I know they probably won't, but up to now this has not been an issue. Touch wood...
Obviously the folded dipole antenna is not much smaller than the normal quarterwave vertical, but it's an interesting design. It depends on how this size thing turns out, I can't tell yet how long it can be exactly. Probably it must not be longer than 1m, then this would still be too long. 73 Martin --- In [email protected], "Chuck Kelsey" <wb2...@...> wrote: > > A DB212 must be mounted with a metallic mast (or tower) parallel to, and > extending beyond, the element. It sounds like you may have rules this > antenna out as a possibility. > > A ground plane antenna is typically not side mounted on a tower. Depending > on the distance of the platform rail to the tower, it may work. > > One option: > http://www.krecoantennas.com/fgplane.htm > > If it's a commercial site, they may not permit a home-brew. > > Chuck > WB2EDV > > > > > ----- Original Message ----- > From: "cruizzer77" <atlant...@...> > To: <[email protected]> > Sent: Wednesday, February 03, 2010 9:34 AM > Subject: [Repeater-Builder] Re: Space-saving 6m repeater antenna? > > > > > > > > You're right, the mounting location is on the lowest platform of this > > particular mast at a height of about 15m. The antenna is to be mounted > > sideways to the rail of the platform. Probably it would be possible to > > mount 2 antennas on the opposite sides of the platform, but this is not > > clear yet (was a question for the DB212 also). > > > > Is there somebody on this list who has built a shortened (i.e. base > > loaded) 6m antenna, probably for mobile use? I'd be interested in the > > design and the experiences with it. Not much is to be found on the net > > regarding 6m designs in particular. > > > > 73 > > Martin > > > > > > > > --- In [email protected], "Chuck Kelsey" <wb2edv@> > > wrote: > >> > >> You haven't given us a clue as to the mounting location. > >> > >> A ground plane antenna is going to be about 54" high and would be about > >> the > >> shortest configuration I can think of. A base-loaded mobile antenna > >> mounted > >> on a ground plane would be a few inches shorter. > >> > >> Chuck > >> WB2EDV > >> > >> > >> > >> ----- Original Message ----- > >> From: "cruizzer77" <atlantis7@> > >> To: <[email protected]> > >> Sent: Wednesday, February 03, 2010 8:25 AM > >> Subject: [Repeater-Builder] Space-saving 6m repeater antenna? > >> > >> > >> > For our 6m repeater project I had planned to use a DB212 clone as an > >> > antenna. But the repeater is to be located at a commercial site > >> > unfortunately and it turned out lately that antenna height is > >> > restricted > >> > so much that the height of about 2.5 meters of a single DB212 may > >> > already > >> > be too much. > >> > > >> > Can anybody tell me something about a 6m repeater antenna which is > >> > optimized for reduced vertical space but is still polarized vertically? > >> > I > >> > guess if the DB212 is too tall the height of another antenna will need > >> > to > >> > be half that size or even less. I'm interested in a homebrewable design > >> > primarily, I was also going to build the DB212 clone myself. > >> > > >> > 73 > >> > Martin > >> > > >> > > >> > > >> > ------------------------------------ > >> > > >> > > >> > > >> > Yahoo! Groups Links > >> > > >> > > >> > > >> > >> > >> -------------------------------------------------------------------------------- > >> > >> > >> > >> No virus found in this incoming message. > >> Checked by AVG - www.avg.com > >> Version: 9.0.733 / Virus Database: 271.1.1/2664 - Release Date: 02/02/10 > >> 14:35:00 > >> > > > > > > > > > > ------------------------------------ > > > > > > > > Yahoo! Groups Links > > > > > > > > > -------------------------------------------------------------------------------- > > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 9.0.733 / Virus Database: 271.1.1/2665 - Release Date: 02/03/10 > 03:09:00 >
