first experiment on ASTRA 2D in C.ITALY

**paul682** · 26-04-2008

hy
guys

after a half day of test with my 3,7 m dish
i have a little understanding of this strange satellite

10729 v 22000 is the tp with more power

10906 is the one with lower power here

with my clarke tech 2100 plus

i try to tune some frequency but no result
because the quality was unsufficient

the quality goes up and down
from 70 % to 30
and when u try to tune something
the receiver doesnt find nothing
especially in the horizontal transponders

the vertical transponders have more stability

i try to get something also from 62 east middle east beam
and

i tune IRIB MUX at 11555 v 27500 with a little freeze
cause of bad signal!!!!!
the regional iranian channels
are too lower for my position ( i think )

my equipment
3,7 m prodelin
invacom ADF 120
invacom lnb 0,3 db

haVE SOMEONE some suggestion to increase the signal of 2D

or is a question of the dish ( too small )
i know that iceman from cyprus

receive all this transponders with only 50 cm more than me
is possible than i receive all the tp

or is better to use an lnb with magnetic polarizer
to better optimize the skew?????

i wait for an answer!
ciao

Coviello · 26-04-2008

Is your 3.7 dish is mesh? As it is known, mesh dishes do not work well in KU-band.
Regarding 62East (East beam), the best frequency is 11.556 GhZ. In Potenza (Basilicata), the signal is good during the whole day even though it varies from 5.6 dB - 8.0 dB (the threshold is 5.0 dB) which corresponds to 48%-55% on my receiver (the threshold is 40%).
Partial receptions (until noon and after 5. pm) at other two frequencies.
I use a 3.35m Prodelin dish + invacom.
Coviello

Coviello · 26-04-2008

Reading again your message I realized that you had been doing test with a (non-mesh) 3.7m Prodelin.
The original feed of my 3.35m Prodelin was absolutely inadequate and I replaced it with an Invacom Adjustable feedhorn C120 for prime focus antenna. Actually, I later replaced this with its "Cyprus version" (larger with many rings) which gave me some more improvements.
Since your (and my) dish is excellent, to get the best performance you have to be very accurate when putting the feed: use laser-pointer to find the exact central position of the feed; use some trick to find the best focal distance (it might not to be the same you find in the manual) a variation of 0.2 mm could make a difference.
I used all these idee to improve the performance of my Prodelin.
Unfortunately, no trace of Astra2d in Potenza.
But Central Italy, you can do it.
Central Italy is not too far from Potenza, and I would be happy to show you my Prodelin if you visited me.
Coviello

**paul682** · 28-04-2008

ciao coviello
thanks for you repliyng

sorry for late reply
on saturday i had a beezy day of work
until 10,00 pm

yesterday i was there on the dish to make some test

i found

10729 v
10714 h
10773 h
10744 h

the other transponder is too low for now
the idea of the laser point is good
now i go to purchase it

......................should be a great idea
to come to meet you

in these next week
i inform you when is possible
im happy to meet you in person
you are a very reliable person
thanks very much

more to come
i inform you when i have better result
with my dish
ciao
thanks again for your precious info

**paul682** · 28-04-2008

here some photo
shoot

25 april

**paul682** · 28-04-2008

some other click

piratt · 28-04-2008

Dont use invacom adjustable feedhorn ADF-120 for Astra2D this feedhorn works very bad only on Astra2D I tested and replace LNB with Invacom quad QDF-031

**paul682** · 28-04-2008

you mean the
illuminator

adf 120
????

or the lnb 0,3 ??????

which of these ones

illuminator???? or lnb ????

***bignick*** · 28-04-2008

Hi

The quad Invacom is better for 2D on port 2 or 3
If Coviello is getting better results with the large adjustable feed then that is the one to go for.

Have you bolted through the scalar ring on the existing feedhorn? Very bad if you have!

I cannot over emphasise the importance of EXACT Skew - if it is possible to receiver 2d then this will be key!

What equipment are you using to tune the dish - is it a spectrum analyser?

Cheers

Nick

piratt · 28-04-2008

Originally Posted by bignick

Hi

The quad Invacom is better for 2D on port 2 or 3
If Coviello is getting better results with the large adjustable feed then that is the one to go for.

Have you bolted through the scalar ring on the existing feedhorn? Very bad if you have!

I cannot over emphasise the importance of EXACT Skew - if it is possible to receiver 2d then this will be key!

What equipment are you using to tune the dish - is it a spectrum analyser?

Cheers

Nick

With my invacom quad best result on Astra2D give on port2 but for high band port 1 or 3 I selected my invacom quad from 5 invacoms and select who show low Signal Strength low gain and output give you best Signal Quality

**barney** · 28-04-2008

Originally Posted by paul682

you mean the
illuminator

adf 120
????

or the lnb 0,3 ??????

which of these ones

illuminator???? or lnb ????

Hi Paul.....
where are you in central italy?

Regards
Barney

**ralphmagno** · 28-04-2008

hi ralph here,
were are you with respect to naples italy??
if you get this working i want to visit you if you are within 3 hour drive.
do you have adjustable scaler rings on your feed?
keep us informed
can you take a picture of the feedhorn scaler rings
i have never seen adjustable ones
ralph

**paul682** · 29-04-2008

hy guys

thanks for all the replies

for the photo

i can help you with the

photo you can see on previous posts

for the invacom

you mean INVACOM QUAD LNB QDF 031 ????

or QTF 031?????? the one with

V / HIGH
H / HIGH
V / LOW
H / LOW
which of the 2 ones

the quad lnb QDF 031

or qtf 031 with the 4 band

thanks

piratt · 29-04-2008

Select Invacom QUAD QDF-031 this is best lnb for fringe area and Astra2D

**paul682** · 29-04-2008

for big nick

i use a UNA OHM

field meter old model

with a clarke tech 2100 old model

that have a very good signal level meter
and i use a strong srt 6155 fta

that have a very good tuner
in fact when with the clarke is good for the pointing

for see the image is better the strong!!!
with the strong i see clearly with some freeze 10729 v

with the clarke only black screen with " NO AUDIO / VIDEO "
on the screen

so the tuner of the strong is more sensible!!!!!
the feed i use is an invacom ADF 120 with scalar ring
i know that is the better on the market ... right now!!!!

ps i go now to purchase a quad invacom

i live in CIVITANOVA MARCHE central italy

ADRIATIC COAST riviera del conero

but the dish i have in MONTELUPONE 252 M sea level high

20 km far as my home town

where i have a little house wit h the dish!

ciao

i hope to explain all
wich is the situation

hope to meet someone of you
if want to come to me!!!!

NO PROBLEM
you welcome!

**paul682** · 29-04-2008

hi piratt

how big is your dish ????

to receive astra 2 d

in blugaria

i kn ow

that iceman in cyprus can receive it with a 4,2 m !!!!!

with the quad invacom .....

i am sure to get all 2d with my 3,7 m dish

100%

if not
put the dish into fire

eh eh eh!!!!!!!

let see and wait for these new lnb!!!!....
more to come!
ciao

**Analoguesat** · 29-04-2008

Originally Posted by paul682

that iceman in cyprus can receive it with a 4,2 m !!!!!

with the quad invacom .....

i am sure to get all 2d with my 3,7 m dish

ciao

It doesnt work like that - in extreme fringe reception you get "hotspots" where the reception is better than expected and "coldspots" where it is worse than expected. These are caused by minute imperfections in the transmission dish up on the satellite.

So for example even if someone 50 km down the road can get all the 2D tp's with a 3.7m dish theres no guarantee at all you will be able to get them with the same sized dish. We know southern Italy is in an exceptionally poor location for 2D.

However, best of luck, your experiments are very interesting

***deepbluesky*** · 29-04-2008

piratt is located in Vidin NW BG and uses a 1.80m and gets all the Verticals of 2D, no Horizontals. I have to point out that he lives in a sidelobe area that covers Poland, Slovakia, Hungary, Northern Serbia as well Western Romania and Bulgaria.

Some screenshots and measurements from Roman David in Slovakia:
_http://web2.dxsatcs.66.sk/php66/index.php?str=40

***snap*** · 29-04-2008

Originally Posted by paul682

haVE SOMEONE some suggestion to increase the signal of 2D

Yes, easy!
Change the single Invacom you have for a Quad QDF -031, NOTthe Quattro, QTF-031.
The single C120 Invacom is, for reasons unknown, much poorer for weak 2D reception.

charly20 · 29-04-2008

or try another brand of LNB

Inverto has a nice quattro flange LNB

piratt · 29-04-2008

Originally Posted by paul682

hi piratt

how big is your dish ????

to receive astra 2 d

in blugaria

i kn ow

that iceman in cyprus can receive it with a 4,2 m !!!!!

with the quad invacom .....

i am sure to get all 2d with my 3,7 m dish

100%

if not
put the dish into fire

eh eh eh!!!!!!!

let see and wait for these new lnb!!!!....
more to come!
ciao

Hi my dish is 1.80m but made in russian this is very quality dish

i receive all vertical transponders from Astra2D not horizontal,i use LNB Invacom QUAD QDF-031 my frend with 2.10m dish and LNB Sharp not receive 10.729V,10.906V and 11.758V but with my dish works

**barney** · 29-04-2008

Originally Posted by ralphmagno

hi ralph here,
were are you with respect to naples italy??
if you get this working i want to visit you if you are within 3 hour drive.
do you have adjustable scaler rings on your feed?
keep us informed
can you take a picture of the feedhorn scaler rings
i have never seen adjustable ones
ralph

Ciao Ralphmagno,
i'm 40Km south of Pescara, i have a 3mt dish...but no astra 2d...... we can make a party with paul862 and

astra 2d coming

**koansrc** · 29-04-2008

Originally Posted by bignick

I cannot over emphasise the importance of EXACT Skew - if it is possible to receiver 2d then this will be key!

Hi bignick, what do you make of the different skew settings from the different calculators out there ? It was this comment of yours that got me thinking ( again ) in this thread : lnb skew / polarization angle

**ralphmagno** · 29-04-2008

hello to all,
called irte in gallarate who made the dish.
they sent me mounting instructions for all the prime focus dishes.
the 4 meter has a focus of 154.6 cm and mine is at 157 cm.
just a tad off.
i had to stand in the dish to measure this with a meter stick and i took several measurments.
the skew looks to be on the money were the irte has scalor rings but are not adjustible as all.
i liked the pictures does anyone know c italy were it is???
i am using a new QTF 031 with .3 noise figure and horz and vert high and horz and vert low into a multiswitch.
i will try to focus this better and check the alignment again probally over the weekend.
will post my picture again for those to see again
tha

nks
ralph

***bignick*** · 29-04-2008

Originally Posted by koansrc

Hi bignick, what do you make of the different skew settings from the different calculators out there ? It was this comment of yours that got me thinking ( again ) in this thread : lnb skew / polarization angle

I must admit, I have no idea why the calculaors give such a wide variation in figures. My rational for what I said is purely based on experience. A tiny adjustment at a time - the smaller the better and spend a minute each time you make the adjustment watching the picture as 2d signal does have variations right on fringe reception.

Cheers

Nick

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