Dennis and Dave Evidence so far: 1. Experiments in loading 50 foot (15m) evergreen fir tree for operation on 3.7MHz. 1.5metre diameter tuned loop and novel (G3LHZ) tuned coiled hairpin tried as tree
Mike, I am a bit sceptic about "bio-electric noise". If a tree turns out to be a noise source I might be more likely that it acts as a (very poor) antenna that picks up signals and re-radiates them.
Hi Mike, this is a really amazing statement! I'm going to investigate this somewhere in the nature, kilometres away from cities and villages! Yes, the tree obviousely will act as a "black body radia
Dennis (DL6NVC) Please could you try your loop away from the tree. Preferably more than 2 metres. I have found severe bio-electric(?) noise from trees from 3.5 to 500MHz.using loops, whips and UHF Ya
Hi Dave! Did not know that, thanks! Yes, one single noise source I was able to track down was the energy saving bulb of my neighbours bedroom. Another source is my own Nokia cellphone charger But the
However bad a system Powerline is, it does NOT generate noise at 500kHz. It occupies 2-28MHz more or less with most of the devices having very deep notches in the amateur bands. Wideband QRM like you
Hello Dennis, Though vertical antennas (and active whips) have a bad name in regard to local noise, this is not necessarily true for reception at LF. Local noise in the electric field is attenuated b
