2 Transistor MW Receiver

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This is a 2 transistor regenerative-reflex MW receiver. It covers the AM broadcast band from 530 KHz to 1650 KHz. The first transistor is used as a regenerative detector and AF (audio frequency) amplifier at the same time, hence the name "reflex". The second transistor is used as an AF amplifier. Performance is equivalent to a 3 transistor receiver, giving very good volume in a crystal earphone. The receiver runs on a 9 volt battery.

Controls from right to left: regeneration, volume and tuning. On-off switch is above earphone jack on the right. Aluminum front panel greatly minimizes hand-effects and stabilizes regeneration.


Components were soldered directly to the copper circuit (surface mounted), eliminating the need to drill holes in the PCB (printed circuit board). This allowed me to experiment with components values for optimum circuit performance.


A short history | My radio background | Homemade radios | Tube radios
Transistor radios | World band radios | Kit radios | Reel tape recorders
My other interests | Pictures of Lebanon | Radio links
Home | Showcase | About this site

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