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4S3: Difference between revisions
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The Tektronix Type 4S3 is a 1GHz dual-trace vertical [[sampling_oscilloscope|sampling]] plug-in | The Tektronix Type 4S3 is a 1GHz dual-trace vertical [[sampling_oscilloscope|sampling]] plug-in | ||
for the [[661]] oscilloscope. It uses two [[P6038]] sampling probes. The probes contain sampling | for the [[661]] oscilloscope. It uses two [[P6038]] sampling probes. The probes contain sampling | ||
gates but not amplifiers. The front-end amplifier is | gates but not amplifiers. The front-end amplifier is in the 4S3 and is composed of | ||
a [[7308]] tube (premium 6DJ8) with its two triodes connected in a common-cathode cascode topology. | a [[7308]] tube (premium 6DJ8) with its two triodes connected in a common-cathode cascode topology. | ||