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DISH SETUP: Single sat, Multi-Sat & Motorised
KA Band section
An Inverto Ka LNB Band B To Band A Mod
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<blockquote data-quote="Llew" data-source="post: 1053754" data-attributes="member: 175007"><p>Continuing the modding.</p><p>A thin piece of PTFE sheet was placed over the filters using small pieces of Sellotape over them and stuck to the sides of the circuit board, and also some pieces were placed in the two side chambers of the metal casting (see earlier pic).</p><p></p><p>With any luck the DRO puck has been 'shaved' of some of its ceramic material to resonate within the frequency band required (you can see how much I removed in pic 2), so it can be attached to the oscillator area on the Inverto's circuit board. The oscillator frequency can be adjusted over several hundred MHz, so there is some latitude if the puck's resonating frequency is some way off the ideal position.</p><p></p><p>The puck will sit within the little green circle (pic 1), so that its white 'pedestal' underneath the puck proper is adjacent, but not touching, the bipolar/FET oscillator transistor's base/gate (pic 2). Use a tiny piece of double-sided tape attached to the bottom of the white 'pedestal', making sure that there's no area of the tape touching the transistor base/gate or the circuit stubs at the sides of the puck. Fiddly work, but it's not too difficult to do if you have a good magnifying glass or something similar. The ones I've done for this and another for Band C have stayed in place over quite a time, so it can be left as is, but a more permanent fix could be by using a tiny drop of super glue.</p><p></p><p>Reassembled, it was tested for oscillation by connecting the LNB to the PC and using Crazyscan to check it wasn't flatlining (oscillator not working). Noisy scan (working).</p><p></p><p>Access to the adjustable DRO screw for setting the correct frequency was made by making a hole in the metal cover over the screw, and also the plastic cover (which can be taped up to seal it later).</p><p></p><p>Was it worth the bother? Well, the Saorsat LNB is useless where I live, I like playing about with Ka LNBs, and for the price it's one means of entry into Band A reception.</p><p></p><p>[ATTACH=full]118322[/ATTACH]</p><p></p><p>[ATTACH=full]118323[/ATTACH]</p><p></p><p>[ATTACH=full]118324[/ATTACH]</p></blockquote><p></p>
[QUOTE="Llew, post: 1053754, member: 175007"] Continuing the modding. A thin piece of PTFE sheet was placed over the filters using small pieces of Sellotape over them and stuck to the sides of the circuit board, and also some pieces were placed in the two side chambers of the metal casting (see earlier pic). With any luck the DRO puck has been 'shaved' of some of its ceramic material to resonate within the frequency band required (you can see how much I removed in pic 2), so it can be attached to the oscillator area on the Inverto's circuit board. The oscillator frequency can be adjusted over several hundred MHz, so there is some latitude if the puck's resonating frequency is some way off the ideal position. The puck will sit within the little green circle (pic 1), so that its white 'pedestal' underneath the puck proper is adjacent, but not touching, the bipolar/FET oscillator transistor's base/gate (pic 2). Use a tiny piece of double-sided tape attached to the bottom of the white 'pedestal', making sure that there's no area of the tape touching the transistor base/gate or the circuit stubs at the sides of the puck. Fiddly work, but it's not too difficult to do if you have a good magnifying glass or something similar. The ones I've done for this and another for Band C have stayed in place over quite a time, so it can be left as is, but a more permanent fix could be by using a tiny drop of super glue. Reassembled, it was tested for oscillation by connecting the LNB to the PC and using Crazyscan to check it wasn't flatlining (oscillator not working). Noisy scan (working). Access to the adjustable DRO screw for setting the correct frequency was made by making a hole in the metal cover over the screw, and also the plastic cover (which can be taped up to seal it later). Was it worth the bother? Well, the Saorsat LNB is useless where I live, I like playing about with Ka LNBs, and for the price it's one means of entry into Band A reception. [ATTACH=full]118322[/ATTACH] [ATTACH=full]118323[/ATTACH] [ATTACH=full]118324[/ATTACH] [/QUOTE]
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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
KA Band section
An Inverto Ka LNB Band B To Band A Mod
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