3A1
Template:Plugin Sidebar 2 The Tektronix Type 3A1 is a dual-trace amplifier plug-in introduced in 1962 for 560-series scopes.
Key Specifications
| Bandwidth | 10 MHz |
|---|---|
| Risetime | 35 ns |
| Input impedance | 1 MΩ // 47 pF |
| Deflection factor | 10 mV/div to 10 V/div, 1-2-5 sequence |
Internals
The input signal passes through compensated attenuators and then into a cathode-follower stage made of two 7586 Nuvistor tubes.
Channel switching in ALTERNATE mode is done using diodes. The output stage that drives the vertical deflection plates of the scope uses a pair of 8233 frame grid power pentode tubes.
Pictures
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Front view
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Right side
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Right side
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Top view
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Bottom view
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input amplifier schematic
