G GabrieleP Active member Joined Dec 6, 2011 Messages 35 Oct 7, 2012 #1 Hello! I am looking for documentation, schematics, operating manual or anything related to old DOLBY 320 Type-B noise reduction unit. Thank you in advance for your help! Gabe
Hello! I am looking for documentation, schematics, operating manual or anything related to old DOLBY 320 Type-B noise reduction unit. Thank you in advance for your help! Gabe
G GabrieleP Active member Joined Dec 6, 2011 Messages 35 Apr 11, 2022 #2 It's the one you see top right on this old brochure: https://worldradiohistory.com/hd2/I...X/IDX/70s/Recording-1974-02-OCR-Page-0018.pdf Update I ended up disassembling the unit. Now I have four big audio transformers, two input & two output. Two wires for primary, two wires for secondaries. Is there a way to determine actual impedances?
It's the one you see top right on this old brochure: https://worldradiohistory.com/hd2/I...X/IDX/70s/Recording-1974-02-OCR-Page-0018.pdf Update I ended up disassembling the unit. Now I have four big audio transformers, two input & two output. Two wires for primary, two wires for secondaries. Is there a way to determine actual impedances?
ruffrecords Well-known member Joined Nov 10, 2006 Messages 17,282 Location Norfolk - UK Apr 11, 2022 #3 The input transformer I believe are 10K:10K. I have a couple of these myself and I sold the input transformers. I think I may have a service or instruction manual somewhere. Cheers Ian
The input transformer I believe are 10K:10K. I have a couple of these myself and I sold the input transformers. I think I may have a service or instruction manual somewhere. Cheers Ian