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Old Cambridge LNB Data
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<blockquote data-quote="cj&amp;m" data-source="post: 344913" data-attributes="member: 249210"><p>Thanks, 2cvbloke.</p><p>Unfortunately, these are the only markings on the LNBs.</p><p></p><p>In Part 2 of 'LNBs explained' _www.satcure.co.uk, section 2 shows a photo of an Enhanced LNB - both mine look exactly the same, and primitive tuning experiments to date seem to indicate that the Cambridge AE 23/28 has only one band, as does the AE6 shown. I am not sure what channels were around when I first had this system installed (can't remember how long ago that was!), but this configuration would appear to be consistent with detecting German analogue channels on Astra 1 (low band only?).</p><p></p><p>The other Cambridge LNB has UN in the model number which could indicate a 'Universal' (dual band) type (it is also physically bigger). I am not sure whether there were useful analogue channels in the High Band then but, if there were, this could explain why a dual band was fitted. Today, as far as I can see, all LNBs are dual band and relatively cheap but, in those days, dual band LNBs might have been considerably more expensive - possibly indicating why different LNBs were used?</p><p></p><p>If anyone has any 'historical' data on these LNBs to confirm these speculations, I would still be grateful to hear.</p><p></p><p>Concerning, the re-alignment, I did realise that I would have to increase the separation, but the current bracket has plenty of room to accomodate this (if it doesn't deteriorate any further!). I am not sure that 13 degrees has much to interest us, so will probably stick to 2 LNBs at this time.</p><p></p><p>I will probably upgrade to modern LNBs at some stage, but the current step-by-step, easily recoverable, approach was to swing the dish 6 degrees eastwards so that the supposedly dual band centrally-mounted UN011 was now pointing at Astra 1 (at 19 degrees) (from 13 deg), and then move the supposedly single band AE 'offset' LNB by 3 degrees or so relative to point at Astra 2 (at 28 degrees).</p><p></p><p>My proposed configuration would then be </p><p>Digital:</p><p>Astra 2 (28 deg) and Astra 1 (19 deg) fed to my Phoenix Apollo via a Diseqc switch (any recommendations?).</p><p>Analogue (for the time being):</p><p>Astra 1 and 2 fed to my old Pace MSS 301 via the Apollo I/F loop-through output connector.</p><p></p><p>This would be to provide:</p><p>a) Digital BBC TV etc, as we cannot get terrestial digital TV in our little hollow, and</p><p><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite6" alt=":cool:" title="Cool :cool:" loading="lazy" data-shortname=":cool:" /> Mainstream German and Spanish channels.</p><p></p><p>Any comments gratefully received.</p></blockquote><p></p>
[QUOTE="cj&m, post: 344913, member: 249210"] Thanks, 2cvbloke. Unfortunately, these are the only markings on the LNBs. In Part 2 of 'LNBs explained' _www.satcure.co.uk, section 2 shows a photo of an Enhanced LNB - both mine look exactly the same, and primitive tuning experiments to date seem to indicate that the Cambridge AE 23/28 has only one band, as does the AE6 shown. I am not sure what channels were around when I first had this system installed (can't remember how long ago that was!), but this configuration would appear to be consistent with detecting German analogue channels on Astra 1 (low band only?). The other Cambridge LNB has UN in the model number which could indicate a 'Universal' (dual band) type (it is also physically bigger). I am not sure whether there were useful analogue channels in the High Band then but, if there were, this could explain why a dual band was fitted. Today, as far as I can see, all LNBs are dual band and relatively cheap but, in those days, dual band LNBs might have been considerably more expensive - possibly indicating why different LNBs were used? If anyone has any 'historical' data on these LNBs to confirm these speculations, I would still be grateful to hear. Concerning, the re-alignment, I did realise that I would have to increase the separation, but the current bracket has plenty of room to accomodate this (if it doesn't deteriorate any further!). I am not sure that 13 degrees has much to interest us, so will probably stick to 2 LNBs at this time. I will probably upgrade to modern LNBs at some stage, but the current step-by-step, easily recoverable, approach was to swing the dish 6 degrees eastwards so that the supposedly dual band centrally-mounted UN011 was now pointing at Astra 1 (at 19 degrees) (from 13 deg), and then move the supposedly single band AE 'offset' LNB by 3 degrees or so relative to point at Astra 2 (at 28 degrees). My proposed configuration would then be Digital: Astra 2 (28 deg) and Astra 1 (19 deg) fed to my Phoenix Apollo via a Diseqc switch (any recommendations?). Analogue (for the time being): Astra 1 and 2 fed to my old Pace MSS 301 via the Apollo I/F loop-through output connector. This would be to provide: a) Digital BBC TV etc, as we cannot get terrestial digital TV in our little hollow, and B) Mainstream German and Spanish channels. Any comments gratefully received. [/QUOTE]
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