Not China but the orient in general. The stocks could've easily made their way to China over the years! I'm sure China would've/could've been a dumping ground for such items!
(1974-12) SQ Stereo Enhancement [CBS Labs]
- Thread starter kfbkfb
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Soundfield
1K Club - QQ Shooting Star
Your faith in China as being a reliable source of genuine components is not universally shared.
Are schematics available?
Yes just flip back earlier in this thread!
https://www.quadraphonicquad.com/forums/threads/1974-12-sq-stereo-enhancement-cbs-labs.29763/page-2
To all of you who reposted the old CBS SQ circuit a big Thank You!!
till now I listened only to a "printed" SQ on my receiver, but that was not SQ, only some resistors. So SQ was all the years only a better stereo not real quad as CD-4.
Sorry that I didn't see that circuit before 50 years.
As par4ken states: switch the matrix on and listen always in that mode. You will be suprised that also very old records (like Pretty Things- Rainin in my heart) will suprise you.
I changed my amp. so it will automatical switch between CD-4 and the Motorola SQ level 2.
Thank You all !!
till now I listened only to a "printed" SQ on my receiver, but that was not SQ, only some resistors. So SQ was all the years only a better stereo not real quad as CD-4.
Sorry that I didn't see that circuit before 50 years.
As par4ken states: switch the matrix on and listen always in that mode. You will be suprised that also very old records (like Pretty Things- Rainin in my heart) will suprise you.
I changed my amp. so it will automatical switch between CD-4 and the Motorola SQ level 2.
Thank You all !!
Also others will maybe work.
I orderd 4 sets, got 3 MC1314 with 16 pins and one with 14 pins, all with the same number ...
The MC1314 is a Voltage Controlled Amplifier and has 16 pins. The MC1315 is the SQ logic control circuit and also has 16 pins. THe MC1312 SQ decoder chip has 14 pins. Less common there was also an MC1313 12 volt version of the MC1312.
Soundfield
1K Club - QQ Shooting Star
If you have got a 14 pin "MC1314" the only thing you can be 100% certain of is that is NOT a MC1314!!!
I've used the Involve Evaluation encoder to create Involve-encoded CD's from my SACD's, DVD-A's, and BD_A's, all with very impressive results. I used the "Intelligent Encode" mode. That mode maximizes stereo compatibility, without compromising surround performance. The discs decode nicely using Pro Logic II, as well as through the SM. Played in stereo, as I do in the car, the image seems wider than the car itself.
Hmmm, not likely it’s a date code, either.
That 14 pin chip must be mislabelled or fake. I don't see why anyone would bother to fake it!? All 16 pins of the MC1314 have a purpose. How would you connect a 14 pin version?
Soundfield
1K Club - QQ Shooting Star
Because it is no bother and costs nothing - you can do it in your garage. You get a skip load of reject chips of any type and use a solvent to wipe the part numbers off. You spray jet print whatever new part number on you want on a bunch, depending on what you might have seen going for a high price recently. Stick them on eBay or wherever. Relabel a another bunch with another number tomorrow. Happens all the time. Well documented scam across the globe.
You sound as if it has happened to you! I have never ever had such a problem.
I do wonder about high end op-amps sold cheaply from China, they could be rebranded 741's. You would never know without the equipment to check/measure their full performance.
Due to component shortages our production dept. had to go to the grey market to purchase a part, and we've just had a batch of chips which are either fakes or somebody fished out of the failed bin and sold them on.
The Fry's business model!
Downmixing Atmos to 4.0 - just wondered if you built a circuit to take in 7.1.4 [place the 4 overhead channels near the corresponding channel in the 4.0 arrangement] and output 4.0 for the QS encoder?
Kirk Bayne
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