DoktorOfSat SETUP

[Satcom1]

@Turok


68,5 is a very strange bird (in C band) indeed.With my MTI I can't get so much channels as with Inverto (photo).The inverto has only one pin. That means this lnb can get only one polarization .In order to get the other you must turn it 90 degress.But only on 68,5E in a certain position it get H and V polar at the same time , very strange isn't it?

This type of LNBF is most often used with a Chapperal feedhorn and a Polarizer. This is a servo motor that adjusts the polarity of the signal coming into the LNBF so the receiver tells the feedhorn which H or V to tune and the servo motor does the work. So the lnbf with one pin gets eather a H or V feed from the feedhorn.

 

[Analoguesat]

NO signal, already checked

Analoguesat let's wait for an official coverage map of this bird

Not good for western Europe....

http://www.satellites.co.uk/satellite/satellite-footprint-library/159600-eutelsat-w76.html

although the map shows a most odd coverage pattern......

 

[doktorofsat]

Analoguesat

Ihave never saw such as coverage map in my life

Please BombedOne , Turok and some asian forum colegs to test it

 

[Turok]

Hello good evening!
what type of chappral feedhorn do you use for cband?
i have only the chapparal omni polareizer here,that is for kuband!
here in europe,nearly imposible,to find chapparal feedhorns!
how much better is the performance,then without?

 

[pipino]

Hello good evening!
what type of chappral feedhorn do you use for cband?
i have only the chapparal omni polareizer here,that is for kuband!
here in europe,nearly imposible,to find chapparal feedhorns!
how much better is the performance,then without?

you can perfectly find a corotor C/Ku chaparall as new now days covering the european bands ..are you looking for one?

 

[Turok]

Hi!
good evening,i have a corotor type 2 from chappral here,but the signal lost,in kuband is to high!
for cband okay,but i never use feedhorns,on a dish,because i dont have any,and want to find out,how good the performace winning,of the chapparal feedhorn satcom1 talk about will be!
my corotor 2 has many patent numbers printed on,iam not sure how many diffrente version realy exiits the wide band version with the kuband extension,and also one,where you can fit 3 lnbs on it includiding sband,but now this band is swtiched off,now my lnb is usless,maybe in usa sband is still alive i dont know..!

 

[doktorofsat]

Here is a good schematics of the scalar rings for offset dish

@Turok

What is your western reception limit in C band?

 

[pipino]

few months ago i posted pictures of some stuff i have from chaparral ,until now i never had achance to do a proper testing

check this up

http://www.satellites.co.uk/satellite/817838-post8.html

 

[Turok]

Hello!
my limit in the west is 45 west,cctv in cband here signal very strong,then the mauntain comes,and absolute zero..!

but there are here many areas where the have much more problems,for receiving astra ,i see some placec the install a 10 meter mast in the landscape far away from the house to catch it.in nabour village the limit is at 34 west ,so here for the situation with everywhere 2500 m high mauntains,i am happy with the result!
the good think is,no wind problems,for big dishes,because the big mauntains,block the wind!
no location is perfect,when you live near the ocean,the salt water in the air destroy you the motors very qickly or what ever..!

 

[pipino]

Wow wonderful place:-worship

 

[Turok]

yup,i like it also here,very quite,and ice cold in the winter,very good for cband reception ,when it has minus 17.-20 degrees outsite,i got much more channels then in summer time,here more pictures from the mauntains!


_http://images.google.de/images?hl=de&source=hp&q=montafon&um=1&ie=UTF-8&sa=N&tab=wi


okay now back to dr.s setup!
i only want to answer the questions!

 

[Satcom1]

Here is a good schematics of the scalar rings for offset dish

@Turok

What is your western reception limit in C band?

This works better then commercial conical Scalar.

 

[doktorofsat]

Today I'll upload photos with my next dish a 180cm PFA .I know I worked a lot with the design .First time I wanted to made a black &with dish (knowin that I got a white 6 paneled dish) but when I got it was a lite grey one

I wondered for a while and after a couple of days I decided to use a super red painting.Here are the results

I put also a picture with my current dish.In the photo is on 93,5East! I wondering if I have chance to get 96,5East in C band of course.

In that 2 photos you can see the "viewing" conditions of my dish to the east side.As you can see there are some hills at aprox.12-15Km to my QTH and this can be a problemo.The last photo was made at a hight of 20m , and you can see better the hills I talked about!

With my actual 150cm dish I have never catch 96,5E but I hope with the next one I'll have good results!

Nowadays I made the polarmount!

 

[nelson_b]

nice - pics --- the dish looks good

the hills are quite far away -- maybe not a problem --
looking at your location details - 93,5East is 2.8 degrees elevation -for you

i,v put up a 80 cm fixed dish here- ( too small realy ) -for - 68.5°E - K/u band with only 2.4 degrees elevation -- and it works - "just "-
and i have hills 6 miles away .

regards nelson.b.

 

[doktorofsat]

I finished today the polarmount

It was hard to do it believe men.

I wait now for a better weather

 

[Vipersan]

A very nice job of work there Doktor...
You must be very proud of your construction..
rgds
VS

 

[Lazarus]

Well said, Vipersan


What a shame we aren't allowed (overt) monstrosities here in the UK

 

[Vipersan]

What a shame we aren't allowed (overt) monstrosities here in the UK

Indeed ...in word 'Gutted'

My dad owns a small piece of land to the rear of my house..
Certainly big enough to mount a 3 mtre+ dish at ground level ...and has a more or less unobstructed southern outlook..
The land is overgrown with no vehicle access ...and suitable for little else...but no-way would the local council approve such a project..
cest la vie


rgds
VS

 

[doktorofsat]

Tivu
I ask

If you stay in UK and you have your own house is there a problem if you install a 180cm dish 4 example in garden??!!

 

[Vipersan]

Tivu
I ask

If you stay in UK and you have your own house is there a problem if you install a 180cm dish 4 example in garden??!!

As it happens Doktor I have a 1.8PF in my back yard ....which I erected 20 years back ..
In those days officials were less inclined to impose restrictions ..providing it wasn't constructed to stand higher the a garden shed..
I'd have a job getting it passed today ..but I don't think they can have me remove it after it has stood without complaint for more than 10 years..
You have no idea how restrictive rules and regs are in the UK ..
Your land isn't your own in their eyes.
rgds
VS