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Yes, I agree, but given that there's no output capacitor, I'd still check for DC before hooking up a new autoformer to it.
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"Enzo, I see that you replied parasitic oscillations. Is that a hypothesis? Or is that your amazing metal band I should check out?" -
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Hmmm.
I have a hard time reconciling "everything works now" and having 55VDC on the output.Education is what you're left with after you have forgotten what you have learned.Comment
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dont take word for word. Im an amateur and information is valuable what you get. Its because of you guys im learning these things.Originally posted by Enzo View Post
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Well, when you said "everything works" I guess we thought you meant that you connected a speaker to it and sound came out. With a 55V DC offset it would set the speaker cone on fire and shoot it halfway across the room.
So either you never tried it with a speaker, or there isn't really a DC offset. (what did you measure the voltage with respect to?)"Enzo, I see that you replied parasitic oscillations. Is that a hypothesis? Or is that your amazing metal band I should check out?"Comment
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i measured it with the multimeter. and i tried with the speaker but when i added the autoformer, the speaker started to shout electric noise realy loud and i had it on turned for one second periods, so it woudlnt start heating to muchOriginally posted by Steve Conner View PostComment
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Although late, I'd like to add something to this unfinished thread.
I guess the still bad power amp both "made some sound at the speaker" and "did not shoot the voice coil in flames across the room" (he he, nice image), *because* the autoformer was hooked, shunting to ground all those DC amperes, passing on to the speaker only the ripple (which is "a sound" after all ).
The suspicion gets reinforced by the autoformer overheating.
Maybe it's not dead yet, just making what transformers do: passing audio, not DC.Juan Manuel FaheyComment
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