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* [[Media:070-237.pdf|Tektronix P6016 manual]] (includes 131 schematics) | * [[Media:070-237.pdf|Tektronix P6016 manual]] (includes 131 schematics) | ||
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The '''Tektronix Type 131''' is a current probe amplifier used only with the [[P6016|P6016 current probe]]. Type 131s were never given serial numbers, instead, they were produced chronologically in "models." Models 1 thru 3 looked alike, while Model 4 got a redesigned enclosure like that used by the Type 134. | The '''Tektronix Type 131''' is a current probe amplifier used only with the [[P6016|P6016 current probe]]. Type 131s were never given serial numbers, instead, they were produced chronologically in "models." Models 1 thru 3 looked alike, while Model 4 got a redesigned enclosure like that used later by the Type 134. | ||
{{BeginSpecs}} | {{BeginSpecs}} | ||
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==Internals== | ==Internals== | ||
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 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 | 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 [[015-027]] power supply seems likely if it is connected to a Type 134. | ||
Power supplies for Type | Power supplies for Type [[134]]s are labeled "POWER SUPPLY FOR TYPE [[134]]", while those for Type 131 Model 4 have no marking other than Tektronix and [[015-027]]. All Type 131 power supplies have the AC line connector built onto the end of the power supply housing. Early [[134]] power supplies share the same construction, while later [[134]] power supplies came with a ~1 m AC line cord and plug. | ||
==Pictures== | ==Pictures== | ||
Revision as of 22:10, 29 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 chronologically in "models." Models 1 thru 3 looked alike, while Model 4 got a redesigned enclosure like that used later by the Type 134.
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 bandwidth) |
| Lower frequency limit | 50 Hz |
| Delay time | 32 ns typ. |
(all specifications are overall values including the P6016 probe)
Internals
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 131 015-027 power supply 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 4 have no marking other than Tektronix and 015-027. All Type 131 power supplies have the AC line connector built onto the end of the power supply housing. Early 134 power supplies share the same construction, while later 134 power supplies came with a ~1 m AC line cord and plug.
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
