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plate-to-cathode voltage of about 100V. | plate-to-cathode voltage of about 100V. | ||
[[File:2a61 frontend.png|thumb|left|upright|Nuvistor-based front-end amplifier]] | [[File:2a61 frontend.png|thumb|left|upright|[[Nuvistor]]-based front-end amplifier]] | ||
Starting with serial number 987, the front-end differential amplifier | Starting with serial number 987, the front-end differential amplifier | ||
was made with four [[7586]] nuvistor triodes: V424, V425, V524, and V525. | was made with four [[7586]] [[nuvistor]] triodes: V424, V425, V524, and V525. | ||
The parallel combination of V424 and V425 forms one side of the differential amplifier | The parallel combination of V424 and V425 forms one side of the differential amplifier | ||
and the parallel combination of V524 and V525 forms the other side. | and the parallel combination of V524 and V525 forms the other side. | ||
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Audio Generator. | Audio Generator. | ||
* [http://bama.edebris.com/download/tek/2a61/2a61.djvu Tektronix 2A61 Manual (DjVu)] | * [http://bama.edebris.com/download/tek/2a61/2a61.djvu Tektronix 2A61 Manual (DjVu)] | ||
* [http://w140.com/2a61.pdf Tektronix 2A61 Manual (PDF)] | * [http://w140.com/2a61.pdf Tektronix 2A61 Manual (PDF)] |