7A15

The 7A15 is a single channel, 80 MHz general-purpose vertical amplifier for 7000-series scopes. The AM-6565/U (aka 7A15N11) is the military version of this amplifier. A Department of the Army Technical Bulletin (see links section) suggests that it was used with the 7603 and its military version (the AN/USM 281C).

The 7A15A is a fully discrete design (i.e. no integrated circuits), built mostly from BJTs, with a 151-1032-00 dual JFET as the front-end buffer.

Key Specifications

Bandwidth	0 – 80 MHz (DC), 1 Hz – 80 MHz (AC)
Deflection	5 mV/Div to 10 V/Div in 1–2–5 sequence
Input impedance	1 MΩ // 20 pF
Features	×10 switch to extend sensitivity to 0.5 mV/Div (at 10 MHz bandwidth) Invert switch Probe ×10/Identify sensing input

Links

• 7A15 @ barrytech.com
• Army Bulletin TB_9-6625-2024-35 (2002)

Pictures

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  7A15A

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  7A15A

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  AM-6565/U

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  AM-6565/U

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  AM-6565/U

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  AM-6565/U

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  Early 7A15