[Lowfer] Loop Question

[Bill Ashlock]

Lyle,

>At 300 meters from a 15 meter square loop of 1/2 inch copper with an >added 
>loss resistance of 0.2 ohms and 1 watt input, the predicted >electric field 
>strength is approximately 1,000 uV/m.

>Bill, does that agree with what you measure?

That's in the ball park. My std E/W measuring point is in the parking lot 
here at work. It's 1.8 miles or roughly 3000 meters from home. The signal 
would be 10 times lower (-20db) or 100uv/m compared to 1000uv/m at 300 
meters.

The 17.5uv/m at 300 meters restriction should allow full testing of loop 
performance at 137kHz. The signal at 1.8 miles would be 1.75uv/m and is 
enough to get accurate readings on the SVM during the day. The loop current 
would be reduced to 17.5/1000 times 2A or 35ma. This is about 300uw of input 
power.

Bill


_________________________________________________________________
MSN 8 helps eliminate e-mail viruses. Get 2 months FREE*.  
http://join.msn.com/?page=features/virus