HP-35 Power Supply Waveforms

[albertofenini]

We double checked and the scheme seems ok,
BTW, I'm right if I consider that Vgg is wrong because Vss is wrong ?
I understand well that these two are somehow related ?
Reading some of the articles it looks like Vss is a reference Voltage.
When Vss is wrong we have read that Cr4 (the diode cathode connected to the cathode of the zener) is a suspect.
Is this a good theory or we are totally wrong ?
Thanks for help !!!!

P.S. : one last question, are the Toroids from classic equal to the toroids from Woodostock ?
Looking here https://www.keesvandersanden.nl/calculat...supply.php
it seem that L1 has a different value if is from a classic (190H) or from a Woodstock (110H)