at low temperatures bipolar devices will have reduced gain
73
KJ6UHN
Alex
-------- Forwarded Message --------
Subject: [time-nuts] quartz / liquid nitrogen
Date: Mon, 2 Apr 2018 12:46:26 -0700
From: Tom Van Baak <t...@leapsecond.com>
Reply-To: Tom Van Baak <t...@leapsecond.com>, Discussion of precise time
and frequency measurement <time-nuts@febo.com>
Organization: LeapSecond.com
To: Discussion of precise time and frequency measurement
<time-nuts@febo.com>
Has anyone tried running a quartz oscillator at liquid nitrogen temperatures: -196
C (-321F, 77K)? It's probably impractical commercially, but maybe something of
value to a time nut. Would that dramatically lower temperature improve phase noise
& short-term performance? Is there a crystal cut that could be optimized for 77
K instead of ~25 C (room) or 60 C (oven)?
If not Nitrogen, how about dry ice (-109F -78C)?
/tvb
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