African Satellite World and Sat Gear

[kungu1]

What's the price of a 1.2m offset dish in luthuli Avenue?

As per info, the price is ranging between 5000 to 6000Ksh in Luthuli.

 

[kungu1]

hi am new here whats the difference between an offset and prime focus dish?

Welcome onboard

Prime Focus Dishes, the signal reflects from the satellite dish and concentrates towards the center, where the LNB is mounted to catch the signal.

Prime Focus dish are mainly used for C-Band reception but can still be used for Ku-band with some limitations.

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Offset Dishes are designed with an offset angle. Usually set at 21-degrees. With this design, the signal reflects from the dish and concentrates towards the bottom of the satellite dish instead of the center of the satellite dish.

Offset Dishes work best in Ku Band reception as in the case of DSTV in Africa.
The offset dish can also be used on C-band reception but also with some limitation.

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[tyjos]

As per info, the price is ranging between 5000 to 6000Ksh in Luthuli.

Thanks

 

[tyjos]

Mr. Kungu, which receiver (between strong srt 4922HD & srt 4950H) would you recommend to a newbie?

 

[gaza man]

lnb type?

im using supermax lnb (3.4-4.2GHz) freq input . even with single solution it does more perfect

 

[Northumberland]

Just to add to Kungu's excellent explanation, the Prime Focus Dish is a a perfect parabola, and focusses the beam to the centre. The offset dish is actually a section of a much larger parabola.

One major advantage of the offset dish is that the LNB does not shade the signal from the dish, unlike with a Prime Focus dish.

The practical thing to note is that when you look up the angle of elevation for given satellite, with a Prime Focus dish, that is the exact angle you set your dish to. But with an offset dish, you have to subtract the offset angle from the desired angle of elevation.

When aiming an offset dish, remember that the 'beam' of radiation coming from the satellite is actually coming in at a higher angle than it would seem, thus, although you might think that your offset dish is pointing to a wall or a tree, stopping reception, in actual fact the beam will come in 21 degrees or so higher, so might miss the obstruction!

 

[Kibukila]

In one of the SRT 4922 specs it is written "USB 2.0 Host for Wi-Fi Adaptor" how can I connect the USB Adaptor to make the receiver pick the wifi network?

 

[Northumberland]

In one of the SRT 4922 specs it is written "USB 2.0 Host for Wi-Fi Adaptor" how can I connect the USB Adaptor to make the receiver pick the wifi network?

You just plug a USB Wi Fi Adapter, a tiny little thing that you can buy, in to the USB port, and then select from the menu settings. However, I have tried this repeatedly with my SR 4922, and I have a good home wi-fi network, but I have never been able to get it to work! I would be interested in your experience!

 

[tyjos]

Sat gurus, which receiver (between strong srt
4922HD & srt 4950H) would you recommend
to a newbie?

 

[mah-mah123]

Sat gurus, which receiver (between strong srt
4922HD & srt 4950H) would you recommend
to a newbie?

either will do?performance of both is good.

however, if u r interested in the europe beam signal on satellite 7E then go for 4922hd.
the remote for 4922hd is not as good as that for 4950h

 

[Lunsat2]

My motorised set up consists of a 1.35cm offset dish, Fuji single LNB, superjack HH motor and srt 4930 stb.

I have had this for about a year now and what used to annoy me was when I choose a channel and the dish stops short of the sat and the no signal box appears on my screen . I go to motorised settings and press the move fine button once on the remote and the stb locks on to the sat. I always used to wonder, why isnt this thing more accurate?

Recently I found that the inaccuracy is due to a bolt on the arm of the motor, the one where you need an allan key, that I was not tying properly.(see the bolt in the diagram). Either I hadn't tightened it enough or I tightened it enough when it was not in the right place; in both cases the dish ended up having some play which made it inaccurate when it moves. After I found the right way to tighten the bolt the motor is now incredibly accurate. For me this was the problem because all the other things involved in dish alignment which I wont discuss here were in order.

I have tuned the sytem for each sat to the highest possible signal quality I could and I have found that the dish is now able to locate that exact point even when moving from one end of the arc to the other. I am now using this accuracy under motorised settings to locate sats whose TPs I dont know. I have found that one press of the Move button on the remote control is equal to one degree on the arc, and three presses of the Move Fine button also is equal to one degree on the arc. Half a degree is equal to two presses of the move fine button. Less than half a degree I round down to zero;Greater than half a degree I round up to one.

Thus If I am at sat A which is green and I want to locate sat B whose TP I dont know I just do maths to find how many degrees apart the two sats are and I multiply that by the equivalent number of clicks as defined above and the answer is the number of clicks of the remote I need to press in order to move the dish from sat A to sat B. Example: to move from 36E to 28E: 36-28=8 degrees, 8egrees x 3 clicks = 24 click. Meaning 24 Move Fine clicks will get me to Astra 2f position. I blind scan that location and hay presto my screen is all green. I have verified this method again and again and it has passed with flying colors, except where my dish is too small to lock on to a particular sat.

Have a good weekend.

 

[limuru]

Good Afternoon ruffcast,

I am using a 1.6 meter offset dish plus samson twin ku lnb but to get all the tp,s of Digitruk, i use the 2.4 offset.

With a 1.2 offset i can get the 3 lower frequencies on Eutelsat 7 East A Europe B footprint ( 10721 H & 10721 V & 10762 V)

Haven't tried out the Inverto Prime focus ku lnb yet.


Try your offset dish to see if you can get the said frequencies on the Europe B footprint

sure.. I tried 7a with a 120cm and was only able to nab the three frequencies

 

[esuo2]

hi all
@ bro kungu
please am in Ghana west africa and Im very interested in the Eutelsat 7a Europe B beam...I just hobby about tracking fringe reception with my 2.4M prime focus dish and my modified Lnb which i posted here on this forum
my question is what are my chances of 7e here in Ghana with 2.4M pf dish....if possible whats the best tp to use
Similarly am also interested in tracking yahsat...here,if possible whats the best tp to use KUNGU I would like to try the samson two way lnd here in Ghana,heard so much about it but its not available here in ghana,please Pm me on how i can get one please
thanks and have a good evening...

 

[staddos]

My motorised set up consists of a 1.35cm offset dish, Fuji single LNB, superjack HH motor and srt 4930 stb.

I have had this for about a year now and what used to annoy me was when I choose a channel and the dish stops short of the sat and the no signal box appears on my screen . I go to motorised settings and press the move fine button once on the remote and the stb locks on to the sat. I always used to wonder, why isnt this thing more accurate?

Recently I found that the inaccuracy is due to a bolt on the arm of the motor, the one where you need an allan key, that I was not tying properly.(see the bolt in the diagram). Either I hadn't tightened it enough or I tightened it enough when it was not in the right place; in both cases the dish ended up having some play which made it inaccurate when it moves. After I found the right way to tighten the bolt the motor is now incredibly accurate. For me this was the problem because all the other things involved in dish alignment which I wont discuss here were in order.

I have tuned the sytem for each sat to the highest possible signal quality I could and I have found that the dish is now able to locate that exact point even when moving from one end of the arc to the other. I am now using this accuracy under motorised settings to locate sats whose TPs I dont know. I have found that one press of the Move button on the remote control is equal to one degree on the arc, and three presses of the Move Fine button also is equal to one degree on the arc. Half a degree is equal to two presses of the move fine button. Less than half a degree I round down to zero;Greater than half a degree I round up to one.

Thus If I am at sat A which is green and I want to locate sat B whose TP I dont know I just do maths to find how many degrees apart the two sats are and I multiply that by the equivalent number of clicks as defined above and the answer is the number of clicks of the remote I need to press in order to move the dish from sat A to sat B. Example: to move from 36E to 28E: 36-28=8 degrees, 8egrees x 3 clicks = 24 click. Meaning 24 Move Fine clicks will get me to Astra 2f position. I blind scan that location and hay presto my screen is all green. I have verified this method again and again and it has passed with flying colors, except where my dish is too small to lock on to a particular sat.

Have a good weekend.

A good and eye opening piece.Big ups to u LUNSAT, I have the same problem however my set up is a 2.4m PF motorised dish. I use the long superjack actuator which is different from what you posted.Is there any hope for me as far as what you posted is concerned.I cannot find the bolt you spoke about on my type of motor.What does the bolt do on your motor.

 

[dejumbo]

Good Afternoon ruffcast,
I am using a 1.6 meter offset dish plus samson twin ku lnb but to get all the tp,s of Digitruk, i use the 2.4 offset.
With a 1.2 offset i can get the 3 lower frequencies on Eutelsat 7 East A Europe B footprint ( 10721 H & 10721 V & 10762 V)
Haven't tried out the Inverto Prime focus ku lnb yet.
Try your offset dish to see if you can get the said frequencies on the Europe B footprint

Here in Kampala I am using a segmented solid 2.4m PF dish with a WizTech PF LNB (see picture) and SRT 4922 stb
for DigiTurk channels on Eutelsat 7A at 7.0° East Europe B beam. I however noticed that the signal can be further
improved by removing the orange/white cover to reveal a flat scaler. I covered the throat entrance with a small
transparent paper of the type that usually covers the outer CD casing of a new blank CD. This WizTech LNB is
widely available in Kampala at abbout 30K (UGX) particularly at Master Electronics on Bombo Road and also Noor
Electronics on the same street but further ahead towards Wandegeya opposite YMCA.
With this setup I am able to receive the following tps on the Europe B beam:
10721 H, 10722 V, 10762 V, plus DigiTurk tps: 10803 V, 10845 V, 10928 H, 11471 H, 11513 H, 11554 H, 11596 H, 11637 H, 11679 H.
I however failed to get the following DigiTurk tps: 11455 V, 11492 V, 11534 V, 11575 V, and especially 11617 V.
I now believe that an offset dish of the same size (2.4m.) can bring down all the DigiTurk tps here in Kampala.

 

[rtuwey]

Here in Kampala I am using a segmented solid 2.4m PF dish with a WizTech PF LNB (see picture) and SRT 4922 stb
for DigiTurk channels on Eutelsat 7A at 7.0° East Europe B beam. I however noticed that the signal can be further
improved by removing the orange/white cover to reveal a flat scaler. I covered the throat entrance with a small
transparent paper of the type that usually covers the outer CD casing of a new blank CD. This WizTech LNB is
widely available in Kampala at abbout 30K (UGX) particularly at Master Electronics on Bombo Road and also Noor
Electronics on the same street but further ahead towards Wandegeya opposite YMCA.
With this setup I am able to receive the following tps on the Europe B beam:
10721 H, 10722 V, 10762 V, plus DigiTurk tps: 10803 V, 10845 V, 10928 H, 11471 H, 11513 H, 11554 H, 11596 H, 11637 H, 11679 H.
I however failed to get the following DigiTurk tps: 11455 V, 11492 V, 11534 V, 11575 V, and especially 11617 V.
I now believe that an offset dish of the same size (2.4m.) can bring down all the DigiTurk tps here in Kampala.

I have the same Wiztech LNB but it performed much poorly compared to all the rest i have. Maybe with a Fuji you could nab the other TPs.

 

[Vince9]

Hi Gurus in the house, I am currently enjoying Nilesat 7 degrees west ON 90cm offset from Kampala with over 600 channels. I want to attemp the Europe B footprint on Eutelsat 7A. My question is, would a 130cm offset do the job for me? i already have my srt 4922 decorder patched. Thanks in advance.

 

[Lunsat2]

A good and eye opening piece.Big ups to u LUNSAT, I have the same problem however my set up is a 2.4m PF motorised dish. I use the long superjack actuator which is different from what you posted.Is there any hope for me as far as what you posted is concerned.I cannot find the bolt you spoke about on my type of motor.What does the bolt do on your motor.

That bolt is only found on HH motors. There is a four corner revolving steel metal which comes from the motor which goes inside the aluminium arm on which the dish is fixed. the bolt holds the aluminium arm and the steel metal together and if there is ply there then the dish loses accuracy.

I used to have the long jack as well when I had a motorised 1.8m prime focus dish. The secret of accuracy for that system is when the mount is being fabricated. All the holes where bolts are fixed should be just big enough for the bolts to squeez through. If they are too big compared to the bolts then there will be play resulting in unwanted dish movement. Also when bolts are fixed they should be well tightened so that the whole system is rigid even when wind blows. Any flexibility should be from metal elasticity or from the intended moving parts not from looseness in the bolts and connections. If these things are taken care of, the system will be very accurate.

 

[dejumbo]

I have the same Wiztech LNB but it performed much poorly compared to all the rest i have. Maybe with a Fuji you could nab the other TPs.

For me the Fuji performed very poorly compared to WizTech. I will try the Fuji Stargold and I am trying to get Inverto
flange type LNB for PF dishes. Actually a number of friends around here have all used WizTech with very good results on
Eutelsat 7A at 7.0° East Europe B beam especially those with properly assembled brand new 2.4m PF dishes. My 2.4m
dish is probably 4th hand and has some few defects otherwise I would get even better results. For now my focus is
to acquire 1.8m and above offset dishes to quench my ASAS addiction.

 

[mtuko2]

azam live and clear at my end