BSC 621 C/Ku lnb to C/Ka LNB

scopus

scopus

Specialist Contributor
Messages
2,125
My Satellite Setup
Primesat/Famaval 1.8 PF C/ku/Ka, Octagon SX8HD1, SX88, Openbox S3 Mini HD-V8S Freesat V7 HD-V8 Finder, Amiko A4K Combo, Satlook Colour HD Spectrum, Sansui A909 Amp and BOSE Acoustimass speakers for the audio.
My Location
Staffs UK
OK, well wasn't sure if this was a goer, but I took the Ku LNB off a BSC C/Ku combo LNB as Ku was never very good and grafted a Hughes Ka LNB with the XMW FD9000 feed to the end. using half the casing that housed the Ku LNB and snugly fitting the Ka feed inside with some skrinkdown to waterproof it.
The C LNB probes remain at 10 and two O'clock with the Ka probe at 12 O'clock. then the whole thing is fitted in the AV Comm barrel.
One big bonus was that the barrel gives me both V and H on Ka band without having to move the LNB at all. I'm sure you theory people will have a better idea how this is working???
Anyway it works really well, looks a bit like a torpedo but hey C and Ka from one LNB and I would say that the Ka is no worse that siting the LNB offset by a few degrees
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P1010022.JPGP1010024.JPGP1010025.JPGP1010026.JPGP1010027.JPGP1010028.JPG
 
John

John

Enthusiast.
Messages
2,247
Location
North Nottinghamshire.
My Satellite Setup
Elite 2.2 PF - CM1.8 - CM1.2 - Gibertini 1.25.
Ku - Ka -C & Ext C.
PC cards-TM5402 receivers.
Promax FSM.
My Location
North Nottinghamshire.
OK, well wasn't sure if this was a goer, but I took the Ku LNB off a BSC C/Ku combo LNB as Ku was never very good and grafted a Hughes Ka LNB with the XMW FD9000 feed to the end. using half the casing that housed the Ku LNB and snugly fitting the Ka feed inside with some skrinkdown to waterproof it.
The C LNB probes remain at 10 and two O'clock with the Ka probe at 12 O'clock. then the whole thing is fitted in the AV Comm barrel.
One big bonus was that the barrel gives me both V and H on Ka band without having to move the LNB at all. I'm sure you theory people will have a better idea how this is working???
Anyway it works really well, looks a bit like a torpedo but hey C and Ka from one LNB and I would say that the Ka is no worse that siting the LNB offset by a few degrees
View attachment 124690
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.. Re: the dual Ka polarity - it's a bit hard to spot, but have you got the Hughes at 45° to the AV-Comm internal wall steps my loverly ?.
 
Llew

Llew

cerca trova...
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14,755
My Satellite Setup
Triple Dragon, Dreambox 8000, Echostar AD3000ip, TBS6522,6925,6983 PCie cards.
Gibertini 1.25m motorised dish driven by the AD3000, with either Inverto BU Quad or Norsat / XMW Ka LNBs . SMW 1.05m + 3 other dishes. Speccy: Promax HD Ranger+
My Location
The Flatlands of East Anglia
Blimey, that's one big combo you have there scopus. Nice work :)
 
scopus

scopus

Specialist Contributor
Messages
2,125
My Satellite Setup
Primesat/Famaval 1.8 PF C/ku/Ka, Octagon SX8HD1, SX88, Openbox S3 Mini HD-V8S Freesat V7 HD-V8 Finder, Amiko A4K Combo, Satlook Colour HD Spectrum, Sansui A909 Amp and BOSE Acoustimass speakers for the audio.
My Location
Staffs UK
Blimey, that's one big combo you have there scopus. Nice work :)
Luckily Llew the whole thing is quite light. It's a fair length though....
 
scopus

scopus

Specialist Contributor
Messages
2,125
My Satellite Setup
Primesat/Famaval 1.8 PF C/ku/Ka, Octagon SX8HD1, SX88, Openbox S3 Mini HD-V8S Freesat V7 HD-V8 Finder, Amiko A4K Combo, Satlook Colour HD Spectrum, Sansui A909 Amp and BOSE Acoustimass speakers for the audio.
My Location
Staffs UK
.. Re: the dual Ka polarity - it's a bit hard to spot, but have you got the Hughes at 45° to the AV-Comm internal wall steps my loverly ?.
Will double check dear, but I think the steps are at 9 and 3 o'clock and the Ka probe is at 12 o'clock. Will do a photo tomorrow looking up the barrel.
 
Channel Hopper

Channel Hopper

Suffering fools, so you don't have to.
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27,517
My Satellite Setup
A little less analogue, and a lot more crap.
My Location
UK South
Channel Hopper

Channel Hopper

Suffering fools, so you don't have to.
Staff member
Messages
27,517
My Satellite Setup
A little less analogue, and a lot more crap.
My Location
UK South
John

John

Enthusiast.
Messages
2,247
Location
North Nottinghamshire.
My Satellite Setup
Elite 2.2 PF - CM1.8 - CM1.2 - Gibertini 1.25.
Ku - Ka -C & Ext C.
PC cards-TM5402 receivers.
Promax FSM.
My Location
North Nottinghamshire.
Channel Hopper

Channel Hopper

Suffering fools, so you don't have to.
Staff member
Messages
27,517
My Satellite Setup
A little less analogue, and a lot more crap.
My Location
UK South
scopus

scopus

Specialist Contributor
Messages
2,125
My Satellite Setup
Primesat/Famaval 1.8 PF C/ku/Ka, Octagon SX8HD1, SX88, Openbox S3 Mini HD-V8S Freesat V7 HD-V8 Finder, Amiko A4K Combo, Satlook Colour HD Spectrum, Sansui A909 Amp and BOSE Acoustimass speakers for the audio.
My Location
Staffs UK
I have done a MKII version made out of a C Band tit, drilled out the backplate and used a spare Ku holder from a spare BSC621.
The C Band is now on the underside on the dish with the Ka as it was before. With the steps being at 12 and 6 o'clock as before I seem to have lost the horizontal on Ka, but the vertical Ka has seem a big improvement. C Band is now correct also with V at RHC and H at LHC...P1010029.JPGP1010030.JPGP1010031.JPGP1010032.JPGP1010033.JPG
 
Channel Hopper

Channel Hopper

Suffering fools, so you don't have to.
Staff member
Messages
27,517
My Satellite Setup
A little less analogue, and a lot more crap.
My Location
UK South
There is much to be said abot tits and inserting a fair length........


Oh wait, wrong forum......
 
John

John

Enthusiast.
Messages
2,247
Location
North Nottinghamshire.
My Satellite Setup
Elite 2.2 PF - CM1.8 - CM1.2 - Gibertini 1.25.
Ku - Ka -C & Ext C.
PC cards-TM5402 receivers.
Promax FSM.
My Location
North Nottinghamshire.
John

John

Enthusiast.
Messages
2,247
Location
North Nottinghamshire.
My Satellite Setup
Elite 2.2 PF - CM1.8 - CM1.2 - Gibertini 1.25.
Ku - Ka -C & Ext C.
PC cards-TM5402 receivers.
Promax FSM.
My Location
North Nottinghamshire.
.. that's why i was asking you the other night about the dual Ka polarity. I was suspecting you had the Ka probe at 45° with the Cband barrel side steps at 6 to 12 o'clock which would have given you a sniff at both polarities.
 
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