OC170: Difference between revisions
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{{Discrete component | |||
|Model=OC170 | |||
|Part_nos= | |||
|Description=alloy-diffused Germanium PNP transistor | |||
|an=an | |||
|Used_in=321;661; | |||
}}. | |||
It has a breakdown voltage of about 20 V and a maximum collector current of 10 mA. | It has a breakdown voltage of about 20 V and a maximum collector current of 10 mA. | ||
Beta is typically 150, f<sub>t</sub> about 60 MHz. | Beta is typically 150, f<sub>t</sub> about 60 MHz. | ||
| Line 6: | Line 11: | ||
The OC170 was developed by Philips and introduced in the late 1950s. | The OC170 was developed by Philips and introduced in the late 1950s. | ||
Due to [[Germanium transistors|tin whiskers growing inside the case]], OC170s are a common source of problems on equipment of the period. | |||
For more information, see the [[Germanium transistors]] page. | |||
==Links== | ==Links== | ||
* [https://www.vintage-radio.net/forum/showthread.php?t=5058 Thread on tin whiskers in OC170/OC171 @ vintage-radio.net] / [https://www.vintage-radio.net/forum/showthread.php?t=35171 Detail pictures] | * [https://www.vintage-radio.net/forum/showthread.php?t=5058 Thread on tin whiskers in OC170/OC171 @ vintage-radio.net] / [https://www.vintage-radio.net/forum/showthread.php?t=35171 Detail pictures] | ||
{{Part usage}} | |||
==Data== | ==Data== | ||
* [ | * [[Media:Mullard oc170.pdf|Mullard OC170 Datasheet]] | ||
[[Category:Transistors]] | [[Category:Transistors]] | ||
Latest revision as of 15:00, 8 January 2024
The OC170 is an alloy-diffused Germanium PNP transistor. It has a breakdown voltage of about 20 V and a maximum collector current of 10 mA. Beta is typically 150, ft about 60 MHz.
The OC170 was developed by Philips and introduced in the late 1950s.
Due to tin whiskers growing inside the case, OC170s are a common source of problems on equipment of the period. For more information, see the Germanium transistors page.
Links
Some instruments using part OC170
| Instrument | Manufacturer | Class | Model | Description | Introduced |
|---|---|---|---|---|---|
| 321 | Tektronix | Oscilloscope | 321 | Portable single channel scope | 1960 |
| 661 | Tektronix | Oscilloscope | 661 | Sampling scope | 1961 |