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556: Difference between revisions
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The vertical amplifier of the 556 is solid state except for the input cathode followers ([[12AT7]]) and and the | The vertical amplifier of the 556 is solid state except for the input cathode followers ([[12AT7]]) and and the | ||
output stage ([[8608]]). | output stage ([[8608]]). | ||
== CRT Circuit == | |||
The CRT circuit of the 556 uses two HV transformers. | |||
The lower beam transformer, T1301, produces: | |||
* CRT anode voltage: +8150V | |||
* lower beam cathode voltage: -1850V | |||
* lower beam control grid (blanking) voltage: varies, about -2000V | |||
The upper beam transformer, T1351, produces: | |||
* upper beam cathode voltage: -1850V | |||
* upper beam control grid (blanking) voltage: varies, about -2000V | |||
== Comparison with the 555 == | == Comparison with the 555 == | ||