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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
C-Band Reception, UK and Europe
Disaster!!
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<blockquote data-quote="Vipersan" data-source="post: 742291" data-attributes="member: 325666"><p>Hi friends ..</p><p>Spent a couple of days playing with the leech ..</p><p>..and whilst it certainly performed reasonably well ...</p><p>It did miss a few of the weaker sats ..plus it was often tricky having to take into account the elevation offset ..plus the angular offset which could be handful of degrees when at the extremes of the arc.</p><p>So ..in the spirit of experiment ..I decided to attempt a mole instead of a leech...</p><p>Working on the same principle as the dual ku/C lnb..sold in the USA ...but since I know these dont perform at all well in KU ...I decided to to come up with an adaption of my own ..</p><p>Since I don't want or neccessarily need a permanent fixture ..</p><p>This works exceptionally well ..</p><p>Just a pity no one makes a smaller c120 lnb that could be placed more centrally ..but It certainly does the job ..though of course it requires manual removal and refitting when needed.</p><p>I don't however have to make any changes to the C-band setup.</p><p></p><p>Having removed the casing from an invacom SNF-031..</p><p>I found there was a lot of wasted space inside ..</p><p>The lnb itself is relatively small ..though quite heavy.</p><p>It still couldn't be used however as access to the F connector was impossible with what I intended to do ..</p><p>So ..out came the hacksaw and off came the F connector ...very carefully so as to leave the centre connection insulated and intact.</p><p>This was the reduced in height ..and a small hole drilled into the cast casing to allow a small self tapping screw to be used as an ground connection.</p><p>A flying lead was then attached so it protudes out to the front ..past the small feed horn assy.</p><p></p><p>Another block of my favourite expanded foam was the cut to shape and hollowed out to make a stable 'cosy' around the now naked lnb ...</p><p>this keeps it from moving around ..and protects the C band probes inside the lnb throat ..</p><p></p><p>It all has been tested ...</p><p>Its very easily inserted and removed ..and performs very very well ..even though the feed is slightly forward of the dish focal point and slighty eccentric.</p><p></p><p>I can even pick up a fairly stable picture from Asia TV @57East with it.</p><p></p><p>Here are the pics of 'the mole'</p><p></p><p>Shown in the BSC422 ..as the BSC421 ..is currently mounted on the dish ..</p><p>The principle is the same ..but made for a better photo.</p><p></p><p>Before and after insertion.</p><p>rgds all</p><p>VS</p></blockquote><p></p>
[QUOTE="Vipersan, post: 742291, member: 325666"] Hi friends .. Spent a couple of days playing with the leech .. ..and whilst it certainly performed reasonably well ... It did miss a few of the weaker sats ..plus it was often tricky having to take into account the elevation offset ..plus the angular offset which could be handful of degrees when at the extremes of the arc. So ..in the spirit of experiment ..I decided to attempt a mole instead of a leech... Working on the same principle as the dual ku/C lnb..sold in the USA ...but since I know these dont perform at all well in KU ...I decided to to come up with an adaption of my own .. Since I don't want or neccessarily need a permanent fixture .. This works exceptionally well .. Just a pity no one makes a smaller c120 lnb that could be placed more centrally ..but It certainly does the job ..though of course it requires manual removal and refitting when needed. I don't however have to make any changes to the C-band setup. Having removed the casing from an invacom SNF-031.. I found there was a lot of wasted space inside .. The lnb itself is relatively small ..though quite heavy. It still couldn't be used however as access to the F connector was impossible with what I intended to do .. So ..out came the hacksaw and off came the F connector ...very carefully so as to leave the centre connection insulated and intact. This was the reduced in height ..and a small hole drilled into the cast casing to allow a small self tapping screw to be used as an ground connection. A flying lead was then attached so it protudes out to the front ..past the small feed horn assy. Another block of my favourite expanded foam was the cut to shape and hollowed out to make a stable 'cosy' around the now naked lnb ... this keeps it from moving around ..and protects the C band probes inside the lnb throat .. It all has been tested ... Its very easily inserted and removed ..and performs very very well ..even though the feed is slightly forward of the dish focal point and slighty eccentric. I can even pick up a fairly stable picture from Asia TV @57East with it. Here are the pics of 'the mole' Shown in the BSC422 ..as the BSC421 ..is currently mounted on the dish .. The principle is the same ..but made for a better photo. Before and after insertion. rgds all VS [/QUOTE]
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DISH SETUP: Single sat, Multi-Sat & Motorised
C-Band Reception, UK and Europe
Disaster!!
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