dual antennas? Why?
 

Here's my radar scan:

http://www.tvfool.com/?option=com_wr...4bbadf9b20d3c9

Now, I had an old RCA antenna about 4' long and I was receiving most all the channels in green (digital ones), but that's all. And on windy days we would loose the picture on weak channels and the audio would "dda,dda,add,aa,d,da" a lot and the picture would pixelate (is that a word?).

So, I did the analysis and it suggested the Winegard HD7696P. So I bought it and installed. I then got better reception, much less if any pixalation or "dadd,aa,ddd,a,aaadd" audio.

BUT, I completely lost channel 11 -- WXIA-DT; Real=10; (Virt =11.1); NBC; 57.2 NM(db); Pwr -33.7; LOS; 13.6 miles; 8* true and 12* Mag.

If you will look at the chart, Channel 30 and 46 are both in the same direction and same distance away, and I get them perfectly.

So, I went back up and put up my old antenna below the 7696P and connected them both.

Wa-la, I got Channel 11 back.

Why?

Total guess...

A strong FM signal causing interference?

A poor connection between a connector body and the shield braid??? Water in the coax???

'Luck of the draw' antenna placement in a null for CH-10???

Combining two antennas usually makes more trouble than it overcomes... but if it works, it's hard to argue.