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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. | ||
531s with below S/N 7950 have DuMont [[154-081|5BGP2]] instead of Tektronix [[ | 531s with below S/N 7950 have DuMont [[154-081|5BGP2]] instead of Tektronix [[T5330|T533P2]]. | ||
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. |