Re: CLEAR Net Tempest

There isnt really a 'correct' way to calculate loss, the loss in the cable and connectors varies according to the frequency. For example on the VHF tv band the rough rule of thumb was 1db per connector and 1db per metre in RG-6 Cable. I once calculated that with my 5W Amateur VHF transmitter running into 14m of Coax before the antenna I was only getting about 2.5W of actual RF at the Antenna - and that didnt count the two adaptors and any loss in the antenna itself... Mark. (aka ZL1VMF) At 21:07 13/08/2001 +1200, Craig Whitmore wrote:

I think I found the rules....

http://www.med.govt.nz/rsm/publications/equip_specs/rfs29.pdf

Unless there is a newer one..(which I could not find) With the 2.4 "public freq" the Maximum allowed is 1W Anyone know the proper way to figure out how much you are transmitting.. Something to do with:

A= X mw from Cards B= db of Antenna C= Loss of Cable/M * Number of Metres D= Loss per connector * Number Connector

Thanks Craig Whitmore Orcon Internet

----- Original Message ----- From: "Craig Whitmore" To: "Juha Saarinen" ; "'Simon Blake'" ; Sent: Monday, August 13, 2001 7:46 PM Subject: Re: CLEAR Net Tempest

...

This is the problem with "Public" Frequencies. As long as your not over the Maximum Wattage (there is no way of really telling unless you have some fancy equipment (But you can guess if you know the right formulas etc) there is nothing your neighbors can do against you about your interference.

...

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