pauxis Cheapo C Band LNB

Vipersan

Hi friends ...
My cheepy LNB arrived this morning ...but I'm a little confused ?

The LNB is H/V switched ...and Im not expecting miracles from it ...but the majority of C band transponders in the receivable in the UK are circular R/L ...
Should I have also received a dialectric plate in the throat of the lnb to make reception possible ?

If so then it looks like it was a waste of money ...and my first trip to C-band will be somewhat delayed.

Is there any 'household' material I can cut a slice of to substitute for the missing plate ?
any info would be appreciated.
rgds
VS

Channel Hopper

Most of the signal from a circular polarised signal will be received, the real problems come when there are two transponders near in frequency on opposite polarities.

The plastic used in the trade paint tubs is I believe suitable for making a dielectric plate out of.

There is a very fine line between "hobby" and "mental illness"

Vipersan

Thanks for the speedy reply m8..
I've just discovered during my 'hunt' around the house ..that the non stick chopping board in the kitchen is just the right thickness for the guides ...
I just hope its the right sort of material ..
Opaque Polythene or somesuch ..
..either way ..its going to be about 2 inches shorter by the end of the day ..
lol

Vipersan

..btw Channel Hopper ...
Do you know which is likely to be the strongest set of channels receivable in the uk ..on C-Band and which bird I should try first for alignment purposes.

..I also have to work out how to use dvbviewer with a cband lnb ...as I don't have any up-to-date transbonder .ini files.

rgds
VS

Turok

Hello!
the strongest cband signals in europe are on the telecom satellite on 8 west,and on 40,5 west the encrypted programm RCN TV is the strongest transponder!
also very strong is the View Asia Transponder on Intelsat 10 on 68,5 east!
the express satellite,in the east,should be also strong enough,to finding a satellite!
for better singnal,replace,your dilektrikum plate,with tevlon material,that you cuttet before,in the same size,then your old plate,tevlon looks like a clear disc!

Vipersan

Thanks for your reply Turok ..
Did you mean 5 west ?
I can't see any C band feeds on 8 west ...according to lyngsat.
rgds

Turok

sorry yes i meaned 5 west

Vipersan

..Good news so far ...
I had to remove the whole mount assembly from my 1.8 m dish as the lnb body is too wide to fit in the bracket ..
The Pauxis is currently suspended between the tripod legs by long cable ties ....but I have managed to pull in unbroken pictures from DWTV Africa (3727 R) on my Humax HDCI 2000 with the built in signalmeter showing 59%...
A bit of a lash up but ..at least it proves its possible..

..I still haven't worked out why I cannot get the same channels on my Twinhan pci card and dvbviewer ??

..still..its a start..
rgds

Channel Hopper

Congratulations, next you will start wanting a larger dish.

There is a very fine line between "hobby" and "mental illness"

Vipersan

...Hi m8's

A progress report on my refurb..
By careful manipulation of the Pauxis I've so far had signals from
1 West
5 West
27 West
and 40 West

...my main problem is that I've removed the origional LNB mount boss from the tripod ...as its too narrow to use with the Pauxis...
..or indeed any c band fitting.
To that end I've cut a new mount boss out of 3mm thick aluminium ..
So far its nothing more than a flat 3 legged spider with an lnb sized hole at the centre..and will require some bending and shaping to fit it.
My tripod is made of solid carbon fibre 15mm round rods which just clamp to the origional boss with mini u-bolts ...and theres no facility to screw anything at the focal point ends.
Luckily ..with the rods being 15mm ...some 15mm copper water pipe clips should provide a solution.

.. my friends think I'm mental to go to all this trouble ..but what can you do if your unidentifiable 20+ year old dish needs parts ..
...well you just gotta make 'em.

c'est la vie
VS

nelson_b

nice one -- Vipersan --

i,v been experimenting last month with a cheapo pauxis also - but on a 1.8 channel master offset dish --with quite good results generaly

i found 22 west had quite strong signals - also --

i look forward to the next update ---- from you

regards - nelson.b

Turok

Hello!
where you you bought this pauxis lnb,never heard about this brand,is it made in chaina?
how many kelvin noice temperature,your lnb have?

nelson_b

hi --

dont know where- Vipersan- got his from ?

mine was bought from china

Ebay- uk item no -- 310158935557

on the box it came in it says designed in the U.S.A.

regards nelson_b.

Vipersan

Hi Turok ..
Nelson is correct ..
This cheapo lnbf was an impulse buy from Ebay ..and basically inspired me to make my 1.8m dish useful again ..
Prior to this ..it had remained parked at 1West for almost a year ..as I have a motorised triax 110 for most of my channel hopping..

here is the copied spec :-

Specification:

Input Frequency 3.4~4.2GHz
L.O. Frequency (At 25oC): 5.15GHz
STABILITY(-30oCTO+60oC) <+/-2MHz
Output Frequency: 950~1750MHz
NOISE: 17°k
Conner Gain: 60dB (typ.)
Output VSWR: <2.0:1
Output Port Type: F (FEMALE)/750hm
IMAGE REJECTION >45dB
Phase Noise: -55dBc@1KHz /-75dBc@10KHZ /-95dBc@100KHZ
DC FREQUIREMENT: 11-14V(VF) /16-20V(HF)
Working Temperature: -40oC~+60oC
Polarity Type: V/H, LHCP/RHCP
Size: 165mm in length, 65mm in diameter
Weight: 392g

rgds
VS

Turok

I Use,in the meantime,the Panorama 13 kelvin lnb,from the chniese company sun create technologys co ltd

with this,i have more stable signal,then with mti 15 kelvin that i use before,espasaly in cband on 68 ,5 east,when the signals are sometimes depents on the weather very week!
some transponder,i have now signal with 13 kelvin,where i have with 15 and 17 kelvin no signal,before!

antenna1

I have the same lnb i got it a few weeks ago have not used it yet what dish are you using it on.

Turok

my echostar 2.40 m mesh dish,that you see on the avatar picture!

i have 2 panorma 13 kelvin,and it was very intresting,that both lnbs from the same modell type ER-861.does not have,the exactly the same performance,one was better then the other !

the better one,that i use now, has a strange lof drift of 2 mhz,i have to set the lof now to 5148,to get correct orginal freqency!
other people confirmed my,that every panorma lnb,has a little drift,some of 5 mhz and more!
this,i see first time only on this brand!

Vipersan

..Well I've finished my feed boss construction ...though I might take it down and give it a coat of paint at weekend..

I started with a flat square of aluminium ...and turned it into a thing of beauty ...at least it is to me ..

The lnb support collar and clamp is made from cut and shaped strips of tin plate ....and the clamps attatching the boss to the carbon fibre tripod are 15mm water pipe clamps.

here are some pictures to go with it ...the last one shows the pauxis lnbf mounted..
rgds
VS

Vipersan

Hmm ...
I'll try again with the pictures

Attached Thumbnails

     

antenna1

Very good job and good diy skills did the lnb no come with a prime focus scalar ring? at all

Vipersan

Indeed it did m8 ..a very basic one .. with only one outer ring ..
You can see it in the last picture where the whole assembly is mounted..

..I may remove the boss again tomorrow and double up on the 15mm pipe clips on each of the 3 mounting 'wings' ...to add a little more rigidity ..
I noticed when rotating the lnbf for skew adjustment ..that a good amount of torque is possible to the whole boss/lnbf mass...which remains until manually twisted back.


..still ..you find these things out as you go..
rgds
VS

Vipersan

Hi m8's ..
With regard to the scalar plate provided with this lnbf (as shown in the last picture)

...does the fact that it only has the one outer ring mean that it is only realy providing noise rejection ? ...and could signal capture be improved by fitting a scalar plate with more rings ?

If so ..I will have to scour the net ..and see what I can come up with ..
rgds
VS