Ofcom made their decision

lustyd

Well-known member
Joined
27 Jul 2010
Messages
12,513
Visit site
Anyone care to read an explain what the latest comms from Ofcom mean? It's in relation to the baffling radiation email of March, apparently it's all now finalised. I can't be arsed to decypher this one and the links didn't work anyway, but I'd quite like to be compliant so hopefully someone here has read and understood
 

Buck Turgidson

Well-known member
Joined
10 Apr 2012
Messages
3,464
Location
Zürich
Visit site
lol!
Just tried it myself.
The calculator works but the compliance flow chart doesn't.
As far as I can work out my fixed VHF antenna needs to be 1.6m away from anyone when transmitting at 25w power continuously.

A 2w hand held appears to need .4m which is tricky ????
 

Praxinoscope

Well-known member
Joined
12 Mar 2018
Messages
5,789
Location
Aberaeron
Visit site
Anyone care to read an explain what the latest comms from Ofcom mean? It's in relation to the baffling radiation email of March, apparently it's all now finalised. I can't be arsed to decypher this one and the links didn't work anyway, but I'd quite like to be compliant so hopefully someone here has read and understood

Glad I'm not the only one so just doesn't understand the waffle.
 

mattonthesea

Well-known member
Joined
28 Nov 2009
Messages
1,400
Location
Bristol
ayearatsea.co.uk
As far as I can see we have to document that we keep the mast aerial away from anyone. As you say the handheld is trickier; perhaps document that it is always held at arm's length and ignore your document!
 

JumbleDuck

Well-known member
Joined
8 Aug 2013
Messages
24,167
Location
SW Scotland
Visit site
Since both my VHF nor my AIS have an average broadcast power in mW, I only have to note this with my licence.

k5Cas6M.png
 

lustyd

Well-known member
Joined
27 Jul 2010
Messages
12,513
Visit site
Glad I'm not the only one so just doesn't understand the waffle.
After the last time I didn't even try - there are smarter people on here than me who will explain it for us normal people :)
As far as I can see we have to document that we keep the mast aerial away from anyone. As you say the handheld is trickier; perhaps document that it is always held at arm's length and ignore your document!
Hmmm sounds like pushpit antenas might be troublesome though?
 

goeasy123

Active member
Joined
10 Nov 2018
Messages
756
Visit site
The germane part of the ruling is not that your emissions must be of a certain state, but that you calculate it a keep a record with your license.

We pay people to make up this load of salty old 'emissions'!!
 
  • Like
Reactions: Ink

PetiteFleur

Well-known member
Joined
29 Feb 2008
Messages
5,121
Location
Suffolk
Visit site
I tried to understand it but no idea what they are talking about - links didn't work, even went to Ofcom website but no wiser. My fixed vhf currently uses the aerial on a post at the stern as the masthead one fell off a couple of years ago and I don't climb the mast nowadays - just have to wait for a younger person to help me out. Who is going to check all this stuff anyway? Both my fixed and h/h vhf are only 3 years old so presumably are compliant?
 

Never Grumble

Well-known member
Joined
29 Sep 2019
Messages
946
Location
England
Visit site
lol!
Just tried it myself.
The calculator works but the compliance flow chart doesn't.
As far as I can work out my fixed VHF antenna needs to be 1.6m away from anyone when transmitting at 25w power continuously.

A 2w hand held appears to need .4m which is tricky ????
You don't have to worry about the handheld? do you? as far as I see with most having maximum power of 5W it sits beneath the 10W EIRP or 6.1W ERP

Mind I dont understand what the 5W max power equates to in EIRP or ERP.

And then cycling ... not as in bicycles ... now if I have a pushpit AIS aerial it only transmits once every 30 seconds at a power of 5W can I ignore as it falls under the threshold too?
 

Never Grumble

Well-known member
Joined
29 Sep 2019
Messages
946
Location
England
Visit site
Yup. They are only concerned with average power.
So if I use my VHF once every few weeks or months it should be fine. I really ought to do a radio check at least.

Yeah seemingly you have to measure it:

ERP & EIRP Calculator – M0UKD – Amateur Radio Blog

Personally, I'd rather pay a fine than buy kit and spend half a day measuring my output.

Unless there's a rule of thumb, but I CBA to find out.
I looked at that link ... antenna gain ... how does the average sailor measure that then?
 
Top