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547: Difference between revisions
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===Vertical Amplifier=== | ===Vertical Amplifier=== | ||
The 547 has a five-stage BJT vertical amplifier that is fully differential from the plug-in | The 547 has a five-stage BJT vertical amplifier that is fully differential from the plug-in | ||
connector to the CRT vertical deflection plates. | connector to the CRT vertical deflection plates. | ||
There is one tube in the vertical signal path, | |||
a [[12AT7]] acting as a unity-gain buffer between the plug-in connector and the vertical amplifier. | a [[12AT7]] acting as a unity-gain buffer between the plug-in connector and the vertical amplifier. | ||
The plug-in bay of the 547 has a "spoiler switch" that only enables the full bandwidth of the 547's | |||
vertical signal path when certain relatively modern plug-ins are used, | |||
such as the [[1A1]], [[1A2]], [[1A4]], [[1L30]], and [[1L40]]. | |||
Those plug-ins have a small hole to the left of the plug-in to mainframe connector, | |||
so they can be fully inserted without pressing the spoiler switch. | |||
There is a 170 nanosecond [[delay line]] between the first and second gain stages. | There is a 170 nanosecond [[delay line]] between the first and second gain stages. | ||