This is a commercial circuit from the year 1958. Transistors are germanium types and transformers and coils are hard to fild today. The circuit is destinated to the reception of medium wave stations.
This circuit interferes with the operation of infrared remote controls. Your radiation should be...
We found this circuit in a 1975 radio amateur documentation. The circuit uses TTL technology and...
With a 1 500 uFcapacitor this timer can reach times up to one hour. The capacitor must be of good...