31,832
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556: Difference between revisions
→The 556 Story, as recalled by engineer Phil Crosby
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Each of the transformers is driven by its own independent oscillator using a [[6GF5]] power pentode. | Each of the transformers is driven by its own independent oscillator using a [[6GF5]] power pentode. | ||
==The 556 Story, as recalled by engineer [[Phil Crosby]]== | ==The 556 Story, as recalled by engineer [[Phil Crosby]] in September 2020== | ||
[[File:Phil and 556.jpg|thumb|Phil Crosby then and now, with a Tektronix Type 556 and spare CRT at the VintageTEK Museum in Beaverton, Oregon.]] | [[File:Phil and 556.jpg|thumb|Phil Crosby then and now, with a Tektronix Type 556 and spare CRT at the VintageTEK Museum in Beaverton, Oregon.]] | ||
<!--Phil Crosby then and now, with a Tektronix Type 556 and spare CRT at the VintageTEK Museum in Beaverton, Oregon.--> | <!--Phil Crosby then and now, with a Tektronix Type 556 and spare CRT at the VintageTEK Museum in Beaverton, Oregon.--> | ||
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<!--A pair of 8233 tubes. (temporary photo)--> | <!--A pair of 8233 tubes. (temporary photo)--> | ||
<!--A pair of 8608 tubes. (temporary photo)--> | <!--A pair of 8608 tubes. (temporary photo)--> | ||
[[File:Two 8608 tubes.jpg|thumb|A pair of 8608 tubes.]] | |||
<!--Vertical output tubes. The beige rectangular components are 1kΩ plate resistors. In addition to reducing parasitics, moving the anode connection to the top on the 8608 tube allows the plate resistors, which dissipate a few watts, to be in the air stream from the fan.--> | <!--Vertical output tubes. The beige rectangular components are 1kΩ plate resistors. In addition to reducing parasitics, moving the anode connection to the top on the 8608 tube allows the plate resistors, which dissipate a few watts, to be in the air stream from the fan.--> | ||