I've got to post this information regardless of opinions.
The UHF DB-201 UHF 450-470 antenna is a well known IMD
generator when placed anywhere semi close to other metal
objects.
I fought many a gremlin sourced back to the UHF DB
antenna. (no problems to report with the vhf or low
band version). Motorola used to supply them with new
base station installs sold to customers.
Customers would put the UHF Antenna in or around a
building and it would inter-react with nearby objects
and crap the whole system.
I lost count over the number of problematic db-201
type/brand uhf antennas I changed out repeater systems
through the years.
There are a number of antenna models, which have
proven to be real trouble makers. The UHF DB-201 is
one such animal. Another is the VHF Sinclair SLR/SRL-235
antenna.
Avoid using the UHF DB-201 or equivalent antenna
where possible. Unless you're into self abuse.
cheers,
skipp
> > Anyone know if there are any differences between the
> > Hi-band vs. the UHF versions of the DB201? ie. can
> > one tuned for 170MHz be retuned for 450?
> > Looking at the drawings and specs they all seem to
> > be the same with the exception of the low band ones
> > having a longer support pipe.
> > Thanks,
> > Steve
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