120-0140-00
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The Tektronix 120-0140-00 (P/N 120-0140-00,120-140) is a power transformer used in the 533A and 543A (SN 3001 and up).
It has dual primaries that can be wired for 117 V or 234 V, plus trim windings for low (110 V/220 V) or high range (124 V/248 V).
In the 533/543 (SN 101-3000), transformers were 120-037 for domestic, 120-086 for export. Some manuals say 120-037 is 117 V and 120-086 is 234 V but this is false; both transformers are dual-voltage.
120-0140-00 was also used in late production of Types 531A, 535A, 541A, and 545A.
Some instruments using part 120-0140-00
| Instrument | Manufacturer | Class | Description | Introduced |
|---|---|---|---|---|
| 531A | Tektronix | Oscilloscope | 10 MHz oscilloscope | 1960 |
| 533A | Tektronix | Oscilloscope | 15 MHz oscilloscope | (?) |
| 535A | Tektronix | Oscilloscope | 10 (15) MHz dual-timebase scope | 1959 |
| 541A | Tektronix | Oscilloscope | 30 MHz oscilloscope | 1959 |
| 543A | Tektronix | Oscilloscope | 30 MHz oscilloscope | (?) |
| 545A | Tektronix | Oscilloscope | 30 (33) MHz oscilloscope | 1959 |
