517: Difference between revisions
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=== High Voltage Power Supply === | === High Voltage Power Supply === | ||
The 517 uses 24 kV total acceleration voltage on the CRT. This is generated by the Type 420 High Voltage | The 517 uses 24 kV total acceleration voltage on the CRT. | ||
Power Supply subsystem in the 517. It uses a 1.8 kHz oscillator to produce the high voltage, unlike | This is generated by the [[420|Type 420]] High Voltage Power Supply subsystem in the 517. | ||
other Tek scopes which use HV oscillators in the ultrasonic range. | It uses a 1.8 kHz oscillator to produce the high voltage, | ||
unlike other Tek scopes which use HV oscillators in the ultrasonic range. | |||
The 517 has a switch on the front panel that selects between | |||
normal vertical sensitivity, which uses the full 24 kV acceleration voltage, | |||
and "X2" mode, which drops the acceleration voltage to 12 kV | |||
for a doubling of the vertical sensitivity. | |||
The control works by switching the the voltage division ratio | |||
of the feedback to the error amplifier in the HV supply. | |||
== CRTs Used in the 517 == | == CRTs Used in the 517 == | ||
517 units with serial numbers 101 through 925 use the DuMont 5XP CRT. | 517 units with serial numbers 101 through 925 use the DuMont 5XP CRT. | ||