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Back-lit switches: Difference between revisions
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The contacts can break off from the support, giving no or intermittent conduction. It is possible to solder the contact to the support if care is taken to apply solder only to the center, or to transplant an unused contact (see example photo). | The contacts can break off from the support, giving no or intermittent conduction. It is possible to solder the contact to the support if care is taken to apply solder only to the center, or to transplant an unused contact (see example photo). | ||
==History== | |||
From [https://vintagetek.org/wp-content/uploads/2019/06/On-The-History-And-Environment-Of-Tektronix.pdf The History and Environment of Tektronix]: | |||
<blockquote> | |||
So, one day, Howard said, "the [7000-series] plug-ins will be 5¼ inches in height." | |||
[[Oliver Dalton]] recalls the decision to reduce the plug-in height as a traumatic one:<br /> | |||
"The decision set us back at least one year for the height decision required three major electro-mechanical component efforts in addition to the [[7000 series readout system|IC read-out effort]]: 1) new lit push-buttons ... we needed 25 on a panel; 2) [[cam switch]]es - these were Howard's ideas ... we needed them to be small and reasonably cheap; 3) [[miniature relays|relays]] ... we needed them to be small and reliable. We then largely had to make do with other available parts, like potentiometers. | |||
</blockquote> | |||
==Photos== | |||
<gallery> | <gallery> | ||
backlit-sw-1.jpg | backlit-sw-1.jpg | ||