4-tube reflex (T1662E)

This circuit that uses a loop antenna was found in a 1924 publication. The circuit has several supply voltages and sets of audio and RF coils.

| Clique na imagem para ampliar |

Target Shooting (CB16710E)
The digital target shot shown in the figures (weapon and target) was found in a 1992 documentation but can...
Amplified Speaker (CB25159E)
This amplified speaker is from a Radio Electronics from September 1988. The power integrated...
Headphone amplifier (CB20653E)
The transistors used in this 1985 Radio Electronics circuit are for general use. The gain pot can...