"Bevois Valley" in triode, what to do with the feedback? - diyAudio
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Old 24th April 2009, 05:14 PM   #1
pwan is offline pwan  United Kingdom
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Default "Bevois Valley" in triode, what to do with the feedback?


If I wired "Bevois Valley" in triode (using 560 Ohm Rk), what to do with the feedback?

A. Leave the current one as is
B. Remove them out ( i.e. no negative feedback)
C Adjust the value of feedback (if then, to what value?)

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Old 24th April 2009, 05:58 PM   #2
EC8010 is offline EC8010  United Kingdom
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According to the Mullard data sheet, you get 5W out of PP triode-connected EL84. In voltage terms, that's really not much different to 10W, so why not just try the feedback as is and see whether you like it?

To remove the feedback, undo the end of the feedback resistor going to the output transformer and connect it directly to ground.
The loudspeaker: The only commercial Hi-Fi item where a disproportionate part of the budget isn't spent on the box. And the one where it would make a difference...
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