I just yesterday finished my first tube amp DIY project, and damned if it didn't work exactly as claimed.
It is "Single Ended Glory" by Eric Barbour , published several years ago in Glass Audio Magazine. It is 2 watts of gorgeous single ended sound. My Lascalas love it!
I would unhesitatingly reccomend this project to anyone looking for 45 single ended amps.
Total cost was under $600. The output iron is One Electron UBT-2's. The chokes and power trannies are Hammond. Most of the parts were bought at either Handmade electronics, or Antique Electronics Supply, both on the web.
Resistors are Vishay/Dale and Mills power resistors. Small caps are mostly Sprague orange drops. Output coupling caps are MIT Multicap. All are polyproplyne film and foil except for some large paralled mylar values in the power supply. Input and loudspeaker connectors are Cardas .Sockets are white ceramic with gold contacts. Used 45's bought off of ebay for $50.00, with a $20.00 Sylvania 6sn7gtb.
It is built in a Hammond steel 17 by 10 by 3" high chassis, with all the wiring point to point , except for the 6sn7 driver and circuitry which I etched a small pcb for to simplify construction.
The only exposed parts on top are the tubes, main power trannie, and the UBT-2's.
Not much to look at, but it sounds wonderfull. I was expecting a great midrange, with mediocre bass and soft treble. What I got was a 3d midrange, plenty of bass "whomp" at the low end, and clear extended high frequencys. Very wide soundstage, and it should get even better as it breaks in.
So far, it exceeds my expectations easily.
It isn't that great to look at,(I'll fix that later by painting the exposed screw heads on top flat black, and by building a nice oak wood base for it), but last night Jimi Hendrix played "Voodoo Child" in my living room.
mg16
It is "Single Ended Glory" by Eric Barbour , published several years ago in Glass Audio Magazine. It is 2 watts of gorgeous single ended sound. My Lascalas love it!
I would unhesitatingly reccomend this project to anyone looking for 45 single ended amps.
Total cost was under $600. The output iron is One Electron UBT-2's. The chokes and power trannies are Hammond. Most of the parts were bought at either Handmade electronics, or Antique Electronics Supply, both on the web.
Resistors are Vishay/Dale and Mills power resistors. Small caps are mostly Sprague orange drops. Output coupling caps are MIT Multicap. All are polyproplyne film and foil except for some large paralled mylar values in the power supply. Input and loudspeaker connectors are Cardas .Sockets are white ceramic with gold contacts. Used 45's bought off of ebay for $50.00, with a $20.00 Sylvania 6sn7gtb.
It is built in a Hammond steel 17 by 10 by 3" high chassis, with all the wiring point to point , except for the 6sn7 driver and circuitry which I etched a small pcb for to simplify construction.
The only exposed parts on top are the tubes, main power trannie, and the UBT-2's.
Not much to look at, but it sounds wonderfull. I was expecting a great midrange, with mediocre bass and soft treble. What I got was a 3d midrange, plenty of bass "whomp" at the low end, and clear extended high frequencys. Very wide soundstage, and it should get even better as it breaks in.
So far, it exceeds my expectations easily.
It isn't that great to look at,(I'll fix that later by painting the exposed screw heads on top flat black, and by building a nice oak wood base for it), but last night Jimi Hendrix played "Voodoo Child" in my living room.
mg16