Reflex radio receiver - AM - 550 - 1600 KHZ - Homemade.

Reflex receiver.
The reflex radio receiver is the one where some stages are used with a double role. In the present case, the assembly made up of transistors T1 and T2 works both as a radio frequency amplifier and as an audio frequency amplifier.
The radio frequency signal selected with the aid of the tuned circuit L1 - C1 is amplified by the two transistors, then after the signal has been detected by diode D1, the audio frequency component is passed through the same stage and amplified.
By using this method, it is possible to save on components and obtain an assembly with superior qualities, under a small volume.

[@shahryarpasyar1481]

I made this project, it is wonderful, good quality Audio, it doesn't need external antenna, reflex radio comes from 1914 and is attractive until now. Thanks for this good design, i plan to add LM386 audio amp and use it as a diy desktop radio in my room.

[@dz-abouttechnique1849]

Thanks for appreciation. I am also going to make a radio frequency amplifier for him. It will be with inductive coupling (transformer). The radio will have superior qualities.

[@drdengineering819]

Each transistor is doing double duty due to filtering and signal feedback which also establishes bias of both transistors. This was done in the early days of tubes.

[@eugenepohjola258]

Howdy. Absolutely wonderfully simple schematic ... Regards.

[@dz-abouttechnique1849]

Thank you!

[@hamzahtechnical5470]

I made this reflex receiver and it worked very well , follow the schematic which is at 0:11

[@dz-abouttechnique1849]

I'm glad!

[@thierry_r]

Very fine, simple to make it !

[@dz-abouttechnique1849]

Thank you!

[@Lechoslowianin]

interesting simple scheme, worth a try

[@dz-abouttechnique1849]

And it works.

[@captmohelsaadany6751]

well done 👍 it works very well

[@dz-abouttechnique1849]

Thank you!

[@KennethScharf]

Schematic seems wrong to me. C3 should connect to Q2 collector or it will short RF output to ground. R2 should be lower value.

[@dz-abouttechnique1849]

You are vigilant. 👍 The correct scheme is here: minute 0:11

[@egonvankammen1485]

wow, i have build it and it works perfect!! nice little reflex radio👌👍

[@dz-abouttechnique1849]

Congratulations!

[@christianlofaro6285]

OK on what wave lenght does it works?

[@dz-abouttechnique1849]

@@christianlofaro6285 550 - 1600 KHZ

[@christianlofaro6285]

@@dz-abouttechnique1849 ok! thanks a lot

[@dz-abouttechnique1849]

@@christianlofaro6285 You're welcome! 🙂

[@XPFTP]

talking about it probley would of gotton more views. music videos are for MTV ....

[@dz-abouttechnique1849]

I will also add explanations. Thank you!

[@TechniCraftYT]

Does it also work with shortwave if you decrease the inductance with an air core?

[@dz-abouttechnique1849]

Yes.

[@captmohelsaadany6751]

sir i want to use 3v battery instead of 9v please advise

[@dz-abouttechnique1849]

I will analyze.

[@alnoorratansi9364]

How many turns of wire to make the ferrite coil ?

[@dz-abouttechnique1849]

Minute: 0:12

[@vedantsahu00]

Bro I wanted to make a 100MHz frequency radio receiver for my 100MHz Radio Transmitter could you please help me because I don't have enough knowledge about that 😭

[@dz-abouttechnique1849]

Hello! Try building this one: kzbin.info/www/bejne/qqW0dYOIordnZq8

[@msnmsn4440]

يا خويا انت من الجزائر ؟!

[@LutzSchafer]

It's not commonly called reflex receiver. It's not even regenerative. Just a simple forward 1V1. Nothing spectacular...

[@dz-abouttechnique1849]

It's a simple reflex radio. A construction for amateurs.

[@hamzahtechnical5470]

It is audio regenerative, because audio is fedback to the input , when audio is fedback to input it is called reflex receiver.

[@LutzSchafer]

@hamzahtechnical5470 okay I realize that there was a linguistic misunderstanding. Thanks for the clarification 😀

[@demophys4883]

Can you do better?