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7844: Difference between revisions
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|summary=400 MHz dual-beam non-storage mainframe | |summary=400 MHz dual-beam non-storage mainframe | ||
|image=Tek7844-front.jpg | |image=Tek7844-front.jpg | ||
|caption= | |caption=Tektronix 7844 Opt.78 (P11 phosphor) | ||
|introduced=1974 | |introduced=1974 | ||
|discontinued=1988 | |discontinued=1988 | ||
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Versions include the 7844 bench-top lab scope and R7844 rack-mount model. | Versions include the 7844 bench-top lab scope and R7844 rack-mount model. | ||
Circuit design for the 7844 was done by [[Chuck Scott]], [[Dick Anderson]], [[Keith Taylor]], and [[Bob White]]. | Circuit design for the 7844 was done by [[Chuck Scott]], [[Dick Anderson]], [[Keith Taylor]], and [[Bob White]]. Project manager for the 7844 was [[Murlan Kaufman]]. | ||
Project manager for the 7844 was [[Murlan Kaufman]]. | |||
A typical configuration might have included [[7A19]] or [[7A24]] amplifiers, [[7B80]]/[[7B85]] or [[7B92A]] timebases. | A typical configuration might have included [[7A19]] or [[7A24]] amplifiers, [[7B80]]/[[7B85]] or [[7B92A]] timebases. | ||
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The power supply is a resonant switch-mode inverter with linear post-regulation, similar to the one in the [[7904]]. It uses the [[155-0067-02]] controller. Despite having an SMPS, the 7844 is fairly heavy behause of the duplicate internal components, especially the second vertical delay line. The delay lines need extra space and are located vertically to the right of the CRT instead of below the CRT as in other 7xx4s. | The power supply is a resonant switch-mode inverter with linear post-regulation, similar to the one in the [[7904]]. It uses the [[155-0067-02]] controller. Despite having an SMPS, the 7844 is fairly heavy behause of the duplicate internal components, especially the second vertical delay line. The delay lines need extra space and are located vertically to the right of the CRT instead of below the CRT as in other 7xx4s. | ||
Unlike some other 7000 series mainframes with | Unlike some other 7000 series mainframes with switchmode PSUs, the 7844 does have a fan. | ||
==Links== | ==Links== | ||
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Tek 7844 with 7d15.JPG | Tek 7844 with 7d15.JPG | ||
7844-3.jpg | Simultaneous time and frequency domain display using a [[7A26]] amplifier, [[7B92A]] time base, and [[7L5]] Spectrum Analyzer | 7844-3.jpg | Simultaneous time and frequency domain display using a [[7A26]] amplifier, [[7B92A]] time base, and [[7L5]] Spectrum Analyzer | ||
Tektronix 7844.JPG | Tektronix 7844 front view (with [[7A26]], [[7A19]] | Tektronix 7844.JPG | Tektronix 7844 front view (with [[7A26]], [[7A19]], [[7B80]] and [[7B85]], CRT EMI screen) | ||
R7844-2.jpg | Tektronix R7844 | R7844-2.jpg | Tektronix R7844 | ||
R7844-rear.jpg | Tektronix R7844, rear view | R7844-rear.jpg | Tektronix R7844, rear view | ||