Bob,
You can use a 10 MHz Rubidium standard, or for even more accuracy, the
Trimble Thunderbolt.
The Thunderbolt requires a GPS antenna.
73,
Don W3FPR
On 2/13/2013 7:55 AM, KD7YZ Bob wrote:
Howdy K3' people:
I have the K3XREF board and would like to get a device to use with it.
What is suggested? And what external antenna goes with it?
thanks
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