They're very good figures for thd (total harmonic distortion) Willing to bet that PCB layout would play a key role in obtaining them though.Originally Posted by Ioannis
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They're very good figures for thd (total harmonic distortion) Willing to bet that PCB layout would play a key role in obtaining them though.
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choice of quality components as well... really hard to please a real HI-FI customer ears...myself include.
Steve
It's not a bug, it's a random feature.
There's no problem, only learning opportunities.
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Hi all,
I appreciate your responce and I thank you for the ideas you shared... Its enough for me to start to do researching.
Thanks again,
joe
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Throw a few things together on a piece of vero board, couple of lines of code in a 16f628 (my favorite pic), hookup a source input and give your ears a whirl. Worst that can happen is it doesn't work as good expected, dust yourself off and try again
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Hmm, it has higher THD and is controlled by analog voltage. So a DAC is really needed. More noise source and more difficult PCB. I can assure you Steve, it is a HI-FI device. I am high fidelist myself too.
Very nice indeed! This is what can be called art!
Yes, but I suppose that is a dominant rule in almost all electronics designs though. Good ground, capacitors on power lines, and seperatew analog and digital voltage sources to name a few. The vero board I can guess will not give optimum results in this case. It is not a LED test circuit...
Ioannis
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I think star point earthing is pretty much industry standard for quality audio circuitry. Best way to avoid the dreaded earth loop.
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Never mind Art - that's Engineering... I actually spent about ten minutes admiring that design... it is so way ahead of it's time it's almost uncanny...
It's not multi-channel audio, but just consider... Centre Bass Speaker (today we'll have a Centre Bass and we call it a Woofer), Centre High Range (today we have centre tweeters), Left & Right Mid-Range... all the elements of what today is 'Home Cinema'.
Motorised Turret Tuner - that's about five years ahead from when MANUAL one's were introduced into TV sets... never seen a Turret Tuner in a plain radio receiver from a western manufacturer... let alone a motorised one!
Cable Remote... Volume, Tuning and Wavechange and even Dial-Lights (how many Remotes do you have in your house with integral illumination?)... and look how THIN the cable to the Remote is... OK, it is done by wire (ie mechanical), but that's not the point.
B7G & B9A valves - when in the West most manufacturers were still fitting Octal...
The more you look at it, the more innovation you find... this is World-beating leading-edge technology of it's day - and for a domestic consumer market... it's a shame, so few people will look at that and realise what's actually there... just another square wooden box with valves inside...
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It looks like the people assembling that great radio, really liked what they were doing!
Imagine to have a production of this thing made by bare hands!
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