Ham radio Interference

"Dave H" wrote in message
...

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)

Class A licensee using at least some of the HF (shortwave bands)
+ 70cm (UHF) + 2m (VHF) or possibly 4m (low VHF).
A full house really.

Keep a diary of all the instances of interference for a week or so
and pay him a visit, and compare your log with his (he is required
to keep one).
You will soon see which bands and modes are causing the problem.
If he is a real Amateur in the true spirit of the hobby he will take
this as a challenge to try and get this resolved and gain experience
from it. This should be just as important to him as speaking into
the microphone or tapping his Morse key.

Conditions of use
Purpose
1. (1) The Licensee shall use the station for the purpose of self
training in communication by wireless telegraphy, which use
(without limiting the generality of the foregoing) includes technical
investigations.

Approach him in a non-confrontational way (as I am sure you will)
And he will be the best person to solve your problems.

--
Graham.

%Profound_observation%

Dave H wrote:


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)

Yes, the former two sound very much like the two types of antenna I
assumed for the purposes of the calculations. The real clincher is the
power levels; there are licensable limits, generally 400W output
power, but it isn't unknown for Amateurs to run higher power against
the terms of their licence. The subject is mentioned on ukra
frequently, and components for an amplifier of 4.5 kW input power (not
the output power, as that depends on the design) were offered for sale
on the group in the last few days.

It is not illegal to buy or own one of these (commercially made ones
are readily available) or to use it provided the power is limited to
the licensed level; and there are sound technical reasons why
under-running such an amplifier is undertaken.

If this chap is running power levels over the licensed limit, it would
need an official investigation to uncover that. I fear your only
courses are to press the case for 'interference' to broadcast
services (which AFAIIA doesn't include AM broadcasting), or obtain the
services of someone who can accurately measure field strengths using
specialist equipment - others will have to comment on this.

--

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

Dave H wrote:

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?

Leaflets published by the RSGB.
http://www.rsgb.org/emc/leaflets.php

This one looks like relevant
http://www.rsgb.org/emc/pdfs/leaflets/emc10avoid.pdf

I wonder how 'hot' his RF earth is?

--
Adrian C

Graham. wrote:

Keep a diary of all the instances of interference for a week or so
and pay him a visit, and compare your log with his (he is required
to keep one).

While many Amateurs do keep logs, it is not now a general requirement.

OFCOM can force him to to this, in cases of investigatable
interference, for example.

--

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

In article , Spike
scribeth thus

Dave H wrote:


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)

Yes, the former two sound very much like the two types of antenna I
assumed for the purposes of the calculations. The real clincher is the
power levels; there are licensable limits, generally 400W output
power, but it isn't unknown for Amateurs to run higher power against
the terms of their licence. The subject is mentioned on ukra
frequently, and components for an amplifier of 4.5 kW input power (not
the output power, as that depends on the design) were offered for sale
on the group in the last few days.

It is not illegal to buy or own one of these (commercially made ones
are readily available) or to use it provided the power is limited to
the licensed level; and there are sound technical reasons why
under-running such an amplifier is undertaken.

If this chap is running power levels over the licensed limit, it would
need an official investigation to uncover that. I fear your only
courses are to press the case for 'interference' to broadcast
services (which AFAIIA doesn't include AM broadcasting), or obtain the
services of someone who can accurately measure field strengths using
specialist equipment - others will have to comment on this.


So 400 watts assumed the RF output power, can then go into a beam with
say 10 dB gain, prolly more than that, so that could be in the 4 kW
region!..

Even 13 dB gain would make that 8 kW..

Serious amount of ERP;!.....
--
Tony Sayer

"Graham." wrote in message
...


"Dave H" wrote in message
...

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?


Keep a diary of all the instances of interference for a week or so
and pay him a visit, and compare your log with his (he is required
to keep one).
You will soon see which bands and modes are causing the problem.
If he is a real Amateur in the true spirit of the hobby he will take
this as a challenge to try and get this resolved and gain experience
from it. This should be just as important to him as speaking into
the microphone or tapping his Morse key.


Approach him in a non-confrontational way (as I am sure you will)
And he will be the best person to solve your problems.

--
Graham.

%Profound_observation%


Various bits and pieces snipped for brevity

There is NO Legal requirement to keep a log nowadays

UNLESS you are Instructed to keep one by the authorities

DieSea

"Dave H" wrote in message
...

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)


Yes they should help him make many distant contacts

Steve Tery

On Tue, 3 Mar 2009 02:14:49 -0000, Bill Wright
wrote:

illegal full-stop.

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

You can be done for not having your wheelie bin lid closed apparently.
I believe the maximum is 6 months in clink and/or a £2500 fine.
Real criminals get away with much less of course.

On Mar 1, 3:11*pm, Mota wrote:
On Wed, 25 Feb 2009 16:18:44 +0000, Dave H
wrote:





I have a Ham Radio enthusiast living some 200 yards away with a big set
of aerianalia. When he turns this in my direction and talks to his
contact, my picture on Sky jumps all over the place to the extent it is
unwatchable. Just like having the vertical hold set wrong. The sound on
my amplifier also cuts out when he is talking. Sky box is connected to a
video recorder by scart and then to the TV, in the next room, by RF
output (they don't make scart leads long enough).

(Turned on the electric keyboard the other day and there he was in
glorious SSB blasting out from the speakers)

I am also getting some mild noise-type interference on other occasions
but cannot be sure it is the same source.

Have been round to see him, nice chap, but he doesn't think he is doing
anything wrong and is not obliged to solve my problem. He has mentioned
some bit of equipment I could put in the 'line',even had a root around
his garage to see if he had one.

Does anyone know the legal position on this type of interference?

If I can't resolve it with him, to what body do I complain? Radio
Society of Great Britain? Ofcom?

Any advice would be welcome on the above or how I can minimise the
interference with a gadget.

David

Cross posted to uk.radio.amateur.- Hide quoted text -

- Show quoted text -

I have the same issue with a guy living next door to me. When he's on
his HAM radio he comes through the speakers on my stereo, makes the TV
unwatchable and cuts off my broadband connection. I contacted the
RSGB (Kath Wilson) and was basically told that I was the one who had
all this faulty equipment and would need to purchase filters to try
and correct the issue. The guy causing the interference told me I
should have my house rewired! For some reason, I was suddenly the one
who was at fault ?? An innocent guy can't watch his own television or
go on the internet and it's my fault - I ain't causing the
interefence!

It was obvious that the RSGB look after 'their own' and feel free to
go about the country interfereing with everybody's equipment and
couldn't care less - if you ask me their should be more policing of
this kind of selfish behaviour.

As it turned out, there are certain 'products' you can buy on ebay
which will Jam the transmissions from a ham radio which I am finding
very effective to this date ;-)

wrote in message
...
On Mar 1, 3:11 pm, Mota wrote:
On Wed, 25 Feb 2009 16:18:44 +0000, Dave H
wrote:
I have a Ham Radio enthusiast living some 200 yards away with a big set
of aerianalia. When he turns this in my direction and talks to his
contact, my picture on Sky jumps all over the place to the extent it is
unwatchable. Just like having the vertical hold set wrong. The sound on
my amplifier also cuts out when he is talking. Sky box is connected to a
video recorder by scart and then to the TV, in the next room, by RF
output (they don't make scart leads long enough).
I am also getting some mild noise-type interference on other occasions
but cannot be sure it is the same source.
Have been round to see him, nice chap, but he doesn't think he is doing
anything wrong and is not obliged to solve my problem. He has mentioned
some bit of equipment I could put in the 'line',even had a root around
his garage to see if he had one.
Does anyone know the legal position on this type of interference?
If I can't resolve it with him, to what body do I complain? Radio
Society of Great Britain? Ofcom?

Whereas traditionally your Ham friend would have been in the right,
insofar as electronic equipment that is not designed to receive radio
signals was definitely at fault when it did so respond, you may find
a solution by complaining to your local council about EM pollution
and public nuisance.

Many Radio Hams transmit with powers of several hundred watts when
a power of 10 watts or less is more than sufficient to achieve world-wide
coverage, especially if Morse Code or PSK31 is used.

The former RSGB is now known as the RSCB, The Radio Society for
Citizen's Band, and is next to useless as a technical or regulatory
authority.