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Tech Head - The Technology Section
Retro Tech
Sinclair
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<blockquote data-quote="spiney" data-source="post: 119429" data-attributes="member: 192438"><p>The thing about Sinclair stuff is, none of it worked as advertised (that's safe to say!), but much of it "worked" most of the time, providing you were careful!</p><p></p><p>I've still got a working Project 60, with Z30 amplifiers (advertised as 30 Watts RMS 0.003% THD, actually 10 and 0.1!). They're easy to "pop", and I've replaced the output trannies several times (so I don't switch it on often!).</p><p></p><p>Pre-amp originally used "trimmer pots" as main controls, which became noisy after a few weeks, and had to be replaced with "real" pots.</p><p></p><p>Best of all is the tuner, using phase lock demodulation, which as Uncle Clive correctly said, was used in receiving signals from spacecraft (unfortunately, he didn't include a cryogenic maser amplifier with his tuner!). Walking across the room often makes the tuner change channels (these were the early days of phaselock, done entirely with discrete components). Sometimes, just pointing at it is enough, a quite eerie effect (any more sensitive, and it would pick up brainwaves!).</p></blockquote><p></p>
[QUOTE="spiney, post: 119429, member: 192438"] The thing about Sinclair stuff is, none of it worked as advertised (that's safe to say!), but much of it "worked" most of the time, providing you were careful! I've still got a working Project 60, with Z30 amplifiers (advertised as 30 Watts RMS 0.003% THD, actually 10 and 0.1!). They're easy to "pop", and I've replaced the output trannies several times (so I don't switch it on often!). Pre-amp originally used "trimmer pots" as main controls, which became noisy after a few weeks, and had to be replaced with "real" pots. Best of all is the tuner, using phase lock demodulation, which as Uncle Clive correctly said, was used in receiving signals from spacecraft (unfortunately, he didn't include a cryogenic maser amplifier with his tuner!). Walking across the room often makes the tuner change channels (these were the early days of phaselock, done entirely with discrete components). Sometimes, just pointing at it is enough, a quite eerie effect (any more sensitive, and it would pick up brainwaves!). [/QUOTE]
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Sinclair
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