Ofcom EMF consultation

[HDAV]

Well i didn’t get the email

But the consultation on the ICNIRP Guidelines doesn’t seem complicated

[telecast]

Originally Posted by HDAV

Well i didn’t get the email



But the consultation on the ICNIRP Guidelines doesn’t seem complicated

Well that’s easy for you to say. You did not get the email.

Those of us who did were very confused until PD so eloquently translated it for us

[Old seahorse]

I think it’s all about being too close to radiation, as it may fry your brain. Unfortunately, this advice came to late for me.
My advice would be not to poke the radio antenna in your ear, until further clarification arrives!

[Maximus]

Originally Posted by willk

I shall add that to my List of Things to Ignore.

The first post was enough for me!

That thing is somthing else to ignore too....or at least the Doom Mongers eh!
Done and dusted ..move on...Life is too short..
"Frosty" is on it!

Afterall ..the Sunny uplands await

[CUSAC]

https://www.rya.org.uk/newsevents/ne...ic-fields.aspx

The RYA have attempted to translate the “communication”.

[Pikey Dave]

Originally Posted by CUSAC

https://www.rya.org.uk/newsevents/ne...ic-fields.aspx

The RYA have attempted to translate the “communication”.

So that confirms it, one for the floor mounted round filing cabinet.

[lakelandterrier]

Well that's a lot clearer. Good old RYA.

I like the idea of keeping a copy of the manufacturer's fitting instructions on board a RIB - no idea where mine are

I think on the calculator I need to have min 1.6m from antenna a base to nearest person of 1.6m. That is if my operating freq. is actually 156MHz - the icom manual isn't clear. The calculator spreadsheet's not exactly written in plain English either.

I no idea what EIRP is compared to ERP - all my manual says is the output is 25W - no ERP /EIRP info

I doubt the top of my A-Frame - highest & aft most part of the boat is more than 1.6m from my aft most jockey seat.

Does this mean my boat is now illegal, or in the interests of compliance I have to remove my fixed VHF - a vital bit of safety equipment -or can ONLY use it in emergency)?

how are normal people without degrees in electronic engineering or whatever meant to understand this? - I failed physics O level with a D

Oh, and why is the RYA incapable of spelling licence (noun) properly

[Maximus]

Originally Posted by lakelandterrier

Well that's a lot clearer. Good old RYA.

I like the idea of keeping a copy of the manufacturer's fitting instructions on board a RIB - no idea where mine are

I think on the calculator I need to have min 1.6m from antenna a base to nearest person of 1.6m. That is if my operating freq. is actually 156MHz - the icom manual isn't clear. The calculator spreadsheet's not exactly written in plain English either.

I no idea what EIRP is compared to ERP - all my manual says is the output is 25W - no ERP /EIRP info

I doubt the top of my A-Frame - highest & aft most part of the boat is more than 1.6m from my aft most jockey seat.

Does this mean my boat is now illegal, or in the interests of compliance I have to remove my fixed VHF - a vital bit of safety equipment -or can ONLY use it in emergency)?

how are normal people without degrees in electronic engineering or whatever meant to understand this? - I failed physics O level with a D

Oh, and why is the RYA incapable of spelling licence (noun) properly

Good ol RYA

[gpsguru]

Originally Posted by Pikey Dave

Marine VHF fixed sets are 25W

Indeed, but the ERP (effective radiated power) at the antenna will be a calculation based on the loss of the coax (attenuation) and the gain ( above unity) of the antenna. Most RIB installations will use a quarter wave whip antenna which is unity gain, and RG58u coax which has a loss of about 0.23db/m at marine band frequencies.

[Pikey Dave]

Originally Posted by gpsguru

Indeed, but the ERP (effective radiated power) at the antenna will be a calculation based on the loss of the coax (attenuation) and the gain ( above unity) of the antenna. Most RIB installations will use a quarter wave whip antenna which is unity gain, and RG58u coax which has a loss of about 0.23db/m at marine band frequencies.

Just run that by me again in English [emoji6][emoji848]

[gpsguru]

Ok .... most rib installation will not be 25 ERP.

As an example, on my ribcraft the antenna is unity gain and it is fed with about 8m of RG 58u coax, so the cable loss is about 1.8db, therefore the erp of the antenna is not 25w, more like 15w (cant be arsed to do the calculation).

Also just to complicate matters further, the polar diagram of the antenna ( radiation pattern) will not be uniform.

TBH, I cant see ofcomm doing much on this as it would be an enforcement nightmare due to the technicalities involved.

It is not as simplistic as it looks.

[Pikey Dave]

Originally Posted by gpsguru

Ok .... most rib installation will not be 25 ERP.

As an example, on my ribcraft the antenna is unity gain and it is fed with about 8m of RG 58u coax, so the cable loss is about 1.8db, therefore the erp of the antenna is not 25w, more like 15w (cant be arsed to do the calculation).

Also just to complicate matters further, the polar diagram of the antenna ( radiation pattern) will not be uniform.

TBH, I cant see ofcomm doing much on this as it would be an enforcement nightmare due to the technicalities involved.

It is not as simplistic as it looks.

[emoji106] I think the general consensus is “do nowt”

[gpsguru]

Originally Posted by Pikey Dave

[emoji106] I think the general consensus is “do nowt”

Agreed.

The chances of enforcement action are little better than zero, I think it will be filed in ‘too difficult’ bin.

[lakelandterrier]

Originally Posted by Pikey Dave

[emoji106] I think the general consensus is “do nowt”

Yes, but I now where the "naughty" seat on the boat is

Any irritating / malcontented crew will be directed to the jockey closest to the antenna as I hail all and sundry

[GuyC]

I wonder if you can use it to keep your pasties warm?

[gpsguru]

Originally Posted by GuyC

I wonder if you can use it to keep your pasties warm?

Nah, nowhere near enough power.

I could post a picture of my thumb scar where I touched the wrong bit of a 10kw Transmitter 35 years ago, it blew a small hole in the end of my thumb which stopped at the nail. It smarted a bit (a lot) and made me jump ! 🙄😉

[lakelandterrier]

Originally Posted by GuyC

I wonder if you can use it to keep your pasties warm?

Is that a euphemism

[Pikey Dave]

Originally Posted by lakelandterrier

Is that a euphemism

He’d have to have a very short “antenna” [emoji6]

[lakelandterrier]

Originally Posted by Pikey Dave

He’d have to have a very short “antenna” [emoji6]

Maybe that's an effect if he if got his EMF calculation wrong through erroneous EIRB earth matrix triangulation, and infringed the ERP safe distance paradigm radius due to syntax error on the co-ax attenuation curve parabola and the inverted polar mapping synchronisation.

Then I may be wrong on this

[CUSAC]

Another own goal from Ofcom. Final decision email with two broken hyperlinks needing them to send a second communication.......