125

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Tektronix 125
Power supply for the Type 122

Produced from 1961 to (?)

Manuals
(All manuals in PDF format and OCRed 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
0G3 154-0291-00 Gas Discharge Tube (Voltage regulator) 85 V voltage reference 125 132 506 547 560 561 561A 561S 564 565 567 661 TU-4 Z Keithley 610 Keithley 660A
6BA8A 154-0163-00 Vacuum Tube (Triode/Pentode) triode-pentode combo 59 125 3A72 526
6BL8 154-0278-00 Vacuum Tube (Triode/Pentode) triode-pentode combo 67 125 129 2B67 3B1 3B1S 3B2 3B3 3B4 503 504 506 516 549 561 561A 561S 564 565 567 Telequipment D52 Telequipment D56 Telequipment S31 Telequipment S32 Telequipment S32A Telequipment S51 Telequipment S52
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