[time-nuts] Thunderbolt antenna?

[Mark Sims]

Yep,  it's a standard choke ring antenna.  It's optimized for L1 freqs.   Leica also rebranded and sold it.   

I have tested 6 different choke ring and geodetic grade antennas.  This one works the best of the bunch (at least for me).   With my 48 hour precision survey code,  I got results within an inch or so of the true location.   VERY impressive.  Most of the other geodetic quality antennas were in the 4-6 inch range.

Attached are two plots of the fixes produced by each antenna.  The first is a Symmeticom conical timing antenna.  The other is the choke ring antenna.

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Looks like a standard choke ring antenna. 		 	   		  
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http://clk.atdmt.com/GBL/go/210850552/direct/01/
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