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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: 6883B as a audio output tube posted by Freo-1 on April 9, 2015 at 13:34:11:
Update:
Made a couple of changes to enhance performance.
1) Changed out the coupling caps to Jupiter Copper Foil units. Made a signifigant improvement with the overall sonic performance. Midrange and treble sound much more open. Outstanding clarity and 3D soundstage.
2)After good feedback and additional research, dropped the bias current to 30ma to extend tube life. The sonic character of the amp did not change as a result.
The 6883B does indeed make a excellent output tube for audio, as long as one pay attention to the tube design specs. I had read in one of the old Vacuum Tube Valley that the 6146 family was initially going to be the high end audio tube for use. However, it was deemed too expensive to use for commercial audio, so Tung Sol developed the famous 6550.
Since NOS 6550's are now vey scarce, the 6883B tube is a excellent option for DIY audio.
" Don't look back. Something may be gaining on you"
Satchel Paige
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- RE: 6883B as a audio output tube - Freo-1 11:43:06 12/18/15 (0)
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