How do profesional riggers "point" an aerial.

In article , soup
says...

From here it is 226 degrees to the transmitter, if (when) I get the
"profesionals" in will they point the aerial at 226 using a compass
or do they have some sort of meter that measures maximum signal
and they wiggle the aerial (after roughly aligning it either with a
compass or even by just seeing what direction all the aerials about
point) until they get a max signal.

THey roughly point it in the same direction as the others. They then
should attach a signal meter to it and move it until they get the best
signal.

--
Conor

Opinions personal, facts suspect.

In message , Dave Fawthrop
wrote
On Sun, 24 Oct 2004 08:33:20 GMT, "Mat Overton"
wrote:

| Before doing it, just check that the aerial cable is not live by some
| means or other... -esp. if using an aluminium ladder!
|
| On that point, what is the power output of a masthead amp power supply.....
| ouch!

Only 12 V which will not kill you from electric shock, only kills you if it
makes you fall off a ladder.


If you want to test for the 12V has reaching the aerial just stick your
tongue across the terminals. If you don't fall off the roof then the
power isn't reaching the masthead amplifier.
--
Alan

"Bill" wrote
| Paul came in the other day, aghast. He had been approached on the
| street by another 'professional', an older man,

Oh dear.

| who wanted to buy a few bits and pieces

Is that how he put it.

| having been 'caught short'.

Was that his excuse, he should have 'gone before he left home'

| The experienced rigger advised Paul that the analyser was
| 'only a telly really, wiv knobs on, ain't it?' and that
| even an ordinary meter was unnecessary.

There are some really, really, sick people out there aren't there.

I hope Paul kicked him in the goolies and dialled 999.

Owain

"Linker3000" wrote
| ...and that was the abridged 'Readers Digest' version
| - the full version can be bought at Waterstones and
| all other good bookshops.

Serialised monthly in a popular "Television" magazine

Owain

"Angus Marshall" wrote in message
...
soup wrote:
spelling police
How do profesional riggers "point" an aerial.
profesSional
/spelling police

a.k.a '******s'

"soup" wrote in message
. uk...

From here it is 226 degrees to the transmitter, if (when) I get the
"profesionals" in will they point the aerial at 226 using a compass
or do they have some sort of meter that measures maximum signal
and they wiggle the aerial (after roughly aligning it either with a
compass or even by just seeing what direction all the aerials about
point) until they get a max signal.
--
yours S

Nihil curo de ista tua stulta superstitione

I have seen it done three ways:

1) It was a very clear day and the transmitter could be seen by climbing up
a little way;

2) Use of a signal meter, or

3) The aerial rigger told me that he had an internal transmitter detector
in his head! All three resulted in the aerial being properly aligned!


--
MESSAGE ENDS.
John Porcella

| Before doing it, just check that the aerial cable is not live by some
| means or other... -esp. if using an aluminium ladder!
|
| On that point, what is the power output of a masthead amp power
supply.....
| ouch!

Only 12 V which will not kill you from electric shock, only kills you if
it
makes you fall off a ladder.

Yes but the voltage isn't the issue, it's the wattage that hurts!

Alan wrote in message ...
In message , Dave Fawthrop
wrote
On Sun, 24 Oct 2004 08:33:20 GMT, "Mat Overton"
wrote:

| Before doing it, just check that the aerial cable is not live by some
| means or other... -esp. if using an aluminium ladder!
|
| On that point, what is the power output of a masthead amp power supply.....
| ouch!

Only 12 V which will not kill you from electric shock, only kills you if it
makes you fall off a ladder.


If you want to test for the 12V has reaching the aerial just stick your
tongue across the terminals. If you don't fall off the roof then the
power isn't reaching the masthead amplifier.

A touch dangerous? The TV's I have come across do not have an earth
connection, only live and neutral wires coming in. Hence, despite the
aerial connection being separated by caps, the chassis tends to float
to mid-rail (115V) unless connected to something else that is earthed,
e.g. hifi system. Try an ac voltmeter between the aerial socket and
earth (e.g. local radiator; water pipe, etc.) Current is very low, but
you can still get a tingling feeling!

"Mat Overton" wrote in message
o.uk...
| Before doing it, just check that the aerial cable is not live
by some
| means or other... -esp. if using an aluminium ladder!
|
| On that point, what is the power output of a masthead amp power
supply.....
| ouch!

Only 12 V which will not kill you from electric shock, only kills
you if
it
makes you fall off a ladder.

Yes but the voltage isn't the issue, it's the wattage that hurts!



In that case I'll keep away from you and your place if you don't mind.

It is the CURRENT that hurts - 10mA will hurt, 30mA across the heart
will kill. Skin resistance varies according to person, skin moisture
level, etc etc. I once knew a chap who could get a minor shock off
24V, but for most people something rather higher - nearer four
figures - is needed under normal circumstances.


--
Woody

wrote in message
...
On 24 Oct,
"harrogate2" wrote:

In that case I'll keep away from you and your place if you don't
mind.

It is the CURRENT that hurts - 10mA will hurt, 30mA across the
heart
will kill. Skin resistance varies according to person, skin
moisture
level, etc etc. I once knew a chap who could get a minor shock off
24V, but for most people something rather higher - nearer four
figures - is needed under normal circumstances.

50 volts can be enough to give you a big enough shock to lose
concentration,
and fall off a ladder. That will kill better than 30ma.




Touche.


--
Woody