The operational amplifier for this tone control found in a 1977 Signetics manual may be the 741. The power supply must be symmetrical and the signal cables short. The bass gain is 20 dB.
) The integrated circuit used in this control is uncommon today and the maximum current obtained allows...
This flasher or neon signal powered by batteries was found in old documentation. The transformer must...
This circuit amplifies signals from 10 MHz to 500 MHz with a gain of 10 dB. We found it in...