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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: | ||
| Line 15: | Line 29: | ||
* 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") | ||
==Pictures== | ==Pictures== | ||
| Line 28: | Line 39: | ||
</gallery> | </gallery> | ||
{{Parts|125}} | |||
[[Category:Accessory power supplies]] | [[Category:Accessory power supplies]] | ||
Latest revision as of 15:30, 10 October 2021
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
-
Schematic
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RM125 Front
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RM125 Internal Top View
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RM125 Internal Underside
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RM125 Rear
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 |