On September 22, 2009 at 23:19, Daniel Tonks said...
If you do decide to combine, remember to do it with two antennas facing the EXACT SAME direction, with the exact same length of cable to the combiner. You're only going to get about 3db signal boost (minus insertion loss) with two antennas, but if you have multipath issues it can help increase directionality
You say "only 3 dB" but keep in mind that 3 dB is double the signal strength and that potentially can help a viewer overcome a problem. However, combining two antennas is always a sticky issue. There is much that can go wrong.
