7A14

The Tektronix 7A14 is a 120 MHz current probe amplifier vertical plug-in for 7000-series scopes. It is intended for current probes P6021 and P6022.

In the 7A14, the ring around the input BNC connector that is used to identify ×10/×100 probes on voltage probes serves the purpose of detecting the difference between the P6021 and P6022 probes, and switching in appropriate gain and frequency compensation. The P6021 shorts this ring to ground, directly switching three relays connected to -15 V internally.

The front panel gain control screwdriver adjustment affects gain for either P6021 or P6022.

Specifications

• Bandwidth: 25 Hz – 50 MHz (P6021 Probe)
• Bandwidth: 250 Hz – 105 MHz (P6022 Probe)
• Ranges: 1 mA/Div to 1 A/Div in 1–2–5 sequence

Links

• Tek 7A14 @ barrytech.com

Internals

The 7A14 uses twelve Tek-made miniature relays that can be a service issue.

The amplifier is an 8-stage discrete differential design. The plug-in contains no integrated circuits.

Pictures

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  7A14 front panel

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  7A14, left side

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  7A14, right side

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