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Input is then coupled to the paraphase amplifier or phase inverter made up of two [[12AU6]] pentode tubes - V3854 and 4854. | Input is then coupled to the paraphase amplifier or phase inverter made up of two [[12AU6]] pentode tubes - V3854 and 4854. | ||
This stage converts the input signal to a differential push-pull output. Output of this stage is then passed to the first cathode follower, made with a | This stage converts the input signal to a differential push-pull output. Output of this stage is then passed to the first cathode follower, made with a [[12AT7]] dual triode tubes V3863A and V3863B. The output from this cathode follower is then passed to the main amplifier made with a pair of [[12AU6]] pentodes, V3874 and V4874. The final output to the scope chassis is driven via final cathode follower with a [[12AT7]] dual triode tube, 3893A and 3893B, which drives pin 1 and 3 of the connector to drive the vertical amplifier inside the chassis. | ||