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Revision as of 09:41, 10 October 2018

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[[File:181_PC_ISO.jpg|thumb|350px|right|181, early version]]
The '''Tektronix Type 181''' is a time mark generator [[introduced in 1955]].  There is a benchtop version,
The '''Tektronix Type 181''' is a time mark generator [[introduced in 1955]].  There is a benchtop version,
the 181, and a rackmount version, the RM181. MOD 110 substitutes a oven-stabilized
the 181, and a rackmount version, the RM181. MOD 110 substitutes a oven-stabilized
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A 181 with the OCXO mod is a "181 S1".
A 181 with the OCXO mod is a "181 S1".


==Manuals ==
* [[Media:070-292.pdf|Tektronix 181 Manual (sn 6917, color schematics, PDF)]]
* [http://w140.com/mmm/tek-181.pdf Tektronix 181 Manual (PDF)]
==Internals ==
Internally, the 181 is similar to the [[180A|180]].   
Internally, the 181 is similar to the [[180A|180]].   
The oscillator drives a chain of synchronized monostable multivibrators.
The oscillator drives a chain of synchronized monostable multivibrators.
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the reference oscillator.  
the reference oscillator.  


The power supply of the 181 produces +300 V and -150 V regulated voltages and  
The power supply of the 181 produces +300 V and −150 V regulated voltages and  
+400 V, -8 V, and -25 V unregulated.  The voltage reference is a [[5651]] tube.
+400 V, −8 V, and −25 V unregulated.  The voltage reference is a [[5651]] tube.
The output tubes for both regulators are [[12B4]] and the feedback amplifier
The output tubes for both regulators are [[12B4]] and the feedback amplifier
tubes are [[6AU6]].  The 181 does not contain a fan or a [[thermal cutoff]].
tubes are [[6AU6]].  The 181 does not contain a fan or a [[thermal cutoff]].


* [[Media:070-292.pdf|Tektronix 181 Manual (sn 6917, color schematics, PDF)]]
==Pictures ==
* [http://w140.com/mmm/tek-181.pdf Tektronix 181 Manual (PDF)]
 
<gallery>
<gallery>
File:Tek 181.jpg|181
Tek 181.jpg|181
File:Tek rm181.jpg|RM181
Tek rm181.jpg|RM181
File:181_PC_ISO.jpg|181, early version
181_PC_ISO.jpg|181, early version
File:181_PC_Front.jpg|181, early version, front
181_PC_Front.jpg|181, early version, front
File:181_PC_Left.jpg|181, early version, left side
181_PC_Left.jpg|181, early version, left side
File:181_PC_Right.jpg|181, early version, right side
181_PC_Right.jpg|181, early version, right side
File:Tek co181.jpg|CO181 oven-stabilized oscillator
Tek co181.jpg|CO181 oven-stabilized oscillator
File:Tek 181 block.png|Block diagram
Tek 181 block.png|Block diagram
File:Tek 181 oscillator and multiplier.png|oscillator and multiplier
Tek 181 oscillator and multiplier.png|oscillator and multiplier
File:Tek 181 frequency dividers.png|frequency dividers
Tek 181 frequency dividers.png|frequency dividers
File:Tek 181-switching detail.png|switching detail
Tek 181-switching detail.png|switching detail
File:Tek 181 power supply.png|power supply
Tek 181 power supply.png|power supply
File:Tek rm181 1us output2.jpg|Output waveform of RM181 set for 1 us period.
Tek rm181 1us output2.jpg|Output waveform of RM181 set for 1 us period
Tek 181 later style rounded case.jpg|Later style case, rounded corners.
Tek 181 later style rounded case.jpg|Later style case, rounded corners
Tek 181 left internal on.jpg|Left internal view, powered up.
Tek 181 left internal on.jpg|Left internal view, powered up
</gallery>
</gallery>


[[Category:Pulse generators]]
[[Category:Pulse generators]]
[[Category:Introduced in 1955]]
[[Category:Introduced in 1955]]
Retrieved from "https://w140.com/tekwiki/wiki/Special:MobileDiff/37364"

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