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In Reply to: RE: Removing the input coupling caps?? posted by Tweaker456 on August 19, 2014 at 13:22:00
If you want an intelligent critique of someone else's design, you should at least include some information on the design to be critiqued. Maybe even a circuit diagram?
Follow Ups:
It's tube headphone amp with one 5670 per channel going out to the transformer. Tweaker
That's still not enough information.
For example, maybe the cathode of the 5670 is grounded, and a battery is used to bias the grids. If this is the case, I would leave the cap in.
If the cathode is biased with a resistor, LED, transistor, or regulator, then there's certainly the possibility that you can remove the capacitor without any harm.
"Did the designer put these basterds in because of an abundance of caution, it really being unnecessary for modern inputs??"
The answer to that requires a technical critique of the circuit. And, as Paul said, no one can do that unless you take the time to provide a schematic (and maybe answer a few questions after we look at it).
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