Thank you for your reply with further background information.
It is not necessary for you to quote my whole post.
Your present antenna has much more gain than the RCA ANT751, and it is larger because it has more gain and it also covers real channels 2-6 VHF-Low, which may or may not be important to you.
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KVCR is not a station we watch. If that's the issue with all the other stations, can I block KVCR's signals? (91.9Mhz) AND The FM signals in that range?
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The HLSJ will block everything below TV CH7 including the FM band and CH 2-6, but it will not block KVCR. That would require a custom band stop filter for real channel 26 from Tin Lee Electronics (expensive) or from Jan Jenca (less expensive) in eastern Europe who sells on ebay.
http://www.tinlee.com/index.php
http://www.tinlee.com/NotchTraps.php...ategory=offAir
If you want to experiment, you can try a notch filter that removes 24-29.
ChannelPlus ModelNF-471 Notch Filter
https://www.amazon.com/Linear-NF-471.../dp/B000J3AEYA
The Jan Jenca ch26 filter would probably be about the same price, but is a custom order from Slovakia.
http://www.antenne-komponenty.eu/eng...zlucovace.html
they also sell combiners
http://www.avsforum.com/forum/25-hdt...l#post37732809
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(I cannot tell you how many times I climbed that steep roof just to tweak the antenna!)
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When the aim is that critical for the 277-281 degree LA channels, that might be an overload symptom.
It is balancing act, between the strongest and weakest desired channels, which is called the dynamic range. You went from a low gain antenna with a medium gain preamp to a high gain antenna with a high gain preamp. The best compromise might be a high gain antenna with a medium gain preamp, but it might require further experimentation by you. I suggested the HLSJ because it is an inexpensive and fairly easy first step.
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I just received my LTE filters from the UK but I do not think this is the correct range here in the US.
(Frequency range : VHF 5 - 300MHz (400Mhz trap)
Frequency range : UHF 470 - 790MHz)
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Your thinking is correct, passing up to 790 is too high. TV channel 51, our present highest channel, is 692 to 698 MHz. The Channel Master LTE filter seems more like what is presently needed in the US, but only if there are cell transmitters just above CH51 in your area.
http://www.channelmaster.com/TV_Ante..._p/cm-3201.htm
https://www.google.com/?gws_rd=ssl#q...ter+lte+filter
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I read that US LTE will soon be utilizing the 600Mhz range which seems to cut into many stations here in the So. CA area.
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Yes, the FCC will be selling off even more UHF TV channels to commercial interests, which will again squeeze the TV broadcasters even more. That bothers me a lot. I consider those frequencies a natural resource that belongs to all citizens, not for the enrichment of a private business.
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Does the 7777 pre-amp have a sufficient FM trap?
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It does have an FM trap with an attenuation stated as at least 15 dB, but they don't give any further details, like an attenuation vs freq curve. I don't really know if it is sufficient, that is why I have suggested tests.
http://www.channelmaster.com/TV_Ante..._p/cm-7777.htm
The Antennas Direct Juice preamp has a 4G LTE filter built in, but no FM filter.