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and [[introduced in 1959|superseded in 1959]] by the Type 531A, | and [[introduced in 1959|superseded in 1959]] by the Type 531A, | ||
which has more convenient controls and a slightly faster (15 MHz) vertical amplifier. | which has more convenient controls and a slightly faster (15 MHz) vertical amplifier. | ||
In serial numbers 101 to 7600, the 531's L-C [[delay line]] is before the vertical amplifier. | In serial numbers 101 to 7600, the 531's L-C [[delay line]] is before the vertical amplifier. |