[time-nuts] Tbolt with Palisade?

[GandalfG8 at aol.com]

In a message dated 20/01/2009 09:32:45 GMT Standard Time,  
grant at ghengineering.co.uk writes:

Guess  I'll have to start a search for an HP58532A, VIC-100, Vaisala  or  
similar.  I don't think a cheapy £4 patch antenna will give the same  
performance.


-----------------
Hi Grant
 
I think this really does depend on where you are, satellites in view etc,  
and what level of performance you're actually looking for.
 
I have a few different timing antennas but have found these don't give  very 
reliable reception indoors.
Until I can get these mounted outdoors I have been having good results  on 
various receivers using some small Trimble magnetic patch antennas,  specified 
26dB gain, attached to a steel plate and sitting on a shelf  inside a one level 
timber framed house on the west coast of Scotland.
These came via a buy it now from the usual place at $21 for  10 about a year 
ago.
 
Driving a pair of Thunderbolts with these and comparing them with an HP  
53132A counter, either one as reference and the other as input, once  locked I see 
variations of just a few places around zero in the 10th decimal  place.
I have used this test on any two units selected from four with  consistent 
results.
 
Not a very scientific test perhaps, and nothing else measured, but as  
regards frequency at least I don't think they're suffering too much  from their 
"lesser" antennas:-)
 
regards
 
Nigel
GM8PZR