Tektronix 434 s/n below 500000 faulty ps.

[Craig]

The pot:   item 108 page,    183 exploded diagram ,   unfortunately the mto just says variable resistor.

Don't look at the mechanical exploded diagram. Look at circuit diagram 8 on page 167. R799 is the Variable Time/div. 10k

Ah - just looked at your last post - superb!