2 m range converter (CB20263E)

This converter for the 150 MHz band was found in an American documentation. Transistors are uncommon today and equivalents can be used.

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FSK Generator (CB7431E)
This circuit was obtained in a magazine for radio amateurs 73 of the 90s. The circuit is based on...
15 V Regulator MA1539 (CB4017E)
This circuit is from a documentation on the MC1539 from Motorola and may, however, be implemented...
Unijunction Pulse Generator (CB24252E)