Re: [IRCA] Part 15: an explanation (and loopholes?)

["Joe Miller, AB8YP" <ab8yp@xxxxxxxxx>]

Mr. Taylor,

I agree with you. It's my understanding though that
the 100 mw is measured at a distance of 30 meters from
the antenna. Depending on the loss of signal strength,
output power at the antenna can be compensated.

On a side note, I know of a ham operator within
200-400 miles of me who took an old CB radio,
converted it to transmit on ten meters, and uses it
for a CW beacon with one watt of power. How far does
the signal go? I heard it from my home....

73 de Joe (AB8YP)


--- Charles A Taylor <MWDXer@xxxxxxx> wrote:

> At 03:18 AM 7/19/2007 -0400, you wrote:
> >If it's Part 15, it's limited to 100MW ERP from
> each transmitter into a 3
> >meter antenna.. otherwise it isn't legal.
> 
> 
> Paul,
> 
> What Part 15 says is that the D-C input into the
> final shall not exceed
> 100 mW*, not 100 mW ERP. Also, the total length of
> the antenna, feedline
> and ground connection shall not exceed 3 meters.
> 
> * You mean mW=milliwatts. MW=megawatts!
> 
> Effectively, that means the final is going to be
> VERY close to the
> antenna. Reading the "letter of the law," I see no
> averse language
> that prohibits a complete radial system. THAT would
> make a BIG
> difference in a 100 mW's reach/coverage.
> 
> Also, since the D-C input is fixed at 100 mW, I see
> no averse
> language that limits the R-F input to the final to
> any level.
> That means, for example, if one uses a grounded-grid
> or grounded-base
> final, if driver feeds 50 mW into the final it will
> also appear in the
> output for a total of 150 mW!
> 
> It looks legal to me.
> 
> Our barn has a galvanized roof and years ago I took
> the time and trouble
> to bond the sheets together.I also put up a 10-foot
> mast atop the center
> of the roof.
> But I never carried through and put a 100-mW
> transmitter up there. I
> may go berzerk and put the mast back up and try a
> small BC station or
> beacon.
> 
> 
> >Meaning, they can synch more then one transmitter
> together as long as none
> >of the individual transmitters exceed 100MW ERP
> with a 3 meter antenna
> 
> Got that right!
> 
> Charles
> 
>    Charles A Taylor, WD4INP
> 
>   Greenville, North Carolina 
> 
> 
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