Envelope-to: dave@picks.force9.co.uk
Delivery-date: Fri, 20 Jan 2006 00:56:04 +0000
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Date: Fri, 20 Jan 2006 00:56:19 +0000
From: John Andrews <w1tag@w1tag.com>
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To: rsgb_lf_group@blacksheep.org
References: <NKEMLGOEKANPNJOBFBAFGEKDCJAA.g4wgt@tiscali.co.uk> <016101c61d02$12ceca40$2101a8c0@pcroelof> <002b01c61d54$c510aaa0$20347ad5@w4o8m9>
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Subject: Re: LF: Re: Mini Whip and local noise
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Jim's comments make sense, and I hope to do some experiments as time 
permits.

 I have been treating LF receive loops as balanced antennas, with no 
intended ground reference. This has been easy in my case, as I series 
tune the loop into a coupling transformer. Parallel tuning would also be 
possible.

This arrangement has been much quieter than earlier attempts with 
unbalanced loops. Jay has carried this a bit further by using a twisted 
pair feeder back to the shack. My experiments with that at our summer 
place were inconclusive, but it might be a help in a noisy situation. 
I'm thinking of giving it a try here, as my local noises are higher than 
ever this winter, and Jay consistently has better copy on the TA signals.


John Andrews