This OF-1 LO oscillator was found in a 1980s American documentation. The transistor can be any general-purpose and C1 / C2 are determined by the frequency.
The integrated circuit of this 80's project is not common today. This is the HA2530 which must be...
This circuit is from a 1992 PE Hobbyst Handbook. The circuit fires an old electronic flash using an...
This complementary transistor stage was found in a 1968 publication. The transistors are germanium types and...