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Old December 27th, 2007, 05:20 PM   #1
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Extending range of Sennheiser G2 Wireless

I've been using a few sets of Sennheiser G2 systems with the body pack transmitter and receivers on location for some indie movies. I find their range to be very limited. And yes I usually scan frequencies at every location. Is there anything I can do to improve the reception? Can I rig some sort of antenna system on the cart?
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Old December 27th, 2007, 06:07 PM   #2
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Originally Posted by Sammy Huen View Post
I find their range to be very limited.
What do you consider very limited?
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Old December 27th, 2007, 06:39 PM   #3
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One little detail that is frequently overlooked is to get the receiver antenna in the same orientation as the transmitter antenna. It helps.

You mention a cart. Is it perhaps made of metal? This can do some funny things to the signals, especially if the receivers are lying on it so that the antenna are parallel to the surface.

Perhaps you can get your receivers closer to the action?
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Old December 27th, 2007, 07:05 PM   #4
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Point both receiver and transmitter antennas down toward the ground, you can flip the mounting brackets on both. We keep all of our transmitters upside down. Waves bounce off of the earth.
Bracket1.com makes a cool bracket to mount your receiver upside down.

If possible, keep 'em in the line of sight - transmitter antenna can see receiver antenna.
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Old December 27th, 2007, 07:23 PM   #5
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Instead of rigging up an elaborate antenna system, just put the receivers on a microphone stand or tripod and move them closer to the source. If you have more than one receiver attach them to the one stand and just run an XLR loom to the stand so that you only have one cable running from the cart to the stand. It's quick, painless and will save you a lot of money as opposed to building your own booster system. If you really want to keep everything on the cart then Shure makes boosters for their own line of products, you could probably modify them to suit your G2's.
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Old December 27th, 2007, 09:55 PM   #6
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Moving the receivers would be my first choice. There are also directional antennae for receivers. You mount them on a mast, connect them to the receiver with coax and point them at the talent.

Regards,

Ty Ford
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Old December 27th, 2007, 09:56 PM   #7
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change to the rack mount receivers. the diversity rx circuits in them will give you MUCH more useable range than the camera mounted receivers. then you can add higher gain directional antennas (a2003uhf), and if you really want, add the AB2 filter/boosters for even more range.

I have all of the above (and 500 series units) and regularly get 1000-1500 feet of usable range with clear freqs.

if you don't want to sink all that dough, getting the tx/rx closer together as mentioned previously is your best bet...
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Old December 28th, 2007, 04:44 PM   #8
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Thanks for all the suggestions! I don't really need 1000 feet range, I really only need 200 feet of reliable useable range. I will try out a few of these methods next time.
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Old December 28th, 2007, 09:16 PM   #9
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200 feet can be easy or hard, depending on the specific setting of the shoot. To get more reliable performance at that range you'd want diversity receivers and preferably amplified antennas. I regularly do 300'... but not with my G2 set, with Sony 800 series with rack-mount UHF diversity with amplified antennas.
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Old December 30th, 2007, 04:51 PM   #10
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Originally Posted by Sammy Huen View Post
Thanks for all the suggestions! I don't really need 1000 feet range, I really only need 200 feet of reliable useable range. I will try out a few of these methods next time.
Hi Sammy,

Geez, 200 feet shouldn't be a problem provided:

1. You don't have interference (if so, use another frequency)

2. You have line of sight (if not, move tranmitter around body, relocate receiver using longer XLR cable if necessary)

3. Ensure the antenna dipoles are aligned (up/down vertically)

With good line of sight, I can easily get 300-600+ feet with various Sennheisher G2 configurations:

http://www.bridgehands.com/audio

BTW, I was intrigued by Guy's suggestion to realign the transmitter/receiver upside-down. My sense it that would be more effective at higher frequencies (600Mhz); if fact, if you absolutely cannot get a free line-of-sight propogation path, at higher frequencies you might consider realigning your gear to bounce the signal off a metalic surface (trial and error).

Good luck, Michael
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Old January 1st, 2008, 12:56 PM   #11
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Thanks Michael for the tips. Yes 200 should not be a problem but many a times it is. I almost always scan frequencies at new locations but it seems they're hit or miss. I will try some of the techniques mentioned here on my next gig.
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