[Elecraft] K2 freq stability...

Wed Oct 9 09:18:01 2002

Hi

I asked the same question a couple of weeks ago when talking to Eric. The=
 4 mhz oscillator is only required to be accurate while CAL PLL is runnin=
g so the temperature stability is only required for the few minutes while=
 the calibration is running. Once all of the calibration information is s=
tored into the EEPROM the 4 mhz clock is out of the picture as far as any=
 drift is concerned. The drift is in the reference oscillator and the BFO=
 oscillator. The BFO drift causes the bandpass to drift and if you have s=
etup very narrow filters (less than around 150 HZ) then the bandbass may =
drift away from your selected sidetone frequency causing a drop in signal=
.

Don Brown
KD5NDB  =20

----- Original Message -----
From: John Clifford
Sent: Wednesday, October 09, 2002 6:35 AM
To: [email protected]
Subject: [Elecraft] K2 freq stability...

Could a custom TXCO be substituted for the 4 Mhz crystal, in order to
reduce/eliminate the K2's temperature-resultant drift?

- jgc

John Clifford KD7KGX

Heathkit HW-9 WARC/HFT-9/HM-9
Elecraft K2 #1678 /KSB2/KIO2/KBT2/KAT2/KNB2/KAF2/KPA100
Ten-Tec Omni VI/Opt1

email: [email protected]

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