7J20: Difference between revisions
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The external enclosure is labeled "J20". | The external enclosure is labeled "J20". | ||
It has controls for the optical components (grating, filters etc.) on one side and an input aperture on the other. | It has controls for the optical components (grating, filters etc.) on one side and an input aperture on the other. | ||
The 7J20 is very rare. According to [[Dennis Tillman]], ''Best estimate is ~40 were actually built.'' | |||
{{BeginSpecs}} | {{BeginSpecs}} | ||
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==Price== | ==Price== | ||
$12,000 in 1975 (~$ | $12,000 in 1975 (~$68,000 in 2023 dollars) | ||
==Links== | ==Links== | ||
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Inside the J20, there are 40 trimmer potentiometers that allow the lookup function to be tweaked so that the horizontal scale of the system is accurate. | Inside the J20, there are 40 trimmer potentiometers that allow the lookup function to be tweaked so that the horizontal scale of the system is accurate. | ||
[[File:Tek_j20_interim_normalizer2.png | thumb | 400px | center | Normalizer (click to enlarge) ]] | [[File:Tek_j20_interim_normalizer2.png | thumb | 400px | center | Normalizer (click to enlarge) ]] | ||
==Pictures== | ==Pictures== | ||