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cv wrote:

You may wish to apply similar tactics to the power supply (low DCR inductors) if you want to be really surprised...

I usually use my input chokes 4-5 times of critical inductance and twice of rated current, so it is very far form saturation. For instance the Melquíades’ output stage sucks 200mA and it uses input indictor of 10H and .5A. It has DCR of 53R. I might use 1A rated choke with lower DCR but what would be an effect. As I understand the chokes present inductance at a given current. So, when I “undercurrent” the chokes I’m loosing the effective inductance in them. Perhaps I might for my 200mA load try 20H choke at 1A but what sonic benefits I would get if I go there?

Also I would like to learn one more thing. I am planing to have a transformer for the B+ of the output stage rated at 1A. It will give me a nice spare current for 3 output stages even if I run all MF and HF hannels with dual anodes. My question is: would it be advisable to have the LF channel running it's own B+ supply? Theoretically it is class A operation and the current draw is constant but still something suggest me that I might consider this options. What would you your take on it? A separate supply with over-current transformer and a huge indictor in the filter?

Rgs,
Romy

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