1-Ttube reflex receiver (T1555E)

This one-tube circuit is equivalent to the previous one. We find it in a 1924 book by Gernsback, Power is made by batteries.

1 A Voltage Follower LM195 (CB14268E)
This circuit makes use of a special LM195 power transistor not very easy to obtain. The circuit is from...
12.5 W Amplifier (CB13212E)
The components of this circuit from the 70's are no longer common on the market, but it is...
Magic Box (CB13989E)
This circuit was found in an Italian magazine Radiorama from 1960, but it can be assembled with...