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It was designed by Tektronix engineers [[Bob Davis]] and [[Dick Rhiger]]. | It was designed by Tektronix engineers [[Bob Davis]] and [[Dick Rhiger]]. | ||
Using a three-section | Using a three-section [[distributed amplifier]], it provides frequency response from DC to 10 MHz. | ||
Prior to the 514, customers had to choose between an instrument with 10 MHz bandwidth (the [[511]]) ''or'' an instrument with DC response (the [[512]]). | Prior to the 514, customers had to choose between an instrument with 10 MHz bandwidth (the [[511]]) | ||
''or'' an instrument with DC response (the [[512]]). The 514 provides DC response ''and'' 10 MHz bandwidth. | |||
It weighs 60 pounds (27 kg) and consumes 360 W. | It weighs 60 pounds (27 kg) and consumes 360 W. | ||
The 514 uses a [[5CPA]] CRT with a total accelerating voltage of 3000 V | The 514 uses a [[5CPA]] CRT with a total accelerating voltage of 3000 V | ||
(-1.5 kV on the CRT cathode and +1.5 kV on the CRT anode) . | (-1.5 kV on the CRT cathode and +1.5 kV on the CRT anode) . | ||
The standard [[phosphor]] for a 514 was P1. | The standard [[phosphor]] for a 514 was P1. | ||
The deflection sensitivity of the CRT is approximately | The deflection sensitivity of the CRT is approximately 27 V/cm vertical and 32 V/cm horizontal. | ||
27 V/cm vertical and 32 V/cm horizontal. | |||
The power supply is regulated based on a -140 V reference produced by a [[OD3]] gas regulator tube. | The power supply is regulated based on a -140 V reference produced by a [[OD3]] gas regulator tube. | ||
The +225 V supply uses three [[5V4G]] rectifier tubes in parallel. | The +225 V supply uses three [[5V4G]] rectifier tubes in parallel. | ||
Throughout its production run, a 'D' variant was available (514D, with the 'D' being stamped in by hand on some models) which has a 24-section 250 ns lumped L-C [[delay line]]. | Throughout its production run, a 'D' variant was available (514D, with the 'D' being stamped in by hand | ||
on some models), which has a 24-section 250 ns lumped L-C [[delay line]]. | |||
There was also an 'A' version (514-A & 514-AD respectively), which appears to have been available in 1954. | There was also an 'A' version (514-A & 514-AD respectively), which appears to have been available in 1954. | ||
''(There were also some models marked 'Series A', which may have been a predecessor to the 514A? | ''(There were also some models marked 'Series A', which may have been a predecessor to the 514A? | ||
How does the 514AD differ from the 514D?)'' | |||
It has no [[thermal cutoff]]. | It has no [[thermal cutoff]]. |