7704
The Tektronix 7704 is a 150 MHz, four-bay mainframe introduced in August 1969 that can take two 7000-series vertical plug-ins and two 7000-series horizontal plug-ins. The 7704 is one of the initial oscilloscopes introducing the 7000-Line and very lavishly built, using contacts embedded in the aluminium frame for interconnecting the gold plated circuit boards. It also features the 7000-series remote control connector on the rear panel.
It was superseded by the completely redesigned 7704A in 1973. There is also a rack-mount version, the R7704, that was produced until 1985, still with the original specifications (150 MHz) of the 7704.
Key Specifications
| Fastest cal. sweep | 2 ns/Div |
|---|---|
| Bandwidth | 150 MHz (with 7A11 or 7A16) |
| Calibrator | 4 mV to 40 V in decade steps (2/20/200/400 mV into 50 Ω); 40 mA; 1 kHz |
| Outputs | Vertical Signal Out (25 mV/Div, 60 MHz), +Sawtooth, +Gate, Cal, camera power, probe power |
| Z Axis input | two: High Speed (60 Vp-p, DC−100 MHz), High Sensitivity (2 Vp-p, DC−2 MHz; 0.4 Vp-p @ 20 MHz) |
| CRT | 154-0609-00, 8 cm × 10 cm graticule, distributed vertical deflection plates, P31 phosphor standard |
| Acceleration voltage | 24 kV (+21/−2.96) |
| Power | 90−136 V or 180−272 V, 48−440 Hz, 210 W max. |
| Weight | 19.1 kg (42 lbs) |
| Size | 34.2 cm × 30.5 cm × 55.1 cm (H×W×L) |
Internals
The 7704 was the first Tek lab scope to employ a switch-mode power supply (SMPS)[1]. The SMPS, designed by Gene Andrews, uses an all-discrete resonant half-bridge topology. The CRT voltages and heating are produced in a separate switching stage running off the main SMPS DC output.
Logic, channel switching, and readout use the classic TEK 7000 series custom ICs (155-0009-00 to 155-0022-00), the vertical amplifier (also designed by Andrews) and the horizontal amplifier are completely discrete.
Links
References
- ↑ See Tekscope Vol.4 No.2, March 1972, p.5
Pictures
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7704 front
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7704 rear
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7704 CRT and controls
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Left internal
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Right internal
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Left side of 7704 contains power supply
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Right side of 7704 contains readout circuitry
R7704
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R7704 front
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R7704 front left (Screen)
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R7704 front right (plugin bay)
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R7704 rear
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R7704 rear left
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R7704 rear right
Components
Some Parts Used in the 7704
| Part | Part Number(s) | Class | Description | Used in |
|---|---|---|---|---|
| 155-0009-00 | 155-0009-00 | Monolithic integrated circuit | horizontal lockout logic | 7504 • 7514 • 7704 • 7704A • R7704 • 7834 • 7844 • 7854 • 7904 • R7903 • 7904A • 7934 • 7104 |
| 155-0010-00 | 155-0010-00 | Monolithic integrated circuit | chop divider and blanking | 7504 • 7514 • 7704 • R7704 • 7704A • 7834 • 7854 • 7904 • R7903 • 7904A • 7934 • 7104 |
| 155-0011-00 | 155-0011-00 | Monolithic integrated circuit | clock and chop blanking | 485 • 7313 • 7403N • R7403N • 7503 • 7504 • 7514 • 7603 • AN/USM-281C • 7613 • 7623 • 7623A • 7633 • 7704 • R7704 • 7704A • 7834 • 7844 • 7854 • 7904 • 7904A • R7903 • R7912 • 7912AD • 7912HB • 7934 • 7104 • R7103 • AN/USM-281C |
| 155-0012-00 | 155-0012-00 | Monolithic integrated circuit | Z Axis Logic | 485 • 7504 • 7514 • 7704 • R7704 • 7704A • 7834 • 7844 • 7854 • 7904 • R7903 • 7904A • R7912 • 7934 • 7912AD • 7912HB • 7104 • R7103 |
| 155-0013-00 | 155-0013-00 • 155-0013-01 | Monolithic integrated circuit | horizontal chop and alt. binary | 7504 • 7514 • 7704 • R7704 • 7704A • 7834 • 7854 • 7904 • 7904A • R7903 • 7934 • 7104 |
| 155-0022-00 | 155-0022-00 • 155-0022-01 | Monolithic integrated circuit | analog multiplexer | 147 • 148 • 149 • 335 • 468 • 1430 • 1441 • 1461 • 1900 • 1910 • 2220 • 2221 • 2230 • 5223 • 5403 • 5440 • 5441 • 5443 • 5444 • 5A38 • 7313 • 7403N • 7503 • 7504 • 7514 • 7603 • AN/USM-281C • 7613 • 7623 • 7623A • 7633 • 7704 • R7704 • 7704A • 7834 • 7844 • 7854 • R7912 • 7912AD • 7912HB • 7904 • R7903 • 7904A • 7934 • 7A12 • 7A18 • 7A18A • 7A18N • 7B52 • 7B53N • 7D10 • 7D11 • 7D12 • NT-7000 • P7001 |
| T7700 | 154-0609-00 | CRT | CRT | 7704 |