[Elecraft] [K3] KTCXO3-1 and standard TXCO drift rates

[Bill Frantz]

Since I started using the K3 for PSK-31 contacts, I've noticed 
that I have to make many fine tuning adjustments during weak 
signal QSOs. I don't remember having to make as many using the 
Small Wonder Labs PSK-20 direct conversion receiver. I am using 
Data-A mode and a SignaLink USB "sound card" to a MacBook Pro 
running cocoaModem.


There are several possibilities here:

   * My memory is bad.
   * The other station is drifting.
   * The effect is caused by the SignaLink.#
   * The effect is caused by the K3.

# The signaLink is the same one I used with the PSK-20.

I have the stock 5ppm TXCO. I try to let the K3 warm up for 10 
minutes before serious use, and I have observed the drift after 
several hours of operation.

How do the short-term (5 to 10 minute) drift rates of the two 
TXCOs compare? I think I need stability to about 1/2 to 1 Hz for 
the duration of the QSO.

Cheers - Bill, AE6JV

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Bill Frantz        | I like the farmers' market   | Periwinkle
(408)356-8506      | because I can get fruits and | 16345 
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CA 95032