In-line Amplifier

A

amirali_esh

Regular Member
Messages
11
Likes
0
#1
Hi all,

I have two questions about in-line amplifiers :


1) Should I install in-line amplifiers in middle of the cable or at the end of the cable before the recevier?

2) Is it possible to cascade two in-line amplifiers to achieve more amplification?


Thanks
 
PaulR

PaulR

Dazed and Confused Admin
Staff member
Messages
15,924
Likes
3,163
My Satellite Setup
-----------See sig-----------
My Location
Wirral, NW UK and Vaucluse, France.
#2
Amplifiers are really not to be recommende but if you MUST use one it should go near the satellite dish or aerial.

Why do you think you need and amplifier? They aren't a substitute for a weak signal, they are only useful for overcoming excessive loss in the downlead. And to be honest it's better policy to change to a lower loss cable.

PaulR
 
rolfw

rolfw

Believe it when I see it Admin.
Staff member
Messages
37,727
Likes
1,291
My Satellite Setup
Technomate 5402 HD M2 Ci, DM7000s, Transparent 80cm Dish, Moteck SG2100 DiseqC motor, lots of legacy gear. Meters: Satlook Digital NIT, Promax HD Ranger+ spectrum analyser.
My Location
Berkshire
#3
As PaulR says, they are no substitute for a weak signal and will probably make things worse on a normal cable run. I have fitted the occasional one on 40/50m cable runs and have heard that it is best in the middle of the cable run, but have fitted mine near the LNB and have received reasonable results.

There is apparently a good technical reason for fitting in the middle, perhaps to do with signal noise.
 
A

amirali_esh

Regular Member
Messages
11
Likes
0
#4
I have a problem which is discussed in this thread. I am thinking maybe in-line amplifier can fix my problem.
 
rolfw

rolfw

Believe it when I see it Admin.
Staff member
Messages
37,727
Likes
1,291
My Satellite Setup
Technomate 5402 HD M2 Ci, DM7000s, Transparent 80cm Dish, Moteck SG2100 DiseqC motor, lots of legacy gear. Meters: Satlook Digital NIT, Promax HD Ranger+ spectrum analyser.
My Location
Berkshire
#5
Only if you have a long cable run, which you don't comment on in the thread you mention or this thread.

PS. Cascading them would pretty much be a no no.
 
R

rossy

Regular Member
Messages
151
Likes
0
My Satellite Setup
Skybox f3 spiderbox died hd9000 technomate 1500ci+, skystar2,1.1m dish .3db bluline lnb,Sky,
Span 58W to 42e with trees bare! 42e gone and now 39e
My Location
southern england, Berkshire
#6
Just as a side issue. How much difference can using good quality satellite cable versus regular coaxial cable on say a 40 foot run from dish to Receiver? What cable quality do you reckon to be the most suitable and affordable?
Thanks



PaulR said:
Amplifiers are really not to be recommende but if you MUST use one it should go near the satellite dish or aerial.

Why do you think you need and amplifier? They aren't a substitute for a weak signal, they are only useful for overcoming excessive loss in the downlead. And to be honest it's better policy to change to a lower loss cable.

PaulR
 
rolfw

rolfw

Believe it when I see it Admin.
Staff member
Messages
37,727
Likes
1,291
My Satellite Setup
Technomate 5402 HD M2 Ci, DM7000s, Transparent 80cm Dish, Moteck SG2100 DiseqC motor, lots of legacy gear. Meters: Satlook Digital NIT, Promax HD Ranger+ spectrum analyser.
My Location
Berkshire
#7
The difference gained by switching from CT100 or equivalent to say CT125, will be about 5 DB over 100m, so is not going to make huge differences over a 30m run, but of course could be critical on the 100m run.
 
Top