I haven't posted here in years, but I had to reply to this post.
Thanks for the picture I sent this to our engineers and they got a kick out of it!
I'm glad it’s working out for you, unfortunately in antenna design when you add performance in one area you will likely lose it elsewhere. We have looked at dozens of different scenarios to add VHF elements to the Bowtie antennas and the results were significant performance penalties somewhere in the UHF band.
To compound issues even more we have heard from station engineers that the ERP of many of the DTV stations reverting back to VHF have been cut significantly. This can make a difficult situation nearly impossible.
So for others having problems with VHF reception on their bowtie antennas we suggest two options.
If you have an older bowtie antenna such as the one pictured by fcondron, we will replace the old ferrite core balun with a new PCB balun. These offer much better high VHF capabilities since (in addition to being more efficient) it has the effect of turning the coax shielding in to a VHF radiator.
It’s not a magic bullet, but should give you 10-20 miles of range on high VHF (provided the station isn't broadcasting to the parking lot.) We have been using the PCB balun for about 2 1/2 years.
I have about 100 extra in the shop, we will send these out to previous customers no charge, just email: firstname.lastname@example.org
to request one.
If that doesn’t work then the other option is a two antenna solution, such as the Antennacraft, Winegard or our Clearstream 5 coupled with a UHF/VHF diplexer (DO NOT use a reversed splitter to combine antennas!)
Our C5 will begin shipping tomorrow and may be the more expensive option ($119) since the miter joints on the square tube aluminum must welded by hand. It is extremely efficient and compact for a VHF design. Our competitors make good antennas as well so I won’t launch into a commercial for our product on this forum.
I hope this helps