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502: Difference between revisions
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Later 502A have solid state (include nuvistor) input stage. [[6DJ8]] as deflection-amplifier and transistor as amplifier and cathode follower ( only by latest version). | Later 502A have solid state (include nuvistor) input stage. [[6DJ8]] as deflection-amplifier and transistor as amplifier and cathode follower ( only by latest version). | ||
The 502 uses a single supply for the upper beam and lower beam CRT cathodes. | |||
The 502A has separate supplies for the two CRT cathodes. | |||
This allows slight differences in horizontal CRT sensitivity between the two beams | |||
to be canceled out in step 8 of the calibration procedure. | |||
* [http://w140.com/tek_502.pdf Tektronix 502 Manual (PDF)] | * [http://w140.com/tek_502.pdf Tektronix 502 Manual (PDF)] | ||