Found in Motorola's 1968 power circuit manual, this circuit has a high input voltage and no information was given about the transformers as the original types are commercial at the time.
We found this circuit in an old European documentation. Transistor TR1 can be BC548 and TR2 can be...
Found in a 1967 EEE, this circuit oscillates at 20 MHz according to the values of the given...
We found this receiver for medium and short waves in a publication from the 1980s. The medium wave...