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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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PostPosted: 05 Mar 2017, 01:39 
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Joined: 05 Feb 2017, 00:48
Posts: 1
hi got myself a Naim NAP 200 clone kit from ali express. can someone help me with the wiring diagram and bias current settings for optimum performance please?
any tips and hints on getting the most out of this awesome amplifier would be welcome


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PostPosted: 06 Mar 2017, 19:12 
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Joined: 23 Feb 2017, 02:02
Posts: 132
Bascally you see the speaker sign and R and L.
The speaker sign means the speaker output black means ground and red means positive
https://www.aliexpress.com/store/produc ... 83417.html

You see the R L for the input audio
blue is R in
Green Is input ground
Red is L in

You have the yellow set and blue set with 28v. You supply it with two sepearate sets of 28V ac supply.

For the Bias setting you want to monitor the temp of your heat sink and slowly increacse your bias from low to high. Bascally more bias means better sound but it runs hottter and setting it too high may ruin your ampflier.
Professionally speaking you should also monitor your current input, so if the current goes super high suddendly then you should turn off.

You can tell by the demo picture with the small heat sinks this amp looks like a class B ampflifier more than a class A, the pots on the board may be for adjusting DC voltage at speakers to zero instead of adjusting the bias


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