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C Band equipment from the Satellite Superstore UK. C Band LNB 13K, C band voltage switching LNBs, C band and Ku band LNBs. Offset C Band feedhorns. Prime focus C Band feedhorns. Twin C Band LNBs, Voltage switching C Band LNB. Twin C Band voltage switching LNB. C band 13C block type LNB. C band and Ku band voltage switching LNB. C Band Advice.
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C Band, S Band, C & Ku band combo, LNBFs, LNBs, feedhorns
Voltage switching * C band & Ku band LNB single C Band LNB twin C Band LNB quad C Band LNB * C Band Menu Page.
C Band professional block type LNB C Band professional dual polarity feedhorn C Band prime focus feedhorn support boss
C Band single polarity feedhorn Dielectric plates C Band offset feedhorn flared horn & feed support boss S Band block type LNB
Twin C and Ku Band "Combo" voltage switching LNBF

C band and Ku band voltage switching LNB with feedhorn. C band and Ku band voltage switching LNB with feedhorn.

C Band voltage switching LNB with feedhorn. C band and Ku band voltage switching LNB with feedhorn.

Super high gain - 70dBs. - Very low noise - 13K.
This unit has three outputs, two for C Band and one for Ku band. These outputs can be arranged in two configurations -
1. They can be treated as three separate outputs. They could be switched with a (e.g.) 12 volt switch down one cable
or they could come down three cables, being kept separate, to two or three receivers. The Ku band LNB is a universal LNB.
2. Using an external 2 way diseqc switch a modern receiver can switch between C band and Ku band. There are two
feedhorn / LNB options, one for prime focus dishes and one for offset dishes. The offset option includes an
offset feed support boss.
This is for linear and circular polarisation. Also available is a feed support boss for prime focus dishes. If your dish
has 3 arms and you need a 60mm feed support boss to hold the C band LNB this is also available only with our c band LNBs.
Technical - Integrated voltage switching C band LNB and feedhorn. 3.4 to 4.2 GHz, 13K, Cross Polar isolation 20dB (min)
Image rejection 45dB (min, Phase noise -85dB at 10KHz, LO frequency 5150MHz, LO stability + or - 1.5MHz) Scalar ring prime
focus feedhorn or flared offset feedhorn KU band universal LNB 10700 to 12750 GHx. 0.2dB Ku band universal LNB
There are two feedhorn / LNB options. To find out what a prime focus dish is click here
A Dielectric plate is included for both linear and circular polarisation.
A 1.8m prime focus dish with C Band LNB option is available from the motorised dishes page.
The offset version of this LNB/feedhorn kit includes a feed support boss. This should fit easily
onto a rectangular section feed support arm. The Gibertini 1.5m dish would be an
example of a dish this kit should adapt to quite easily.

Shipping options. Discounted shipping on all web orders. (VAT info.) (Stock levels.)
Free UK delivery by courier (includes offshore islands by special delivery) so choose,
"Free UK delivery" - UK shipping option No 1 (or priority options 4-7).
International - Republic of Ireland - choose the £15 "fixed price multiple items to Eire" shipping option
International - within the EU - choose the £38 "up to 5Kg by courier to EU countries" shipping option
International - outside of the EU - choose the "International shipping quote by e-mail" shipping option.
Please note, although not guaranteed, many 1-3 day standard UK deliveries are actually arriving next day if the order
is received before our cut-off times but there is also a next day priority delivery option at only £6.50 if required.

Prime Focus Feed - Twin C and single Ku Band (universal) voltage switching LNBF.
Order Code PR300CL
£159.95

Prime Focus Feed - Twin C and single Ku Band (universal) voltage switching LNBF
with
feed support boss.
Order Code PR300CLS
£194.95

Offset Feed - Twin C and single Ku Band (universal) voltage switching LNBF.
This kit comes with the offset feedhorn kit and includes an offset feed support boss which fits most offset dishes.
Order Code PR300CLO
£189.95



C and Ku Band (universal) "Combo" voltage switching LNBF

C band and Ku band voltage switching LNB with feedhorn. C band and Ku band voltage switching LNB with feedhorn.

C Band voltage switching LNB with feedhorn. C band and Ku band voltage switching LNB with feedhorn.

Super high gain - 70dBs. - Very low noise - 13K.
This unit has two outputs, one for C Band and one for Ku band. These outputs can be arranged in two configurations -
1. They can be treated as two separate outputs. They could be switched with a (e.g.) 12 volt switch down one cable
or they could come down twin cable, being kept separate, to two receivers. The Ku band LNB is a universal LNB.
2. Using an external 2 way diseqc switch a modern receiver can switch between C band and Ku band. There are two
feedhorn / LNB options, one for prime focus dishes and one for offset dishes. The offset option includes an
offset feed support boss.
This is for linear and circular polarisation. Also available is a feed support boss for prime focus dishes. If your dish
has 3 arms and you need a 60mm feed support boss to hold the C band LNB this is also available only with our c band LNBs.
Technical - Integrated voltage switching C band LNB and feedhorn. 3.4 to 4.2 GHz, 13K, Cross Polar isolation 20dB (min)
Image rejection 45dB (min, Phase noise -85dB at 10KHz, LO frequency 5150MHz, LO stability + or - 1.5MHz) Scalar ring prime
focus feedhorn or flared offset feedhorn KU band universal LNB 10700 to 12750 GHx. 0.2dB Ku band universal LNB
There are two feedhorn / LNB options. To find out what a prime focus dish is click here
A Dielectric plate is included for both linear and circular polarisation.
A 1.8m prime focus dish with C Band LNB option is available from the motorised dishes page.
The offset version of this LNB/feedhorn kit includes a feed support boss. This should fit easily
onto a rectangular section feed support arm. The Gibertini 1.5m dish would be an
example of a dish this kit should adapt to quite easily.

Shipping options. Discounted shipping on all web orders. (VAT info.) (Stock levels.)
Free UK delivery by courier (includes offshore islands by special delivery) so choose,
"Free UK delivery" - UK shipping option No 1 (or priority options 4-7).
International - Republic of Ireland - choose the £15 "fixed price multiple items to Eire" shipping option
International - within the EU - choose the £38 "up to 5Kg by courier to EU countries" shipping option
International - outside of the EU - choose the "International shipping quote by e-mail" shipping option.
Please note, although not guaranteed, many 1-3 day standard UK deliveries are actually arriving next day if the order
is received before our cut-off times but there is also a next day priority delivery option at only £6.50 if required.

Prime Focus Feed - single C and single Ku Band (universal) voltage switching LNBF.
In stock and ready for immediate shipping.
Order Code CKULNBP
£119.95

Prime Focus Feed - C and Ku Band (universal) voltage switching LNBF.
with
feed support boss.
In stock and ready for immediate shipping.
Order Code CKULNBPF
£144.90

Offset Feed - C and Ku Band (universal) voltage switching LNBF.
This kit comes with the offset feedhorn kit and includes an offset feed support boss which fits most offset dishes.
In stock and ready for immediate shipping.
Order Code CKULNBO
£149.95



Single C Band voltage switching 13K LNBF

C Band voltage switching LNB with feedhorn. C Band voltage switching LNB with feedhorn..

C Band voltage switching LNB with feedhorn. C Band voltage switching LNB with feedhorn.

Super high gain - 70dBs. - Very low noise - 13K.
Very low noise - 13K. Voltage switching LNB with feedhorn.
A Dielectric plate is included. For linear and circular polarisation. There are two feedhorn / LNB options,
one for prime focus dishes and one for offset dishes. Also available is a feed support boss for prime focus
dishes. If your dish has 3 arms and you need a 60mm feed support boss to hold the C band LNB this is
also available only with our C band LNBs. The offset option includes an offset feed support boss.
Technical - One C Band output. Integrated voltage switching C band LNB and feedhorn. 3.4 to 4.2 GHz, 13K, Cross
Polar isolation 20dB (min) Image rejection 45dB (min, Phase noise -85dB at 10KHz, LO frequency 5150MHz,
LO stability + or - 1.5MHz) Scalar ring prime focus feedhorn or flared offset feedhorn options
There are two feedhorn / LNB options. To find out what a prime focus dish is click here
A 1.8m prime focus dish with C Band LNB option is available from the motorised dishes page.
The offset version of this LNB/feedhorn kit includes a feed support boss. This should fit easily
onto a rectangular section feed support arm. The Gibertini 1.5m dish would be an
example of a dish this kit should adapt to quite easily.

Shipping options. Discounted shipping on all web orders. (VAT info.) (Stock levels.)
Small items by post - Free UK delivery (includes offshore islands) on all orders over £10 - so choose,
"UK - small items - free delivery." (Includes UK offshore islands) - UK shipping option No 3.
All Internationals - EU or outside of the EU - choose the £15 "up to 1.5 Kg by insured international post." shipping option.

Prime Focus Feed - Single C Band voltage switching 13K LNBF
In stock and ready for immediate shipping.
Order Code CBD13KP
Only £69.95

Prime Focus Feed - Single C Band voltage switching 13K LNBF
with
feed support boss.
In stock and ready for immediate shipping.
Order Code CBD13KPF
£105.90

Offset Feed - Single C Band voltage switching 13K LNBF
This kit comes with the offset feedhorn kit and includes an offset feed support boss which fits most offset dishes.
Order Code CBD13KO
In stock and ready for immediate shipping.
£99.95



Twin C Band voltage switching 13K LNBF

Twin C Band voltage switching LNB with feedhorn. Twin C Band voltage switching LNB with feedhorn.

C Band voltage switching LNB with feedhorn. C band and Ku band voltage switching LNB with feedhorn.

Super high gain - 70dBs. - Very low noise - 13K.
Both outputs 13K. C Band LNB Voltage switching LNB with feedhorn options. 3.4 to 4.2 GHz
A Dielectric plate is included. For linear and circular polarisation. There are two feedhorn / LNB options,
one for prime focus dishes and one for Also available is a feed support boss for prime focus dishes. If your
dish has 3 arms and you need a 60mm feed support boss to hold the C band LNB this is also available only
with our c band LNBs. The offset option includes an offset feed support boss.
Technical - Two C Band output. Integrated voltage switching C band LNB and feedhorn. 3.4 to 4.2 GHz, 13K, Cross
Polar isolation 20dB (min). Image rejection 45dB (min, Phase noise -85dB at 10KHz, LO frequency 5150MHz, LO
stability + or - 1.5MHz) Scalar ring prime focus feedhorn or flared offset feedhorn.
A 1.8m prime focus dish with C Band LNB option is available from the motorised dishes page.
To find out what a prime focus dish is click here
The offset version of this LNB/feedhorn kit includes a feed support boss. This should fit easily
onto a rectangular section feed support arm. The Gibertini 1.5m dish would be an
example of a dish this kit should adapt to quite easily.

Shipping options. Discounted shipping on all web orders. (VAT info.) (Stock levels.)
Small items by post - Free UK delivery (includes offshore islands) on all orders over £10 - so choose,
"UK - small items - free delivery." (Includes UK offshore islands) - UK shipping option No 3.
All Internationals - EU or outside of the EU - choose the £15 "up to 1.5 Kg by insured international post." shipping option.

Prime Focus Feed - Twin C Band voltage switching 13K LNBF.
Order Code TWINCBP
In stock and ready for immediate shipping.
£79.95

Prime Focus Feed - Twin C Band voltage switching 13K LNBF with feed support boss.
In stock and ready for immediate shipping.
Order Code TWINCBPF
£114.95

Offset Feed - Twin C Band voltage switching 13K LNBF.
This kit comes with the offset feedhorn kit and includes an offset feed support boss which fits most offset dishes.
In stock and ready for immediate shipping.
Order Code TWINCBO
£109.90



Quad C Band voltage switching 13K LNBF

Quad C Band voltage switching LNB with feedhorn. Quad C Band voltage switching LNB with feedhorn.

C Band voltage switching LNB with feedhorn. C band and Ku band voltage switching LNB with feedhorn.

Super high gain - 70dBs. - Very low noise - 13K.
4 outputs 13K. C Band LNB Voltage switching LNB with feedhorn options. 3.4 to 4.2 GHz
A Dielectric plate is included. For linear and circular polarisation. There are two feedhorn / LNB options,
one for prime focus dishes and one for Also available is a feed support boss for prime focus dishes. If your
dish has 3 arms and you need a 60mm feed support boss to hold the C band LNB this is also available only
with our c band LNBs. The offset option includes an offset feed support boss.
Technical - Four C Band output. Integrated voltage switching C band LNB and feedhorn. 3.4 to 4.2 GHz, 13K, Cross
Polar isolation 20dB (min). Image rejection 45dB (min, Phase noise -85dB at 10KHz, LO frequency 5150MHz, LO
stability + or - 1.5MHz) Scalar ring prime focus feedhorn or flared offset feedhorn.
A 1.8m prime focus dish with C Band LNB option is available from the motorised dishes page.
To find out what a prime focus dish is click here
The offset version of this LNB/feedhorn kit includes a feed support boss. This should fit easily
onto a rectangular section feed support arm. The Gibertini 1.5m dish would be an
example of a dish this kit should adapt to quite easily.

Shipping options. Discounted shipping on all web orders. (VAT info.) (Stock levels.)
Small items by post - Free UK delivery (includes offshore islands) on all orders over £10 - so choose,
"UK - small items - free delivery." (Includes UK offshore islands) - UK shipping option No 3.
All Internationals - EU or outside of the EU - choose the £15 "up to 1.5 Kg by insured international post." shipping option.

Prime Focus Feed - Quad C Band voltage switching 13K LNBF.
In stock and ready for immediate shipping.
Order Code QUADCBP
£89.95

Prime Focus Feed - Quad C Band voltage switching 13K LNBF with feed support boss.
In stock and ready for immediate shipping.
Order Code QUADCBPF
£124.90

Offset Feed - Quad C Band voltage switching 13K LNBF.
This kit comes with the offset feedhorn kit and includes an offset feed support boss which fits most offset dishes.
In stock and ready for immediate shipping.
Order Code QUADCBO
£119.95



New product. Primesat C Band professional
CPR229 flange block type LNB. PR100C 13K


C Band CPR229 flange block type LNB C Band CPR229 flange block type LNB C Band CPR229 flange block type LNB

Very low noise - 13K.
Designed to fit an a Co-Rotor or C Band dual polarity feedhorn or C Band single polarity feedhorn. CPR229 flange.
Input Frequency: 3.4 - 4.2GHz, Output Frequency: 950 - 1750MHz.
Polarity: 1 (Horizontal or Vertical.) LO Frequency: 5150MHz,
Connector: F-Female, HDTV Approved.

Shipping options. Discounted shipping on all web orders. (VAT info.) (Stock levels.)
Small items by post - Free UK delivery (includes offshore islands) on all orders over £10 - so choose,
"UK - small items - free delivery." (Includes UK offshore islands) - UK shipping option No 3.
All Internationals - EU or outside of the EU - choose the £15 "up to 1.5 Kg by insured international post." shipping option.
All Internationals - EU or outside of the EU - choose the £38 by fast courier shipping option.

One Primesat C Band professional CPR229 flange block type LNB. PR100C. 13K
Order Code PR100CL
Only £59.95

Two Primesat C Band professional CPR229 flange block type LNBs. PR100C. 13K
Order Code 2PR100CL
Only £99.95



C Band offset feedhorn with
feed support boss.


C Band offset feedhorn with feed support boss

C Band offset feedhorn with feed support boss C Band offset feedhorn with feed support boss

This is an offset feedhorn and it will allow C Band voltage switching LNBs to be fitted to offset dishes. The feed support boss
is designed to take a 60mm LNB neck. Most C Band LNBs use a 60mm neck. The boss can be fitted to the satellite dish feed
support arm. It may be necessary to modify the end of the dish arm to fit this boss. One bolt is used to fit this feed
support boss to the arm and so a hole may need to be drilled through the arm. If there is a single arm, or side support
arms are connected to the main arm further down the arm and there is only a single arm tube at the end,
(e.g. a Gibertini dish) fitting this support boss should be easy. If three arms all converge right at the end
(e.g. a Raven dish), the modification would be more difficult.

Discounted oprice when you buy the feedhorn and LNB together.
Shipping options. Discounted shipping on all web orders. (VAT info.) (Stock levels.)
Small items by post - Free UK delivery (includes offshore islands) on all orders over £10 - so choose,
"UK - small items - free delivery." (Includes UK offshore islands) - UK shipping option No 3.
All Internationals - EU or outside of the EU - choose the £15 "up to 1.5 Kg by insured international post." shipping option.

C Band offset feedhorn with feed support boss.
In stock and ready for immediate shipping.
Order Code CBOFFFB
Only £44.95



Primesat feed support boss (No 2) for
the 60mm necks of C Band LNBs.


C Band LNB with feed support boss C Band LNB with feed support boss

C Band LNB with feed support boss C Band LNB with feed support boss

Feed support boss only. Feedhorn / LNB not included. The Primesat feed support boss (No 2) has longer bolts
for 60mm necks. If your prime focus dish has a Ku band feed support boss and will not adjust to a
60mm neck, this option is available. The 3 arms can be bolted to this feed support boss
and the C Band LNB will then fit. The support boss has two angles to choose from as far as interfacing
with the rods on your dish. Usually the shallower angle holes would be used with larger dishes. With
this support boss, a c band feedhorn can be fitted any prime focus dish that uses 3 arms although
the bolts at the ends of the rods may need to be altered to suit the size of the holes in the boss.

Shipping options. Discounted shipping on all web orders. (VAT info.) (Stock levels.)
Small items by post - Free UK delivery (includes offshore islands) on all orders over £10 - so choose,
"UK - small items - free delivery." (Includes UK offshore islands) - UK shipping option No 3.
All Internationals - EU or outside of the EU - choose the £15 "up to 1.5 Kg by insured international post." shipping option.

Primesat feed support boss (No 2) for the 60mm necks of C Band LNBs.
In stock and ready for immediate shipping.
Order Code PRFEED2
Only £34.95



Dielectric plates.

Dielectric plates. Dielectric plates.

Dielectric plates can be fitted in the throat of the feedhorn. They are 60mm long and that is the diameter of the circular
waveguide which forms the inside of the C Band feedhorn. Once fitted they can convert circular polarisation to linear
polarisation. If the satellite transponders are only transmitting vertically and horizontally polarised signals
(that is linear polarisation), the dielectric plate is not needed. Indeed it can be an advantage to leave it out as
it can increase insertion losses, however, if the satellite is transmitting circular polarised signals, (clockwise
and anti-clockwise), the dielectric plate is needed. The circular polarised signal are converted to linear polarised
signals and so the internal sensing transducer will then detect the signal correctly. If the satellite is transmitting
both linear and circular polarised signals, if the dielectric plate is correctly positioned within the feedhorn, the
linear polarised signals will pass through and the circular polarised signals will be converted. All of our C Band
LNBFs and C Band feedhorns have a dielectric plate included but customers may wish to buy them separately.

Shipping options. Discounted shipping on all web orders. (VAT info.) (Stock levels.)
Small items by post - Free UK delivery (includes offshore islands) on all orders over £10 - so choose,
"UK - small items - free delivery." (Includes UK offshore islands) - UK shipping option No 3.
Under £10 there are other shipping options but not free delivery.
All Internationals - EU or outside of the EU - choose the £15 "up to 1.5 Kg by insured international post." shipping option.

One dielectric plate.
Order Code 1DPLATE
Only £2.95

Ten dielectric plates.
Order Code 10DPLATE
Only £19.95



S Band block type LNBs for projects.

S band block type LNB for projects.

S Band is a reception frequency range which is often used by satellite enthusiasts looking for feeds and programs which
are not normally available to the public. They may be looking for some of the more unusual broadcast feeds. Here satellite
is a hobby rather than just for direct to home TV channels. This professional S Band LNB is ideal for this type of
interesting research. In the early days of satellite, (1985 - mid 1990s) there were many satellite enthusiasts.
Sadly there are not as many these days but some are still very active on both C Band and S band.
Specifications - Type 1 - Input Frequency 2.3 to 2.9GHz with LO frequency 3750,Type 2 - 2.2 to 2.7Ghz with LO frequency 3850.
Output Frequencies - 950 to 1350 MHz, 1050 to 1550 MHz, 1050 to 1650 MHz. L.O. Stability ±1.5MHz(-40°Cto+70/25°C)
Noise Figure 0.4dB. Conversion Gain 55dB. Input VSWR 2.0:1 Output VSWR 2.0:1 Output F connector. Supply Voltage 12v-24v
Output Impedance 75ohms Image Rejection 45dB. Phase Noise -95dBc/Hz@100kHz(max), 75dBc/Hz@10kHz(max)

Shipping options. Discounted shipping on all web orders. (VAT info.) (Stock levels.)
Small items by post - Free UK delivery (includes offshore islands) on all orders over £10 - so choose,
"UK - small items - free delivery." (Includes UK offshore islands) - UK shipping option No 3.
All Internationals - EU or outside of the EU - choose the £15 "up to 1.5 Kg by insured international post." shipping option.

2.3 - 2.9Ghz S Band block type LNB for projects. Type 1
Order Code SBANDT1
Only £99.95

2.2 - 2.7Ghz S Band block type LNB for projects. Type 2
Order Code SBANDT2
Only £99.95



Primesat Dual Polarity C Band feedhorn.

C Band CPR229 flange block type LNB Primesat Dual Polarity C Band feedhorn

C Band CPR229 flange block type LNB Primesat Dual Polarity C Band feedhorn

This exciting "new" product is an "orthomode transducer (OMT) wave guide". It has a high performance as it is a no compromise
approach to dealing with microwaves. It offers a virtually zero insertion loss. That means more good signal reaches the high
quality professional LNBs, each of which only have to deal with one polarity. Let's start at the beginning! Domestic satellite
started in Europe in 1985 but there was a small number of enthusiasts with commercial equipment (the type used by cable
companies) between 1980 and 1985. From 1985 on-wards, Ku band started to be used for direct to home satellite. (DTH).
Orthomode transducer wave guides (ku) were used with block type 11GHz LNBs as shown below in our museum publication
from 1989. Pre 1985, C Band was the band in use and dual polarity waveguides for commercial use were available. Later
on there were ferrite polarisers, mechanical polarisers, triple band LNBs and voltage switching universal LNBFs. This
was not necessarily to improve the quality, it was to improve convenience, cost, packaging sizes, and as far as Ku was
concerned, bandwidth by offering more bands. The Physics, however, does not alter and the wave guide remains supreme.
The unpolarised waves enter the waveguide and are directed to one LNB where only vertical waves emerge from the vertical
rectangular flange. Other waves are directed to the second LNB and here only horizontal waves emerge from the horizontal
flange. The microwaves are polarised by the waveguides physical design. The big advantage in 2015 is in the dedicated
block type LNBs as the latest state of the art electronics means they now have very low noise temperatures. What we have
is a combination of a no compromise professional OMT wave guide and cutting edge LNB technology. The best of the past
meets the best of the present to make a no compromise high performance broadcast quality product. Scalar rings complete
the feedhorn / OMT kit for prime focus dishes and the offset feedhorn adapter kit is availble for offset dishes. If an engineer
can make something with electronics rather than engineering, there are cost savings and compromises. If the Physics
is right and ultimate performance is required, the highly engineered waveguide will always be better. Dual Polarity C Band
feedhorn OMT with CPR229 outputs. Optional - two CPR229 flange C band LNBs incuded. More infomation below.

Primesat Dual Polarity C Band feedhorn with two C Band CPR229 flange block type LNBs
Order Code DPF2LNB
Only £199.85

Primesat Dual Polarity C Band feedhorn only (without LNBs). CPR229 flanges
Order Code DUALPOL
Only £79.95



More information on the Primesat Dual Polarity C Band OMT feedhorn.

Primesat Dual Polarity C Band feedhorn Primesat Dual Polarity C Band feedhorn

There are several ways of dealing with two LNBs, each carrying one polarity. A simple method could be DISEqC switching.
Set up two satellites in a receiver's menu system. Both the same satellite but one for the vertical channels and one for
the horizontal channels. Perhaps a better method would be to use a twin tuner satellite receiver like an Icecrypt s3600
(and others). By making sure ultimate performance has been achieved with an OMT feedhorn, putting the signals through
a DISEqC switch or any other kind of switch can be avoided. Feed the two signals directly into the two inputs of a
twin tuner blind search satellite receiver and sort out the verticals and horizontals in the menus. Again two
identical satellites can be set up with one handling the vertical channels and the other the horizontal channels.
If a motorised dish is being used, every satellite would be duplicated in this way. No doubt there are other
solutions but these suggestions may be worth considering.



Primesat Single Polarity C Band feedhorn.

Primesat Single Polarity C Band feedhorn Primesat Single Polarity C Band feedhorn

C Band single polarity prime focus feedhorn available as feedhorn only or including a high quality block type C Band
LNB. A dielectric plate is included. This plate will convert circular polarisation to linear polarisation and so the feed can
be used for either type of polarisation. An optional offset feedhorn adapter kit for offset dishes is also available.

Primesat Single Polarity C Band feedhorn with one C Band CPR229 flange block type LNB
Order Code SPF1LNB
Only £129.90

Primesat Single Polarity C Band feedhorn only (without LNB). CPR229 flanges
Order Code SINGPOL
Only £69.95



Prime Focus and Offset Dishes.

Primesat 1.8m Dish Primesat 1.8m Dish

Our new 1.8m Primesat motorised prime focus dish is shown above.
This type of dish is circular NOT oval. It has 3 feed support arms (some use 4 arms) and the 3 arms
converge in the centre. Each arm is 120 degrees apart. The feedhorn uses concentric scalar rings.
The concentric scalar rings reduce noise and improve signal to noise ratio with prime focus dishes.
An offset dish (See below) is oval and is higher than it is wide (some are wider than they are high).
They use either one feed support arm (at the bottom of the dish - see bottom left hand picture) or 3
feed support arms (again all in the bottom 1/2 of the dish - see bottom right hand picture).
Many offset dishes use a standard 40mm clamp LNB but some more expensive specialised offset dishes
also use a feedhorn If a feedhorn is used, a c120 flange LNB is bolted to it.

Offset dish with one support arm Offset dish with three support arm

Prime Focus Dish

As a general rule the two types of dishes are simply two ways of doing the same job, however, an offset
dish, if well engineered, usually has significantly more gain than the prime focus dish. It is never
really that simple. It is true that petalised offset dishes usually have poor gain but a one-piece
well engineered prime focus dish can be better than a poorly engineered offset dish and some very
good prime focus dishes can have the same gain as a good offset dish of the same size.
As usual you get what you pay for. Cheap prime focus petalised dishes are to be
avoided and we don't sell them.
Prime focus dishes probably look better than offset dishes as they point upwards.

Update Feb. 2011 -
See our new 1.4m prime focus dishes at fixed 1.4m prime focus dish and motorised 1.4m prime focus dish

Primesat 1.4m Dish Primesat 1.4m Dish

Update June. 2012 More info. -
Comparing a prime focus dish with an offset dish.
Which has the most gain?
Assuming two dishes have exactly the same area, which is unlikely as dishes of the same quoted diameter are rarely
the same (more about that later) but assuming the same area, and (for the sake of this discussion) the same efficiency
(same accurate parabolic shape, again unlikely) the offset dish should produce more signal as the arms, feed support,
feedhorn and lnb are not in the signal path. However, it is never that simple. A prime focus dish produces a very
precise focal point. (Just like focussing the sun with a magnifying glass), the electromagnetic microwaves can be
focused to a very exact well defined position into the feedhorn.
In addition, any unwanted radiation, (e.g. infra red heat) that approaches the feedhorn from around the edge of the
dish are rejected around the edge of the feedhorn by the scalar rings. These rings produce destructive interference
and therefore maintain a high signal to noise ratio.
The focal point on an offset dish is not as precise and the feedhorn needs to be flaired to collect the radiation.
There are no scalar rings and so it is more likely that noise (eg infra red from around the edges of the dish)
can enter the feedhorn. It is possible that this effect, (improved signs to noise ratio)
can, to a greater or lesser extent make up for the shadows on a prime focus dish due to the feed assembly.
Some manufacturers, when they quote dish diameter, quote maximum, others quote average and some quote useable.
Does the dish work all the way to the edge or is there a roll off area resulting in a much smaller useable area?
Petallised dishes or dishes in several segments tend to have low efficiency as they usually do not form a very good
parabola. once assembled they often lack accuracy.
The quality and rigidity of the feed support arms can also affect the amount of signal being received
Flimsy arms may not hold the feedhorn and lnb in the exact optimum position. It may be possible for the arms to flex
to a position that gives better results but then they spring back again. Paying more for a dish usually provides a
higher build quality. Petalised dishes are usually cheap and have a very disappointing performance. One piece dishes
tend to work really well if manufactured by specialist companies that make quality a priority.
Dishes can be made of steel, (steel needs to have a good coating to stop corrosion) aluminium, or fibre glass / plastic.
The type of material is not really an issue. What can be a problem is if the material is too thin. If it can be damaged
or warped in transit or in high winds.
The backplate needs to be very strong. Here steel is ideal and the best covering is "dipped galvanised". All bolts,
nuts and u clamps should be stainless steel. Brass is a good material for long threaded elevation adjusters.
The gain of a dish should be specified at (at least) 3 frequencies. The feedhorn should be designed for the dish, or
have an adjustable f/d (scalar rings on a threaded adjustment) that can be matched to the dish.
40mm universal lnbs may not be a good match. All prime focus dishes should use a prime focus feedhorn with scalar rings.
A prime focus or offset matched feedhorn should provide an improvement over an LNBF (An LNBF is an LNB with an intergrated
feedhorn, more commonly these days called a 40 mm LNB. Technically only an lnb without an integrated feedhorn
e.g. a c120 LNB or a block type should be called an LNB) if the dish size is 1.2m or larger. (Larger dishes have
a narrower acceptance angle) Whether prime focus or offset, a matched feedhorn should improve the signal to noise ratio.
To summarise, there are good well engineered offset dishes and low cost mass maket offset dishes. There are high quality
prime focus dishes and some poor quality low cost petalised prime focus dishes. As usual "you get what you pay for".
Which look the best?
This is a matter of opinion but the prime focus dish points upwards to the satellite and looks purposeful. When domestic
satellite TV started in the UK in 1985 all dishes were prime focus.
The offset dish reflects the radiation downwards and so the dish face is more vertical (there is an offset angle).
There is a great deal more to this subject than most people realise, hopefully this discussion clarifies some of the
differences. Cost, build quality, the right matereials and good design are the key to maximum
useful signal (High signal to noise ratio.) quality dishes.



(All prices on this web site include VAT.)

Links to menu pages,

Catalogue Contents Page. A summary of all pages. More products.
ADVICE Pages. Frequently Asked Questions. (FAQs) Read and learn!

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2, 3 or 4 satellite on a fixed dish menu page.
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Ku, Ka, Universal and programmable LNBs menu page.
feedhorns menu page.
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Vu+ receivers menu page.
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cams menu page.
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See our other web site at- www.primesat.eu

This site includes many products that are exclusive to the Satellite Superstore.
The site contains -
• Products that we manufacture (e.g. We have manufactured heavy duty wall mounts and ground stands since 1991).
• Selected products which have our own Primesat brand name and have been prepared to our specifications.
• Selected products where we have been appointed the authorised UK or European distributor by the manufacturer.
www.primesat.eu is an information site. Here you will find full specifications and many detailed pictures.
To buy any of these products, simply order them on this web site.



Link to our own satellite museum site

Satellite Museum. A Museum of vintage satellite receivers.
See
www.satellitemuseum.com

Satcom 7700 satellite receiver.

For old Satellite receivers with knobs on and the history of satellite TV.

Also see www.rewindmuseum.com. A Museum of vintage consumer electronics.
Vintage reel to reel video recorders. Vintage VHS and Betamax VCRs. Vintage video cameras. Vintage
Laser Disc. Vintage Computers. Old telephones. Old brick mobile phones. Vintage Hi Fi, Old reel
to reel audio and early audio cassette decks. Including, the history time line of vintage
consumer electronics ... and much more .....

Sony 2400 portable reel to reel video

It is well worth a visit.
Only The Satellite Superstore brings you
great products, advice and it's own museum.


Rewind Museum



You may be interested in two other web sites.

Hard tonneau cover for the 1947-53 Chevy truck. Hard tonneau cover for the 1947-53 Chevy truck.

www.1952chevytruck.com
This web site shows all of the restoration process and the modifications to this truck.
In addition, there is a hard high quality tonneau cover on a new web site
at www.classictonneaucover.com for the 1947-53 Chevy truck.


www.classictonneaucover.com



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