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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 28 Sep 2020, 23:53

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PostPosted: 15 Sep 2020, 18:00 
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Joined: 13 Jan 2018, 21:33
Posts: 343
Location: australia
Hi Bruno, I followed the method on this website http://diyaudioprojects.com/Technical/B ... alculator/ to achieve a 4 dB reduction and I posted on The DIY TL Facebook page for advice. You may prefer to use a metric version or convert imperial inches to SI units.

I initially thought I should go with the full 6db, but as I have the speakers in a small room 10m^2 approx and close to the wall, there is likely to be some bass reinforcement from the room. I didn’t use a zobel circuit in this case. The inductor and resistor I could get locally were 1mH and 3.9 ohms. The resistor value precision is low though measuring 4.2. I’m still to try the approx 2 and 3 ohm resistors yet but I think 4 ohms is about right given my Vb compromise.


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PostPosted: 16 Sep 2020, 01:27 
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Joined: 03 Jun 2020, 11:06
Posts: 75
Location: France
Fine Woodo, I see - Thanks ! :idea:

I'll have a look to your inputs when I'll be back home. ;)

Cheers,

-tbln

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