Speaker output reflex receiver (T1653E)

Found in a 1924 publication, this 2-valve receiver has a speaker output. Power comes from several batteries. Information about the coils is given.

| Clique na imagem para ampliar |

100 kHz XTAL Oscillator (CB14364E)
The circuit shown was found in a 1994 Linear Applications Handbook by National Semiconductor. The...
Transistor RIAA Preamplifier (CB1372E)
We found this circuit in documentation from the 1970s; The circuit uses Japanese transistors of...
Crystal Pierce Oscillator (CB14140E)
This traditional crystal oscillator configuration with FET was found in the 1994 Linear...