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517: Difference between revisions
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as follows: | as follows: | ||
* Gain Stage 1: single-ended, six sections, distributed, [[6AK5]] | * Gain Stage 1: single-ended, six sections, distributed, [[6AK5]] pentodes | ||
* Gain Stage 2: single-ended, six sections, distributed, [[6AK5]] | * Gain Stage 2: single-ended, six sections, distributed, [[6AK5]] pentodes | ||
* Gain Stage 3: single-ended, seven sections, distributed, [[6AK5]] | * Gain Stage 3: single-ended, seven sections, distributed, [[6AK5]] pentodes | ||
* Trig Pickoff: one common-cathode [[6CB6]] pentode | |||
* Signal Delay: 51 feet of RG63U 125-ohm coaxial cable | * Signal Delay: 51 feet of RG63U 125-ohm coaxial cable | ||
* Phase Splitter: single-ended in, differential out, three sections, distributed, [[6CB6]] | * Phase Splitter: single-ended in, differential out, three sections, distributed, [[6CB6]] pentode | ||
* Gain Stage 4: differential, six sections, distributed, [[6CB6]] | * Gain Stage 4: differential, six sections, distributed, [[6CB6]] pentodes | ||
* Gain Stage 5: differential, twelve sections, distributed, [[6CB6]] | * Gain Stage 5: differential, twelve sections, distributed, [[6CB6]] pentodes | ||
The 517 uses 24kV | There is a trigger amplifier in the 517 which can its input from | ||
an external source, or | |||
from the trigger pickoff in the vertical pre-amp, or | |||
from the internal rate generator circuit. | |||
The trigger amplifier circuit has | |||
five stages: | |||
* Phase Splitter: [[6J6]] dual-triode connected as a differential amplifier | |||
* Gain Stage 1: single-ended, three sections, distributed, [[6AK5]] pentodes | |||
* Gain Stage 2: single-ended, three sections, distributed, [[6AK5]] pentodes | |||
* Gain Stage 3: single-ended, common-cathode, [[6AG7]] pentode | |||
* Gain Stage 4: single-ended, common-cathode, [[6AG7]] pentode | |||
The 517 uses 24kV total acceleration voltage on the CRT. This is generated by the Type 420 High Voltage | |||
Power Supply subsystem in the 517. It uses a 1.8kHz oscillator to produce the high voltage, unlike | Power Supply subsystem in the 517. It uses a 1.8kHz oscillator to produce the high voltage, unlike | ||
other Tek scopes which use HV oscillators in the ultrasonic range. | other Tek scopes which use HV oscillators in the ultrasonic range. | ||