WDSD tower is south of me I live near Garrisons Lake. I repaired the old RS antenna and I get all Phily channels on UHF at 75% or better except for channel 6 VHF. Would like to find a small form factor VHF for the attic to grab that one. Also at the time my run is about 50 ft. No preamp. Thanks, Rick
Just to make sure we're talking the same RS 75R antenna, is this yours pictured here ? :http://www.hdtvprimer.com/ANTENNAS/VU-75XR.html
The 75R antenna gets about 4 dbi in Raw Gain at channel 6, on par with most combo antennas, even some that are much bigger. But Net Gain is about zero, which means the SWR on it is over 8.5:1 at 300ohms. Not good for digital which should be 2.7:1 SWR or less. http://www.hdtvprimer.com/ANTENNAS/comparing.html
(I have that NEC model of the 75R from Ken Nist so I could play around with it to try to get more Net Gain on channel 6, but it will take some time)
To get a significant increase, youll need something like the 190R or YA-1026 or 3671 etc which are much much bigger antennas.
The most compact channel 6 antenna, with significant gain increase over what you have now, is the no longer made Wade Delhi 5Y6S single channel antenna.
You can make your own from plans here: http://www.digitalhome.ca/forum/show...ght=delhi+5Y6s
(Note that measurements are in centimeters in the first post, and the boom length is 184 CM not 84 CM, which makes it a little over 6 feet long. It has 9.29 dBi Raw Gain with a SWR of 1.69 at 85 mhz, Net Gain of about 8.9 dbi. http://www.digitalhome.ca/forum/show...4&postcount=22
I think the easiest thing to do is to move the antenna high outside, either with a mast or a chimney mount. That will improve your uhf stations too. Im surprised those uhf stations are doing so well in the attic with that RS antenna.
Another thing you could quickly try is moving the antenna in the attic, it may be near big metal or close to electrical wiring.
Do you already have a CM4228 ?