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Originally Posted by CheeseFoodProduct
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Ah... I see where you came up with the term 'passive amp'. The
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Satellite Dish In-line Amplifier Signal LNB 20 dB TV Antenna Digital Booster Coax Cable DSS DBS Dish Outdoor Video Channels, 950 - 2050 MHz DC Passive, 13 - 18 VDC, Part # LAA
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at summitsource.com is designed for use on long runs between a satellite dish and receiver. Power is normally sent from the satellite receiver through the coax to the dish to power the LNB/LNA at the dish. The advertised amplifier is designed to use some of that normal power source and
pass the voltage and current onto the LNB/LNA out at the dish... hence the the term 'DC passive'. The amplifier itself is an active device. On top of all that, your friends' TV tuner will not send power up the line to power that amplifier or anything else.
Notice the frequency range, 950 MHz to 2050 MHz... that range does not include any of the over-the-air frequencies. The product is for use in satellite receiving systems only. So, even if you figured out a way to send power up the coax, it would make your friends' problem worse, possibly blocking all OTA frequencies and you would be sending power into equipment you don't own, risking damage to it or your power source.
The other amplifier is a cheap, low gain, moderate to high noise device despite what the ad copy says. It would be a waste of money IMO.
Sorry I don't have more helpful input.
I think your plan to use an indoor antenna is the best course. Building construction may or may not interfere with OTA reception. The only way to know for sure is to try.