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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 08 May 2021, 20:49

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 Post subject: Serious about tube OPT?
PostPosted: 26 Apr 2020, 11:42 
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Joined: 14 Feb 2010, 13:13
Posts: 716
Location: Lisbon, Portugal
Well this certainly deserves a look!

His webpage has also more interesting stuff!


Full PDF

Have fun! :)


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PostPosted: 27 Apr 2020, 19:05 

Joined: 23 Feb 2017, 02:02
Posts: 677 ... 240c90765b
I own one of these, the sound quality was not sastifying so I redsigned the entire amp, keeping the original tubes other than swapping out the input stage to an 12AX7
Most hillarious thing is that the cut off 3dB is arround 10-14kHZ without any feedback due to output transformer.

But the orginal schmatic puts the feedback to counter this prolbem

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