Gerald Molenkamp wrote: > Hi Howard, > > Please find attached a schematic of the 10544, hope it helps in anyway. > > Regards > > > > Gerald > Gerald
The connection of the 10K oven monitor resistor R12 in the schematic is incorrect. In this position only the very small deviations in the oven supply voltage due to its finite output impedance will be seen as Q4 turns on and off. The resistor should surely be connected to the junction of the darlington (Q4) emitter and the oven heater winding resistor?? The datasheet clearly states that the duty cycle of the oven monitor varies, as is seen with working 10544As. Bruce _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
