517: Difference between revisions

14 bytes added ,  29 November 2014
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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.


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.