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Andy nicholson
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Last seen: 1 month 1 week ago
Joined: Mar 29 2020 - 3:53pm
Tube rolling a Cayin CS-100A

I am thinking of changing from factory issue Cayin branded KT88 tubes supplied with the CS-100A amplifier with something different. My question relates to the mechanics of doing this. The user manual has no instructions on how to go about this, and instructions emailed to me from the factory are non sensical due to poor english. I think the following is the procedure. Turn off the amp, remove old tubes, fit new tubes. Turn the bias adjustment screw for each tube anti clockwise as far as it will go. Turn on the power, and turn each bias adjustment screw clockwise until the meter is centralised. Is this correct? I do know the amp can be damaged if the correct procedure is not followed. Any help will be greatly appreciated.

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