This traditional TTL configuration was obtained in a 1977 documentation. The supply must be made with 5 V and the capacitors can be changed for operation at other frequencies.
The basis of this circuit is the integrated TA7205, which is not very common today. We found the...
Found in a 90s magazine for radio amateurs, this circuit can generate frequencies up to 45 MHz...
This shield circuit was found in an American publication from the 80's. The triac is of low...