506: Difference between revisions
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{{Oscilloscope Sidebar| | {{Oscilloscope Sidebar |manufacturer=Tektronix |designers=|series=560-series scopes| | ||
model= 506 | | |||
summary=20 MHz scope | | summary=20 MHz scope | | ||
image=Tek 506 trace.jpg | | image=Tek 506 trace.jpg | | ||
Line 7: | Line 7: | ||
discontinued = (?) | | discontinued = (?) | | ||
manuals= | manuals= | ||
* [ | * [[Media:070-445.pdf|Tektronix 506 Manual]] (PDF) | ||
* [[Media:Tek 506 mod 129b.pdf|Tektronix 506 Mod 129B (PDF, needs OCR)]] | * [[Media:Tek 506 mod 129b.pdf|Tektronix 506 Mod 129B (PDF, needs OCR)]] | ||
}} | }} | ||
The '''Tektronix Type 506''' is an oscilloscope with bandwidth above 20 MHz that uses | The '''Tektronix Type 506''' is an oscilloscope with bandwidth above 20 MHz that uses [[560-series plug-ins|560-series horizontal plug-ins]] but special high-speed vertical plug-ins, the [[9A1]], and [[9A2]]. | ||
[[560-series plug-ins|560-series horizontal plug-ins]] but special high-speed vertical plug-ins, the [[9A1]], and [[9A2]]. | |||
Like the scopes in the [[560-series_scopes|560 Series]], | Like the scopes in the [[560-series_scopes|560 Series]], the 506 mainframe contains neither vertical nor horizontal amplifiers; the plug-ins directly drive the CRT deflection plates. | ||
the 506 mainframe contains neither vertical nor horizontal amplifiers; | |||
the plug-ins directly drive the CRT deflection plates. | |||
{{MissingSpecs}} | {{MissingSpecs}} | ||
The 506 uses the [[T5033|T5033-31-1]] CRT, which has P31 [[phosphor]]. | The 506 uses the [[T5033|T5033-31-1]] CRT, which has P31 [[phosphor]]. It uses no post-deflection acceleration, total accelerating voltage is 3.5 kV. | ||
It uses no post-deflection acceleration, total accelerating voltage is 3.5 kV. | |||
==Internals== | ==Internals== | ||
The CRT circuit uses two [[5642]] high-voltage rectifier tubes, | The CRT circuit uses two [[5642]] high-voltage rectifier tubes, one for the CRT cathode voltage and one for the intensification voltage, which is applied to a second grid in the CRT. | ||
one for the CRT cathode voltage and one for the intensification voltage, | |||
which is applied to a second grid in the CRT. | |||
The calibrator signal is produced by shaping mains frequency into a square wave. | The calibrator signal is produced by shaping mains frequency into a square wave. | ||
It is not just a simple clipping circuit. To speed up the edges, positive feedback is used. | It is not just a simple clipping circuit. To speed up the edges, positive feedback is used. | ||
A cross-connected triode and pentode form a schmitt trigger. | A cross-connected triode and pentode form a schmitt trigger. | ||
The input of the shaping circuit is the cathode of the triode | The input of the shaping circuit is the cathode of the triode and the output is the cathode of the pentode, which drives a voltage divider whose tap is selected by the front panel calibrator rotary switch. | ||
and the output is the cathode of the pentode, which drives a | |||
voltage divider whose tap is selected by the front panel calibrator rotary switch. | |||
The power supply is fairly typical of Tektronix scopes of the period. | The power supply is fairly typical of Tektronix scopes of the period. | ||
An [[OG3]] tube establishes a −82 V reference voltage in the −100 V power supply section. | An [[OG3]] tube establishes a −82 V reference voltage in the −100 V power supply section. | ||
The −100 V supply is then used as the reference voltage for the other power supply sections. | The −100 V supply is then used as the reference voltage for the other power supply sections. | ||
Output tubes are used for all of the regulated supply voltages except the −12.2 V supply, | Output tubes are used for all of the regulated supply voltages except the −12.2 V supply, which uses a [[2N1529]] germanium PNP transistor. | ||
which uses a [[2N1529]] germanium PNP transistor. | |||
==Pictures == | ==Pictures == |
Revision as of 12:27, 20 August 2021
The Tektronix Type 506 is an oscilloscope with bandwidth above 20 MHz that uses 560-series horizontal plug-ins but special high-speed vertical plug-ins, the 9A1, and 9A2.
Like the scopes in the 560 Series, the 506 mainframe contains neither vertical nor horizontal amplifiers; the plug-ins directly drive the CRT deflection plates.
Key Specifications
- please add
The 506 uses the T5033-31-1 CRT, which has P31 phosphor. It uses no post-deflection acceleration, total accelerating voltage is 3.5 kV.
Internals
The CRT circuit uses two 5642 high-voltage rectifier tubes, one for the CRT cathode voltage and one for the intensification voltage, which is applied to a second grid in the CRT.
The calibrator signal is produced by shaping mains frequency into a square wave. It is not just a simple clipping circuit. To speed up the edges, positive feedback is used. A cross-connected triode and pentode form a schmitt trigger. The input of the shaping circuit is the cathode of the triode and the output is the cathode of the pentode, which drives a voltage divider whose tap is selected by the front panel calibrator rotary switch.
The power supply is fairly typical of Tektronix scopes of the period. An OG3 tube establishes a −82 V reference voltage in the −100 V power supply section. The −100 V supply is then used as the reference voltage for the other power supply sections. Output tubes are used for all of the regulated supply voltages except the −12.2 V supply, which uses a 2N1529 germanium PNP transistor.
Pictures
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Power Supply
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CRT Circuit
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Calibrator
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Interconnecting Sockets