[Lowfer] Re: [Lowfe Worthwhile going to Shielded loop?r]

Bill Ashlock [email protected]
Mon, 27 Oct 2003 17:08:38 -0500


>I just got a 30 Ft in cir. shielded loop in operation
>used RG 58 coax. Used the Burhams preamp and one
>of Mitches board's . It has extremely deep notches
>and is allowing me to reduce QRM.QRN . It works
It really is working for me well at this QTH

But Bob, not to pore any cold water on your good nulling ability, don't 
forget you still have to pull a very weak signal out of the AT noise, and 
this depends to a large degree on how much noise contribution that amp has 
vs the low signal level of a non-tuned loop. Don't forget the Q of the loop 
multiplies the signal; IE: A loop with a Q of 200 has 200 times more signal 
compared to a non-tuned loop. We'll accept no loop design that can't copy 
the loop group up here at least 50% of the time <Har>.

Bill A

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