I have a couple other threads on this amp, but I figure why not keep overthinking it, right? Amp is an Eden E300T 300W tube amp (same as WTB300V). Original OT was bad, I am trying to put in an SVT CL transformer into it. Looking at the schematics, the Eden amp took the FB point off the 8 ohm tap. The SVT transformer doesn't have an 8 ohm tap, only 4 and 2. It seems like this would affect the feedback ratio, essentially reducing the feedback by a factor of 2. I think it reduces it because a 4 ohm tap will be lower voltage and higher current than an 8 ohm (right?) and the feedback is voltage based, not current, but I am not sure, and therefore I ask.
Looking at the schematics it looks like the feedback comes back to the same point in the circuit (the cathode of the first PI stage), but they do have a different voltage divider ratio there. Eden also uses a 12AT7 instead of a 12AX7 like the SVT, but not sure if that would also affect it.
WTB_300V.zip
93_SVT_CL.zip
Thanks in advance,
Greg
Looking at the schematics it looks like the feedback comes back to the same point in the circuit (the cathode of the first PI stage), but they do have a different voltage divider ratio there. Eden also uses a 12AT7 instead of a 12AX7 like the SVT, but not sure if that would also affect it.
WTB_300V.zip
93_SVT_CL.zip
Thanks in advance,
Greg
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