Re. the various sources of RFI:http://www.tvtechnology.com/conferen...visited/183659

Re. the various sources of RFI, FCC proposed solution (transmitter power level increases by 8 to 12 dB over the VHF spectrum {CH-13 through CH-2}) and the ongoing political pressure to take more spectrum from OTA TV:http://www.tvnewscheck.com/article/4...-high-priority

Figure 3 and the related cometary are of help: http://www.broadcastpapers.com/white...E6988F127D1403

The implication of this work is that at the bottom of the Low-VHF band, noise levels can be as much as 30 dB higher than thermal noise level.

This is an old thread, but the topic is still current because some channels are moving down to VHF-Low as a result of Repack by the FCC.

My measurements with indoor antennas show that the noise on channel 3 is 39 dB above the thermal noise floor (for a 6 MHz channel) and a channel 3 signal must be 33 dB stronger than a UHF channel.

https://i.imgur.com/aAU1EBY.png

A quick but worthwhile read: http://www.hdtvexpert.com/tag/low-ba...-tv-reception/

Good article; thanks for the link.

His noise level (-50 dBm) during a test was even higher than mine.

Pete Putman mentions KSNV on channel 2. In June of 2012 I tried to help a poster in Las Vegas who was having trouble receiving KSNV. I told him it was on VHF channel 2 (virtual 3.1), which it was at the time. He didn't believe me and said it couldn't be on 2.
https://www.avsforum.com/forum/25-hd...las-vegas.html

He is a ham and retired military commo guy who got so upset that I had to delete my earlier posts to him. After I had something to eat, I tried to explain it to him again.