P6042
The Tektronix P6042 is a DC to 50 MHz current probe introduced in 1967. It was designed by Cal Hongel.
The sensor contains a current transformer for HF and a hall effect sensor for LF/DC components. The amplifier combines DC/LF and HF signals.
The AM503, introduced about a decade later, is a redesign of the P6042 with removable probes.
Key Specifications
Bandwidth | DC to 50 MHz (−3 dB) |
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Rise time | 7 ns |
Ranges | 1 mA/div to 1 A/div (1–2–5) with scope in 50 mV/div |
Output | to 50 Ω scope input at 50 mV/div |
Maximum input | 10 A DC+peak AC in 5 mA to 1 A ranges, 0.5 A in 1 mA and 2 mA ranges |
Power | 90-136 or 180-272 V, 20 W |
Internals
Locking the probe requires pushing past the resistance felt when the core almost closes. This engages a mechanism that firmly presses both core halves together, and extinguishes the "Probe unlocked" indicator.
The P6042's core halves are precision lapped and potted with epoxy. They have Mu-metal screening. The lower (fixed) core also contains the Hall element. Unfortunately, the P6042 probe is quite sensitive mechanically, and in many units offered for sale, the cores are damaged.
Prices
- $525 in 1967 (~$5,500 in 2022 Dollars)
Links
Pictures
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amplifier front
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amplifier and sensor
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sensor detail
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rear view
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catalog image
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P6042 amplifier internal view
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P6042 amplifier internal view
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P6042 amplifier internal view