Found in a 1947 publication, this 7-tube amplifier uses four tubes in the output stage. The circuit uses a power source with a transformer.
This 100-second timer was found in a 2000 Poptronics. The magazine no longer exists, but the...
The 3-digit AD converter on this circuit is not very common today. It uses 2 integrated circuits to...
We found this circuit in the National Semiconductor FET manual. The components are calculated...