We're trying to cut the cable and have installed a Channel Master CM-4228 HD antenna with the CM-7778 preamp. The installation a 5' mast mounted to our chimney, about 30' off the ground. I ran new RG-6 cabling and ran a channel auto scan on a television with perhaps a total 40' cable run. We live in a fairly densely wooded area on Wagner Hill, just north of Monroe WA.
Here is the TV Fool radar plot for us:
http://www.tvfool.com/?option=com_wr...5b94c520f44054
The antenna is aimed at 216 degrees magnetic.
Here's what we're receiving:
KOMO-4 no signal
KING 5.1 - none
KING 5.2 - no signal
KIRO 7.1 and 7.2 - perfect
KCTS 9.1 - perfect
9.2 and 9.3 also good
KSTW 11.1 - perfect
KCPQ 13.1 - perfect
KZJO 22.1 - perfect
Also 22.2 and 22.3 all good
All this to say, we're very pleased with the exception of channels 4 and 5.
Any ideas why channel 7 is fine while the relatively co-located 4 and 5 are not and what we can do to receive 4 and 5?
Thanks so much for any help and advice.