Open post Lieven - DF1CN @DF1CN@social.darc.de · 2w ago Replying to @hensys@social.anoxinon.de Unboxing #Retevis C62. Received today. #hamradio #amateurradio #M17 @hensys@social.anoxinon.de meine sollen heute auch ankommen. Ich hoffe, die Firmware wird bald fertig.
Open post Lieven - DF1CN @DF1CN@social.darc.de · 2mo ago Replying to @trashpanda@m.alittlenook.net I have a #hamradio question. Is there a minimum power level required to make a transmission? Not legally, but physically, or well maybe not even physically, but practically speaking. Like could I broadcast an HF signal in my home that only reaches a few feet? If so is that minimum frequency dependent? I think the answer is no, because portable FM broadcaster for car radios exist, WiFi, exists, and interference from IF used to be a thing, but I am not sure. @trashpanda@m.alittlenook.net the absolute minimum is -174dBm/Hz at the receiver. Thats the signal generated by components at room temperature. In practice the limit is higher due to noise and interferene.