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Ceramic strips: Difference between revisions
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Some Tektronix instruments use '''ceramic strips with metallized grooves''' to hold components and wiring. | |||
This started with the [[315|Type 315]] in 1952. | |||
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]]. | |||
The production method is discussed in US Patent #3,121,020. | The production method is discussed in US Patent #3,121,020. | ||
The ceramic strips have 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. | |||
The dirt can become conductive, resulting in unintended current flow | |||
over the surface of the ceramic strip, and/or arcing. | |||
This can be avoided by keeping the HV circuit clean, particularly the nodes after the rectifier(s). | |||
Tektronix warned that these strips should only be soldered with silver-bearing solder because | Tektronix warned that these strips should only be soldered with silver-bearing solder because | ||