[aprssig] aprssig Digest, Vol 140, Issue 6

Nick G4IRX g4irx9 at nowindows.net
Sun Feb 14 15:12:51 EST 2016

On 13/02/2016 18:27, Dave B via aprssig wrote:
> On 13/02/16 18:00, aprssig-request at tapr.org wrote:
>> Could someone help me with some information I need for a project I am 
>> working on?
>> FIRST TWO QUESTIONS: What is the maximum power allowed for APRS 
>> operation in these specific countries?  Is this calculated as RF 
>> output or EIRP?
>> This is an academic question only.  I am quite aware of the need to 
>> not create "alligator" stations with big mouths and little ears.
>> SECOND QUESTION: Could you brief me on the regulations in regard to 
>> establishing a "24/7/365 digipeater" in these *specific* lands?
>> Cheers,
>> Ev, W2EV
> As far as the UK goes...
> Not sure about the "Maximum" power, but 100W for FM or 400W PEP for 
> SSB are our usual limits.   Anything over 50W is seen as antisocial 
> for APRS, unless actually "Mobile"...
> 24/7/365 (unattended) operation as a digi or gateway, needs a Notice 
> of Variation (NoV) from Ofcom (our regulator) and to get that needs 
> other people signed up as key-holders to gain access to shut things 
> down if needed, within 30 mins of receiving a phone call from the 
> regulator.   Yes, even on 2m, were we are the "Primary" user... If 
> that happens, then only a license holder is permitted to re-activate 
> the station.
> It is that main reason why APRS is dying in the UK. Inappropriate 
> overblown regulations.
> In theory, we need a NoV for a RX only iGate!  As that is seen as an 
> interconnection between the "Amateur" network and the "Internet".
> I'm sure others will chime in too.

I'll just add to Dave's notes the 12.5kHz channelling requirement in the 
UK imposed as part of your Notice of Variation, as well as power limit, 
EIRP limit and antenna height which are all taken into account when you 
apply for your NOV.

Nick G4IRX

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