300-series scopes
The 300 series of oscilloscopes from Tektronix includes:
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305 - 5 MHz 2-ch scope with battery, DMM (1979 – 1991)
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314 — 10 MHz 2-ch storage scope (1975 – 1991)
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321 — 5 MHz portable (1960 – 1972)
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323 — 4 MHz scope with battery (1969 – 1978)
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324 — 10 MHz scope with battery (1971 – 1978)
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326 — 10 MHz 2-ch scope with battery (1972 – 1978)
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335 — Dual-trace 35 MHz compact scope (1976 – ?)
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336 — Dual-trace 50 MHz compact scope (1984 – 1992)