Tektronix 434 s/n below 500000 faulty ps.

[Craig]

Hi John

Thanks - been following that, and made a post this morning about the (ongoing) repair. Basically replaced the totally dead and leaking mercury batteries - with silver oxide coin cells, and checked the sampling diodes (diode in one direction and 7 megohms in reverse - so perfectly OK), but neither trace responds to the offset control, and one is pegged off the bottom of the screen.

Onwards...