HP-35 Power Supply Waveforms

[cruff]

(04-05-2019 12:34 PM)albertofenini Wrote:  exact Vcc, Vss and Vgg values ?
Thanks for help, this is getting interesting

Good news. How close are the voltages now? Lacking information on how HP specified the tolerances when procuring the zeners, if it is within 5%, then it may be good enough, since this is not a high precision application. You could tell by running the calculator on the voltage and if it behaved then you would be good to go.