jacefivesound Posted January 17, 2012 Report Share Posted January 17, 2012 Hey all, I have looked both here and online and can't find anything... I was reading the latest 'Sound & Picture', having a look at the article about Stuart Wilson, the mixer of 'War Horse', an excellent read. Anyway, I noticed his antennas, shark fin type, but with just the actual poles. I read he uses audio LTD wireless, but didn't find any audio LTD antennas, so I'm just curious what his antennas are, as I've never seen them before. Here's a link to the periodicle, which is excellent. Thanks! J Quote Link to comment Share on other sites More sharing options...
Jim Gilchrist Posted January 17, 2012 Report Share Posted January 17, 2012 Hey all, I have looked both here and online and can't find anything... I was reading the latest 'Sound & Picture', having a look at the article about Stuart Wilson, the mixer of 'War Horse', an excellent read. Anyway, I noticed his antennas, shark fin type, but with just the actual poles. I read he uses audio LTD wireless, but didn't find any audio LTD antennas, so I'm just curious what his antennas are, as I've never seen them before.Here's a link to the periodicle, which is excellent. Thanks! J They're yagi antennas. You should be able to get them lots of places, but for sure from Vark Audio which is the retail end of Macarthur Group, the US Audio, Ltd. distributor. They are light and have a low wind profile, but are fragile. Best regards, Jim Quote Link to comment Share on other sites More sharing options...
rich Posted January 17, 2012 Report Share Posted January 17, 2012 Audio used to list those antennas on their website, in the UK exclusives section, though it doesnt seem to be working for me at the moment. doubtless if you contacted Audio they will tell you more about the antennas, though i believe they are 3 element Yagis. i got my self some Yagis, though not from a broadcast manufacturer, but from a specialist manufacturer who doesnt usually deal with broadcast and so dont charge a load of money - think it was around £80 for 2 3 element yagis with memory steel elements which dont get trashed when you (I) pack them away (yet). Quote Link to comment Share on other sites More sharing options...
jacefivesound Posted January 17, 2012 Author Report Share Posted January 17, 2012 Sweet, thanks guys! Yeah, the wind is definitely on my mind... Thanks again! Quote Link to comment Share on other sites More sharing options...
Jeff Wexler Posted January 17, 2012 Report Share Posted January 17, 2012 Someone with much more knowledge of antennas may add to this, but Yagi-style antennas are by their very design and method of operation are much more directional than log periodic (shark fin-style) antennas. They also have more gain but operate in a narrow bandwidth with support for a specified block of frequencies (unlike shark fins which are broader band, usually 400 mhz to 800 mhz. Quote Link to comment Share on other sites More sharing options...
LarryF Posted January 17, 2012 Report Share Posted January 17, 2012 You seem to have it pretty correct, Jeff. Yagi-Uda antennas are higher gain with narrower beam width and smaller bandwidth than LPDA's. Interestingly the inventor was Uda with Yagi contributing some design theory yet Yagi gets the "name". The largest element at the rear is a reflector, the next element is the actual dipole antenna and the front element(s) are directors. If you want more gain (narrower beam width) you add more directors. The reflector and directors are tied directly to the boom, i.e., grounded. Gains of 20 dB are possible with 10 dB being easy to attain. The units shown are probably in the 6 dB region. Best Regards, Larry Fisher Lectrosonics Someone with much more knowledge of antennas may add to this, but Yagi-style antennas are by their very design and method of operation are much more directional than log periodic (shark fin-style) antennas. They also have more gain but operate in a narrow bandwidth with support for a specified block of frequencies (unlike shark fins which are broader band, usually 400 mhz to 800 mhz. Quote Link to comment Share on other sites More sharing options...
jacefivesound Posted January 17, 2012 Author Report Share Posted January 17, 2012 Dead on, Larry. The 3 pole has about 6db gain and 60mhz bandwidth (from the Vark website). Seems pretty cool for the right application. As always, thanks for the info everyone! Quote Link to comment Share on other sites More sharing options...
davidm Posted January 17, 2012 Report Share Posted January 17, 2012 Those Yagi's antennas are made by Lintec in the UK. http://www.lintec-antennas.co.uk/pages/catalogue/cat_yagis.html Here's a better picture of the Yagi range on the Canford web site. You can order through Canford or purchase direct from Lintec. http://www.canford.co.uk/Products/28-801_LINTEC-LBY-RADIOMIC-ANTENNA-specify-frequency You can specify the frequency, bandwidth and number of elements and they'll make them up. David M Auckland, NZ. Quote Link to comment Share on other sites More sharing options...
Mark LeBlanc Posted January 17, 2012 Report Share Posted January 17, 2012 Larry, in general would a Yagi have a tighter reception than Helical antenna? These look like they could deal with wind on a stakebed than Helical.. Quote Link to comment Share on other sites More sharing options...
studiomprd Posted January 17, 2012 Report Share Posted January 17, 2012 I have been a Yagi fan since my high school years, when I used a Yagi antenna on 2 meters HAM radio. Yagi's are polarized based on how they are mounted, but as I recall they are a bit more directional than a Helical. in practice I'd expect them to be close in performance, but of course it depends on many specific factors...starting with the number of elements. Quote Link to comment Share on other sites More sharing options...
LarryF Posted January 17, 2012 Report Share Posted January 17, 2012 The helicals have a wider bandwidth, same kind of beamwidth but will cover 500 to 700 MHz easily. They are bigger than a Yagi-Uda. Best, Larry F Lectro Quote Link to comment Share on other sites More sharing options...
nika paniashvili Posted January 20, 2012 Report Share Posted January 20, 2012 I have a pair of those with 6 elements and they perform just great and are very lightweight. had them out in very windy locations without any problem. Quote Link to comment Share on other sites More sharing options...
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