Ron, Thanks for the mounting information. I also lack the DB224 Mast that the four dipoles mount on. From my research the original is two pieces about twelve feet long that I believe bolt together, the diameter I have not been able to find. From the ones I have seen the mounting pole is quite robust. Do you have any pole stock that you could recommend that would hold the DB224 on a side mount configuration? As I recall although the mast was very rigid, it was quite lightweight. Thanks JIM KA2AJH _____
From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Ron Wright Sent: Tuesday, June 24, 2008 12:23 PM To: [email protected] Subject: Re: Re: [Repeater-Builder] Reasonably low wind load antenna Jim, The DB224 is usually supplied with 2 clamps where each clamp attaches to the DB224 mast and the other side clamps to the tower/mounting pipe. I believe these are made for 2-1/2" pipe. At www.tessco.com you can see pictures of these clamps and also purchase them although they are not cheap. They are very rugged galvanized clamps with 3/8-1/2" bolts 8" or so long and nuts. I would recommend looking on e-bay or someone here that might have them. Another mount is side mounts. For DB224 18" off the tower is typical. These have V shaped pieces one at each end of 2 pipes. The V is clamped to the tower and the other end the DB224 is clamped. You really need 2 mounts for this, one at the bottom and one near the top. Usually the top mount is a single pipe with C/U clamps to keep the antenna from swaying and the bottom holds the antenna weight. The DB 224 can be top mounted without the fear of the swaying in the wind damaging it unlike fiberglass antennas. I like putting top and bottom mounts when one can, but if top mounted not done for obvious reasons (there is no top, hi). 73,ron, n9ee/r >From: Jim Cicirello <[EMAIL PROTECTED] <mailto:ka2ajh%40gmail.com> com> >Date: 2008/06/24 Tue AM 11:11:02 EDT >To: Repeater-Builder@ <mailto:Repeater-Builder%40yahoogroups.com> >yahoogroups.com >Subject: Re: [Repeater-Builder] Reasonably low wind load antenna > >Hi Ron Another Question Please: I was fortunate enough to buy a good DB224 >without the support mast. After following the opinions on wind loading, etc. I >am wondering what can be used for a support mast and where the masting might >be purchased? Any ideas? Thanks JIM KA2AJH ----- Original Message ----- >From: Ron Wright To: Repeater-Builder@ ><mailto:Repeater-Builder%40yahoogroups.com> yahoogroups.com Sent: Tuesday, >June 24, 2008 7:47 AM Subject: Re: [Repeater-Builder] Reasonably low wind load >antenna > >Tony, > >First the Ringo-Ranger does not have the 7 dbi gain. To think a smaller 12 ft >antenna would have about the same gain as one the size of a 4 bay dipole is >not realistic. One note of info...antenna manufactures, especially from Japan, >lie all the time. I would not use such harsh words except after years of this >junk something needs to be said. I is said here on this board all the time for >many know antenna performance here, hi. > >Your wind loading limits will require a smaller, lower gain antenna. If ice is >a problem the Ringo-Ranger will probably not last that long. > >I would recommend going to www.tessco.com, a distributor of 2-way gear, and >check thru their antenna section. They have a number of finnne manufactures >with their specs. > >73, ron, n9ee/r > >>From: Tony VE6MVP <[EMAIL PROTECTED] <mailto:tony%40ve6mvp.com> com> >>Date: 2008/06/23 Mon PM 10:28:11 EDT >>To: Repeater-Builder@ <mailto:Repeater-Builder%40yahoogroups.com> >>yahoogroups.com >>Subject: [Repeater-Builder] Reasonably low wind load antenna > >> >>Folks >> >>We're moving a VHF amateur repeater to a 96' Trylon self supportingtower. >>The overwhelming opinion is that our current 210C4 four bayfolded dipole >>would be too much of a weight and wind load for thattower. >> >>One comment has been the Ringo Ranger. The wind load of theCushcraft Ringo >>Ranger II >>ARX2Bhttp://cushcraft.com/comm/support/pdf/RINGOS%20AR2%206%2010%20ARX450%20220B%202B.pdfis >> 0.5 square feet. The windload of the Sinclar SD214 http://www.sinclair >><http://www.sinclairtechnologies.com/catalog/resources/pdf/SD214-HF2P3LDF> >>technologies.com/catalog/resources/pdf/SD214-HF2P3LDF(D00S-LSABK)-DI.pdf >>(newer model to 210C4) is 5.57 square feet. Although the ice area is 17.04 >>sq ft. The SD214 has a dbd gain of 7.2, dbi of 9.3. The Ringo Ranger has >>dbi gain of 7.0. However the coverage plot in rural slightly hilly Alberta >>isn't all that much different. >> >>What would be suggestions for an alternative? Comments? >> >>Thanks, Tony >>(rapidly learning lots about towers and repeaters) > >Ron Wright, N9EE >727-376-6575 >MICRO COMPUTER CONCEPTS >Owner 146.64 repeater Tampa Bay, FL >No tone, all are welcome. > > Ron Wright, N9EE 727-376-6575 MICRO COMPUTER CONCEPTS Owner 146.64 repeater Tampa Bay, FL No tone, all are welcome.
