (?) years as a commercial
product known as LOJACK. There is a transponder hidden in your car
that stays silent until it is "woken up" with a radio transmission.
Then, it begins broadcasting a signal that can be picked up with
recievers in state police cars. They can "zero in" on the stolen
car in a matter of minutes.
_____
| \
| \ Silent POWER!
_ ___________ _________ | Happy Landings!
| \ | | | | |
|--------|- SANYO + ]-| ASTRO |--| - Dan Miner
|_/ |___________| |_________| |
| / | " The Earth needs more OZONE,
| / not Castor Oil!! "
|_____/
|
| 1316.8 | And save 35% on your car theft coverage | ZENDIA::REITH | Jim Reith DTN 226-6102 - LTN2-1/F02 | Mon May 06 1991 10:42 | 6 |
| That sounds a lot like the LoJack system that we have here in
Massachusetts. The recieving stations are state police cruisers (the
ones with the 4 small antennas on the roof) and it is specifically
designed to locate stolen cars. Lots of success stories. The
transponder is hidden in one of about 20 places so it's time consuming
to disable it. Not too many details are public currently 8^)
|
| 1316.9 | Not a transponder, just a DF locator | POBOX::KAPLOW | Set the WAYBACK machine for 1982 | Mon May 06 1991 11:28 | 17 |
| There are numerous transmitters available that could be used to
locate a lost model, if that is your intent. The free flight
community uses them in many of their models. I'm aware of one that
weighs only 4 grams, and has a range of about � mile, but it costs
about $100.
For RC use, they could be much larger, and possibly set up to only
transmit when they no longer hear your TX signal. When the model
is lost, you turn off your TX, which would turn on the models TX.
I've also heard of audible buzzers being used in this manner; I
can speak form first hand experience as to how difficult it is to
find a model in a corn field even if you are 3 feet away from it!
The problem with all of this stuff is actually finding the model.
It requires lots of ground support equipment, and can give false
readings. Check with some local Ham "fox hunters" to see what it
takes to locate a hidden transmitter out in the field.
|