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Analogue 70MHz IF Loop receiver
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<blockquote data-quote="Channel Hopper" data-source="post: 1153375" data-attributes="member: 175144"><p>And for those still interested (Llew) the NE568 was the chip used in 1991/2, superceded by the SA568/A but they can be substituted with small mods to board components.</p><p></p><p>Somewhere in the archives I have files of the work on early tuner/demod design with Samsung (a different company to that now in the consumer box business), they were using early Sharp digital tuners with dual saw filter switching (18/27MHz) since it was the easy way to lower SR scanning below 10000. Nobody in the business seemed to be interested since all the bouquets provided for the main operators at the time were 22000 or higher.</p><p></p><p>How things have changed.</p></blockquote><p></p>
[QUOTE="Channel Hopper, post: 1153375, member: 175144"] And for those still interested (Llew) the NE568 was the chip used in 1991/2, superceded by the SA568/A but they can be substituted with small mods to board components. Somewhere in the archives I have files of the work on early tuner/demod design with Samsung (a different company to that now in the consumer box business), they were using early Sharp digital tuners with dual saw filter switching (18/27MHz) since it was the easy way to lower SR scanning below 10000. Nobody in the business seemed to be interested since all the bouquets provided for the main operators at the time were 22000 or higher. How things have changed. [/QUOTE]
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Analogue 70MHz IF Loop receiver
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