I was looking around for some ferrite to wind a probe coil for my P.I. detector.
Looked in my junk box and found an old ferrite aerial from a radio.
It still had its coils on it and I decided to measure them with a meter in case any came near to the 1.5 ohm of my standard coil.
I found one at the end of the ferrite that measured 1.55 ohms.
Lashed it up to the detector and couldn't believe the result!
It works PERFECTLY as a probe!
I couldn't have specified anything better!
It's sensitive to small coins from about 4 inches from the front face and about half an inch at the sides.
That makes it highly directional, which is exactly what I wanted.
It also gives a lovely rising tone as you get nearer to the target until the detector really sings from about half an inch..... perfect!
Just a few pence worth of plasic tube and I'm done!
BTW - Thanks to Cornelius for suggesting using ferrite rod!
Linkback: You are not allowed to view links.
Please Register or Login
http://www.thunting.com/smf/index.php/topic,4434.msg28866.html#msg28866
There are 1 attachment(s) in this post which you can not view or downloadPlease register for viewing them. 04042009325.jpg
|
|
Logged
|
|