134

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Tektronix 134
current probe amplifier
Tek 134 front

Produced from 1966 to (?)

Manuals
Manuals – Specifications – Links – Pictures

The Tektronix 134 current probe amplifier interfaces a P6019, P6020, P6021 or P6022 current probe to the voltage input of an oscilloscope. It was designed by Hans Springer.

Each 134 came with its own dedicated power supply. Early production 134s came with a 015-0058-00 for 115 VAC or 015-0059-00 for 230 VAC, which had the male AC power plug built into the power supply body, the same as the 131 power supply.

Later production got the 015-0058-01 for 115 VAC or the 015-0059-01 for 230 VAC. These had a ~1 m cord and AC plug. Both of these versions used a proprietary coaxial connector on the supply.

The latest version of the 134 power supply appears to be a Tektronix branded wall wart with an AC line cord and output to an inline connector.

Key Specifications

Current range 1 mA/Div to 1 A/Div, 1−2−5 (scope at 50 mV/Div)
Gain 50 or 125 (selectable)
Bandwidth 8 Hz to 54 MHz @ gain 50, 10 Hz to 30 MHz @ gain 125

Links

Prices

Year 1970 1974 1984 1986
Catalog price $209 $265 $625 $625
In 2022 Dollars $1,600 $1,600 $1,800 $1,700

Pictures

Measurements

Comparison of P6022 with passive termination @ 10 mA/Div (top trace) vs. P6021+134 (bottom trace). Signal is a sawtooth from a HP3325A @ 5 Vp-p into 50 Ω = 100 mAp-p.