134

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 V_AC or 015-0059-00 for 230 V_AC, which had the male AC power plug built into the power supply body, just like the 131 Model 4 power supply.

Later production got the 015-0058-01 for 115 V_AC or the 015-0059-01 for 230 V_AC. These had a ~1 m cord and AC plug.

Both of these versions used a Tektronix 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	125 in P6019/P6021 switch position
Gain	50 for P6020/P6022 switch position
Bandwidth	10 Hz to 30 MHz in P6019/P6021 x120 mode
Bandwidth	8 Hz to 54 MHz in P6020/P6022 x50 mode

Links

• Tek 134 @ analogdesign.be (preserved at archive.org) − photos and description

Prices

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

Pictures

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  134 front, 1966−1969 model (P6019/P6020-only switch label)

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  134 front, 1969+ model

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  Schematic

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 V_p-p into 50 Ω = 100 mA_p-p.

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  100 Hz

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  1 kHz

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  10 kHz