Skipp, Can you explain why the DB201 is prone to intermod? Why is it any more prone than a DB410, DB224 or any other folded dipole antenna? This is interesting, I have never heard of this problem before.
Paul WB5IDM -----Original Message----- From: [email protected] [mailto:[EMAIL PROTECTED] Behalf Of skipp025 Sent: Sunday, December 11, 2005 1:51 PM To: [email protected] Subject: [Repeater-Builder] Re: DB201 warning 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 Yahoo! Groups Links Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
