Tractrix horns with the BMS 4524L high frequency compression drivers
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Tube amps DIY
Resources for DIY audio power tube amplifiers, DIY loudspeakers
Back loaded horn loudspeaker based on FOSTEX FE206 full range drivers. 
811A Tube amp DIY project. This direct heated triode design uses the Svetlana SV811-3 Tube. DIY audio Links
Push Pull 6550 monoblocks Tube amps DIY project, by costas sarris 
DIY Wilson Audio watt puppy style loudspeaker. A DIY loudspeakers project by Giannis Mihailos. 
6L6 single ended Tube amplifier DIY project, by Christos spathopoulos
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........here Brasil, i have
........here Brasil, i have one question about the function of the R42 AND R4.........OK.ATT
juarez Mauricio