7A14

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Tektronix 7A14
120 MHz current probe amplifier
7A14

Compatible with 7000-series scopes

Produced from 1969 to 1975

Manuals


Manuals – Specifications – Links – Pictures

The Tektronix 7A14 is a 120 MHz current probe amplifier vertical plug-in for 7000 series, intended to be used with passive current probes such as the P6021 and P6022.

The 7A14 is one of the original plug-in modules introduced at the start of the 7000 series in 1969.

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. When connecting a P6019 probe, the ring must also be grounded but the probe connector does not have the matching pin. The 131-0750-00 adapter solves this problem.

The front panel gain control screwdriver adjustment affects gain for either P6021 or P6022, i.e. swapping probes requires re-adjustment.

Specifications

Deflection 1 mA/Div to 1 A/Div in 1–2–5 sequence
Bandwidth P6021: 25 Hz – 50 MHz (55 MHz in 79xx)

P6022: 250 Hz – 105 MHz (120 MHz in 79xx, 80 MHz in 76xx)

Links

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.

Prices

Year 1969 1974
Catalog price $575 $700
2021 value $4,260 $3,860

Pictures