One Transistor Regenerative Radio Receiver

[biowolf1977]

Hello!

Tell me, this regenerative radio received signal is SSB?

[caiserECEguy]

@biowolf1977 This radio is for the AM broadcast band so it's receiving AM signals. However, a regenerative receiver like this can be used on the ham bands for receiving SSB and CW.

[AmericanCryer]

The reason that your signal is louder when you put it on it's side is due to the orientation of the coil. . But very nice project indeed. Very nice.

[caiserECEguy]

@AmericanCryer Thanks for the comment. I realized later that in AM radios with loopstick antennas that the coil is always mounted horizontally. That's probably what I should have done here. I never have gone back to this project. This year I may try rebuilding it for the amateur and shortwave bands.

[AmericanCryer]

@caiserECEguy I just got my Amateur Tech class. I am trying to construct a CW transceiver as a club project. I personally want try and build my own Short wave transceiver. But that would be a large project.

[caiserECEguy]

@AmericanCryer Congrats on earning your license. I passed Tech+General several months ago and I'm still working on getting my station up and going. Building a complete transceiver would be pretty tough but it's not impossible. Good luck on your projects. 73's!

[AmericanCryer]

@caiserECEguy You too. KK4GOB.

[CONCEPTSCHOOL]

hey I like your efforts to make this project run.All the best for ur next.

[IHAVENOCHANNEL2012]

DON'T BE A DICK AND TRY TO SQUASH MY INTEREST BY ADDRESSING YOUR AUDIENCE AS GRADE SCHOOL KIDS AND SOME HIGH SCHOOL STUDENTS. YOU NEED TO WISE UP AND BE NICE IF YOU WANT TO KNOW OTHER NICE PEOPLE. I DOUBT ANY GRADE SCHOOL KID KNOWS JACK OF YOU. DANG! WHY MUST I TELL PEOPLE BASIC DECENCY THAT IS IMPORTANT TO ME, AND MAKES YOU LOOK BAD.

JUST A FRIENDLY REMINDER FROM A FRIENDLY PERSON. HAVE A GREAT DAY! OTHERWISE I ENJOYED YOU SHARING YOUR TERRIBLE NOISES WITH THE WORLD!!!

THAT IS COOL,

[wow1022]

it's good to have a very long wire for an antenna and an earth ground to something like a water pipe

[AristotleScience]

Nice little project. I would keep it together and start fresh with your next project - leave this one completely intact. Some of my greatest enjoyment comes from finding my old projects, turning them on and seeing them through somewhat wiser eyes. Thanks for sharing.

[magicmax27]

hi mate. the link to the design dosnt work. :0( im new to radio electronics and would like to build it to experiment with.

[caiserECEguy]

@magicmax27 It looks like the original pacbell link may be gone. If you look at the full description, you'll see my imgur link. That has the complete schematic for the version I built. If you're planning to experiment, I would strongly recommend trying out the other link on ARRL as well. That design picks up shortwave and ham radio bands and may be more interesting to play with.

[magicmax27]

@caiserECEguy Thanks alot, ill try that. I did build this radio last night and i was picking up something other than broadcasting. The coil i made had about half as many turns as yours and i also took out the 22pf capacitor C2 on the design you show on your computer in a search for a loose connection but when i did this it started working.

[gladthemax]

Hey man, congrats! Nice demo! I used to build these types of receivers when I was in grade 9! Awesome experiments! Try to hook up some external antena (and/or some ferrite core to your solenoid), you will definitely notice the difference. Great work!

[caiserECEguy]

@fjenxify That minimal design is interesting. I'd be curious to see it in action.

As I say in my video, my original intent was to have something simple a kid could build. The single 2N3904 is really the only active device required for this radio. The LM386 is a compromise so one can use a standard 8-ohm loudspeaker or earbuds with it. If you leave out the LM386, you can replace the collector resistor of the 3904 with high impedance headphones (which I've tried) and the radio still works.

[ZA295]

Great to see people still experiment with radio,as i got started with a crystal set in 1960 and a TransTronic kit a little later,which used a single OC44 HF transistor as a simple AM transmitter .

[2vermeio]

Parabéns muito bem feito seu trabalho.