Tubeamp for passive Eq

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5v333

Well-known member
Joined
Jun 30, 2013
Messages
631
Location
Gothenburg
hello!

i made the New york dave passive eq with Dave´s simple tubeamp. but im considdering expanding the circuit by keeping the 6sn7 pushpull stage, add a pre-stage and some global feedback. i am hoping to get flatter freq response, less distortions, and better phase response if possible.

i have been looking at some old famous stuff and thought it would be fun to make something simmilar.

since i dont need additional gain except for negative feedback, i thought that a pair of low mu tubes would be preferable. ecc82/ecc802 seemd like a good contender.

i need to get an additional transformer for powering the heater of all tubes since my current mains transformer has an insufficiant heater winding for more than [email protected] and i have some relays and power indicator running on the same winding.


do you think this can work?


i intend to find the value of the feedback resistors from using a dual pot and check for unity gain and see what happens on scope.
 
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