First models were based on Threshold schematics, with high quality Japanese parts.
Later versions began to diverge, still with high quality parts.
Later versions began to diverge, still with high quality parts.
I have two CA-7A preamps. I upgraded one with SoniCaps between amp stages, and the OpAmps with OPA2134's. I have not yet upgraded the second one. Anyone against doing the same to the second preamp? (the upgraded one is great IMHO)
No insights there, as I did not participate in their preamps. The boyz at Nakamichi did introduce me to the then-new Toshiba Jfets.
Thanks for your reply, Mr. Pass. I also have a Nakamichi OMS-7AII that took years to find a replacement laser assembly. Unfortunately, one of the rubber idler wheels has melted, and that needs replacement. My first Nakamichi was their 700. I bought used while in the Army living in Berlin. It worked fine for nearly 6 months then the power supply died. After warranty of course. That power supply was essentially overloaded and died twice more before I replaced the entire PS circuit board with a perfboard of my own design. It survives to this day. Thanks again for your reply.
Hi Mr. Pass. You might like this semiconductor possibility; https://efabless.com/chipignite/No insights there, as I did not participate in their preamps. The boyz at Nakamichi did introduce me to the then-new Toshiba Jfets.