The setting of this power supply is only 0.1%. We found it in a 1969 US documentation. Transistors may be current equivalents. Note the use of symmetrical power supply.
This low-current control circuit has a lamp as a load, but can have other types of devices, such...
The varactor or varicap diode tunes the signal for listening to SSB signals on a common receiver. The...
This power supply is not protected from shorts in the output. Output voltage is given by the...