Ham radio Interference

tony sayer wrote:
In article , Johnny B Good
scribeth thus
The message
from "Bill Wright" contains these words:

"Len GM0ONX" wrote in message
...
Jeff wrote:
The truth is harsh but Jeff is right. Its almost certain that your
equipment is at fault. OFCOM can help with the TV by fitting high pass
filters but you may be on your own with the electric keyboard as it
should
designed not to pick up radio signals.
Hams will always take this view. I dare they are 90% right. But in my
experience anyone living in the sort of field strength generated by 100s of
Watts multipled by the gain of a long beam is inevitably going to have
problems. Every piece of electonic equipment they buy might suffer
interference, and how can Joe Bloggs be expected to fit caps across all the
transistor junctions in his new bit of kit?
I think it's time that the law was changed. When the present regulations
were made home electronics amounted to much less than they do now. It is
just plain antisocial to generate that sort of field strength if you
live on
in high density housing area. Anyone wanting to pursue their hobby
with that
sort of power should move house, to somewhere where there are no
neighbours.
The law should be altered so that no amateur can put more than a certain
field strength into any residential property except his own.
I'll leave it to others to point out why just about everything you've
just said here is so wrong. ;-)


Don't think its -wrong- as such, times have changed and Its not that
socially acceptable these days to be radiating what can be Kilowatts in
a built up area and seeing that some housing estates are like rabbit
warrens ...

Ofcom might well have something to say if you proposed to site a
Broadcast TX in the same location for instance;!...

For those of you who are interested, the Health Protection Agency has a
web page showing the field strength limits for the amateur bands.
Between 10 MHz and 150 MHz, this is 28 volts per metre.

Link:
http://www.hpa.org.uk/webw/HPAweb&HP...=1158934607693

Phil

tony sayer wrote:

I merely crunched some numbers to show what was possible, and that
exercise showed that the equipment necessary easily fell within the
bounds of availability.

4 kW -into- the aerial.. as much as that?...

Unless there's an error somewhere, that's what the numbers said.

Anyone is quite free to calculate their own.

--

from
Aero Spike
Not a member of the RSGB for 50 years 1959 - 2009

In article , Spike
scribeth thus

tony sayer wrote:

I merely crunched some numbers to show what was possible, and that
exercise showed that the equipment necessary easily fell within the
bounds of availability.

4 kW -into- the aerial.. as much as that?...

Unless there's an error somewhere, that's what the numbers said.

Anyone is quite free to calculate their own.


So thats the actual -RF- power from the TX and not the DC input power?..
--
Tony Sayer

For those of you who are interested, the Health Protection Agency has a
web page showing the field strength limits for the amateur bands. Between
10 MHz and 150 MHz, this is 28 volts per metre.

Link:
http://www.hpa.org.uk/webw/HPAweb&HP...=1158934607693

This is guidance, not limits, but interesting non the less. I haven't seen
this before.

--
Graham.

%Profound_observation%

"Graham." wrote in message
...

illegal full-stop.

Good grief! Have they started passing laws about punctuation now? Damn
this nanny state!

At least it doesn't involve menstruation.

When I was at school, when we did wood & metal-work
the girls went off and did something called commerce.

I always wondered if they learned about full-stops and apostrophes
at the same time.

--
Graham.

%Profound_observation%

But if John Thick - the average member of the British public

You must have a good opinion of yourself if you think that everyone else
is thick.

Bill

True, not everyone can be included in the average, besides, you've
got to allow for those who are thicker than John Thick,
Messrs. Twoshortplanks and Pig**** for starters.

--
Graham.

%Profound_observation%

"Roderick Stewart" wrote in
message .myzen.co.uk...
In article , Iain Young wrote:
"Legally" the Amateur Radio Enthusiast may be correct that it's the
user's equipment problem. IMHO, that doesn't mean he cant/wont/shouldn't
work with the OP to resolve the situation to the satisfaction of both
parties.

Yes, legally he may be in the right, and may be able to produce
measurements that prove it (to those who understand them) but the huge
recent proliferation of electronic gadgets of all sorts means that we're
living in a different world from the one in which the relevant laws were
drafted. Whatever the quality of the electronic gadgets, they're owned by
many more people than the ones who possess transmitters, and we still live
in a democracy where the wishes of the majority are supposed to prevail. A
test case could change everything.

I'm not sure I agree with you Rod.
The situation today is better IMHO than through the 1950s, 60s and 70s
because of the susceptibility of the VHF TVs of the time, and, to tell
the truth, sometimes it was the amateurs' spurii that was to blame.
When people migrated their BBC1 and ITV viewing to UHF in
the 70s (long before 405 closedown in the vast number of cases)
TVI became much less of a problem and, sets have become
more immune as the years have passed.
What are these recent gadgets that now proliferate and are
causing more complaints than we had with VHF TVI?

What is certain is the reverse is true, by which I
mean all the interference from SM PSUs in PCs and
other domestic gear is making reception of weak amateur
signals all but impossible, but we can't complain of course!


--
Graham.

%Profound_observation%

The real issue is what the particular Amateur's set-up is, not what
other Amateurs might or might not use.


He has three long horizontal poles forming one aerial and three very
long UHF-type aerials and what looks like a very large vhf aerial. Any help?


David (the OP)

Jeff wrote:

Regarding the case in point, the distance quoted way 200 Yards! Hardly a
near neighbour, or high density housing!.


I have to confess to an error of judgement. My colleague is more like 80
yards away. I have HT cables running 30 yards distant, but they don't
interfere with the tellies - I know because I don't hear them speaking,
except in foggy weather when they fizz like hell!

David

"Dave H" wrote in message
...
Jeff wrote:

Regarding the case in point, the distance quoted way 200 Yards! Hardly a
near neighbour, or high density housing!.
I have to confess to an error of judgement. My colleague is more like 80
yards away. I have HT cables running 30 yards distant, but they don't
interfere with the tellies - I know because I don't hear them speaking,
except in foggy weather when they fizz like hell!

David

But are there other houses as well??

Jeff