Ham radio Interference

In article , Ian Jackson ianREMOVET
scribeth thus
In message , tony sayer
writes
In article , Ian Jackson ianREMOVET
scribeth thus
In message , tony sayer
writes
You are wrong to assume that the radio amateur will be 'kicking out lots
of watts of ERP'. He might be, but it's only a minority who do. On most
of the amateur bands the maximum power allowed (even for holders of the
Full Licence) is 400W at the aerial feedpoint.

This is 400 watts RF into the aerial feeder cable and what is or can be
hanging on the end of that?...

In most cases, its at the aerial end.

So thats power into the actual aerial then ?..

Assuming an SWR of 1:1, yes.



So 400 watts into a 10 dB gain Yagi on 2 Metres or 70 cms I make that an
ERP of say 4 kW then?..

Course if that was a 13 dB gain, twice that!..

Wouldn't like to have that pointing at my gaff;!...
--
Tony Sayer

If you want to fit your own filter http://www.garex.co.uk/AKD/akd.htm

Thanks for the reminder .. they do a rather useful 6 metre box)...

--
Tony Sayer

"Roderick Stewart" wrote in
message .myzen.co.uk...

The kit will have been designed to work in the sort of electromagnetic
environment that could reasonably be expected to prevail in the sort of
place it is intended to be used. In other words, it will have been
designed just like everybody else's. If the radio ham has a different
design brief, then he is the odd one out.

In the days when domestic electronic equipment was the TV, a radio,
and possibly a record player, and the telephone was an electromechanical
device not susceptible, the Radio Hams viewpoint held.

However times have changed.

The Radio Ham was a technical expert, but alas, no longer. 6-year-old
children who do not have the mathematical capability to even calculate
resistances in parallel and who most certainly did not even have to
demonstrate an understanding of the difference between a conductor
and an insulator are being handed out beginner's licences. Older
people (who mystifyingly are photographed grinning inanely when
they have achieved the acadaemic standing of a 6 year old) also get
these licences and breach their licence conditions by transmitting
on much higher powers.

The RSCB is aware of these transgressions, but turns a blind eye,
in particular a director of the RSCB who frequents this NG and who
tries to gain kudos by promoting that beginner's licence refuses to
discuss the situation despite challenged repeatedly in this NG.

The use of a high power radio transmitter in a domestic environment
by someone who does not understand the difference between a conductor
and an insulator is a recipe for disaster, and I am sure that those parents
who object to the placing of mobile phone masts in school playgrounds
might have something to say about this.

The RSCB used to be a respected authority, but now that it is turning a
blind
eye, the RSCB is no longer to be trusted as the guardian of Ham Radio. An
RSCB representative has recently mooted the use of ASBOs to control the
anti-social operation of radio equipment, and it is inevitable that this
will
develop.

"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?

Bill

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?

Not at my age....
--
Ian

"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?

Not at my age....

Let's not turn this into a mast debate.

In message , Zaphod writes
Let's not turn this into a mast debate.

Most of the hams I've met are accomplished mast debaters.



--
Clint Sharp

Let's not turn this into a mast debate.


it's nice to wake up in a tent every morning .......

"Roderick Stewart" wrote in
message .myzen.co.uk...
In article , Jim wrote:
Radio amateurs DO NOT broadcast.

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

Steve Terry

"tony sayer" wrote in message
...
If you want to fit your own filter http://www.garex.co.uk/AKD/akd.htm

Thanks for the reminder .. they do a rather useful 6 metre box)...
Tony Sayer


AKD! at least they are British, but you'd be better off with a modded PMR

Steve Terry