I recently got a CM4228 installed without a pre-amp to feed a Samsung UNxxES7100 LED TV. I am from Ottawa, ON Canada, with this great antenna I got 10 solid English channels and 4 French.
In the scanning process, I found 3 US weak, snowy channels:
18.1 23.1 WNPI-DT PBS-SD Norwood, NY
18.2 23.2 WNPI-DT THINK Norwood, NY
18.3 23.3 WNPI-DT PBS-HD Norwood, NY
Then, I picked up a Rat/Shack or now The Source (in Canada) this TV/VCR/FM Signal amplifier, which is a 9 dB in-line signal booster. Plugged this in, connected the In and Out, then voila, all 3 US NY channel appeared nice and clean.
Note that at first when the TV was on, it was on another good channel, the picture appearred blurred at first, apparently good channel signal was saturated by the 9 dB gain introduced. Then, when I flipped to the NY channels, and back to the known good channels, it looks normal (and still good) now. My guess is there is a AGC circuit inside the Samsung digital tuner, that compensated for the 9 dB unecessary gain.
But then, I need to go to the gym for Wed night. When I got back, those 3 additional NY channels are gone. I checked and changed the coax cable, re-scanned the TV, still no joy. It appeared the signal amplifier is DEAD
I don't think this brand is reliable, will return it, and look for another choice. At Cdn Tire there is a 25 dB gain in-line amp:
My concern is, not knowing how much the Samsung TV tuner can take, would I damage the tuner by pumping a 25 dB gain signal to its input?
I intend to cut my SAT TV services, only use OTA HDTV, would not want to risk $30 for the TV digital tuning circuit, just to get 3 more channels that I may not watch that often?