Re: Legal aspects of the broadcast power
Sulaiman, Wed Jun 13 2018, 09:50PM

Everywhere on earth has some restrictions on broadcasting.
There are Industrial Scientific and Medical bands

Other than that and CB etc. you need a license.
Here in UK 1.81 to 2.00 MHz is the 160m amateur band,
so with my license, I can transmit up to 50W,
if you try without a license ... we will find you :)

Re: Legal aspects of the broadcast power
Plasma, Sun Jun 17 2018, 08:14AM

Thanks sulaiman, it gives me a ballpark to work to. The prototype is about 200mW and when mouser gets the parts in July I should be able to get it built.

Re: Legal aspects of the broadcast power
Sulaiman, Sun Jun 17 2018, 02:14PM

I am preparing to launch a hydrogen-filled balloon with a thin stainless steel wire as a vertical antenna ... weeks to months away,

200mW @ 1.8 MHz can travel a surprisingly long way.

Although likely to fail,
if you tell me when you are experimenting I could attempt to detect the emissions ?

Re: Legal aspects of the broadcast power
Plasma, Sun Jun 17 2018, 06:12PM

I live in nz not sure we're you live. The 11 July the tank inductor turns up, probably end of July, it will be binary am modulation.

Re: Legal aspects of the broadcast power
Sulaiman, Sun Jun 17 2018, 07:31PM

I am at your antipode - England :)

maybe my receiving your 200 mW a.m. transmission is a little optimistic.

Re: Legal aspects of the broadcast power
2Spoons, Sun Jun 17 2018, 09:39PM




They will hunt you down if you don't comply with the regs. 100W is quite a bit - even though you think a channel is unused someone/something could be listening. The RSM website has links to all the relevant standards that apply in NZ. So there are no excuses. Call them if you need information - I'm sure they'd be happier to let you know what you can or cannot do, than to find you and haul your sorry arse through the courts.

(edited so the links to the RSM work)

Re: Legal aspects of the broadcast power
Plasma, Mon Jun 18 2018, 12:37AM

Thanks 2spoons that is what I was looking for, 1.981mhz is general for maritime use, all over the country, but will spend some time in finding a good frequency of 😃

Re: Legal aspects of the broadcast power
2Spoons, Mon Jun 18 2018, 03:55AM

What are you trying to do? Can you use one of the ISM bands? eg 13.56MHz, Or the sub harmonic at 6.78MHz?

Re: Legal aspects of the broadcast power
Plasma, Mon Jun 18 2018, 05:21AM

The frequency are getting a bit high, I would need 200*3pf and 3uH,not to mention any side effects, the transistor can handle it though, just a bit my level

Re: Legal aspects of the broadcast power
Sulaiman, Fri Jun 22 2018, 08:35AM

Can you operate the equipment in a faraday shield ?
A metal-skinned building etc.

You would not be prosecuted if your intention is to avoid broadcasting power / causing interference.
you may be shut down
IF your shielding is inadequate AND you are located ;)

IF your intention is to broadcast power then get a license.

P.S. Tthere are many more monitors than broadcasters,
so the absence of signals does not mean that no one is listening.

Re: Legal aspects of the broadcast power
Plasma, Sat Jun 30 2018, 11:42AM

There is Al mesh for screen doors I could use, I'm just testing the things at the moment, it will be 1.56mhz so I can notice it on a pixy radio, we're it goes from there, there is a lot to do.
I think the shielding option is the best way.