4 ms·
In high school we would put vacuum tubes in the tube tester and rapidly adjust up the heater voltage. Turns out those babies would launch like rockets if you cr
by bregma 6y ago
In high school we would put vacuum tubes in the tube tester and rapidly adjust up the heater voltage. Turns out those babies would launch like rockets if you cranked it way past nominal. Our electronics teacher was not pleased.
- quercusa 6y agoOnce upon a time it was common to see tube testers in drug stores, as they sold replacements for common TV and radio tubes.