HP-35 power unit: Failing Vgg voltage

[robjordan]

(11-28-2022 10:52 PM)teenix Wrote:  It's amazing after 50 odd years, the board still looks new.

Thanks Tony. The photo isn't my calculator, it was just one I found online that illustrates a similar transformer. But I think all of these classics are beautiful, and such a contrast to modern miniaturised mass-produced circuit boards.

I'll try resoldering the joints and see how we go from there.

Cheers
Rob