"The Marv". Named after my dad who instilled in me a love for building things. Most of the tools I used (drill-press, mill, punches, bits, etc.) were his, as were a handful of the parts (the biasing socket, lamp socket and jewel). Not an hour went by working on this when I didn't think of him and yeah, that's one of the main reasons I built it. And now, I think of him every time I fire it up.
In spring of 2010, I rekindled my love for vacuum tube audio. I built a tube hybrid headphone amp based on an open source design and it sounded amazing. By summer, I started designing and prototyping a tube based hi-fi power amp from scratch - No borrowed schematics just classic techniques, math, CAD and trial & error (see 2010 postings). To log my daily progress, lessons, and results, a blog seems to be a natural tool. If you find it interesting - cool! If not, well, go back to Facebook.
Monday, June 11, 2012
Some final pics of "The Marv"
(click on a pic to enlarge)
"The Marv". Named after my dad who instilled in me a love for building things. Most of the tools I used (drill-press, mill, punches, bits, etc.) were his, as were a handful of the parts (the biasing socket, lamp socket and jewel). Not an hour went by working on this when I didn't think of him and yeah, that's one of the main reasons I built it. And now, I think of him every time I fire it up.
"The Marv". Named after my dad who instilled in me a love for building things. Most of the tools I used (drill-press, mill, punches, bits, etc.) were his, as were a handful of the parts (the biasing socket, lamp socket and jewel). Not an hour went by working on this when I didn't think of him and yeah, that's one of the main reasons I built it. And now, I think of him every time I fire it up.
Sunday, June 10, 2012
OK, my first amp has been usable for over a year. It's provided plenty of aural joy and thermionic warmth to my chilly basement, however, I hadn't actually glued or oiled the wood frame, added feet or covered the power tranny. Finally, I made time. To add a mounting surface for a set of Vibrapod feet, I decided to add corners to the frame. To add strength, I dowel jointed one side of each triangular corner.
The corners are inset about 3mm to allow a perforated aluminum panel to sit inside the frame. Drill a hole in each triangle, ream a corresponding hole in each corner of the perforated panel, screw it all together and voila:
The corners are inset about 3mm to allow a perforated aluminum panel to sit inside the frame. Drill a hole in each triangle, ream a corresponding hole in each corner of the perforated panel, screw it all together and voila:
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