Found, Estes Sonic Locator.

[scadaman29325]

Found another box of old rocket stuff from my first stint with LPR. Never did it as a kid. Bought this back in 2003-4 timeframe. I'm pretty sure it needs an A23.

 

[neil_w]

Hey, I never knew they made those, looks like a nice little package.

What's the big grey thing?

 

[scadaman29325]

It's a directional microphone, came with a set of headphones. Sweep the area and listen for the loudest direction, then start walking/hunting. I'm glad I didn't leave the battery in it to leak and corrode everything.

 

[solid_fuel]

It's a directional microphone, came with a set of headphones. Sweep the area and listen for the loudest direction, then start walking/hunting. I'm glad I didn't leave the battery in it to leak and corrode everything.

That’s pretty neat. the directional mic might be a little over the top though

 

[neil_w]

I dunno, could be useful. I think @BABAR recently proposed using a cheapie parabolic mic with a screamer to help in tracking... looks like Estes already went there, in some version.

 

[kuririn]

Transroc II.
They occasionally pop up on eBay.
I think it uses a radio transmitter and receiver. CB band, I believe. Very limited range.
https://www.amazon.com/Transroc-002237-Transmitting-Rocket-Locator/dp/B005DBAUDS

 

[georgegassaway]

I think it uses a radio transmitter and receiver. Very limited range.
https://www.amazon.com/Transroc-002237-Transmitting-Rocket-Locator/dp/B005DBAUDS

No, Transroc-II absolutely was NOT a radio transmitter, it was an audio (sound waves) beeper, and the handheld thing was a directional sound wave amplifier. It was a travesty that they called it by that name.

The real original Transroc (1971) was a radio transmitter, that could use various sensors, or even a microphone, and could be used as a tracking beacon too. It used a 27 mHz walkie-talkie. I might have gotten one, except I got a "Foxmitter-3" kit (Foxmitter-3 sort of inspired the Transroc),and it was my first ever PC board project.

Info on the real Transroc:
https://airplanesandrockets.com/rockets/transroc-estes-model-rocket-news-vol11-no2.htm

 

[Initiator001]

Transroc II.
They occasionally pop up on eBay.
I think it uses a radio transmitter and receiver. CB band, I believe. Very limited range.
https://www.amazon.com/Transroc-002237-Transmitting-Rocket-Locator/dp/B005DBAUDS

The original Transroc transmitted on CB channels 11 or 14.
I got one when I was a kid. I little more complicated to build then those Radio Shack project in a box.
Never got mine to work.

The Transroc II is a sonic device.
Bought one and tried it out. The sonic beacon worked fine, never could quite get the directional microphone to guide me to the rocket.

 

[kuririn]

Ah yes, my mistake.

 

[scadaman29325]

The sonic beacon worked fine, never could quite get the directional microphone to guide me to the rocket.

My 15y memory remembers the same thing. Just loud(?) beeper and the microphone thing didn't help much. But putting a new microphone in it and a removable parabolic dish sounds like an interesting project.

 

[scadaman29325]

Found it on my old range box. It needs a 6v battery Battery 2CR1/3N.