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Help with KT88 Bias
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<blockquote data-quote="kc2eeb" data-source="post: 145225" data-attributes="member: 811"><p>I was answering the bias question. I, personally, always have a speaker (load) connected to the secondary of the output transformer for two reasons.</p><p>First, the theory. With the power and standby on, you have around 500 volts DC across the primary of the output transformer. If you suddenly cut the DC</p><p>(This is with NO signal) you induce a pulse in the secondary. If it's connected to a speaker it has somewhere to go. Some old Fender amps had shorting speaker jacks for this reason. Better to have it shorted than open. </p><p>Second, more practically, we all make mistakes. If somehow a signal is going through the amp, you'll never know if the speaker isn't plugged in.</p></blockquote><p></p>
[QUOTE="kc2eeb, post: 145225, member: 811"] I was answering the bias question. I, personally, always have a speaker (load) connected to the secondary of the output transformer for two reasons. First, the theory. With the power and standby on, you have around 500 volts DC across the primary of the output transformer. If you suddenly cut the DC (This is with NO signal) you induce a pulse in the secondary. If it's connected to a speaker it has somewhere to go. Some old Fender amps had shorting speaker jacks for this reason. Better to have it shorted than open. Second, more practically, we all make mistakes. If somehow a signal is going through the amp, you'll never know if the speaker isn't plugged in. [/QUOTE]
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Help with KT88 Bias
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