40.5W SES6 & NSS806

[scopus]

thanks guys!

theres a lot of factors involved here...i.e where to place the polo pipe exactly on the LNB bracket (i.e how far away or how close to the dish should it be), does the pipe need rotating to peak gain, or only the LNB within the pipe? then theres the scalar hood , where to place that.

also, what happens on satellites that use linear? does the polo pipe "work it out"

its good to have these options of course, just adds to the tweaking time.

Yes, a lot of tweaking will be required..

 

[John]

thanks guys!

theres a lot of factors involved here...i.e where to place the polo pipe exactly on the LNB bracket (i.e how far away or how close to the dish should it be), does the pipe need rotating to peak gain, or only the LNB within the pipe? then theres the scalar hood , where to place that.

also, what happens on satellites that use linear? does the polo pipe "work it out"

its good to have these options of course, just adds to the tweaking time.

I don't use a polo pipe any more but it was good on my system when used with a Zinwell
The front of your polo pipe becomes what was the front of your previous lnbf, your off-set scalar ring goes over the front of the barrel as before and tweaked as normal.
I did this for setting the barrel & Zinwell up on mine : I lined the inner 'side steps' of the barrel so that they are vertical with the focal point set as before with the previous lnbf and tweaked if needed. Clamp the barrel and leave it fixed solid in this position after all tweaking has been done.
To establish correct polorisation of firstly say a RHC signal from 40.5West, select a suitable strong enough signal frequency, select the 'V / 13volt' setting on your receiver , rotate your Zinwell within the fixed polo pipe until maximum performance is achieved and make markings on the barrel/lnbf joint point with a 'RHC' marking. Then select a LHC signal from 40.5West , select 'H / 17volt' setting on your receiver, rotate your Zinwell 90 deg in the opposite direction and tweak for best performance and again make a 'LHC' marking on your barrel/lnbf joint position. Additional fine tuning of focal point / scalar ring position / how far to insert the lnbf into the polo pipe etc to be done finally.
** For Linear signals - use another satellite , say 55West, and repeat the process as before, marking the 'H' position on the barrel and the same for the 'V' position.

 

[moonbase]

thanks guys!

theres a lot of factors involved here...i.e where to place the polo pipe exactly on the LNB bracket (i.e how far away or how close to the dish should it be), does the pipe need rotating to peak gain, or only the LNB within the pipe? then theres the scalar hood , where to place that.

also, what happens on satellites that use linear? does the polo pipe "work it out"

its good to have these options of course, just adds to the tweaking time.

As 40.5W is circular polarity you should not need to rotate the pipe to get the signal peaked. The critical positioning for the pipe and the LNBF is the orientation of the LNBF twin probes with respect to the steps in the pipe.
The method I used was to imagine a line between the internal steps on opposite sides of the pipe and get this line to bisect the 90 degree angle that the twin probes are disposed at.

The method outlined above by @John is more accurate as it measures actual field values, the bisection method is more theoretical and may need fine tune adjustments.

 

[scopus]

thanks guys!

theres a lot of factors involved here...i.e where to place the polo pipe exactly on the LNB bracket (i.e how far away or how close to the dish should it be), does the pipe need rotating to peak gain, or only the LNB within the pipe? then theres the scalar hood , where to place that.

also, what happens on satellites that use linear? does the polo pipe "work it out"

its good to have these options of course, just adds to the tweaking time.

These pictures may help you. This is my setup on the LNB changer. One thing, you will have to do is shim off some of the polo pipe to accommodate setting the conical scalar, when supplied there us nowhere near enough shimmed off to adjust the scalar plate. It's taken me weeks of tweaking to get mine just right. Just blindscanned 40W and got 192 TV channels.

 

[John]

These pictures may help you. This is my setup on the LNB changer. One thing, you will have to do is shim off some of the polo pipe to accommodate setting the conical scalar, when supplied there us nowhere near enough shimmed off to adjust the scalar plate. It's taken me weeks of tweaking to get mine just right. Just blindscanned 40W and got 192 TV channels.View attachment 144649View attachment 144650View attachment 144651View attachment 144652

.. nice helpful pictures there 'maboy , they really do help people to grasp extra useful install ideas.

 

[suedschwede]

Current blind scan today

 

[stephan94]

Blindscan, but with a 1.80m antenna

 

[Manikm909]

i was getting FS1-2-3 at 9.8 db last night, 246 channels - but NO ESPN
this was using a chinese cheapie with 5g filtering with a chopping board plate - I might be able to squeeze some more wiht polo pipe

 

[nelson_b]

i was getting FS1-2-3 at 9.8 db last night, 246 channels - but NO ESPN
this was using a chinese cheapie with 5g filtering with a chopping board plate - I might be able to squeeze some more wiht polo pipe

Hi -
Is that in the C above k/u position ?

 

[nelson_b]

I,v been playing with AV-com / polo pipe on the 2.4 c.m. today ... and at least i,m getting locks on the two tricky sports transponders using l.n.bf,s with it this time - (something i could not achieve with the 1.8 c.m.) ..... The AV-Com is good once the optimum settings are found for it - position - scalar - and l.n.b. depth .....

Something i,v noted with the AV-Com is differences with different l.n.b brands on it .... The Titanium was the most stable and gave good signals on both sports transponders with only a small depth adjustment between the two - so a compromise could be reached , losing a little bit of strength from each ....

A couple of others i tried were similar, but with a wider depth setting difference and so not a very good margin when a compromise was reached

The Zinwell will lock both transponders quite nicely - but with widely different depth settings, so no compromise there (lock one - lose the other ) ...

My trusty BSC however will lock ESPN nicely once peaked .... but stubbornly remains 1.5 db under lock on FS123 no matter where it is positioned - .... not the first time i,v had issues with the BSC /AV-Com combination - there is a thread i started on the forum somewhere in the distant past about this combination not seeing certain random frequencies ?

Again, as with my tinkering on the 1.8 the other week the best result was with the Gardiner single polarity - block l.n.b. +feed but it still had to have a small depth compromise but held both sports transponders with a good margin

As mentioned by various members in posts 265 - 270 , it seems the way to get the "very best" from an AV-Com / PoloPipe - on weak /borderline signals is with a mechanical remotely controlled l.n.b. depth adjuster. :-)

 

[Manikm909]

Hi -
Is that in the C above k/u position ?

Yes mate

 

[Manikm909]

For those of you that can get ESPN ....what's channel or TP is a just slightly lower signal. I will try aiming for that ...

 

[moonbase]

For those of you that can get ESPN ....what's channel or TP is a just slightly lower signal. I will try aiming for that ...

The FEC also plays a part in the level of signal required for a lock.
For example, using 8.5dB as a benchmark.

An 8PSK signal with FEC of 3/4 will lock with 8.5dB.
An 8PSK signal with FEC of 5/6 will not lock with 8.5dB.

For a comparison with ESPN, you need a frequency with 8PSK modulation and FEC of 5/6, if ESPN is still using FEC of 5/6.

 

[Manikm909]

I just stuck the zinwell into the polo, got another 1db over cheapie Chinese onc AMC BRAZIL at 11.5db but I get the interference. Woe is me .

 

[moonbase]

I just stuck the zinwell into the polo, got another 1db over cheapie Chinese onc AMC BRAZIL at 11.5db but I get the interference. Woe is me .

Is shortening the barrel of the cheapie Chinese LNBF an option, make it the same distance from the end of the barrel to the internal probes as the Zinwell and try it in the polo?
If shortening is an option you could do it in stages, cutting sections away and testing after each cut?

I bought a cheapo Evolution mitre saw reconditioned from eBay for jobs like this.
As well as using for wood, it makes short work of box section and steel plate etc, it slices through an LNBF with a nice clean vertical cut in seconds.

 

[Manikm909]

Just removed polo . Back to 11db on AMC BRAZIL with chopping board plate. But yes deffo option as I bought two. Only have a hack saw tho. Part of me wonders if it's worth cutting down tho cos it goes into the polo just as much I think

 

[Manikm909]

Omg I've just locked it. ESPN
Breaking up tho

 

[Manikm909]

Omg I've just locked it. ESPN
Breaking up tho

my STB still shows it as FEC 3/4 - something else must have changed since April, or someones nudged the sat out of alignment in space.

 

[amdade]

Mine says 5/6 ... (remember plate reversed )

 

[Manikm909]

Mine says 3/4