I am currently receiving broadcast HDTV on a Channel Master Model 3020
combo UHF/VHF/FM antenna. I have a rotator and also a mast mounted
antenna amplifier. I bring 75 ohm coax down and split the signal
several times.

My HD reception is usually good, but occasionally it's hard to aim the
antenna and sometimes the signal will drop out. VHF reception is very
good and I want to keep that capability.

I'm thinking that to improve my HD (UHF) reception I'd like to install
Channel Master's primo UHF antenna, the model 4228, which is a big
square "chicken wire" affair. In fact, I just bought this antenna.

My next problem is figuring out how to hook it up and still keep the
combo 3020 antenna in service for my VHF and FM stations. I could
mount the 4228 on the same mast and use a 300 ohm combiner to bring
leads from both antennas together, but will the UHF signals from the
3020 and the 4228 combine properly? Or will I get the possibility of a
phase mismatch? To solve this, can I somehow disable or disconnect the
UHF portion of the 3020 antenna and then use the 300 ohm combiner with
the 4228?

Also, if I mount both these antennas on the same mast, will they
somehow interfere with one another? I'm assuming I could separate them
by about a foot or so.

Thanks in advance for any insight on this.

Rick Sink