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Lectrosonics SNA 600 Antenna

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I have been doing alot of antenna research the last few weeks and think this is the best choice for me here is my situation:

I do mostly fast pace reality work with 4-6 wireless plus a zaxcom hop. I sometimes need to set up farther away from where we are shooting then I would like. I need something that is easy to transport and quick to set up to give me more range. I am in blocks 27 and 21 so I was thinking about buying two of one for each block to increase my range I like that they fold up and the price is also good. I would like some user feedback or suggestions on a better set up.

Thanks

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They work really well!

Are you working out of a bag, or do you have a cart/table setup where you can mount it on a stand?  If you are stationary, why not go for a more directional antenna?  Do you plan on using one for the Zaxcom Tx as well?  I have been thinking about doing so for the right situation but haven't done so yet.

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No my Zaxcom has plenty of range. I just like the price point on these and how small they are. I may need to use them in the bag too

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I use the Lectrosonic SNA 600's for my rig, over the traditional wide band "bat wing". I like the fact that the antennae can be tuned to the specific block you are using. It has been working great for me with my two venues spread over block 21 and 22.

post-284-130815081565_thumb.jpg

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Whitney and Phil,

Between the venues and the SNA's it's 50 ohm RG-8U. I use a pair of SNA's - (diversity) and the length of the antenna arms is set to the bandwidth of Block 21 - 22  (537.600 - 588.700). Or approximately 3/4 the way between the 550 mark and the 600 mark.

Download the PDF file I've linked to.

http://www.lectrosonics.com/catalogs/UniversalCatalogPages/sna600td.pdf

Oh, the second set of SNA's is a leftover from the days of two racks of 411a's.

RL

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Whitney,

PSC does have a smaller unit that might work.

(http://professionalsound.com/specs/multi.htm)

p.s.

PSC has an awesome one called the MultiMax RF (http://professionalsound.com/specs/multimax.htm) I used this one on my last Reality Show.

p.s.s.

I'm a SNA600 fan too.. but you have to keep all the Lectro's in the same blocks because of the settings on the antennas.

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" Which RF splitter combiner "

" Do I need one or two antenna per block "

" I need something that is easy to transport and quick to set up to give me more range. I am in blocks 27 and 21 "

let's see,  who could you ask??

Antennae for wireless is a topic that is frequently discussed, so doing that research (like doing searches, and contacting experts (you know what I mean!!) is really important

the user experiences and comments part: not mentioning a lot of the obvious stuff, the SNA's are reasonably priced and effective; they are more narrow band than LPDA's so less effective for wide frequency (multi-block) splits and in those cases, also consider there is also interaction amongst antennae possible.  There is a lot of physics at work, and many would say Voodoo is involved, too, so individual results are always varying, and even experienced folks will have different subjective opinions on what was best, and that can change from day to day, and location to location.

Ham radio operators (amongst other groups) have been experimenting with antennae for decades, and still are today; there are hundreds of workable choices,  and there is no single best alternative!

in my own case, in circumstances similar to what you describe, I have had great success with the "coaxial dipole" antennae, which seem, in practice, to provide an improvement over the Lectro whips, although I have also found that making my own 1/2 wave whips also seems to provide a slight improvement over Lectro's 1/4 wave whips as well.  for diversity, I often use one 1/4 wave and one 1/2 wave whip, or one coax dipole and one whip (either size), and am pleased with the results, although "experts" seem to think that for Lectro's diversity system, matched antennae pairs are preferred. also bear in mind that free space and other objects -including equipment and people- near antennae affect their performance. I have a supply of SNA's available, and when appropriate I really love my Yagi (not LPDA!) antennae.  a quality UHF single splitter's loss is usually acceptable, if one makes a noticeable difference, there is usually something else wrong!!

I try to use the lowest loss coax possible for any situation, and prefer preamps before long runs of any coax (and I have done some major facility installs!)...and when possible I prefer the "preselector effect" of a narrow band preamp.  As I have mentioned before, I have never failed to get several systems operating on any block, anywhere! thus I use 2 adjacent blocks, a third adjacent block for IFB (my primary block is the one in the middle!) and eliminate any overloading and IM problems by physical separation, as even inches make a significant difference.

I suggest the ARRL's (www.arrl.org) antenna handbook (updated every other year, that is how variable antenna information is!!) for more information on antennae, and the appropriate HAM radio band (I've been on VHF and UHF for many, many years!) is the 450 MHz band...

finally, an excellent place to discuss with users, Lectro antennae and their implementation would be the Lectro discussion group

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On 2-8-2017 at 11:47 PM, Trey LaCroix said:

I use them with my block 19 and 20 receivers just fine. I think they cover 100mhz from the center frequency.

I was thinking so, but wasn't sure. Perfect!

5 hours ago, Jonathan Michael Lau said:

thanks!

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I use the SNA600 almost exclusively (two for diversity), and they work really well. I also use them for my comtek transmitter antennas by adding the 216mHz extensions (https://www.trewaudio.com/product/remote-audio-miracle-whip-mw216-kit/). Early on during my last show I was having dropout issues, so I switched to two shark fins, and still had the dropout problems. The problem turned out to be a faulty IFB transmitter, so I changed that transmitter, switched back to the SNA600 folding dipoles, and all was good.

 

Granted, the shark fins have more gain, so in theory you can be further away, which is sometimes the case, IF they are pointing the right direction. For cart use, eventually they WILL be pointing the wrong direction, which will result in a decrease of gain compared to the folding dipoles. Also, when the actors are close to your cart (which is not all that unusual), the 8dB of gain from shark fins can overload the receiver input, causing audible problems. For these reasons, in my experience, portable shark fins are less reliable for cart use than folding dipoles. [edited Aug 7, 10am PDT ]

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