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The Tektronix 513 is a single-channel monolithic oscilloscope with 18MHz bandwidth. | The Tektronix 513 is a single-channel monolithic oscilloscope with 18MHz bandwidth. | ||
It was announced in 1949 and [[introduced in 1950]]. It used a [[5XP]] CRT initially, | It was announced in 1949 and [[introduced in 1950]]. | ||
and then switched to a Tek-made CRT. | It used a [[5XP]] CRT initially, and then switched to a Tek-made CRT. | ||
It | It was the first Tektronix oscilloscope to contain a [[distributed amplifier]]. | ||
the first Tek scope to contain a [[delay line]] for the vertical signal, | It was also the first Tek scope to contain a [[delay line]] for the vertical signal, | ||
to allow viewing the leading edge of the event | to allow viewing the leading edge of the event that triggers the sweep. | ||
It was released at about the same time as the [[514]], | |||
which contains a much simpler,lower bandwidth distributed amplifier. | |||
The next scopes to use distributed amplifiers were | The next scopes to use distributed amplifiers were | ||
the [[517]] in 1951 and then the [[541]] and [[545]] in 1955. | the [[517]] in 1951 and then the [[541]] and [[545]] in 1955. | ||
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The input impedance is 1 Megohm in parallel with 40pF. | The input impedance is 1 Megohm in parallel with 40pF. | ||
The scope provides power to an optional cathode-follower probe. | |||
The 513D has a delay line; the 513 does not. | The 513D has a delay line; the 513 does not. | ||
The 513 | The 513 and 513D contain a distributed vertical output amplifier | ||
made of [[6CB6]] tubes. The 513 has no [[thermal cutoff]] and | made of [[6CB6]] tubes. The 513 has no [[thermal cutoff]] and | ||
uses [[selenium rectifiers]]. | uses [[selenium rectifiers]]. | ||