Gangue, I guess I should give some additional information
about the Sniffer Probe since I did get a request.

Ok, You can delete this message now if you have
the June 4th, 1998 issue of EDN Magazine.
http://www.ednmag.com

The sniffer probe is miniature, only about 2 inches long and
very usable up to 1 GHz or higher if linearity isn't a problem
above 1 GHZ (Only characterized to 1 GHz in the article.)  Very
flat response!

Building it:

Materials:
3/32 inch OD hollow Brass tube.  1.5 inches long.
50 Ohm at 1/8 or 1/10 watt metalfilm resistor.
BNC Connector - Amphenol 31-317
10 Turn coil of #34 AWG, .050 in. Diameter.
Shrink Tubing.
.006 inch jewlers Saw (Uh huh, Right. Got one over here :) 
Epoxy.

Construction:
Prepare Brass tube.
Saw from the end of the tube to produce two 1/8 inch slots.
(These allow the Magnetic field in.

Solder one of the axial leads of the 50 Ohm resistor to the
BNC center pin at the rear of the connector.  Keep the resistor
straight since it forms the center of the coaxial line and the
shield will be the brass tube slipped over it and soldered to the
BNC connector.

Solder the end of the 10 turn coil to the other lead of the
resistor.  Now you must adjust the length of the coil so it doesn't
extend beyond the tube when the tube is fitted over the resistor and
slid into the BNC connector.  Solder the other end of the coil
to the tip of the shield.

Add heat shrink tubing over the end, leaving 1/16 inch or so extending
past the tube.  Fill this 1/16 inch resevoir with epoxy.

You now have a EMI probe with non-conductive tip for close-in work,
able to actually touch individual board traces on a PC board!

Using it:  Connect to O-Scope and direct tip to
signal source.


ENJOY!
Ed Loranger "72"
-- 
72, Ed WE6W (CW only/VP-0); http://www.qsl.net/we6w  Santa Rosa, CA 
QRP-Z#106 QRP-L#1068 AR#112 NC#2227 ARCI#9397 QAA#006
Home email is mailto:we6w@juno.com