10A1
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The Tektronix 10A1, designed by Les Larson, is a differential amplifier plug-in for 647 scopes.
The 10A1 is a comparator, meaning that it has a built-in precision variable DC voltage source that can be added or subtracted from the signal voltage.
Key Specifications
| Bandwidth | DC to 45 MHz (35 MHz in maximum sensitivity) |
|---|---|
| Deflection | 1 mV/div to 20 V/div, 1−2−5 |
| Input impedance | 1 MΩ // 20 pF |
| CMRR | 20,000:1 below 100 kHz |
| Comparison voltage | −6 V to +6 V ±(0.1% + 5 mV) 0 °C to 40 °C |
Suggested probes: P6023
Links
Prices
| Year | Catalog price | In 2026 dollars |
|---|---|---|
| 1965 | $900 | ~$9,400 |
| 1968 | $935 | ~$8,900 |
| 1970 | $1,025 | ~$8,700 |
Internals
The input amplifier uses 8056 nuvistor triodes for the input cathode followers. The rest of the circuit is solid state.
Pictures
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Input Amplifier Schematic
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Attenuator switch drawing
Components
Some Parts Used in the 10A1
| Part | Part Number(s) | Class | Description | Used in |
|---|---|---|---|---|
| 8056 | 154-0417-00 | Vacuum Tube (Triode) | low-voltage Nuvistor triode | 422 • 502 • W • 1S1 • 3A7 • 3S3 • 3T4 • 5T3 • 10A1 |