cave pinger loan?

[ed pavey]

Would there be free lodging and food involved?

[Brian Kakuk]

If you think you can get mu metal, I am sure I can find some investors

If you can get Ken to build some more pingers, I would be interested in contributing to the Mumetal fund. I could use one more pinger out here. Can signals from Brian's coils be received by Ken's receiver?

[FW]

If you can get Ken to build some more pingers, I would be interested in contributing to the Mumetal fund. I could use one more pinger out here. Can signals from Brian's coils be received by Ken's receiver?

Probably not. I think they are designed to run on different frequencies. Ken built three pingers, and they are all on different frequencies, that is why there is a three position knob on the receiver.

[FW]

http://www.magnetic-shield.com/products/mumetal.html

They have a pretty large minimum order.

[ed pavey]

Been wanting to test our new pinger

[apitkin]

Andy Pitkin made a few (self leveling) for some Karst Underwater Research (http://www.karstunderwwaterreseach.org) projects. We used them in Texas at Phantom and they were great. The receiver is still the same disc receiver though.

Actually, I didn't build the transmitter, just the battery pack/timer system. I think it's a Brian Pease transmitter, housed by Joel at Light Monkey. The receiver is definitely a Brian Pease unit.

Ken did publish his design. I meant to build a few but never got around to it. I have the details somewhere on my hard drive.

[jason]

If you can get Ken to build some more pingers, I would be interested in contributing to the Mumetal fund. I could use one more pinger out here. Can signals from Brian's coils be received by Ken's receiver?

Why not just use a loop antenna? They're cheap and you can level them with a couple of bubble levels?

[mwenner]

If you think you can get mu metal, I am sure I can find some investors

Now you're talking! Yes, Jon we need someone like you to make boards, etc. We know there's interest in the use of radio location devices, and calling it a "market" might be a stretch, but having a run on circuit boards, and small receivers would be a good start. We used one of Ken S's pingers up in KY a couple years ago, and we need one next week, but could not coordinate it on time. Hands down I'm interested in having a few built. Contact me if you want to talk about it.

[jlillest]

So, how about a quick run-down of the types of environments that people want to use these in? I'd like to have something versatile and modifiable, but I'll contact Pease and see what he thinks we should use.

So for starters, I'd like mine for a variety of situations, but for starters:
5-20m of rock, salt water up to 5m. Same in freshwater with more overburden.

-Jon

[FW]

So, how about a quick run-down of the types of environments that people want to use these in? I'd like to have something versatile and modifiable, but I'll contact Pease and see what he thinks we should use.

So for starters, I'd like mine for a variety of situations, but for starters:
5-20m of rock, salt water up to 5m. Same in freshwater with more overburden.

-Jon

Ken uses his pingers in the Nullarbor, and the overburden is 100m, and the water up to 30m deep.. It is pretty dry, though. Brian uses air core, or ferrite, Ken uses mu metal. Have you seen one of Ken's pingers? They are much more compact that any of Brian's.