Motorola SQ chip set

[jupp369]

Does anyone have a readable circuit diagram for the mc13xx chipset version 3?

 

[RPLaJeunesse]

https://www.proaudiodesignforum.com/forum/php/viewtopic.php?t=427

 

[jupp369]

https://www.proaudiodesignforum.com/forum/php/viewtopic.php?t=427

Thank You!
the readable V1 and V2. Have build those versions several times, and now I'm looking for V3 without the 1312.
There must be a reason that they drop the 1312, but all capacities and resistors in that hand"writing" are unreadable for me.

 

[Energyman]

Reach out to marine engine rebuilders or specialty machinists...some can rebalance a standard 1 piece flywheel and retrofit it for reverse rotation, it's not common, but definitely doable with the right shop.

 

[Shiminet]

@jupp369 You might have better luck asking the admin if they have got some time to add a vintage audio sub-forum here hahaha since a few people out here most probably still tinker with those SQ chip builds. Sometimes old service manuals pop up on archive sites too. Have you tried?

 

[barfle]

There’s an associated forum full of quaddies where you will,probably find just what you’re looking for. quadraphonicquad.com is a very active site with threads covering records, tapes, optical discs, digital files, decoders, encoders, switches, and even beer and football. Give them a try.

 

[jupp369]

There's an associated forum full of quaddies where you will,probably find just what you're looking for. quadraphonicquad.com is a very active site with threads covering records, tapes, optical discs, digital files, decoders, encoders, switches, and even beer and football. Give them a try.

es, there I found a lot and help!
But now there they are more interrested in buying CD's and draft beer, waiting for a new batch, etc.
Thought here would be the electronic masters ...
"Circuits Forum – DIY PCB Builds, Circuit Design & Hardware Projects"

 

[jupp369]

@jupp369 You might have better luck asking the admin if they have got some time to add a vintage audio sub-forum here hahaha since a few people out here most probably still tinker with those SQ chip builds. Sometimes old service manuals pop up on archive sites too. Have you tried?

very helpful ...

 

[barfle]

es, there I found a lot and help!
But now there they are more interrested in buying CD's and draft beer, waiting for a new batch, etc.
Thought here would be the electronic masters ...
"Circuits Forum – DIY PCB Builds, Circuit Design & Hardware Projects"

To be sure, there's a lot of discussion about Rhino's releases and what the members have been listening to, but there's some hardware discussions, too.

https://www.quadraphonicquad.com/forums/threads/diy-sq-decoders.21914/

I believe this is the schematic you're looking for. I dug it out of a file I've been keeping for over 50 years. It was pretty yellowed, but I hope this is all readable.

It's a picture filetype because I couldn't correct a pdf's contrast, which was pretty bad.

Good luck!

 

[jupp369]

To be sure, there's a lot of discussion about Rhino's releases and what the members have been listening to, but there's some hardware discussions, too.

https://www.quadraphonicquad.com/forums/threads/diy-sq-decoders.21914/

I believe this is the schematic you're looking for. I dug it out of a file I've been keeping for over 50 years. It was pretty yellowed, but I hope this is all readable.

It's a picture filetype because I couldn't correct a pdf's contrast, which was pretty bad.

Good luck!

Thanks a lot ! much better readable than what I got from the normal sources!