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The Tektronix Type P plug-in is a | The Tektronix Type P plug-in is a calibration aid [[introduced in 1959]] for [[500-series scopes]]. | ||
It applies a step | It applies a fast (4 nanosecond risetime) voltage step to the mainframe vertical amplifier, via plug-in connector pins 1 and 3. It's used when adjusting the peaking coils and the delay line. | ||
The Type P is designed to simulate a perfectly-adjusted Type [[K]] plug-in being driven by a Type [[107]] square-wave generator. The idea is to calibrate a mainframe using Type P, then use this mainframe and a 107 to calibrate other plug-ins. | |||
The Type P is designed to simulate a Type [[K]] plug-in being driven by a Type [[107]] | |||
The Type P does not contain any tubes, transistors, or tunnel diodes. | The Type P does not contain any tubes, transistors, or tunnel diodes. | ||
It does contain a [[selenium rectifiers|selenium rectifier]]. | It does contain a [[selenium rectifiers|selenium rectifier]] and a [[mercury switch]]. | ||
The selenium rectifier in the Type P has four sections and full-wave rectifies | The selenium rectifier in the Type P has four sections and full-wave rectifies | ||
the 6.3 VAC that is supplied by the scope mainframe on pins 13 and 14. | the 6.3 VAC that is supplied by the scope mainframe on pins 13 and 14. | ||
Line 20: | Line 13: | ||
constant component in the magnetic field to bias the switch contacts to the | constant component in the magnetic field to bias the switch contacts to the | ||
best operating point. | best operating point. | ||
The Type P was the only new plug-in for [[introduced in 1959|1959]], unless you count the upgrade | |||
from Type 53/54[[C]] to Type [[CA]]. It was dropped after 1963, replaced by the [[TU-7]]. | |||
* [http://bama.edebris.com/manuals/tek/p/ Tektronix Type P Manual (PDF)] | * [http://bama.edebris.com/manuals/tek/p/ Tektronix Type P Manual (PDF)] |
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