A Baby ZV2...?
Having no measurement tool, I mathematically estimated the ac current ratio between R1 and R13/14 of ZV2 (of 30V dc-supply). I got 55.2941%. I did this just for a DIYer¡¯s fun.
By the way, I am stepping back to reduce the bias current from 2 to 1.32A. It is mainly to lower the heatsink temperature. The work for this would be easy by applying 0.5 ohms for all of R1, R13 and R14. Sure, it is a must that I should get back to the 50% ac current ratio, either by replacing R15 with 700 ohms or by replacing R6 with 3.3k ohms.
Meanwhile, I have the following questions.
(A)
This tweak must be worsening the distortion character. Is it however OK if I stay within 8W output, for a 4-ohm speaker?
(B)
If no, what could be menimum bias current for the (A) to be practical?
(C)
Which is better, replacing R15 or R6?
Your advice before I kick my ... would much appreciate.
JH
Having no measurement tool, I mathematically estimated the ac current ratio between R1 and R13/14 of ZV2 (of 30V dc-supply). I got 55.2941%. I did this just for a DIYer¡¯s fun.
By the way, I am stepping back to reduce the bias current from 2 to 1.32A. It is mainly to lower the heatsink temperature. The work for this would be easy by applying 0.5 ohms for all of R1, R13 and R14. Sure, it is a must that I should get back to the 50% ac current ratio, either by replacing R15 with 700 ohms or by replacing R6 with 3.3k ohms.
Meanwhile, I have the following questions.
(A)
This tweak must be worsening the distortion character. Is it however OK if I stay within 8W output, for a 4-ohm speaker?
(B)
If no, what could be menimum bias current for the (A) to be practical?
(C)
Which is better, replacing R15 or R6?
Your advice before I kick my ... would much appreciate.
JH