First mass market junction transistors, the CK721 was the ‘premium’ version and those that failed the high end (!) specs got sold as the lower cost CK722.
I remember having to pick through a few CK722’s to find one that could oscillate at the high end of the broadcast band – 1.5 MHz!
Now, an average cell phone has a few Billion of them inside, and run at GHz speeds!
First mass market junction transistors, the CK721 was the ‘premium’ version and those that failed the high end (!) specs got sold as the lower cost CK722.
I remember having to pick through a few CK722’s to find one that could oscillate at the high end of the broadcast band – 1.5 MHz!
Now, an average cell phone has a few Billion of them inside, and run at GHz speeds!
Interesting that you were encouraged to “wire” your Raytheon distributor for more information.
Back when ESD damage was part of the advertising.
No these will never catch up, who needs them… maybe niche usage like in hearing aids that’s all folks! Tubes are forever 😂
Germanium Junction sounds like a fun place.