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Author Topic: In-Line Amplifier  (Read 626 times)
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Tinker
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« on: Apr 11 2011 12:46:37 »

In-Line Amplifier specs. What does it all mean?
There are different db numbers. Different range of mhz numbers.

Powered or non powered In-Line Amplifier. Which is better or does it matter?
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bjpython
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« Reply #1 on: Aug 09 2011 07:52:34 »

I like using the preamp by RCA, found at Menards stores..  they work well for the price of 29.00
Ive used some higher priced ones that claims to be very good, but I find the RCA preamp simple to use, easy to buy, also seems the only ones to find in a physical store you can go to without ordering and waiting for the package.  just put the preamp near the antenna on the line  and the power box is connected to the tv,, coax cable in between.  even if the  cable is 100 ft.

NOTE:  Not refering to IN-LINE amps,  a PRE-AMP works much better,  they are also powered supplied via a 12v dc plug.
« Last Edit: Aug 09 2011 08:08:48 by bjpython » Logged

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« Reply #2 on: Dec 20 2011 12:43:50 »

There are 3 TV band ranges even with the advent of HDTV.  They are 54-88 mhz, called VHF-LO (channels 2-6); 175-216 mhz, called VHF-HI (channels 7-13); and 470-806 mhz, called UHF (channels 14-69).   Unfortunately, tv channels as they are displayed over the air, are not necessarily the actual channel they are broadcasting on.  The db ratings are the amount of amplification that an amplifier can provide for the particular band of frequencies.  Db figures are calculated logarithmically, for example 3 db is 9.5 times voltage and 20 db is ten times voltage.  Most amplifiers run 20 db (10 times voltage), and a signal is measured in microvolts,(1/1000th of a volt).  So if a TV station's power produced 100 microvolts at your antenna, the TV set would see 1000 microvolts, which the signal provided by most cable companies, as an excellent signal. BTW, antennas don't know the difference between the old tv signal and the HDTV signal and most amplifiers won't care either.  El_Viejo   
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