E
The Tektronix Type E is a low-level differential amplifier plug-in for 500-series scopes. The sensitivity ranges from 50 μV/div to 10 mV/div. The input is an XLR connector feeding directly into the grids of a 12AX7 differential amplifier.
The Type E was mainly intended for biomedical applications.
Despite the DC-coupled input stage, the Type E is an AC-coupled amplifier. It has front panel knobs for selecting the low-frequency and high-frequency cutoff. It achieves a 50,000 to 1 common mode rejection ratio. Maximum bandwidth is 60 kHz. It has seven tubes, three of which are on a shock-mounted subchassis.
The Type 53E/54E was introduced in 1955. Along with Types G and K, it was the first plug-in offered after, not during, the original 531/535 introduction in 1954. The nomenclature was revised after just a few months, to 53/54E. In 1959, when the A-suffix mainframes came out, all plugins dropped the "53/54". The Type E was dropped after 1968; its replacement, the Type 1A7, had been available for a few years.
Hickok produced an unauthorized clone, the Hickok 1825.
Links
- Tektronix Type E @ radiomuseum.org
- Tektronix Type E / 53/54E @barrytech.com
Pictures
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Front
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Left
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schematic
Components
Some Parts Used in the E
| Part | Part Number(s) | Class | Description | Used in |
|---|---|---|---|---|
| 0B2 | 154-0075-00 | Gas Discharge Tube (Voltage regulator) | 105-108 V voltage reference | 110 • 190 • E • Hickok 1825 • Keithley 610 |
| 12AU7 | 154-041 • 154-0041-00 • 154-0287-00 | Vacuum Tube (Dual Triode) | dual medium-μ triode | 104 • 104A • 122 • 160 • 161 • 162 • 181 • 190 • 310 • 310A • 316 • 317 • 3C66 • 502 • 502A • 507 • 511A • 512 • 516 • 517 • 517A • 524 • 526 • 535 • 536 • 545 • 545A • 545B • 547 • 549 • 555 • 561 • 564 • 570 • 575 • 581 • 581A • 585 • 585A • C • D • E • N • Q • Hickok 1825 |
| 12AX7 | 154-043 • 154-0043-00 | Vacuum Tube (Dual Triode) | dual triode | 3C66 • 513 • 524 • 531 • 531A • 535 • 536 • 545 • 545A • 545B • 546 • 547 • 549 • 555 • 570 • 581 • 581A • 585 • 585A • E • Q • Hickok 1825 • Keithley 610 |
| 5751 | 154-0094-00 | Vacuum Tube (Dual Triode) | dual triode | E |
| 5879 | 154-0055-00 | Vacuum Tube (Pentode) | sharp-cutoff pentode | 112 • 512 • D • E • Hickok 1825 |