electronicdx

Hello, I have something to ask, how is a longwave radio different from a AM radio receiver. Is it the ferrite coil antenna and also the oscillater/mixer coil? I want to learn more about on how to build a radio receiver that covers 10 kHz to 150 and also 150 kHz to 520 kHz. Its something for me to learn on how they work and also I want to work on something different. Also why is there not any long wave radio receiver kits out there, I bet many hobbyists want to build a longwave band radio kit of their own using a soldering and a bunch a tech tools. I certianly do see AM and SW radio receiver kits, but no longwave related kits except the Ramsey VLF converter kit. I hope in the future, especially for NDB DXers and hobbyists that we get LW radio kits, and also look into LW and MW kits like 2 band radios or 3 band LW-MW-SW kits. Please help me out and others who are interested in this, and I hope to get further in low frequency electronics for ham radio and radio science purposes. Thanks. Adam Ebel electronicdx

Yes it is its really 120 Hz buzz mostly like a hash buzz. Thanks for the reply. Adam E.

Thanks for the great replies. I have had this noise problem from a transformer for a very long time, but the guys at the power company would not detect it correctly with their EMF detection equipment. On the frequencies for long wave radio there is dimmer switch like buzz 120 Hz harmonic, its strong on certain longwave radio frequencies and weak on others its even interfering with not just the long wave frequencies 150 to 519 kHz bands, but on the 60 kHz region as well. Strongest detected was 162, 216 and all over others. Now this morning there is stronger buzz its getting worse than it was a 1 month ago. Shortwave is good and FM is fine. everything on AM and LW is nothing but buzz. I wanted to see if I can get rid of the interference from the receiver side and since I am in a townhome location, I just deal with this problem till I move out. The power company would not fix the electrical interference source because its underground. I hope someone can help me out thanks so I can get back into longwave radio station listening. Many Thanks, Adam E. Virginia Beach VA.

Hello, I am trying to suppress electrical interference from a power line problem, and I am thinking about building a notch filter for 60 Hz and 120 Hz. Does this circuit connect to the antenna source or the audio amplifier source? How effective would this notch filter do for getting rid of electrical interference? Let me know thanks. this is a nice good looking group! Adam Ebel Glad to be here!