+ Post New Thread
Results 1 to 11 of 11
AV and Multimedia Related Thread, Wireless Microphone 2.4GHz, UHF or VHF? in Technical; Hey guys. So, we're looking at purchasing some wireless mics, but one of the things that's bugging me, is which ...
  1. #1

    Join Date
    Jun 2007
    Location
    Leicestershire
    Posts
    82
    Thank Post
    24
    Thanked 3 Times in 2 Posts
    Rep Power
    15

    Wireless Microphone 2.4GHz, UHF or VHF?

    Hey guys.

    So, we're looking at purchasing some wireless mics, but one of the things that's bugging me, is which system to go for? Looking at using the unlicensed channels, but not sure of which system to go for.

    Thing that's putting me off with the 2.4GHz is that we don't want it to interfere with the wireless across the school. Received a message from one reseller telling me that the manufacturer had done tests alongside wifi, and their systems worked better than a competitors system... The thing that puts me off still, is that the manufacturer would say that anyway, and what does better mean?!

    Anyone here had any experience?

    Cheers,

    David

  2. #2

    localzuk's Avatar
    Join Date
    Dec 2006
    Location
    Minehead
    Posts
    17,873
    Thank Post
    518
    Thanked 2,486 Times in 1,928 Posts
    Blog Entries
    24
    Rep Power
    838
    How many microphones will you want, and how far from potential other wireless microphone users are you?

  3. Thanks to localzuk from:

    lovelldr (20th May 2014)

  4. #3

    Join Date
    Jun 2007
    Location
    Leicestershire
    Posts
    82
    Thank Post
    24
    Thanked 3 Times in 2 Posts
    Rep Power
    15
    Quote Originally Posted by localzuk View Post
    How many microphones will you want, and how far from potential other wireless microphone users are you?
    Not quite sure on how many mics they want altogether. Waiting for them to confirm. But, I would imagine about 4.

    There is unlikely to be any other microphone users nearby, as we have quite a large field/playground around one side, and the other side is residential housing. There is another school, but they's approximately 300m away from the hall where they will mostly be being used...

    Thanks

  5. #4

    webman's Avatar
    Join Date
    Nov 2005
    Location
    North East England
    Posts
    8,406
    Thank Post
    640
    Thanked 961 Times in 661 Posts
    Blog Entries
    2
    Rep Power
    324
    From my experience UHF ones are much better than VHF ones, but I'm not sure how they compare to 2.4GHz ones. The school I worked at previously had 2 sets of Sennheiser UHF wireless mics which were very good quality - but I don't know what model they are They had a decent selection of channels to choose from so there shouldn't be any interference issues with other mics.

  6. Thanks to webman from:

    lovelldr (20th May 2014)

  7. #5

    Join Date
    Oct 2005
    Posts
    849
    Thank Post
    51
    Thanked 115 Times in 105 Posts
    Rep Power
    74
    Have a look at some Shure wireless mics - I'm pretty sure they operate somewhere around 840Mhz.
    Plus - they're pretty much industry standard... so they'll definitely work.

  8. #6

    localzuk's Avatar
    Join Date
    Dec 2006
    Location
    Minehead
    Posts
    17,873
    Thank Post
    518
    Thanked 2,486 Times in 1,928 Posts
    Blog Entries
    24
    Rep Power
    838
    From memory, you can only have 4 unlicensed VHF mics, so if you wanted more, you'd not be able to use more VHF frequencies I don't think.

    I'd recommend just going for UHF. We went for licensed ones here, as we have a couple of schools and a theatre nearby so we wanted to make sure we didn't get any overlap. £135 for 2 years for a license.

    So, we have 6 x Sennheisser XSW mics in use here, with enough frequencies licensed to us to allow us to expand to about 16 I think!

  9. #7

    dhicks's Avatar
    Join Date
    Aug 2005
    Location
    Knightsbridge
    Posts
    5,653
    Thank Post
    1,258
    Thanked 781 Times in 678 Posts
    Rep Power
    236
    Quote Originally Posted by lovelldr View Post
    So, we're looking at purchasing some wireless mics, but one of the things that's bugging me, is which system to go for? Looking at using the unlicensed channels, but not sure of which system to go for.
    We bought a set of 4 "Chord" branded wireless mics:

    Chord QU4 Quad UHF Wireless Handheld Mic Microphone: Amazon.co.uk: Electronics

    You can get sets with 4 handheld mics, 4 headsets or a mixture of the two - individual spares are available, but it works out cheaper to just buy a second full set if you want a full set of both. We've found it to be an excellent bit of hardware - I'm sure the mics aren't up to "pro" standard, but they seem to do just fine for assemblies and so on, and both the handheld and headset mics are robust enough to last okay in a school environment. You can only use 4 mics at a time, but for more channels than that you would be looking at licensed wireless kit starting at a couple of thousand pounds. We haven't had any problems with interference, either with our wireless networking or in general, and although the church next door use mics on the same set of channels we have so far avoided interfering with each others assemblies / church services. The above set is on Amazon, where they seem to be cheapest, although several educational suppliers seem to be offering the same equipment (for slightly more, generally).

  10. #8

    dhicks's Avatar
    Join Date
    Aug 2005
    Location
    Knightsbridge
    Posts
    5,653
    Thank Post
    1,258
    Thanked 781 Times in 678 Posts
    Rep Power
    236
    Does anyone know what the legality of short-range FM transmition is these days? I've seen a couple of cheap sets of 8 mics that transmit on FM frequencies - did the law regarding very short-range FM transmission change, or are they simply not legal for use in the UK?

  11. #9

    localzuk's Avatar
    Join Date
    Dec 2006
    Location
    Minehead
    Posts
    17,873
    Thank Post
    518
    Thanked 2,486 Times in 1,928 Posts
    Blog Entries
    24
    Rep Power
    838
    Quote Originally Posted by dhicks View Post
    Does anyone know what the legality of short-range FM transmition is these days? I've seen a couple of cheap sets of 8 mics that transmit on FM frequencies - did the law regarding very short-range FM transmission change, or are they simply not legal for use in the UK?
    Wireless Mic's are only permitted in UHF and VHF frequencies, either in the licensed or unlicensed channels. Short range FM isn't legal over here unless you have a "Restricted Service License".

  12. Thanks to localzuk from:

    dhicks (20th May 2014)

  13. #10

    localzuk's Avatar
    Join Date
    Dec 2006
    Location
    Minehead
    Posts
    17,873
    Thank Post
    518
    Thanked 2,486 Times in 1,928 Posts
    Blog Entries
    24
    Rep Power
    838
    Oh, another thing to note - quality of build matters hugely if you're going to be handing them to kids. We've used cheap branded mics here before and they all end up in bits from kids being unable to use their hands correctly. The only ones I've personally found that can survive the onslaught are the Sennheisser XSW or heigher models.

  14. #11

    Join Date
    Apr 2008
    Location
    Keighley, West Yorks
    Posts
    340
    Thank Post
    52
    Thanked 51 Times in 45 Posts
    Rep Power
    22
    Whilst there are 6 unlicensed VHF frequencies that can be used for Radio Mics, I believe you can usually only fit four in without intermodulation (ie without affecting each others' signal). The 6 are 173.800, 174.000, 174.200, 174.400, 174.600 and 175.000 but I can't remember which four I used to use.

    The unlicensed frequency band for UHF (called Band F or colloquially Channel 70) is 863-865mhz. I regularly use four Audio Technica 3000 series radio mics in this band on channels 863.375, 863.875, 864.125 and 864.625.

    You can then buy a Shared UHF license (£175 for 2 years as given above) which allows you to use any of the 11 specific Band U (Channel 38) frequencies between 606-614mhz. This doesn't guarantee non-interference as any other local group can buy the same license.

    Or you can buy a co-ordinated UHF license which guarantees you sole access to the specific frequencies in the band you apply for - we use 8 frequencies in Band C (Channel 30).

    Between my Church and our school theatre, we use 23 Audio Technica 3000 series radio mics. 4 on Band F (Ch70), 11 on Band U (Ch38) and 8 on Band C (Ch30). We share each others mics for the larger events as I'm technician for both venues.

    Peter

  15. Thanks to howartp from:

    dhicks (20th May 2014)

SHARE:
+ Post New Thread

Similar Threads

  1. Power supply for wireless microphone
    By speckytecky in forum Hardware
    Replies: 6
    Last Post: 8th July 2009, 08:42 AM
  2. Wireless Microphones - Need advice please?
    By kfq61 in forum AV and Multimedia Related
    Replies: 14
    Last Post: 6th July 2009, 04:17 PM
  3. Replies: 7
    Last Post: 26th March 2009, 09:42 PM
  4. Wireless Microphones
    By theeldergeek in forum Hardware
    Replies: 16
    Last Post: 4th June 2008, 07:04 PM
  5. Wireless microphones
    By SpuffMonkey in forum Hardware
    Replies: 1
    Last Post: 26th January 2007, 02:37 PM

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •