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Ceramic strips: Difference between revisions
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[[File:Tek ceramic strips 6.jpg|thumb|350px|right|Tek ceramic strips]] | [[File:Tek ceramic strips 6.jpg|thumb|350px|right|Tek ceramic strips]] | ||
Some Tektronix instruments use '''ceramic strips with metallized grooves''' to hold components and wiring. | Some Tektronix instruments use '''ceramic strips with metallized grooves''' to hold components and wiring. | ||
This started with the [[315|Type 315]] in 1952. | This started with the [[315|Type 315]] in 1952 - Tektronix engineer [[Frank Hood]] recollects: | ||
<blockquote> | |||
Another employee, [[Ted Goodfellow]], a musician with ceramics as a hobby, suggested making a ceramic strip with silvered notches to act as insulator and support for the components. | |||
</blockquote> | |||
It continued into the early 7000-series instruments such as the [[7514]] mainframe and [[7A18]] vertical plug-in, | It continued into the early 7000-series instruments such as the [[7514]] mainframe and [[7A18]] vertical plug-in, | ||
both of which were [[introduced in 1971]]. A late example is the [[465B]] from 1980 that uses these strip in the HV section. | both of which were [[introduced in 1971]]. A late example is the [[465B]] from 1980 that uses these strip in the HV section. | ||
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Two distinct types of ceramic strips have been used in Tektronix instruments. | Two distinct types of ceramic strips have been used in Tektronix instruments. | ||
The earlier wedge type used a nut and bolt to mount it to the chassis. | The earlier wedge type used a nut and bolt to mount it to the chassis. | ||
The later rectangular style uses plastic snap-in clips. | The later rectangular style uses [[Patent US 3022973A|plastic snap-in clips]]. | ||
The production method is discussed in US Patent #3,121,020. | The production method is discussed in [[Patent US 3121020A|US Patent #3,121,020]]. | ||
[[File:Tek ceramic strip soldering.jpg|thumb|350px|right|Soldering instructions (click to enlarge)]] | [[File:Tek ceramic strip soldering.jpg|thumb|350px|right|Soldering instructions (click to enlarge)]] | ||
The ceramic strips | The ceramic strips turned out to be quite reliable. | ||
If they aren't abused, the only known failure mode is when they are used in HV supplies and are allowed to get very dirty. | If they aren't abused, the only known failure mode is when they are used in HV supplies and are allowed to get very dirty. | ||
The dirt can become conductive, resulting in unintended current flow over the surface of the ceramic strip, and/or arcing. | The dirt can become conductive, resulting in unintended current flow over the surface of the ceramic strip, and/or arcing. | ||
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* [https://vintagetek.org/ceramic-strips/ VintageTEK: Ceramic Strips and Funnels] | * [https://vintagetek.org/ceramic-strips/ VintageTEK: Ceramic Strips and Funnels] | ||
* [https://www.youtube.com/watch?v=RpB5JqGo1co Tektronix video: Ceramic Strip Soldering Techniques] | * [https://www.youtube.com/watch?v=RpB5JqGo1co Tektronix video: Ceramic Strip Soldering Techniques] | ||
* [[ | * [[Patent US 2836807A|US Patent 2,836,807, Ceramic Terminal Mount]] Filed 1953-04-20, Granted 1958-05-27 | ||
* [[Media:Ceramic_Strips-PartNo.pdf| Tek Part Number Reference (pdf)]] | * [[Media:Ceramic_Strips-PartNo.pdf| Tek Part Number Reference (pdf)]] | ||