Piggie

If the OP turned the antenna at KVHP and KATC and could not get a signal, then I agree, it's most likely bad coax, since the balun was changed.

Go to the store and buy a piece of coax, RG6, and replace it. That is much less than an antenna. If it doesn't fix it, either find someone with a liberal return, or store it inside. Coax out of the weather lasts decades.

I also agree with EV, with every thing working perfect, you have the back of the antenna at KVHP and KATC unless you turn the antenna. 4228 has 20 db or so of front to back, lowering the NM figures seen by that amount. Then another 6 db of loss in the length of coax you are using would make KVHP and KATC right on the edge I would think pointed at KPLC / KLTL

geaux

Thanks guys for all your help. It is definitely RG6 all through the wiring. I pulled the antenna down yesterday afternoon and checked everything, and replaced the coax connector into the balun and cleaned the connecting point into the house. I also checked for any bends in the antenna and it was all fine.

I think I will try to relocate the antenna this evening; maybe that will help.

Also worth noting: My telescopic pole won't extend higher than 20 feet because it is stuck; I'll be trying some WD40 on the affected part, to try and get the antenna higher.

Eureka

20 ft should be more than sufficient based on your TVFool report. Raising it higher may help with KBTV, KADN, or channels below those, if you're trying to get them.

Something else major is wrong, though.

Piggie

It is possible something was built that is causing a reflection, which would wipe out channels. I have seen it here at my house, where suddenly WOGX on RF31 digital just started going nuts up and down with signal, freezing. That is when I went back to using yagi antennas, and have read of similar situations.

Also on the pole. If you have the man power, take the pole down, unmount everything, and get 2 to 4 people pulling and turning. Use WD40 and or oil. I have pulled apart many a telescoping pole that way.

The one I was using now was stuck. I pulled it out about 2 feet with three people and that was it. I put it up vertical so it could dry, and poured oil down it. About 2 months later I had to take it down and we got it all the way unstuck.