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The 4220 (2 bay bowtie) antenna has much greater directivity so it would tend to reduce multipath
The RCA antenna is mostly a VHF antenna with fairly low gain and directivity on UHF
Looking at all the buildings around you, it looks like you are seeing a lot of multipath due to those buildings
A more directional UHF antenna may reduce the out of phase multipath signal enough to eliminate the issue
A 4 bay bowtie may do the job so something like the DB4e or equivilent would be my choice
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