Ham radio Interference

"Ian Jackson" wrote in message
...
In message , Bill Wright
writes

"Ian Jackson" wrote in message
...
Personally, In 49 years, I've never put out more than 180W at HF, and
30W
at VHF. At the moment, I can only manage 70W and 15W.

Can't you get your mast to stand up properly?

And guy wires are impractical . . .

Bill

"Zaphod" wrote in message ...
Let's not turn this into a mast debate.

Ohhhh!

Bill

Steve Terry wrote:

Quite true, but what's in a word? Do their radio signals behave
differently from the other sort? Do they know they're "transmissions"
and not "broadcasts"?
Rod.


I don't know of any Broadcasters that transmit power as low as Radio Amateurs

If you had a typical Broadcast transmitter next door?
I suspect you would soon discover which of your domestic appliances have RF filtering


The vast majority of the UHF low powered television relays around the country
run 2 watts transmit power.

wrote in message
...
Steve Terry wrote:

Quite true, but what's in a word? Do their radio signals behave
differently from the other sort? Do they know they're "transmissions"
and not "broadcasts"?
Rod.


I don't know of any Broadcasters that transmit power as low as Radio
Amateurs

If you had a typical Broadcast transmitter next door?
I suspect you would soon discover which of your domestic appliances have
RF filtering


The vast majority of the UHF low powered television relays around the
country
run 2 watts transmit power.

Which is why they're called "low power" television relays! The main
transmitting stations, on the other hand, are generally hundreds of
kiloWatts up to 1 MegaWatt ERP.

Many of the main FM sites are also in the hundreds of kiloWatts ERP range.

Several years ago I was installing some satellite comms equipment into a
VSAT earth station at the Crown Castle site at Brookmans Park. Even though
the equipment was CE-marked, from a (supposedly) kosher British
manufacturer, and manufactured in Surrey (not under contract by a Taiwanese
sweat shop), the phone lines were unuseable due to breakthrough from the
co-sited 10kW TalkSport transmitter.

Opened it up to find the pads for the Ls and Cs on the line inputs were
shorted and unpopulated respectively.

Bought some ferrite toroids from the nearby RSGB shop. Problem solved.

Question - was the CE mark earned on hardware with the Ls and Cs fitted?

In message , Zaphod writes

wrote in message
...
Steve Terry wrote:

Quite true, but what's in a word? Do their radio signals behave
differently from the other sort? Do they know they're "transmissions"
and not "broadcasts"?
Rod.


I don't know of any Broadcasters that transmit power as low as Radio
Amateurs

If you had a typical Broadcast transmitter next door?
I suspect you would soon discover which of your domestic appliances have
RF filtering


The vast majority of the UHF low powered television relays around the
country
run 2 watts transmit power.

Which is why they're called "low power" television relays! The main
transmitting stations, on the other hand, are generally hundreds of
kiloWatts up to 1 MegaWatt ERP.

Many of the main FM sites are also in the hundreds of kiloWatts ERP range.

Several years ago I was installing some satellite comms equipment into a
VSAT earth station at the Crown Castle site at Brookmans Park. Even though
the equipment was CE-marked, from a (supposedly) kosher British
manufacturer, and manufactured in Surrey (not under contract by a Taiwanese
sweat shop), the phone lines were unuseable due to breakthrough from the
co-sited 10kW TalkSport transmitter.

Opened it up to find the pads for the Ls and Cs on the line inputs were
shorted and unpopulated respectively.

Bought some ferrite toroids from the nearby RSGB shop. Problem solved.

Question - was the CE mark earned on hardware with the Ls and Cs fitted?

Good old RSGB to the rescue!

The RSGB EMC Committee have fairly recently reported on this sort of
thing in RadCom - power supplies (I believe it was replacement /
build-it-yourself computer PSUs) where the hash filtering components had
been deliberately linked out or omitted as appropriate.

While this sort of thing is really happening, it reminds me of the old
rumour about how TV sets used to be built. They were first built
'properly', then all the components which were possibly 'optional' were
individually removed, first in turn, then a few at a time, until the TV
set stopped working properly, then only the really critical components
were replaced. In this way, the manufacturers were able to keep the
number of components used to the absolute minimum. I'm sure that it was
only partly untrue.
--
Ian

On Wednesday, 25 February 2009 16:51:49 UTC, Erica Nurney wrote:
On 25 Feb, 16:18, 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

What he is doing is definitely wrong (ie illegal) if it can be proven
that it is his equipment causing the interference. I work on building
electrical control panels for machinery and we have go though all
sorts of standards and regulations hoops and spend thousands of pounds
to ensure our equipment does not ruin people's TV reception, amongst
other things - it is part of the CE marking of electrical equipment.

He has a right to use his amateur radio equipment, just as much as you
have a right to have interference-free TV reception, it is best to
reach a compromise and possibly accept his offer of filters etc. If
he is buggering up your reception, it's a fair bet that your
neighbours might be suffering as well so he might be providing filters
to a lot of people.

The regulatory body used to be the Post Office, I guess OfCom might be
the first place to try nowadays.

Your first sentance needs to be altered ... (What he is doing is definitely wrong) (ie illegal)... It is not illegal to transmit a signal from home "providing you have a LICENCE" which he will have ... To obtain a licence radio amateurs have to study and take a test ... if your knowledge is not to the required standard you will fail ... The power limits in the UK is 400 watts ... some years ago amateurs had to also be able to send 12 words a minute morse code send and receive ... So this amateur has studied hard to get where he is today ... Regarding everyday equipment the amateur also suffers interference which they have to cope with ... When we buy equipment today make sure it has the approved standard of filtering and is not a poor import ...
Hope this helps ...
A friendly Radio Amateur ...

On 18/02/2017 10:23, wrote:
On Wednesday, 25 February 2009 16:51:49 UTC, Erica Nurney wrote:
On 25 Feb, 16:18, 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.

What he is doing is definitely wrong (ie illegal) if it can be proven
that it is his equipment causing the interference. I work on building
electrical control panels for machinery and we have go though all
sorts of standards and regulations hoops and spend thousands of pounds
to ensure our equipment does not ruin people's TV reception, amongst
other things - it is part of the CE marking of electrical equipment.

He has a right to use his amateur radio equipment, just as much as you
have a right to have interference-free TV reception, it is best to
reach a compromise and possibly accept his offer of filters etc. If
he is buggering up your reception, it's a fair bet that your
neighbours might be suffering as well so he might be providing filters
to a lot of people.

The regulatory body used to be the Post Office, I guess OfCom might be
the first place to try nowadays.

Your first sentance needs to be altered ... (What he is doing is definitely wrong) (ie illegal)... It is not illegal to transmit a signal from home "providing you have a LICENCE" which he will have ... To obtain a licence radio amateurs have to study and take a test ... if your knowledge is not to the required standard you will fail ... The power limits in the UK is 400 watts ... some years ago amateurs had to also be able to send 12 words a minute morse code send and receive ... So this amateur has studied hard to get where he is today ... Regarding everyday equipment the amateur also suffers interference which they have to cope with ... When we buy equipment today make sure it has the approved standard of filtering and is not a poor import ...
Hope this helps ...
A friendly Radio Amateur ...

If you stop him from using his equipment he'll probably kill himself. If
he hasn't died from old age already. (Check the date - another Google
Groups user ;-)

--
Max Demian

On Sat, 18 Feb 2017 10:48:21 +0000
Max Demian wrote:

On 18/02/2017 10:23, wrote:
On Wednesday, 25 February 2009 16:51:49 UTC, Erica Nurney wrote:
On 25 Feb, 16:18, Dave H wrote:

I have a Ham Radio enthusiast living some 200 yards away with a
snip


If you stop him from using his equipment he'll probably kill himself.
If he hasn't died from old age already. (Check the date - another
Google Groups user ;-)


I wonder if it was ever resolved.

--
Davey.

2009, well hopefully by now they have either sorted it or killed one
another.
Brian

--
----- -
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please!
wrote in message
...
On Wednesday, 25 February 2009 16:51:49 UTC, Erica Nurney wrote:
On 25 Feb, 16:18, 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

What he is doing is definitely wrong (ie illegal) if it can be proven
that it is his equipment causing the interference. I work on building
electrical control panels for machinery and we have go though all
sorts of standards and regulations hoops and spend thousands of pounds
to ensure our equipment does not ruin people's TV reception, amongst
other things - it is part of the CE marking of electrical equipment.

He has a right to use his amateur radio equipment, just as much as you
have a right to have interference-free TV reception, it is best to
reach a compromise and possibly accept his offer of filters etc. If
he is buggering up your reception, it's a fair bet that your
neighbours might be suffering as well so he might be providing filters
to a lot of people.

The regulatory body used to be the Post Office, I guess OfCom might be
the first place to try nowadays.

Your first sentance needs to be altered ... (What he is doing is definitely
wrong) (ie illegal)... It is not illegal to transmit a signal from home
"providing you have a LICENCE" which he will have ... To obtain a licence
radio amateurs have to study and take a test ... if your knowledge is not to
the required standard you will fail ... The power limits in the UK is 400
watts ... some years ago amateurs had to also be able to send 12 words a
minute morse code send and receive ... So this amateur has studied hard to
get where he is today ... Regarding everyday equipment the amateur also
suffers interference which they have to cope with ... When we buy equipment
today make sure it has the approved standard of filtering and is not a poor
import ...
Hope this helps ...
A friendly Radio Amateur ...

On 18/02/17 15:29, Graham. wrote:
He did qualify the statement you took umbrage at with the words "if it
can be proven that it is his equipment causing the interference."

Again ignoring the age of the thread, interference to Sky system by
amateur radio transmissions is almost certainly not the fault of the
amateur radio equipment. The frequency at which the amateur is likely
to be transmitting is so far removed from the frequencies used for the
satellite broadcasts and the directionality of satellite dishes
sufficiently great that any spurious signals, legitimately received, are
going to be of a negligible level. It is much more likely that the
satellite receiving system is responding to frequencies it is not
intended to receive, which is a fault in the satellite system.

TV interference was something that was associated with, particularly,
band I and band III analogue TVs, and was greatly reduced by the move to
UHF. Interference to cable systems is definitely the fault of the cable
system, and the corresponding is almost certainly the case for satellite
systems as well.

These days, the big problem is the other way round, unintentional
transmissions by things like power line internet, VDSL, solar energy
systems on the room, low energy lighting, etc. will almost certainly
raise the noise level, in the amateur bands, to an unacceptable level,
in all but the most rural areas. Ofcom is under-resourced to deal with
the faulty installations causing these problems, even though many
installations are non-compliant, and some products are illegally CE
marked. (Plasma TVs are also a big problem, but finally dying out.)

I'd also point out that there there are three different sets of power
limits for amateurs, each requiring a stricter examination. One of the
main areas of stress, in the examinations, is on interference.

Although there is the occasional bad egg, the best approach to dealing
with such interference is friendly contacts with the amateur, and a
willingness to approach the problem from your end. Unfortunately, in
today's blame culture, amateurs are unlikely to want to get involved in
making repairs improvements to your system, but should be able to give
guidance to the relevant professionals, and should be able to
demonstrate that their own systems are not affected.