HP-35 power unit: Failing Vgg voltage

[robjordan]

Thanks for the quick response.

Regarding replacements - do you suggest replacing capacitors with the Kemet T110, which seem to still be available? And the diodes: should they be germanium? I think saw someone recommended Schottky as an alternative with similar forward voltage drop.

Thanks, yes, I've been looking at Laporte's page, also schematics here (Tony Duell's work I think) and Kees Van der Sanden's page.