So I have a problem with my setup.

With a 6' RG6 cable plugged into my Winegard YA-1713 antenna, I am able to pick up UHF channel 20 un-amplified with the antenna pointed 90 degrees away from the signal. The station is snowy, but still good enough to watch.

If I hook my zenith dtt900 up, that channel is on UHF 18, it reads 50% signal, not enough to decode, but close.

What can be done to reduce/eliminate this problem?

I have a 91XG, the YA-1713, a CM7777 pre-amp on a 25' mast and 80' of RG11 going to the house. I'm considering a bandstop filter from TinLee.

But the problem is the station can be picked up out-of band on my VHF antenna.

Is there any additional shielding I can do to say the pre-amp? Or better cable?

I have 100' of 1/2" hardline. I don't know the brand, but it is 75 ohm. Solid aluminum shield and copper clad aluminum center conductor. I haven't put the ends on it yet as I'm still trying to work out the kinks in my setup before cutting and terminating the good cable.

UHF 18 is putting out 522kW at 15 miles. My elevation is 500', the tower is at 2000'. UHF 20 is in the same location putting out 67kW.

TV fool indicates it is 1-edge signal, I think I have LOS up the river that comes off of Burke Mt. Once the leaves are gone in another month, I think the situation may be worse.

All other signals are over 40 miles away and I have 2-edge to them. I can pick most of them up at night, but I need to get rid of UHF 18 & 20. I can get the PBS from another tower in VT further away.

Thanks,

~ryan

The only thing I see that may be giving you a problem is FM; but it isn't that strong. THE 7777 shouldln't be passing any UHF on the VHF input and vice-versa.

You could try using both the UVSJ & HLSJ before the VHF input of the 7777 to further filter out all out of band signals. The HLSJ alone will still pass UHF on the HI output; so you will need the UVSJ to filter out the UHF. You should terminate all of the unused ports also.

This will eliminate all out of band issues; and only cause around 1 db of signal loss.

Have you tried disconnecting the VHF antenna temporarily to see if that improves the situation? If so, then filtering the VHF input as per Digital Rules should help.

Have you tried disconnecting the VHF antenna temporarily to see if that improves the situation? If so, then filtering the VHF input as per Digital Rules should help.

With just the VHF antenna hooled up with a short 6' cable to my TV set, I get UHF 20 & almost get UHF 18 digital.

With just my UHF antenna, I get a digital lock, un amplified if the antenna is pointed in any direction.

Thanks,

~ryan

Did you try running your coordinates instead of your address? I'm curious if TV FOOL will show channel 18 as LOS.

Did you try running your coordinates instead of your address? I'm curious if TV FOOL will show channel 18 as LOS.

Did that, same readings. I can see Burke Mt. from the roof of my house, so I don't see how it is 1-edge.

Did some more testing.

VHF antenna only, terminator on UHF port on pre-amp, I still get ch 18 UHF. Doesn't matter with or without FM trap in or out.

:-/

Install a trap that is tuned to the undesired channel.

Do you have a source for a trap I could use? I need one on the UHF port for UHF Ch 18 because it is picked up in any direction on my 91XG.

So for the VHF side, I'll need a trap that is a low-passband I'm guessing. Block anything above Ch14 which would work fine.

Any sources of an inexpensive one? Tinlee traps are nice, but at $115 shipped, they are not inexpensive.

~ryan

So for the VHF side, I'll need a trap that is a low-passband I'm guessing. Block anything above Ch14 which would work fine.

~ryan

As pointed out above, all you need to block 14+ is a UVSJ.