Retro-style AM receiver with reflex detector

The first two transistors can be soviet Ge ГТ321 or П416. The next two can be soviet Ge МП25. The diodes are soviet Д9. The 5 Ohm resistors are to imitate ohmic loss in the coils (also 10 Ohm in the battery). The RF transformer has two coils. The primary coil can be made into a variometer to tune to a station. The capacitor 426 pF is a variable capacitor that also needs tuning. It can be excluded, but then the sensitivity and the selectivity of the receiver will decrease. The 50 Ohm load in the LF amp can be an earphone or a speaker. Low impedance speaker should be equipped with a transformer for a louder reception.

published 4 years ago