To add a little to what Lance-W7GJ said:
Every K3 has a TCXO. Standard is the TCXO-01 with 5ppm stability which
fine if you only run CW/SSB/AM/FM. TCXO stands for Temperature Controled
Xtal Oscillator. I provides the frequency standard for the K3
synthesizers to lock to. 5ppm translates as 5*10^-6 or on 10-MHz
frequency is within 5-Hz; 30-MHz its 15-Hz.
TCXO-03 improves this to 1ppm: 1-Hz at 10-MHz; 3-Hz at 30-MHz
If you buy the TCXO-03 option and add the K3EXREF board this improves to
2-Hz at 30-MHz. The EXREF compares the TCXO with a high standard 10-MHz
reference oscillator like an OCXO or GPSDO. When the TCXO drifts off
frequency the EXREF corrects that about every 4-seconds.
High frequency stability is needed when running certain digital modes
such as FT8. Also, useful if your K3 is driving a VHF/UHF/mw transverter.
73, Ed - KL7UW
Date: Wed, 30 Mar 2022 07:44:49 -0500
From: rikoski <[email protected]>
To: [email protected]
Cc: Richard Rikoski <[email protected]>
Subject: [Elecraft] TCXO
Message-ID: <[email protected]>
Content-Type: text/plain; charset=us-ascii
What are the uses for the TCXO option in a K3?
Why would I want one? Thanks,
73 W9ZD
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