Collecting Design Requirements Remote Radio Stethoscope

[Daless2]

Collecting Design Requirements Remote Radio Stethoscope

Hi Folks, I want to build something that I think will be useful for many of us; A remote, radio transmitter stethoscope to be used when trying to diagnose where a sound is coming from under a vehicle.

The idea is to strap this little transmitter (2? cube) to an under body component using a velcro strap.

You would then tune your FM radio to the transmitting frequency and drive away listening for the sound on the Jeeps radio.

It may take placing the transmitter in a few different spots, but I do believe it would work to get down to the component that is causing the noise.

You folks want to give me your input on this?

Here are my design requirements so far:

• Small, target is a 2-inch cube.
  Easily reproduced circuit using minimal parts. (If you can solder you can build.)
  9-volt battery for power.
  Able to receive stethoscope signal on Jeeps FM radio (87.9 or something like that.)
  Able to easily mount on any non-moving under jeep assembly.
  Somewhat watertight, if not waterproof.
  Under $10 in cost.

I have a fiend, Chris B who is a new Jeeper from near Cleveland, Ohio. (I have also invited him to join this forum.)

Chris is not only an Electrical Engineer, but he is one of those really smart ones too! He makes his living designing chips that control CT/CAT scan machines.

Once I collect your thoughts on how this thing should function and what features it should have I am going to enlist Chris?s help in designing the remote stethoscope.

Please share your thoughts.

Frank