Re: [amsat-bb] HF interference from BPL or PLC

[Jon Ogden <na9d-2@xxxxxxxxxxxxx>]

I'm still wondering about this question.  Yes, the data on the power lines
will generate an electric field.  This electric field could cause
interference for sure.  But what is the p-p voltage of that data?  If it's
something small like 5 to 10 v, then I doubt the field strength would be
very large and the area affected due to radiation of the signal would likely
be pretty small.  I would imagine it would be smaller than the EM field
generated by the power line itself.

OTOH, if the p-p voltage of the data is very large, then indeed, I think we
could have some major problems.  But fortunately, we aren't the only tenants
on HF.  Ships, planes, military, gov't all still use HF.

73,

Jon
NA9D

on 5/14/03 9:53 AM, Jim Sanford wrote:

> I agree, it's probably a disaster for us.  Which doesn't matter to
> regulators.  The point we'll have to make is that the throughput and
> reliability will be at risk due to all the noise and variation of
> impedances on the power network, let alone interference FROM licensed HF
> users.  Any ISP considering this is probably in for more user complaints
> than a cable TV company of the mid 80's...
> 
> To get just a HINT of the problem, ask anyone who was involved in cable
> current AM broadcasting.  It could be made to work, but was painful and
> full of noise problems.

-------------------------------------
Jon Ogden
NA9D (ex: KE9NA)

Citizen of the People's Democratic Republik of Illinois

Life Member: ARRL, NRA
Member:  AMSAT, DXCC

http://www.qsl.net/na9d   <- Updated on 1/22/03!!!

"A life lived in fear is a life half lived."


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