Originally Posted by pclement
Thanks. I have ordered a CM 7777 Pre-amplifier to amplify the signal at the source. I will let you know if that helps. I only have a distribution amplifier currently. Please note that the Tube is now on 43-2. That is an all music OTA channel. If you get 43-1 you should be able to get 43-2.
I recently installed a CM 7777 with my setup. Distance to towers varies (12 to 60 miles from three directions), but averages around 40 miles (the 12 miles is a low power station).
Without the CM 7777 I was getting signal strengths of 50 to 93 (In the basement, I was using a CM quad output distribution amplifier of 23 db to boost the signal at 8db per output).
With the CM 7777 installed my signal strength dropped significantly 0 to 70 with many signals lost. I removed the distribution amplifier and the signals with just the CM 7777 improved to 70 to 100. I have the power unit for the CM 7777 in the basement and have the output signal going to a dual output splitter (not a diplexer). Each output goes to a diplexer where the antennae signal is combined with my DirecTV signal (Please note that I have a Phase III DirecTV system. I understand that the AT9 (MPEG 4)system does not allow the signals to be combined.). I use a single RG6 to convey the signal to each of my H10 receivers where I again use diplexers to split the antennae signals from the DirecTV signals. This seems to work very well.There is such a thing as too much gain with the digital signals.
When I moved the power unit for the CM 7777 closer to the antennae, I was able to use the CM quad distributor with no loss in signal (but no gain either). This does allow for four outputs with no signal loss.
I am able to get Baltimore, MD, Washington, DC and Harrisburg, PA signals for ABC (except in PA), CBS, NBC, FOX, PBS, UPN (MyTV), WBN and a couple of independent channels. All in all about twenty stations (about 45 channels counting subchannels).
I do sometimes get stations farther away, but not on a regular bassis.
I am very pleased with the performance of the CM 7777 and would recommend it for use in fringe areas. I do not really need the distribution amplifier, but it does allow me to output to more TVs.
I am using a Radio Shack VU-190 outdoor antennae and a CM rotor. I am located in southern York County.