Electronics > Repair
Tektronix 370 Curve Tracer - How to adjust zero-point position?
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carl_lab:
Does anybody know, if zero-point position of AC, positive full-wave and negative full-wave collector supply modes can be adjusted individually?

My problem is:
If I adjust zero-point position using the front panel position trimmers let's say for AC, I have to correct position for positive or negative full-wave for a few millimeters to fit the graticule.





I could imagine there maybe internal calibration to fix that problem.
Can anybody help?

Is there a service manual for 370 (not 370A or 370B)?
F1GWR:
Hi Carl_lab

Just saw your post. Maybe it's too late but service manual of plain 370 is here: https://w140.com/tekwiki/images/c/ce/070-6065-01.pdf.
Cal procedure is detailled there: p. 104 = 4-24.
Especially it's not the polarity of the collector supply that must be used for that purpose but the CRT CAL rocker at the right of the Grat Illum pot.

Best,
Christian
electron1999:
Thanks Christian  :scared:

You saved me!

 :phew:
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