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131: Difference between revisions
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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]] 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. | 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. Damage to the amplifier itself is unlikely either way. | 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. | ||
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==Pictures== | ==Pictures== | ||
<gallery> | <gallery> | ||
Tek_p6016_131_3.jpg | Type 131 Model 3 Front | Tek_p6016_131_3.jpg | Type 131 Model 3 Front | ||
Tek_p6016_131_2.jpg | Type 131 Model 3 with P6016 | Tek_p6016_131_2.jpg | Type 131 Model 3 with P6016 | ||
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, with UHF to BNC adaptor | ||
Tek 131 early 3.jpg|Type 131 Model 3 | Tek 131 early 3.jpg|Type 131 Model 3 | ||
Tek 131 early 4.jpg|Type 131 Model 3 | Tek 131 early 4.jpg|Type 131 Model 3 | ||
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Tek 131 early 6.jpg|Type 131 Model 3 | Tek 131 early 6.jpg|Type 131 Model 3 | ||
Tek 131 early 7.jpg|Type 131 Model 3 | Tek 131 early 7.jpg|Type 131 Model 3 | ||
Tek 131 schem.png|Type 131 Schematic, Models 1-3 | |||
Tek 131 front.jpg | Type 131 Model 4 Front | |||
Tek 131 side.jpg | Type 131 Model 4 Side View | |||
</gallery> | </gallery> | ||
[[Category:Oscilloscope current probes]] | [[Category:Oscilloscope current probes]] | ||