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{{Instrument Sidebar
|manufacturer=Tektronix
|model=125
|class=Power supply
|series=
|summary=Power supply for the Type [[122]]
|image=Tek rm125 1.jpg
|caption=|RM125 Front
|introduced=1961
|discontinued=(?)
|designers=
|manuals=
* [[Media:070-246.pdf|Tektronix 122 and 125 Manual]]
}}
The '''Tektronix 125''' is a power supply [[introduced in 1961]] for the Type [[122]] preamplifier.   
The '''Tektronix 125''' is a power supply [[introduced in 1961]] for the Type [[122]] preamplifier.   
The 125 runs on wall power (mains) and provides three regulated outputs:
The 125 runs on wall power (mains) and provides three regulated outputs:
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* RM125 (rack mount, horizontal orientation, with wide front panel for mounting mounting in a standard 19" rack, later called "R125")
* RM125 (rack mount, horizontal orientation, with wide front panel for mounting mounting in a standard 19" rack, later called "R125")
* FM125 (frame mount, vertical orientation, for use in the [[014-002]] mounting frame, later called "F125")
* FM125 (frame mount, vertical orientation, for use in the [[014-002]] mounting frame, later called "F125")
==Manuals==
[http://bama.edebris.com/download/tek/122_125/Tek%20122_125.pdf Tektronix 122 and 125 Manual]


==Pictures==
==Pictures==
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</gallery>
</gallery>


{{Parts|125}}


[[Category:Accessory power supplies]]
[[Category:Accessory power supplies]]
[[Category:Introduced in 1961]]

Latest revision as of 16:30, 10 October 2021

Tektronix 125
Power supply for the Type 122

Produced from 1961 to (?)

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

The Tektronix 125 is a power supply introduced in 1961 for the Type 122 preamplifier. The 125 runs on wall power (mains) and provides three regulated outputs:

  • +135 VDC at 0-20 mA, 1 mV ripple, tube-based regulation
  • -90 VDC at 0-20 mA, 1 mV ripple, tube-based regulation
  • -6 VDC at 0.7-4 A, 4 mV ripple, transistor-based regulation

The +135 V section contains an OG3 voltage reference tube. The -90 V and -6 V sections use the +135 V supply as their reference. All power rectification is done with semiconductor diodes.

A calibration fixture, the 067-0528-00, exists for testing the 125.

The 125, like the 122, appears in three form factors:

  • 125 (standard, vertical orientation, no mounting ears)
  • RM125 (rack mount, horizontal orientation, with wide front panel for mounting mounting in a standard 19" rack, later called "R125")
  • FM125 (frame mount, vertical orientation, for use in the 014-002 mounting frame, later called "F125")

Pictures


Some Parts Used in the 125

Part Part Number(s) Class Description Used in
6G11 154-0660-00 Vacuum Tube (Pentode) double sharp cut-off beam power pentode 125 132 519 067-0502-01 050-0551-00
6GE8 154-0260-00 Vacuum Tube (Triode/Pentode) triode-pentode combo 125 132 560
7734 154-260 154-0260-00 Vacuum Tube (Triode/Pentode) triode-pentode combo 125 132