[Lowfer] Connecting to Loop

[Bill Ashlock]

>Hey Guys,
>What turns ratio do you use to couple to those 50' Loops ?
>Might give it a try, I got  enough wire ( coax ) that is.

Lewis, this depends on the Rac of the loop and the P-P drive signal. It's 
all in my second article. As an example: With a 24vdc Vcc (24v p-p square 
wave on the primary of the transformer) the reflected load from the loop 
through the transformer, based on 1w, is about 70 ohms. If your loop Rac is 
0.7 ohms the turns ratio would be sq rt 70/.7 = 10 to 1. You can just get by 
with the popular #43 core type on this one.

Bill A

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