Hi Ed,
Minor note on our TCXO part numbers:
The tighter temp stability TCXO (0.5 ppm typical) is actually Elecraft part
number "TCXO3-1". This is the p/n that shows on the K3S order page and in the
K3S kit manual as an upgrade.
The standard TCXO (5 ppm) supplied with the K3S and K3 has the part number
"E660033".
Regards,
Eric
/elecraft.com/
On 3/13/2016 6:14 PM, Edward R Cole wrote:
Guys<
TCXO's use temperature compensating components to try to keep frequency
stable. They work fairly well if you are at lower frequencies or not
multiplying an LO 18 times. Better is the OCXO (which uses a heater inside an
insulated "oven" to better keep temperature effects isolated).
The EXREF utilizes the better stability of 10-MHz sources to correct the drift
of the TCXO. I does that at a fixed interval in between which both TCXO-1 and
TCXO-3 will drift. Per Elecraft's specifications on page 8 the TCXO-3 is 5
times more stable than the TCXO-1. I have no idea over what time interval the
specs are cited, but most assuredly its more than 4 seconds.
....
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