On May 23, 10:07*am, tom wrote:
On 5/23/2010 7:43 AM, Man-wai Chang to The Door (33600bps) wrote:



http://www.mtmscientific.com/loop.html

Anyone got a circuit diagram?

I have one I made years ago that is similar, so I can describe it for you..

Materials needed - about 32m of wire, light plywood (I used scrap),
365pf (or anything close) capacitor, connector of choice.

My box is made with 127cm by 13cm plywood pieces joined as an X, which
will give you a 90cm square box. *The dimensions are not very critical.
* Drill 10 evenly spaced holes near the end of each piece. *Thread the
wire through the holes until 10 turns are in place. *You will bring the
2 tails of wire in to a point near the center of the X where you have
mounted the tuning capacitor. *Solder the tails to the capacitor. *Drill
2 holes in the end of each piece just inside of the 10 turn loop for the
pickup loop and thread a 2 turn loop into place. *Run those tails to a
point near the center of the X where you have mounted your connector of
choice. *Solder to connector.

Connect your AMBCB radio and tune the capacitor for max signal strength.
* Enjoy!

Vary size of box, number of turns in loop, and value of the capacitor
for other bands.

tom
K0TAR

Havent seen one of those in years. Made one when I was a kid in High
School. It was my project in woodworking and physics class.

Jimmie