Question about Microphones

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TV'S I am using an antenna, I get both UHF And VHF stations. My set is 15 years old, I would like to know if any new sets get both?

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Salutations tobusy2,

With the pending conversion to digital broadcasting on 2/17/2009; BestBuy™ stores are selling units with digital tuners as well as analog tuners. Standard analog tuners should still receive UHF and VHF stations, that is until the conversion when most of theses stations will stop broadcasting in UHF as well as VHF.

I hope this helps.
Jon
Go Ahead. Use Us.

Posted on Jun 18, 2008

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Ihave an old icom icm- 55 marine radio what ariel do i need and do i need to swr the ariel will a cb ariel work basically what do i need to do to get it working


All marine VHF radios must be licensed. A marine radio station must also have a call-sign allocated to the vessel it is installed in. Shore based stations can also be licensed but only where they are involved in marine based activities e.g Yacht Clubs, Marinas, Harbour Masters, Rescue Services etc.
In the UK ships radio licences can be obtained from Ofcom. They are free for non-commercial users.
The user must also have a Marine VHF Radio operators certificate. This requires taking an exam. In the UK contact the Royal Yachting Association for a copy of the syllabus and local examiners.
More information about the licensing rules, courses and exams can be found here. http://www.rya.org.uk/infoadvice/regssafety/Pages/licensingelec.aspx
The ICOM ICM55 is a good radio set and can still be used in an existing (marine) installation but it does not meet the standards for new installations as it does not have DSC (digital selective calling) capabilities - which all new fixed sets must now have. It is therefore very unlikely that you will be able to get a licence to install one.
To get it working you will need a proper marine band VHF aerial which operates in the frequency range 156-MHz. They usually come with cable attached but if a longer cable is needed, or the aerial is not cabled in the first place, use flexible 75 ohm co-axial cable with a copper core and braid/foil screen. Use proper aerial connectors (type F or BC are most commonly used and can be obtained from most good electronic component suppliers more cheaply than from a boat chandlers. Do not use push-fit TV aerial plugs)
Citizens Band radio works on the much lower frequency MHz band and therefore a CB aerial will not work with a marine VHF radio set. Please see this Wikipedia article for more information http://en.wikipedia.org/wiki/Marine_VHF_radio

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Change a Shure Beta 87A LX2-ZZ VHF to UHF


That would be nearly impossible to do. However, you should be able to get a schematic from Shure Service at service@shure.com

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How do I reset the F221 to factory settings. I cloned the unit with V1.6 of the programming software with updates that included turning on the user start password and now the box will not communicate with...


F121 VHF, F221 UHF they both use the latest Version 1.7.
For F121 Factory default as follows:Open your CS-F100 software, enter RX TX frequency below, and write to the radio.Ch1: 136.100 MHzCh2: 155.100 MHzCh3: 173.900 MHz
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Or you check from this site:http://www.two-way-radio-tools.com/icom.html
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All four hand held systems failed during a performance


Hi kb

That is an odd encounter, and most probably one of the R.F.I. kind. Radio Frequency Inference can be caused by many things. Sometimes it can be a nearby piece of equipment creating that much interference, that the mics could not operate. It may have been a spurious mobile radio transmitter as used with two way radio for the cops, ambo's, firies,or even a nearby Cab!! Some times faulty light dimmers can also spray RF.
To what ever end, the fact that 4 mics went down together is indicative of an external problem, and being radio mics, it would have been radio interference.
The only other thing to check is that they are UHF. there are many VHF mic systems still about, but these frequencies are now being used as part of the soon to be introduced digital TV transmission. Best check that they are UHF, The VHF type have actually been illegal for a number of years Hope this info has helped you understand your problem. I am happy to answer any questions you may have. Cheers

regards
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Make sure the microphone and the receiver are still broadcasting/receiving on the same channel.
Check that all of the appropriate connections are right from the receiver to the mixing board are connected as well.
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See the following for repairs:
http://shure.custhelp.com/app/answers/detail/a_id/4053

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