I found this kind of inductive filtering before the AC transformer primary in some early CD-players from Sony like CDP-103 / 102 / 502.
Did find it also on contemporary Toshiba XR-Z70 model (250µH), Philips CD-100, (25mH)
I did not find this kind of filtering in the very first Sony CDP-101, or many contemporary (Like Nakamichi, based on Sony and Philips design) and later (expensive) CD-players.
What was the purpose at the dawn of the CD? And is it something for us DIYers to rediscover for our designs?
Images from left to right:
CDP-102 schematic, CDP-102 parts list,Toshiba XR-Z70 schematic, Philips CD-100 schematic, Sony CDP-101 schematic (filter is missing there)
All the best,
Salar
Did find it also on contemporary Toshiba XR-Z70 model (250µH), Philips CD-100, (25mH)
I did not find this kind of filtering in the very first Sony CDP-101, or many contemporary (Like Nakamichi, based on Sony and Philips design) and later (expensive) CD-players.
What was the purpose at the dawn of the CD? And is it something for us DIYers to rediscover for our designs?
Images from left to right:
CDP-102 schematic, CDP-102 parts list,Toshiba XR-Z70 schematic, Philips CD-100 schematic, Sony CDP-101 schematic (filter is missing there)
All the best,
Salar
Attachments
Last edited: