[time-nuts] HP5065A C-field current is temperature sensitive
Poul-Henning Kamp
phk at phk.freebsd.dk
Tue Sep 1 11:22:11 UTC 2015
--------
In message <16507.1441083305 at timeok.it>, timeok at timeok.it writes:
>can you give me more info about th PHK's changes to the oven?
I have not changed the oven.
The only change I will propose so far is this:
Measure the voltage over A15CR5
Multiply by 76
Replace A15R10 and A15R11 with a combination of
<5PPM resistors having that value.
Ie: if your A15CR5 voltage is 7.9 Volt, you should remove
R10 and R11, and put a 600 Ohm resistor there instead.
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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