); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY I do have some experience with temperature controlled ovens. I found that a long term plot of the temperature while using an unregulated supply on the oven heater showed small random variations due to voltage variations. When the oven heater was put on a regulated supply the line became flat. The problem here seems to be during the heat up cycle. The voltage doesn't need to be regulated during that time. You might try sensing the error signal and when it is outside of the linear control range you could switch in a parallel transistor and resistor to handle the warm-up current and it would switch out when the oven has stabilized at the lower current.
Regards. Max. K 4 O D S. Email: [EMAIL PROTECTED] Transistor site http://www.funwithtransistors.net Vacuum tube site: http://www.funwithtubes.net Music site: http://www.maxsmusicplace.com To subscribe to the fun with tubes group send an email to, [EMAIL PROTECTED] ----- Original Message ----- From: "Bill Hawkins" <[EMAIL PROTECTED]> To: "'Discussion of precise time and frequency measurement'" <[email protected]> Sent: Friday, October 26, 2007 1:21 AM Subject: Re: [time-nuts] Parallel voltage regulators > There is a concept in temperature control called feed-forward. > > In this case you would sample the supply line with an inverting > amplifier and use it to increase the oven drive signal as the > line voltage decreases. The goal is to keep the integral term > from changing as the line voltage changes. It is not as easy > as it sounds. > > Bill Hawkins > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.5.503 / Virus Database: 269.15.11/1094 - Release Date: > 10/26/2007 8:50 AM > > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
