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 PLL single C Band LNB. 5G*
CPR229 block type CPR229 block type 5G reject Norsat 3120F PPL 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 Raven 60mm feed support

Twin C and Ku Band "Combo" voltage switching LNBF





Super high gain - 65dBs. - 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.
If used with the (1.2m, 1.8m, 2.4m) Raven dish (Formerly Channel Master or Andrews) the stainless steel 60mm support boss
for the Raven dish is needed.

Shipping options. (VAT info.) (Stock levels.)
Free UK delivery (includes offshore islands) on all orders over £14. Over £14 choose the small order delivery charge).
"UK - small items - free delivery." - UK shipping option No 3. Or the next day priority option.
All Internationals - EU or outside of the EU - choose the standard £15 "up to 1.5 Kg by insured international post" option.
Or, all Internationals - EU or outside of the EU - choose the £38 by faster courier shipping option.

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





Super high gain - 65dBs. - 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.
If used with the (1.2m, 1.8m, 2.4m) Raven dish (Formerly Channel Master or Andrews) the stainless steel 60mm support boss
for the Raven dish is needed.

Shipping options. (VAT info.) (Stock levels.)
Free UK delivery (includes offshore islands) on all orders over £14. Over £14 choose the small order delivery charge).
"UK - small items - free delivery." - UK shipping option No 3. Or the next day priority option.
All Internationals - EU or outside of the EU - choose the standard £15 "up to 1.5 Kg by insured international post" option.
Or, all Internationals - EU or outside of the EU - choose the £38 by faster courier shipping option.

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 LNBF





Super high gain - 65dBs. - 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.
If used with the (1.2m, 1.8m, 2.4m) Raven dish (Formerly Channel Master or Andrews) the stainless steel 60mm support boss
for the Raven dish is needed.

Shipping options. (VAT info.) (Stock levels.)
Free UK delivery (includes offshore islands) on all orders over £14. Over £14 choose the small order delivery charge).
"UK - small items - free delivery." - UK shipping option No 3. Or the next day priority option.
All Internationals - EU or outside of the EU - choose the standard £15 "up to 1.5 Kg by insured international post" option.
Or, all Internationals - EU or outside of the EU - choose the £38 by faster courier shipping option.

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

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

Offset Feed - Single C Band 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 CBD13KO
In stock and ready for immediate shipping.
£99.95

Titanium CI-PLL Single C Band voltage
switching LNBF. 5G rejection.
(High stability PLL "Phase Lock Loop").




PLL high stability LNBF. 5G rejection. 3.7Ghz to 4.2Ghz.
IF output 950-1450Mhz, LO frequency 5150MHz, Noise figure 15K typical, Image rejection 45dB,
Stability 50kHz typical, Cross polar isolation 20dB typical, Phase Noise -85dbc@10kHz (min),
Polarity switch V- 11.5-14Vdv, H - 16-20Vdc, Input VSWR 2.1:! (max), Output VSWR 2.0:1 (max),
Operating temp, -22 to 140f, Storage temp -40 to 160f,
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.
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.
If used with the (1.2m, 1.8m, 2.4m) Raven dish (Formerly Channel Master or Andrews) the stainless steel 60mm support boss
for the Raven dish is needed.

Shipping options. (VAT info.) (Stock levels.)
Free UK delivery (includes offshore islands) on all orders over £14. Over £14 choose the small order delivery charge).
"UK - small items - free delivery." - UK shipping option No 3. Or the next day priority option.
All Internationals - EU or outside of the EU - choose the standard £15 "up to 1.5 Kg by insured international post" option.
Or, all Internationals - EU or outside of the EU - choose the £38 by faster courier shipping option.

Prime Focus Feed - Titanium CI-PLL Single C Band voltage
switching LNBF.
In stock and ready for immediate shipping. Only 1 available.
Order Code CBANPPL
Only £249.95

Prime Focus Feed - Titanium CI-PLL Single C Band voltage switching LNBF
with feed support boss.
In stock and ready for immediate shipping.
Order Code CBPPLFS
£279.90

Offset Feed - Titanium CI-PLL Single C Band 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 CBPPLOF
In stock and ready for immediate shipping.
£289.95

Primesat Twin C Band
voltage switching LNBF





Super high gain - 65dBs. - 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.
If used with the (1.2m, 1.8m, 2.4m) Raven dish (Formerly Channel Master or Andrews) the stainless steel 60mm support boss
for the Raven dish is needed.

Shipping options. (VAT info.) (Stock levels.)
Free UK delivery (includes offshore islands) on all orders over £14. Over £14 choose the small order delivery charge).
"UK - small items - free delivery." - UK shipping option No 3. Or the next day priority option.
All Internationals - EU or outside of the EU - choose the standard £15 "up to 1.5 Kg by insured international post" option.
Or, all Internationals - EU or outside of the EU - choose the £38 by faster courier shipping option.

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

Prime Focus Feed - Twin C Band voltage switching 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 LNBF





Super high gain - 65dBs. - 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.
If used with the (1.2m, 1.8m, 2.4m) Raven dish (Formerly Channel Master or Andrews) the stainless steel 60mm support boss
for the Raven dish is needed.

Shipping options. (VAT info.) (Stock levels.)
Free UK delivery (includes offshore islands) on all orders over £14. Over £14 choose the small order delivery charge).
"UK - small items - free delivery." - UK shipping option No 3. Or the next day priority option.
All Internationals - EU or outside of the EU - choose the standard £15 "up to 1.5 Kg by insured international post" option.
Or, all Internationals - EU or outside of the EU - choose the £38 by faster courier shipping option.

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

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

Offset Feed - Quad C Band 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 QUADCBO
£119.95

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



Very low noise - 13K. Gain 65dB
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. (VAT info.) (Stock levels.)
Free UK delivery (includes offshore islands) on all orders over £14. Over £14 choose the small order delivery charge).
"UK - small items - free delivery." - UK shipping option No 3. Or the next day priority option.
All Internationals - EU or outside of the EU - choose the standard £15 "up to 1.5 Kg by insured international post" option.
Or, all Internationals - EU or outside of the EU - choose the £38 by faster 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

Primesat C Band professional CPR229
flange block type LNB. 13K. 5G ready.



Very low noise - 13K. Gain 62dB. 5G rejection.
Designed to fit an a Co-Rotor or C Band dual polarity feedhorn or C Band single polarity feedhorn. CPR229 flange.
Input Frequency: 3.7 - 4.2GHz, Output Frequency: 950 - 1750MHz.
Polarity: 1 (Horizontal or Vertical.) LO Frequency: 5150MHz,
Connector: F-Female, HDTV Approved.

Shipping options. (VAT info.) (Stock levels.)
Free UK delivery (includes offshore islands) on all orders over £14. Over £14 choose the small order delivery charge).
"UK - small items - free delivery." - UK shipping option No 3. Or the next day priority option.
All Internationals - EU or outside of the EU - choose the standard £15 "up to 1.5 Kg by insured international post" option.
Or, all Internationals - EU or outside of the EU - choose the £38 by faster courier shipping option.

One Primesat C Band professional CPR229 flange block type LNB. PR100C. 13K
Order Code PR105GC
Only £99.95

2x Primesat C Band professional CPR229 flange block type LNBs. PR105GC. 13K
Order Code 2PR105GC
Only £189.95

Norsat 3120F C Band block type PPL LNB.





PPL for max stability.
Designed to fit an a Co-Rotor or C Band dual polarity feedhorn or C Band single polarity feedhorn. CPR229 flange.
Input Frequency: 3.7 - 4.2GHz, LO stability + or - 5.0khz. Gain 62dB
Connector: F-Female, HDTV Approved.

Shipping options. (VAT info.) (Stock levels.)
Free UK delivery (includes offshore islands) on all orders over £14. Over £14 choose the small order delivery charge).
"UK - small items - free delivery." - UK shipping option No 3. Or the next day priority option.
All Internationals - EU or outside of the EU - choose the standard £15 "up to 1.5 Kg by insured international post" option.
Or, all Internationals - EU or outside of the EU - choose the £38 by faster courier shipping option.

Norsat 3120F C Band block type PPL LNB CPR229 flange block type LNB.
Order Code NORSAT
Only £449.95

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 used with the (1.2m, 1.8m, 2.4m) Raven dish
(Formerly Channel Master or Andrews) the stainless steel 60mm support boss for the Raven dish is needed.

Discounted oprice when you buy the feedhorn and LNB together.
Shipping options. (VAT info.) (Stock levels.)
Free UK delivery (includes offshore islands) on all orders over £14. Over £14 choose the small order delivery charge).
"UK - small items - free delivery." - UK shipping option No 3. Or the next day priority option.
All Internationals - EU or outside of the EU - choose the standard £15 "up to 1.5 Kg by insured international post" option.
Or, all Internationals - EU or outside of the EU - choose the £38 by faster courier 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.





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. (VAT info.) (Stock levels.)
Free UK delivery (includes offshore islands) on all orders over £14. Over £14 choose the small order delivery charge).
"UK - small items - free delivery." - UK shipping option No 3. Or the next day priority option.
All Internationals - EU or outside of the EU - choose the standard £15 "up to 1.5 Kg by insured international post" option.
Or, all Internationals - EU or outside of the EU - choose the £38 by faster courier 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 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. (VAT info.) (Stock levels.)
Free UK delivery (includes offshore islands) on all orders over £14. Over £14 choose the small order delivery charge).
"UK - small items - free delivery." - UK shipping option No 3. Or the next day priority option.
All Internationals - EU or outside of the EU - choose the standard £15 "up to 1.5 Kg by insured international post" option.
Or, all Internationals - EU or outside of the EU - choose the £38 by faster courier shipping option.

One dielectric plate.
Order Code 1DPLATE
Only £2.95

Ten dielectric plates.
Order Code 10DPLATE
Only £19.95

C Band Feed Support Boss for Raven Dish.







Designed for the Raven fibre glass offset dishes, 1.2m, 1.8m and 2.4m
Note, Raven dishes were formerly "Andrews" and before that "Channel Master".
This is a high quality stainless steel bracket / feed support boss for C Band LNBs with an offset feedhorn.
At last a very high quality product for fitting C band LNBs onto the Raven offset dish.

Click here to order.

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.

Shipping options. (VAT info.) (Stock levels.)
Free UK delivery (includes offshore islands) on all orders over £14. Over £14 choose the small order delivery charge).
"UK - small items - free delivery." - UK shipping option No 3. Or the next day priority option.
All Internationals - EU or outside of the EU - choose the standard £15 "up to 1.5 Kg by insured international post" option.
Or, all Internationals - EU or outside of the EU - choose the £38 by faster courier shipping option.

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.



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.



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.

Shipping options. (VAT info.) (Stock levels.)
Free UK delivery (includes offshore islands) on all orders over £14. Over £14 choose the small order delivery charge).
"UK - small items - free delivery." - UK shipping option No 3. Or the next day priority option.
All Internationals - EU or outside of the EU - choose the standard £15 "up to 1.5 Kg by insured international post" option.
Or, all Internationals - EU or outside of the EU - choose the £38 by faster courier shipping option.

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.



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.





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



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.)

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This site includes many products that are exclusive to the Satellite Superstore.
The site contains -
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See www.satellitemuseum.com



For old satellite receivers with knobs on and read about "A History Of Satellite TV".

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