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.
