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 NEW  Matt presents bias and operation data for the 6V6 tube in SE operation - 6V6 Single-Ended (SE) Ultra Linear (UL) Bias Optimization.

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It is currently 22 Sep 2018, 01:17

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PostPosted: 16 Feb 2018, 18:13 
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Joined: 06 Jun 2008, 18:23
Posts: 4942
Location: Australia
Matt, has specified some big high wattage resistors for this amp. They are in the cathode leg and have to handle high wattage. I couldnt source 30W resistors here so ordered some 50W 820ohm Rs from Digikey. The postage was more than the Rs (AU$40 all up) but I needed them. I only required two but ordered four in case I build a few of these amps. Usually I do.

The rest of the components I can source here or already have. I still have to prove my PS idea for HT and filament voltages and current but feel I should have it. If the PS works out the way I hope it will there is another wine box amp I can use the PS for. I want to build a KT88 wine box amp and matching wine box speakers. The little 4" twin cone speakers I have are 92db efficient. From a SE UL KT88 amp there should be good volume. Bass may suffer a bit but the whole project is a wine box novelty. The wine box amp may come first.

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Projects: "Lagoon" - tube preamp with cathode follower | "retro-Oatley 6J6" - 6J6 push-pull headphone amp with OPTs | "retro-Hiraga" - Jean Hiraga Le Monster
Website: retro-thermionic


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