Greetings all,
I have recently discovered the Stasis amps that Nakamichi produced under license from Nelson. I have acquired several with the intent of re-capping them and making them the best they can be.
To that end, when reviewing the schematics between the 5 and the 7, there is a 10uf 35v Cerafine in the circuit on the 7's that has been left out of the 5. It appears the front ends are very similar minus the offset adjustment that is included on the PA-7. I have circled the subject cap in red.
What is the purpose of this cap, and can I eliminate it in the 7's?
I've attached both schematics for reference.
Would there be any problem with replacing the 4.7K offset trimmer in the 7's with a 5K unit? I ask because I'm unable to find a multi-turn 4.7 that will fit while still allowing access for adjustment. Also, any problem with replacing the other 150 ohm bias trimmer with a 200 ohm unit? I'm dealing with the same size and access issues on this one as well.
I know very little about circuit design, so I thought that I'd ask.
Any help would be much appreciated!
Thanks in advance,
Steve
PS - I apologize for the blurry scans.
PA-5 schematic on left, PA-7 on right
I have recently discovered the Stasis amps that Nakamichi produced under license from Nelson. I have acquired several with the intent of re-capping them and making them the best they can be.
To that end, when reviewing the schematics between the 5 and the 7, there is a 10uf 35v Cerafine in the circuit on the 7's that has been left out of the 5. It appears the front ends are very similar minus the offset adjustment that is included on the PA-7. I have circled the subject cap in red.
What is the purpose of this cap, and can I eliminate it in the 7's?
I've attached both schematics for reference.
Would there be any problem with replacing the 4.7K offset trimmer in the 7's with a 5K unit? I ask because I'm unable to find a multi-turn 4.7 that will fit while still allowing access for adjustment. Also, any problem with replacing the other 150 ohm bias trimmer with a 200 ohm unit? I'm dealing with the same size and access issues on this one as well.
I know very little about circuit design, so I thought that I'd ask.
Any help would be much appreciated!
Thanks in advance,
Steve
PS - I apologize for the blurry scans.
PA-5 schematic on left, PA-7 on right
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