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The '''Tektronix Type 506''' is an oscilloscope with bandwidth above 20 MHz that uses
{{Oscilloscope Sidebar |manufacturer=Tektronix |designers=|series=560-series scopes|
[[560-series plug-ins|560-series horizontal plug-ins]]
model= 506 |
but special high-speed vertical plug-ins, the [[9A1]], and [[9A2]].
summary=20 MHz scope |
image=Tek 506 trace.jpg |
caption =506 with [[9A1]] and [[3B1]] |
introduced = 1964 |
discontinued = (?) |
manuals=
* [[Media:070-445.pdf|Tektronix 506 Manual]] (PDF)
* [[Media:Tek 506 mod 129b.pdf|Tektronix 506 Mod 129B (PDF, needs OCR)]]


Like the scopes in the [[560-series_scopes|560 Series]],
}}
the 506 mainframe contains neither vertical nor horizontal amplifiers;
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]].
the plug-ins directly drive the CRT deflection plates.


The CRT does not use post-deflection acceleration.
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 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 506 uses the [[T5033|T5033-31-1]] CRT, which has P31 [[phosphor]]. 
The total accelerating voltage is 3.5kV.  


The calibrator signal is produced by shaping mains frequency
{{MissingSpecs}}
into a square wave.
 
It is not just a simple clipping circuit.
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.
To speed up the edges, positive feedback is used.
 
==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.
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 -82V reference voltage in the -100V power supply section.
An [[OG3]] tube establishes a −82 V reference voltage in the −100 V power supply section.
The -100V 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 -12.2V 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.
 
* [http://w140.com/tek_506_Manual_070-445_Aug_1964.pdf Tektronix 506 Manual (PDF)]


==Pictures ==
<gallery>
<gallery>
Tek 506 trace.jpg|506 with [[9A1]] and [[3B1]]
Tek 506 trace.jpg|506 with [[9A1]] and [[3B1]]
File:Tek 506 331023143159.jpg
Tek 506 331023143159.jpg
File:Tek_506_power_supply.png|Power Supply
Tek_506_power_supply.png|Power Supply
File:Tek_506_crt_circuit.png|CRT Circuit
Tek_506_crt_circuit.png|CRT Circuit
File:Tek 506 calibrator.png|Calibrator
Tek 506 calibrator.png|Calibrator
File:Tek 506 interconnecting.png|Interconnecting Sockets
Tek 506 interconnecting.png|Interconnecting Sockets
</gallery>
</gallery>



Revision as of 12:27, 20 August 2021

Tektronix 506
20 MHz scope
506 with 9A1 and 3B1

Produced from 1964 to (?)

Manuals
(All manuals in PDF format unless noted otherwise)
Manuals – Specifications – Links – Pictures

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