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Space mystery: Amateur radio sleuth detects secret signals from SpaceX military satellites
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The first transistors were point contact devices, not far from the cats-whiskers of early radio receivers. They were fragile and...
If you’ve worked with germanium transistors, you’ll know that many of them have a disappointingly low maximum frequency of operation....
The germanium point contact diode, and almost every semiconductor device using germanium, is now obsolete. There was a time when...
