Well I created this frankenstein circuit while trying to make an LC oscillator that produces sine waves . I made a prototype that maybe works the same but with my tools I cant detect if there is any negative voltage ( basically I plugged a speaker to the output and it made a sound) . Anyone willing to do the experiment on his own and tell whether this thing is capable of producing radio waves or not please ?


link : http://tinyurl.com/ycw369qr

 

If you dont have a scope -

Sound card scopesstill useful around audio frequencies, plus
spectrum analyzer and signal generation.

https://www.zeitnitz.eu/scope_en



http://www.instructables.com/id/Use-Your-Laptop-as-Oscilloscope/

http://www.zelscope.com/

http://www.ledametrix.com/oscope/

http://www.virtins.com/downloads.shtml


But first build a simple circuit to protect sound card inputs so you do not
ruin from transients, overvoltage. Google "protect sound card input".


For example http://makezine.com/projects/sound-card-oscilloscope/


Sound card impedance bridge -

http://www.marucchi.it/ZRLC_web/ZRLC/Steber_An_LMS_Impedance_Bridge.pdf

http://www.sillanumsoft.org/ZRLC.htm


Regards, Dana.

 

Well thanks a lot , I will check it out

but you didn't tell me . Can it produce radio waves ?

 

What would you need to change to find out whether it would produce RF?

 

I have no idea what so ever ... I am not an electrical engineer , just a highschool student who like to get his hands dirty with electronics...So if you can point me to the right direction that would be helpful , my experience with electronics is in early arduino board understanding stage but I wanted to experiment with LC circuits because I find them interesting for some reason:/