Piggie

Ok, you have two problems. One is you have 2 amps inline and unless one very very very carefully, did I say very carefully engineered? ALWAYS causes problems. For 99.999% of home users two amps are a guarantee to loose channels.

And as Tim points out, the RCA antenna itself should have an indoor portion that powers the RCA antenna remotely.

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Now my opinion you need to totally redo your antenna system.

Here is your situation site survey now knowing your antenna and system to a degree.

1) You have a Low Band VHF WTVF CBS on Channel 5
2) You have a High Band VHF WSMV NBC on Channel 10
3) The rest of your possible channels are on UHF.

That means you need an antenna that does all three TV bands, Low and High VHF and UHF.

Your signals at 20 ft are neither weak nor strong. They are in the very doable range of moderate signals. You are definitely are a fringe user.

This means right away you need a much larger antenna than you have. The one you have is meant for urban and you are two levels past that range. So it's very inadequate to receive reliable DTV.

For excellent results you need at least a Winegard HD 7082P and if you can support a slightly longer boom and another $10 buy a Winegard HD 7084P

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You would not need a rotor as all your channels within a 26 degree spread. You may find you need to adjust within that arc for the best overall reception, but I seriously doubt even with a high gain directional antenna a rotor would help.

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You need an amp. Your signal levels are low enough that an amp would not over load even with a 10 db high gain antenna. More so as Don_M states a good quality amp (not more expensive just the correct amp) will lower the noise in your system, adding often as much reception ability as an antenna twice the size. So a good low noise amps except in urban areas always helps.

Even with a high gain antenna you could run a CM7777 if you want. But you probably don't need to spend more than just buying a Winegard AP8700. I suggest that upgrade from the Winegard HDP 269 because the Winegard AP8700 has an FM trap built in and you live near a lot of strong FM stations.

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Using those antennas and amps you won't need any baluns as the antennas and amps are all 75 ohms and match directly to coax. Also replace any coax over 10 years old while up on the roof.

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The more I understand, the less I know.