[Elecraft] K3EXREF and Trimble Thunderbolts

[David Pratt]

I would say the main disadvantage is that you need a suitably positioned
GPS antenna. I understand that the GPS satellites use Caesium resonators
so in theory could be more accurate than Rubidium.

Another alternative is an off-air frequency standard controlled by the
Radio 4 transmission on 198kHz at Droitwich, Burghead and Westerglen
which is accurate to 2 parts in 10^11.  One such device by Quartzlock is
currently on eBay (item 180648121165). I can confirm that in field test
trials the Quartzlock Model 2A locks the K3 okay.

73 de David G4DMP

In a recent message, "Julian, G4ILO" <julian.g4ilo at gmail.com> writes
>What are the advantages / disadvantages of this type of frequency standard
>over the Efratom LPRO-101 which is a rubidium standard?
-- 
 + - - - - - - - - - - - - - - - - +
 | David M Pratt, Kippax, Leeds.   |
 | Website: http://www.g4dmp.co.uk |
 + - - - - - - - - - - - - - - - - +