• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Tell me what this is

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AmadeusMozart

Disabled Account
Joined 2009
audiowize said:
What is the purpose of C2/C3 in series? (It also seems a little odd that their values are so different than the other coupling cap)

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I wondered about this as well but in the end it turns out that it is done to prevent low frequency oscillation that potentially can occur.

source: Morgan Jones - Valve Amplifiers, third edition, bottom page 414.
 
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