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Mikeday408
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Joined: 20 March 2010
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| Posted: 20 March 2010 at 7:03pm | IP Logged
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Hi im wanting to run a 6watt FM transmitter from my house in the country. yes i know the legal output power is 500mw ,but im wondering if it doesn't cause any interference will someone still complain about it or wouldn't they know i was transmitting over the legal limit?
Im looking at broadcasting during the weekends and on the odd occasion during the week. does anyone know if i need a licence to broadcast 6W on 87.9 or 87.8mhz?
thanks in advance ,
Mike
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RadioTech
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| Posted: 03 April 2010 at 7:55pm | IP Logged
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Hi Mike,
Technically the answer is YES.
Example: If you run 6 watts into a folded dipole (which has a gain of around 1.76dBi) you'll be effectively radiating around 8 watts (taking into account losses in your coax).
For that kind of power, RSM would like to sell you a licence!
In practical terms, if you are miles in the middle of nowhere, and don't interfere with any other services, or cause problems with land mobile repeaters, people's TV reception and the like, then chances are you won't get visited by the radio inspectors.
Note: I am not condoning you operate any transmitter into an aerial with this kind of power. All I am saying is if you do, these are the possible outcomes.
Next up - 87.9 and 87.8 are NOT currently used for LPFM.
I suggest you don't use them - or you might well get a knock on the door.
Find a spare frequency from 88.1 through to 88.7 - and not 88.4, 88.5, 88.6 or 88.7 if you live within 120 kn of the Skytower in Auckland.
Edited by Radio123 on 03 April 2010 at 7:58pm
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Mikeday408
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| Posted: 11 April 2010 at 11:34pm | IP Logged
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ok that has cleared up some things so basically if you don't cause an interference you wont get annoyed by the radio inspectors? it will have a low pass filter on the end of it as well so that should help.
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RadioTech
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| Posted: 17 April 2010 at 2:57am | IP Logged
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Yes and no.
Not causing interference is always a good idea, but it is no guarantee you won't get a knock on the door.
I would hope you don't run any transmitter without a LPF.
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New Zealand Low Power FM Radio Broadcasting Forums : LPFM Broadcast Laws in New Zealand
Topic: 6W fm transmitter
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