P6021

P6021 with passive termination box

The Tektronix P6021 is a 125-turn AC current probe for oscilloscopes. It can be used with the included passive termination, a type 134 current probe amplifier, or a 3A9 or 7A14 current probe amplifier scope plug-in.

Bandwidth is up to 52 MHz.

The P6021 has a contact to short the ring around the 7A14's BNC input to ground, to switch termination and gain.

The sister model P6022 has higher bandwidth but also a higher LF cut-off frequency and lower peak current rating.

Specifications

	P6021 passive	P6021 + 134	P6021 + 7A14	P6022 passive	P6022 + 134	P6022 + 7A14
Sensitivity	2 mA/mV or 10 mA/mV	1 mA/Div to 1 A/Div (scope @ 50 mV/Div)	1 mA/Div to 1 A/Div	1 mA/mV or 10 mA/mV	1 mA/Div to 1 A/Div (scope @ 50 mV/Div)	1 mA/Div to 1 A/Div
Bandwidth (-3 dB)	60 MHz @ 10 mA/mV	> 40 MHz	50 MHz	200 MHz @ 10 mA/mV	> 70 MHz	105 MHz
LF limit (-3 dB)	450 Hz @ 2 mA/mV 120 Hz @ 10 mA/mV	< 12 Hz	25 Hz	8500 Hz @ 1 mA/mV 935 Hz @ 10 mA/mV	< 100 Hz	250 Hz
Maximum current	15 Ap-p			6 Ap-p (> 10 kHz @ 1 mV/mA, > 3 kHz @ 10 mV/mA, < 10 MHz)

Manuals

• Tektronix P6021 Manual (PDF), earlier version with termination schematics
• Tektronix P6021 Manual (PDF), no schematics
• Description in 1971 Catalog (PDF)

Prices

Year	1974
Catalog price	$100
2017 value	$500

Pictures

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  Tektronix P6021 with passive termination box

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  P6021 catalog image

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  P6021A

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  Schematic (click to enlarge)

Measurement examples

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  Measuring diode reverse recovery

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  BAT41 diode reverse recovery, 20 mA/Div

Comparison of P6022 with passive termination @ 10 mA/Div (top trace) vs. P6021+134 (bottom trace).
The a signal shown 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