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Old 26-Jul-2019, 10:40 PM   #23
Retired A/V Tech
Join Date: Aug 2012
Location: S.E. VA
Posts: 2,725
Originally Posted by GroundUrMast View Post
Figure 3 and the related cometary are of help:

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.

If you can not measure it, you can not improve it.
Lord Kelvin, 1883

Last edited by rabbit73; 27-Jul-2019 at 12:59 AM.
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