513

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The Tektronix 513 is a single-channel monolithic oscilloscope with 18MHz bandwidth. The input impedance is 1 Megohm in parallel with 40pF. It provides power to an optional cathode-follower probe. The 513D has a delay line; the 513 does not. The 513 (and 513D) contains a distributed vertical output amplifier made of 6CB6 tubes.