Re: First transistors at Tektronix?


Harvey White
 

IIRC, it was far easier to make germanium PNP transistors at the time rather than NPN.  (see CK721 and CK722).

Once the silicon transistor made its debut, NPNs became more prevalent.  May have been a process thing, but mixing tubes and transistors was easier with the same polarity power supply needed.

Harvey

On 10/25/2020 5:45 PM, Christian via groups.io wrote:
Some good suggestions to dig into, thanks! According to the wiki, the Type R, released in 1958, was the first plug-in with transistors. It had 10 - nine PNP and one NPN, which is interesting. In the service manual for it you can see Tek upgrading parts presumably as they became available, it's kind of amusing to read between the lines there. Now I want to find the Common Design Parts from 1960 or so and see how things went.




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