Max length for sat IF downlead

Hi, all.

What's the maximum reasonable length for a sat IF downlead from the LNB,
before it reaches the multi-switch? ( with no amps or other wizardry in
line. )

The reason I ask is because we're surrounded by tall trees here, and I'm
struggling to get a clear Line of Sight, so I'm toying with the idea of
having the dish slightly remote, where I can get a clearer LOS.

I'm open to suggestions on using higher spec cable etc if necessary.

--
Ron

"Ron Lowe" ronATlowe-famlyDOTmeDOTukSPURIOUS wrote in message
...
Hi, all.

What's the maximum reasonable length for a sat IF downlead from the LNB,
before it reaches the multi-switch? ( with no amps or other wizardry in
line. )

The reason I ask is because we're surrounded by tall trees here, and I'm
struggling to get a clear Line of Sight, so I'm toying with the idea of
having the dish slightly remote, where I can get a clearer LOS.

I'm open to suggestions on using higher spec cable etc if necessary.

--
Ron




I wouldn't worry too much unless you're talking about relocating to the
other side of a forest or something. How far away is the ideal dish
position? What's wrong with using some line powered amplifiers to overcome
the cable losses?

"Carpy" wrote in message
...

"Ron Lowe" ronATlowe-famlyDOTmeDOTukSPURIOUS wrote in message
...
Hi, all.

What's the maximum reasonable length for a sat IF downlead from the LNB,
before it reaches the multi-switch? ( with no amps or other wizardry in
line. )

The reason I ask is because we're surrounded by tall trees here, and I'm
struggling to get a clear Line of Sight, so I'm toying with the idea of
having the dish slightly remote, where I can get a clearer LOS.

I'm open to suggestions on using higher spec cable etc if necessary.

--
Ron




I wouldn't worry too much unless you're talking about relocating to the
other side of a forest or something. How far away is the ideal dish
position? What's wrong with using some line powered amplifiers to overcome
the cable losses?



I havn't established an ideal dish position yet, but we're talking tens of
meters.

There is no place mid-span to locate any form of amplifier, ( other than
nailed to a tree... ) and no power source. It would be a straight cable
run. Are there amps that take their power from the LNB supply?

Not sure if the multiswitch supply can throw out enough current for it and
the LNB.
( triax 7 in 12 out model )

I'm looking for guidance as to what cable length we'd need to start
considering in-line amplification or other wizardry.

--
Ron

Correction:

( triax ^H^H^H^H^H ANTIFERENCE 7 in 12 out model )
http://www.antiference.tv/isys7-stan...-multiswitches

--
Ron

Ron Lowe wrote:

I'm looking for guidance as to what cable length we'd need to start
considering in-line amplification or other wizardry.

Bill Wright says about 60 metres for CT-100 grade cable

http://groups.google.com/group/uk.tech.tv.sky/browse_frm/thread/37006cf88351a8f/3bf73c89fb1b2532?lnk=gst&q=max+length+wright#3bf73 c89fb1b2532


--
Mark
Please replace invalid and invalid with gmx and net to reply.

"Ron Lowe" ronATlowe-famlyDOTmeDOTukSPURIOUS wrote in message
...
"Carpy" wrote in message
...

"Ron Lowe" ronATlowe-famlyDOTmeDOTukSPURIOUS wrote in message
...
Hi, all.

What's the maximum reasonable length for a sat IF downlead from the LNB,
before it reaches the multi-switch? ( with no amps or other wizardry in
line. )

The reason I ask is because we're surrounded by tall trees here, and I'm
struggling to get a clear Line of Sight, so I'm toying with the idea of
having the dish slightly remote, where I can get a clearer LOS.

I'm open to suggestions on using higher spec cable etc if necessary.

--
Ron




I wouldn't worry too much unless you're talking about relocating to the
other side of a forest or something. How far away is the ideal dish
position? What's wrong with using some line powered amplifiers to
overcome the cable losses?



I havn't established an ideal dish position yet, but we're talking tens of
meters.

There is no place mid-span to locate any form of amplifier, ( other than
nailed to a tree... ) and no power source. It would be a straight cable
run. Are there amps that take their power from the LNB supply?

Not sure if the multiswitch supply can throw out enough current for it and
the LNB.
( triax 7 in 12 out model )

I'm looking for guidance as to what cable length we'd need to start
considering in-line amplification or other wizardry.

--
Ron





Line amplifiers just take power from the multiswitch LNB supply and will
work fine with that switch. You can get waterproof plastic enclosures for
outside use for about £5. Just put the line amps in here and screw the box
to the tree! You might also want to consider direct burial cable unless you
are attaching it to a fence or something. Try it without the amps and then
if you have problems get 4 line amps and plug em in. I like the Vision ones
but there are plenty out there which are cheaper and work well.

"Carpy" wrote in message
...

"Ron Lowe" ronATlowe-famlyDOTmeDOTukSPURIOUS wrote in message
...
"Carpy" wrote in message
...

"Ron Lowe" ronATlowe-famlyDOTmeDOTukSPURIOUS wrote in message
...
Hi, all.

What's the maximum reasonable length for a sat IF downlead from the
LNB, before it reaches the multi-switch? ( with no amps or other
wizardry in line. )

The reason I ask is because we're surrounded by tall trees here, and
I'm struggling to get a clear Line of Sight, so I'm toying with the
idea of having the dish slightly remote, where I can get a clearer LOS.

I'm open to suggestions on using higher spec cable etc if necessary.

--
Ron




I wouldn't worry too much unless you're talking about relocating to the
other side of a forest or something. How far away is the ideal dish
position? What's wrong with using some line powered amplifiers to
overcome the cable losses?



I havn't established an ideal dish position yet, but we're talking tens
of meters.

There is no place mid-span to locate any form of amplifier, ( other than
nailed to a tree... ) and no power source. It would be a straight
cable run. Are there amps that take their power from the LNB supply?

Not sure if the multiswitch supply can throw out enough current for it
and the LNB.
( triax 7 in 12 out model )

I'm looking for guidance as to what cable length we'd need to start
considering in-line amplification or other wizardry.

--
Ron





Line amplifiers just take power from the multiswitch LNB supply and will
work fine with that switch. You can get waterproof plastic enclosures for
outside use for about £5. Just put the line amps in here and screw the box
to the tree! You might also want to consider direct burial cable unless
you are attaching it to a fence or something. Try it without the amps and
then if you have problems get 4 line amps and plug em in. I like the
Vision ones but there are plenty out there which are cheaper and work
well.




More careful observations now suggest that I do in fact have LoS above the
trees from the chimney.

After making a cardboard protractor set to 19.7 degrees, and holding the
base of it level, if I look along it, I'm clear of the trees by a reasonable
margin. More than I guessed by eye and arm-waving.

So I may not need to do a remote dish installation.

--
Ron

"Ron Lowe" ronATlowe-famlyDOTmeDOTukSPURIOUS wrote in message
...
"Carpy" wrote in message
...

"Ron Lowe" ronATlowe-famlyDOTmeDOTukSPURIOUS wrote in message
...
"Carpy" wrote in message
...

"Ron Lowe" ronATlowe-famlyDOTmeDOTukSPURIOUS wrote in message
...
Hi, all.

What's the maximum reasonable length for a sat IF downlead from
the LNB, before it reaches the multi-switch? ( with no amps or
other wizardry in line. )

The reason I ask is because we're surrounded by tall trees here,
and I'm struggling to get a clear Line of Sight, so I'm toying
with the idea of having the dish slightly remote, where I can get
a clearer LOS.

I'm open to suggestions on using higher spec cable etc if
necessary.

--
Ron




I wouldn't worry too much unless you're talking about relocating to
the other side of a forest or something. How far away is the ideal
dish position? What's wrong with using some line powered amplifiers
to overcome the cable losses?



I havn't established an ideal dish position yet, but we're talking
tens of meters.

There is no place mid-span to locate any form of amplifier, ( other
than nailed to a tree... ) and no power source. It would be a
straight cable run. Are there amps that take their power from the
LNB supply?

Not sure if the multiswitch supply can throw out enough current for
it and the LNB.
( triax 7 in 12 out model )

I'm looking for guidance as to what cable length we'd need to start
considering in-line amplification or other wizardry.

--
Ron





Line amplifiers just take power from the multiswitch LNB supply and
will work fine with that switch. You can get waterproof plastic
enclosures for outside use for about £5. Just put the line amps in
here and screw the box to the tree! You might also want to consider
direct burial cable unless you are attaching it to a fence or
something. Try it without the amps and then if you have problems get
4 line amps and plug em in. I like the Vision ones but there are
plenty out there which are cheaper and work well.




More careful observations now suggest that I do in fact have LoS above
the trees from the chimney.

After making a cardboard protractor set to 19.7 degrees, and holding
the base of it level, if I look along it, I'm clear of the trees by a
reasonable margin. More than I guessed by eye and arm-waving.

So I may not need to do a remote dish installation.

....unless the trees grow.

Martin

"gm6trs" . wrote in message
...

"Ron Lowe" ronATlowe-famlyDOTmeDOTukSPURIOUS wrote in message
...
"Carpy" wrote in message
...

"Ron Lowe" ronATlowe-famlyDOTmeDOTukSPURIOUS wrote in message
...
"Carpy" wrote in message
...

"Ron Lowe" ronATlowe-famlyDOTmeDOTukSPURIOUS wrote in message
...
Hi, all.

What's the maximum reasonable length for a sat IF downlead from the
LNB, before it reaches the multi-switch? ( with no amps or other
wizardry in line. )

The reason I ask is because we're surrounded by tall trees here, and
I'm struggling to get a clear Line of Sight, so I'm toying with the
idea of having the dish slightly remote, where I can get a clearer
LOS.

I'm open to suggestions on using higher spec cable etc if necessary.

--
Ron




I wouldn't worry too much unless you're talking about relocating to
the other side of a forest or something. How far away is the ideal
dish position? What's wrong with using some line powered amplifiers to
overcome the cable losses?



I havn't established an ideal dish position yet, but we're talking tens
of meters.

There is no place mid-span to locate any form of amplifier, ( other
than nailed to a tree... ) and no power source. It would be a
straight cable run. Are there amps that take their power from the LNB
supply?

Not sure if the multiswitch supply can throw out enough current for it
and the LNB.
( triax 7 in 12 out model )

I'm looking for guidance as to what cable length we'd need to start
considering in-line amplification or other wizardry.

--
Ron





Line amplifiers just take power from the multiswitch LNB supply and will
work fine with that switch. You can get waterproof plastic enclosures
for outside use for about £5. Just put the line amps in here and screw
the box to the tree! You might also want to consider direct burial cable
unless you are attaching it to a fence or something. Try it without the
amps and then if you have problems get 4 line amps and plug em in. I
like the Vision ones but there are plenty out there which are cheaper
and work well.




More careful observations now suggest that I do in fact have LoS above
the trees from the chimney.

After making a cardboard protractor set to 19.7 degrees, and holding the
base of it level, if I look along it, I'm clear of the trees by a
reasonable margin. More than I guessed by eye and arm-waving.

So I may not need to do a remote dish installation.

...unless the trees grow.

Martin

The trees are very mature, and I'm not expecting further rapid growth.

I have a fall-back possibility of mounting the dish at a lower position,
closer to the trees, where it can see the sky *under* the foliage.

--
Ron

"Ron Lowe" ronATlowe-famlyDOTmeDOTukSPURIOUS wrote in message
...
"gm6trs" . wrote in message
...

"Ron Lowe" ronATlowe-famlyDOTmeDOTukSPURIOUS wrote in message
...
"Carpy" wrote in message
...

"Ron Lowe" ronATlowe-famlyDOTmeDOTukSPURIOUS wrote in message
...
"Carpy" wrote in message
...

"Ron Lowe" ronATlowe-famlyDOTmeDOTukSPURIOUS wrote in message
...
Hi, all.

What's the maximum reasonable length for a sat IF downlead from the
LNB, before it reaches the multi-switch? ( with no amps or other
wizardry in line. )

The reason I ask is because we're surrounded by tall trees here, and
I'm struggling to get a clear Line of Sight, so I'm toying with the
idea of having the dish slightly remote, where I can get a clearer
LOS.

I'm open to suggestions on using higher spec cable etc if necessary.

--
Ron




I wouldn't worry too much unless you're talking about relocating to
the other side of a forest or something. How far away is the ideal
dish position? What's wrong with using some line powered amplifiers
to overcome the cable losses?



I havn't established an ideal dish position yet, but we're talking
tens of meters.

There is no place mid-span to locate any form of amplifier, ( other
than nailed to a tree... ) and no power source. It would be a
straight cable run. Are there amps that take their power from the
LNB supply?

Not sure if the multiswitch supply can throw out enough current for it
and the LNB.
( triax 7 in 12 out model )

I'm looking for guidance as to what cable length we'd need to start
considering in-line amplification or other wizardry.

--
Ron





Line amplifiers just take power from the multiswitch LNB supply and
will work fine with that switch. You can get waterproof plastic
enclosures for outside use for about £5. Just put the line amps in here
and screw the box to the tree! You might also want to consider direct
burial cable unless you are attaching it to a fence or something. Try
it without the amps and then if you have problems get 4 line amps and
plug em in. I like the Vision ones but there are plenty out there which
are cheaper and work well.




More careful observations now suggest that I do in fact have LoS above
the trees from the chimney.

After making a cardboard protractor set to 19.7 degrees, and holding the
base of it level, if I look along it, I'm clear of the trees by a
reasonable margin. More than I guessed by eye and arm-waving.

So I may not need to do a remote dish installation.

...unless the trees grow.

Martin

The trees are very mature, and I'm not expecting further rapid growth.

I have a fall-back possibility of mounting the dish at a lower position,
closer to the trees, where it can see the sky *under* the foliage.

--
Ron




Your neighbours must think you've gone bonkers, standing outside under the
foliage holding a small piece of cardboard to your nose and looking up to
the sky through one eye.