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(Created page with "Potentiometers are a common source of problems in old scopes. Often, just working the potentiometer back and forth over its range is sufficient to rejuvenate it. Other times, ...") |
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Often, just working the potentiometer back and forth over its range is sufficient to rejuvenate it. | Often, just working the potentiometer back and forth over its range is sufficient to rejuvenate it. | ||
Other times, it is necessary to spray some cleaner into the pot. | Other times, it is necessary to spray some cleaner into the pot. | ||
Many of the potentiometers in Tektronix instruments are parts Tek bought. | |||
Some of the potentiometers were made by Tek. | |||
In 1962, Tek-made potentiometers started being used in many instruments. | |||
These are typically identifiable by their gray delrin cover (and their Tek part number). | |||
They are "stopless" pots, which means that they have a detent but can be rotated through the detent. | |||
This feature was intended to reduce shaft and pot problems that result from excessive torque on traditional pots. | |||
<gallery> | <gallery> | ||
File:Tek 311-0304-00 pot.jpg|Tek-made pot, part number 311-0304-00, VAR GAIN in a [[3A74]]. | File:Tek 311-0304-00 pot.jpg|Tek-made pot, part number 311-0304-00, VAR GAIN in a [[3A74]]. | ||
</gallery> | </gallery> | ||
[[Category:Repair issues]] | |||
[[Category:Electromechanical components]] |