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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: | ||
* + | * +135 V<sub>DC</sub> at 0-20 mA, 1 mV ripple, tube-based regulation | ||
* - | * -90 V<sub>DC</sub> at 0-20 mA, 1 mV ripple, tube-based regulation | ||
* - | * -6 V<sub>DC</sub> at 0.7-4 A, 4 mV ripple, transistor-based regulation | ||
The + | The +135 V section contains an [[OG3]] voltage reference tube. | ||
The - | The -90 V and -6 V sections use the +135 V supply as their reference. | ||
All power rectification is done with semiconductor diodes. | All power rectification is done with semiconductor diodes. | ||
| Line 16: | Line 16: | ||
* 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] | [http://bama.edebris.com/download/tek/122_125/Tek%20122_125.pdf Tektronix 122 and 125 Manual] | ||
==Pictures== | |||
<gallery> | <gallery> | ||
Tek 125 schem.png|Schematic | |||
Tek rm125 1.jpg|RM125 Front | |||
Tek rm125 2.jpg|RM125 Internal Top View | |||
Tek rm125 3.jpg|RM125 Internal Underside | |||
Tek rm125 4.jpg|RM125 Rear | |||
</gallery> | </gallery> | ||
Revision as of 14:16, 21 February 2017
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")
Manuals
Pictures
-
Schematic
-
RM125 Front
-
RM125 Internal Top View
-
RM125 Internal Underside
-
RM125 Rear
