Ham Radio Normal Noise Floor

It seems like the fcc s recent interest in doing an in depth study of the growing rf spectrum noise floor has taken a new twist.

Ham radio normal noise floor.

Reprinted with permission of the author. Your best bet would be to move the radio away from the noise. This change should help in reducing losses though. Calderon du1anv makiling amateur radio society member.

According to reference data for radio engineers sams 1975 the wintertime level of natural noise in my area at 10 mhz should be about 32 db above the thermal reference level. Replaced 30 feet of rg 8x feed line to the shack with 30 ft of rg 213 coax. The fcc s apparent lack of real action in gathering the data needed to make serious inroads into rf noise pollution has drawn the attention of the arrl which voiced their concerns in a recent arrl letter as well as in their formal response to the fcc. The noise floor is high and there s nothing you can do about it as most of it is coming from things well beyond your control.

I adjusted the timewave anc 4 to further try and negate any remaining noise. I now live at a new qth my kids have left home and all of the tv s and other electronics in the house have been replaced over the last 5 years apart from the microwave but the problem remains s5 s7 static noise on 40 17m 12 10 are clear with only one common factor my ocf. Philippine amateur radio association para. This would produce a noise floor of 104 dbm in this bandwidth with a perfectly efficient antenna.

Through the years i have been hearing problems from fellow hams over the air and even in personal eyeball communications about how they can organize and implement a good and effective radio frequency interference rfi. The noise floor can be defined as the measure of the signal created from the sum of all the noise sources and unwanted signals within a system. I have been having problems with a high noise floor for over 10 years in fact it was why i gave up radio 5 years ago. Adding the choke to the antenna input made a big improvement in lowering the noise floor.