Re: [time-nuts] Subject: Re: HP5065A C-field current is temperature sensitive
In message <145271941.122608.1441164033464.javamail.ya...@mail.yahoo.com>, Perr y Sandeen via time-nuts writes: >A possible solution might be touse two of the TL431 programmable >shunt regulators. That would be worse than what is in my 5065 now. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@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. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Subject: Re: HP5065A C-field current is temperature sensitive
Hi, A possible solution might be touse two of the TL431 programmable shut regulators. One to replace the zener diodeand the second to form a simple oven using a thermistor and pot to set thetemp. See: http://www.techlib.com/electronics/ovenckts.htmand TL431 data sheet for details. Then one can use 1% 50 ppm metalfilm resistors, far, far less expensive than <5 ppm units. Put the whole package in part ofa 1/2 inch reformed copper water pipe. Using just two pots bothtemperature and output voltage can be quite precisely adjusted. Cheap. Regards, Perrier ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
