Having used the DB-212 for a 6M repeater project, I can assure you they work extremely well (unless you are on a rf noisy hilltop like I was (emphasize WAS!) This is because they have more metal hanging out there to capture signals (half wave) but more important they are a side mtd antenna withe a cardiod pattern. Well, before someone pipes in, yes, for omnidirectional coverage you need two or four or, if you have LOTS of tower space, combine SIX of them like the 6M repeater in Nixa, MO that I posted info on recently. Here's a link to modification instructions on both the DB-201 and DB-212 http://www.xanaduu.com/db201/ OT = If someone knows where a 37 MHz DB antenna might be available please let me know, thanks W6 MTF
--- In [email protected], "Tyke" <tyke1...@...> wrote: > > good morning Martin, > > Why not use a db-201 folded loop ground plane instead? It is half the > length of the db-212 which needs at least 2 bays to be halfway decent. (they > make em with 3 and 4 bays also. the pattern off of the 4 bay is the best for > coverage. The 3 bay has too much 3 leaf clover effect). > > Anyhow, I have 4 of the db-201s' right now that i'm shortening for 6m. It > is only about 51-52 inches total height(1/2 wave folded loop). these > antennas' have no gain , but are DC grounded and will side mount Ok. Put it > about 4 ft. out from the tower. > > It seems to me that if you are restricted on antenna space and height then > it can't be a good location or have very good coverage to begin with. just my > opinion!!! These antennas areplentiful. just look for old busunesses or > Police , fire and city gov. locatons that used to use low-band many years > ago.a j-pole for repeater use is ok too, just real long!!! >
