This circuit was found in an American magazine 73 for radio amateurs of the 80s. It is an automatic transmission circuit for telegraphy. The circuit is TTL.
This is the basic configuration for a 5 V output with a maximum current of 5 A with the National...
The first integrated circuit of this receiver, a PLL from the 90s, is no longer easily found on...
This circuit incorporates the passive control of the previous circuit and was also found in the...