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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Tube amps DIY by costas sarris is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 United States License.
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All OPTs in all my projects
All OPTs in all my projects are custom made designs. Primary impedance of the OPTs in this project are 3400 ohm / 60W /400mA. About the UL taps in this project, 20 % of the primary winding is common to the anode and screen-grid circuit.
cheers !
costas