Re: [time-nuts] Subject: Re: HP5065A C-field current is temperature sensitive

2015-09-02 Thread Poul-Henning Kamp
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

[time-nuts] Subject: Re: HP5065A C-field current is temperature sensitive

2015-09-01 Thread Perry Sandeen via time-nuts
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