I would agree the Sinclair Antennas are well built and very broadband, but I had a horible time with a number of 4 bay vhf broadband units installed (and removed) in 2005. We bought a large number of VHF SLR-235 units new. The part number has changed but the antenna is the same current 4 dipole current model.
The performance stank, with wild patterns and imd generation from all the brand new antennas we bought and installed at different locations. What a let down vs the good performance of other Sinclair antennas we've purchased in the past. I figured it might be something we did, so I had a number of people check everything at least twice over. Yes we checked the harness phasing, element spacing yadda, yadda. But the same problem with 6 brand new antennas at 3 different locations? Anyway, the problem was never resolved... I contacted Sinclair Engineering to address the issue and never received a reply other than two or three quick emails to say they'd get back to me... which was last year. IWCE is the same week as Dayton... so my friends at Sinclair Engineering will hear more than a casual word when I see them in person about this. I'm sure the reason I never heard from them is probably just someone dropping the ball... but I buy a heck of a lot of big antennas... There was just a post here on the group about selling some of the dual 2 bay (pretty much the same model) Sinclair Broadband antennas. I would have jumped on that deal if I didn't have $12K plus worth of junk 4 bay antennas in storage. Friends of mine working for the State Goverment Radio Service tell me they have the same horible performance issues with their 4 Dipole Sinclair VHF broadband antennas. We replaced the Sinclair Broad band antennas with Andrews Decibel units and never looked back (yet). I'm sure your results will probably vary. cheers, skipp > "Jeff DePolo WN3A" <[EMAIL PROTECTED]> wrote: > Sinclair wideband dipole arrays are probably our best > bet (SD214-HL as an example). They cover 138-174 MHz, > available with either 1/4 wave or 1/2 wave spacing > from element to mast (go with half-wave if you want > to get close to omni, quarter-wave for a more unidirectional > pattern). Built like a tank. Telewave also has broadband > dipole arrays, but personally I like Sinclair's > construction better. > > > Have a question for the list. Is there an antenna (VHF) that > > will cover a 30mhz bandwith? (Reasonably) > > > > There is a system in Georgia incompassing the entire state > > using various tall towers. On the towers will be antennas > > that will be used for VHF Repeaters and VHF digital. (in the > > ham band) T > > > > he NWS is hoping to use the same antennas on a "Mesonet". > > (like this one http://www.mesonet.ou.edu/) They are looking > > at the government freq.s right now but thinks there may be > > something in the 175mhz band. > 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/
