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{{Instrument Sidebar | {{Instrument Sidebar | ||
|manufacturer=Tektronix | |manufacturer=Tektronix | ||
|model=131 | |model=Type 131 | ||
|class=Amplifier | |class=Amplifier | ||
|series= | |series= | ||
|summary=Current Probe Amplifier | |summary=Current Probe Amplifier | ||
|image=Tek 131 front.jpg | |image=Tek 131 front.jpg | ||
|caption=Type 131 Current Probe Amplifier | |caption=Type 131 Model 4 Current Probe Amplifier | ||
|for=P6016 | |for=P6016 | ||
|introduced=1960 | |introduced=1960 | ||
| Line 18: | Line 18: | ||
All four Type 131 Models used PNP transistors, thus requiring a negative power source. Models 1 thru 3 were hard-wired to their separate minus 19 V power supplies, while Model 4 got a power supply, 015-027, with a proprietary Tektronix coaxial connector. The center pin of the Type 131 Model 4 power supply connector is grounded, so the outer contact is ~19 V negative. Note that the 015-0058-01 power supply for the Type 134 uses the same connector with the same relative voltage levels (center conductor ~19 V more positive than the outer contact) but the negative outer contact on the Type 134 power supply is held close to ground. So the Type 131 Model 4 will only work with the correct 015-027 Power Supply. | All four Type 131 Models used PNP transistors, thus requiring a negative power source. Models 1 thru 3 were hard-wired to their separate minus 19 V power supplies, while Model 4 got a power supply, 015-027, with a proprietary Tektronix coaxial connector. The center pin of the Type 131 Model 4 power supply connector is grounded, so the outer contact is ~19 V negative. Note that the 015-0058-01 power supply for the Type 134 uses the same connector with the same relative voltage levels (center conductor ~19 V more positive than the outer contact) but the negative outer contact on the Type 134 power supply is held close to ground. So the Type 131 Model 4 will only work with the correct 015-027 Power Supply. | ||
Using the wrong power supply with either amplifier | Using the wrong power supply with either amplifier Type will short circuit the power supply output. Tektronix claims that this will not damage the Type 134 power supply (015-0058-01) if connected to a Type 131. Damage to the Type 131 power supply (015-027) seems likely if it is connected to a Type 134. | ||
Power supplies for Type 134s are labeled "POWER SUPPLY FOR TYPE 134", while those for Type 131 Model 4s have no marking other than Tektronix and 015-027. In addition, all Type 131 power supplies have the AC line connector built onto the end of the power supply housing, while the 134 power supplies came with a ~3' AC line cord and plug. | Power supplies for Type 134s are labeled "POWER SUPPLY FOR TYPE 134", while those for Type 131 Model 4s have no marking other than Tektronix and 015-027. In addition, all Type 131 power supplies have the AC line connector built onto the end of the power supply housing, while the 134 power supplies came with a ~3' AC line cord and plug. | ||
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Tek 131 side.jpg | Type 131 Model 4 Side View | Tek 131 side.jpg | Type 131 Model 4 Side View | ||
Tek_p6016_131_2.jpg | Type 131 Model 3 with P6016 | Tek_p6016_131_2.jpg | Type 131 Model 3 with P6016 | ||
Tek 131 schem.png|Schematic, Models 1-3 | Tek 131 schem.png|Type 131 Schematic, Models 1-3 | ||
Tek 131 early 1.jpg|Type 131 Model 3, with attached power supply | Tek 131 early 1.jpg|Type 131 Model 3, with attached power supply | ||
Tek 131 early 2.jpg|Type 131 Model 3 | Tek 131 early 2.jpg|Type 131 Model 3 | ||
Revision as of 20:43, 6 March 2023
The Tektronix Type 131 is a Current Probe Amplifier used only with the P6016 Current Probe. Type 131s were never given serial numbers, instead, they were produced cronologically in "Models." Models 1 thru 3 looked alike, while Model 4 got a redesigned enclosure like that used by the Type 134.
All four Type 131 Models used PNP transistors, thus requiring a negative power source. Models 1 thru 3 were hard-wired to their separate minus 19 V power supplies, while Model 4 got a power supply, 015-027, with a proprietary Tektronix coaxial connector. The center pin of the Type 131 Model 4 power supply connector is grounded, so the outer contact is ~19 V negative. Note that the 015-0058-01 power supply for the Type 134 uses the same connector with the same relative voltage levels (center conductor ~19 V more positive than the outer contact) but the negative outer contact on the Type 134 power supply is held close to ground. So the Type 131 Model 4 will only work with the correct 015-027 Power Supply.
Using the wrong power supply with either amplifier Type will short circuit the power supply output. Tektronix claims that this will not damage the Type 134 power supply (015-0058-01) if connected to a Type 131. Damage to the Type 131 power supply (015-027) seems likely if it is connected to a Type 134.
Power supplies for Type 134s are labeled "POWER SUPPLY FOR TYPE 134", while those for Type 131 Model 4s have no marking other than Tektronix and 015-027. In addition, all Type 131 power supplies have the AC line connector built onto the end of the power supply housing, while the 134 power supplies came with a ~3' AC line cord and plug.
Key Specifications
| Sensitivity | 1 mA/Div to 1 A/Div, 1-2-5 (scope input fixed at 50 mV/Div) |
|---|---|
| Noise | 0.1 mAp-p |
| Risetime | 20 ns (eq. 17 MHz -3 dB) |
| Lower frequency limit | 50 Hz |
| Delay time | 32 ns typ. |
(all specifications are overall values including the P6016 probe)
Pictures
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Type 131 Model 4 Front
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Type 131 Model 3 Front
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Type 131 Model 4 Side View
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Type 131 Model 3 with P6016
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Type 131 Schematic, Models 1-3
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Type 131 Model 3, with attached power supply
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Type 131 Model 3
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Type 131 Model 3
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Type 131 Model 3
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Type 131 Model 3
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Type 131 Model 3
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Type 131 Model 3
