[Elecraft] TCXO

[Ed Cole]

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 <rikoski at rikoski.com>
To: elecraft at mailman.qth.net
Cc: Richard Rikoski <rikoski at rikoski.com>
Subject: [Elecraft] TCXO
Message-ID: <11CE6286-6D21-47FD-9734-4B1646D35C31 at rikoski.com>
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