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The '''Tektronix 105''' is a 25 Hz to 1 MHz square wave generator.   
{{Instrument Sidebar
It is all tube.  The 105 has a d'Arsonval meter on its front panel indicating the current frequency.
|manufacturer=Tektronix
|model=105
|class=Signal generator
|series=
|summary=25 Hz to 1 MHz square wave generator
|image=Tek_105_front.jpg
|caption=
|introduced=1950
|discontinued=(?)
|designers=Howard Vollum;Charles Sanford
|manuals=
* [[Media:070-049.pdf|Tektronix 105 Manual]]
* [[Media:Tek type 105 field recal proc.pdf|Tektronix 105 Field Recalibration Procedure]] (OCR)
* [[Media:Tek 105 fcp.pdf|Tektronix 105 Factory Calibration Procedure]] (OCR)
}}
The '''Tektronix 105''' is a 25 Hz to 1 MHz square-wave generator.   
It was designed by [[Howard Vollum]] and [[Charles Sanford]] and has an all-tube construction.


The 105 has a d'Arsonval meter on its front panel indicating the current frequency.
The frequency meter works on the principle of moving a constant amount of charge per cycle, integrating this charge into a current, and measuring the current.
The frequency meter works on the principle of moving a constant amount of charge per cycle, integrating this charge into a current, and measuring the current.


It was designed by [[Howard Vollum]] and Charles Sanford.
The output is generated at the plates of three [[6AG7]] triodes that run in parallel.


* [http://bama.edebris.com/download/tek/105/105.djvu Tektronix 105 Manual (PDF)]
{{BeginSpecs}}
* [http://w140.com/tek_fcp/tek_type_105_field_recal_proc.pdf Tektronix 105 Field Recalibration Procedure (PDF)]
{{Spec|Frequency|25 Hz to 1 MHz}}
{{Spec|Rise and fall time|20 ns (10% to 90%) }}
{{Spec|Amplitude|10 V to 100 V<sub>p-p</sub> (internal 600 Ω load); 1.5 V to 15 V<sub>p-p</sub> (external 93 Ω load) }}
{{Spec|Power|250 W}}
{{Spec|Weight|35 pounds}}
{{EndSpecs}}
 
==Pictures==


<gallery>
<gallery>
File:Tek 105 blockdiag.png|Block diagram
Tek 105 front.jpg |105 front
File:Tek 105 power supply.png|Power supply schematic
Tek 105 early.jpg|Early style of 105 with blocky meter
File:Tek 105 generator and meter.png|Generator schematic
Tek 105 on.jpg
Tek 105 on2.jpg
Tek 105 rear.jpg
Tek 105 manual.jpg|manual
Tek 105 on.jpg|powered on
Tek 105 tube side.jpg|internal view, tube side
105-rightInterior.jpg| right interior
Tek 105 output section.jpg|output section detail
Tek 105 waveform.jpg|output waveform of 105
Tek 105 blockdiag.png|Block diagram
Tek 105 power supply.png|Power supply schematic
Tek 105 generator and meter.png|Generator schematic
Early tek 105.jpg|Early Tek 105 with horizontal case
Tek 105 early power light low.jpg|Early Tek 105 with power light below switches
</gallery>
</gallery>
==Components==
{{Parts|105}}


[[Category:Pulse generators]]
[[Category:Pulse generators]]
[[Category:Introduced in 1950]]

Latest revision as of 06:45, 18 June 2024

Tektronix 105
25 Hz to 1 MHz square wave generator

Produced from 1950 to (?)

Manuals
Manuals – Specifications – Links – Pictures

The Tektronix 105 is a 25 Hz to 1 MHz square-wave generator. It was designed by Howard Vollum and Charles Sanford and has an all-tube construction.

The 105 has a d'Arsonval meter on its front panel indicating the current frequency. The frequency meter works on the principle of moving a constant amount of charge per cycle, integrating this charge into a current, and measuring the current.

The output is generated at the plates of three 6AG7 triodes that run in parallel.

Key Specifications

Frequency 25 Hz to 1 MHz
Rise and fall time 20 ns (10% to 90%)
Amplitude 10 V to 100 Vp-p (internal 600 Ω load); 1.5 V to 15 Vp-p (external 93 Ω load)
Power 250 W
Weight 35 pounds

Pictures

Components

Some Parts Used in the 105

Part Part Number(s) Class Description Used in
6AG7 154-012 154-0012-00 Vacuum Tube (Pentode) 9 Watt power pentode 104 104A 105 112 511 511A 512 513 514 517 517A 524
6CB6A 154-0030-00 Vacuum Tube (Pentode) pentode 105 112 316 317 503 504 513 517 517A 541 535 545 63 2A63