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131: Difference between revisions
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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 " | 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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{{EndSpecs}} | {{EndSpecs}} | ||
(all specifications are overall values including the P6016 probe) | (all specifications are overall values including the P6016 probe) | ||
==Connectors== | |||
All models of the 131 use a [[BNC]] input connector. | |||
The vast majority of 131s, including all the Models 1 thru 3, have a [[UHF]] connector for its output. 131 Model 4s with [[UHF]] outputs were Tektronix #015-0029-00. | |||
A few very late 131 Model 4s were supplied with a locking [[BNC]] output connector, as Tektronix #015-0050-00. | |||
==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]] for 115 V<sub>AC</sub>, 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. | 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. Damage to the amplifier itself is unlikely either way. | ||
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. | 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. | ||