DAC turbo (Off Topic)

by soundcheck , Germany, Tuesday, September 05, 2006, 10:12 (6442 days ago) @ goon-heaven

Hi Steve.

I have a "One piece silver contact" 15A type of switch. Which counts for 0,003R.
And connectors are Neutrik Speakon < then 0,002R per leg. Makes 4 legs.
So it should be less then 0,008R two ways for the connector.
Gives you a total of approx. 0,01R. Fair enough. I could not find
any lower values. Some people were recommending Power-Fets as switches.
I was afraid that they introduce more noise to the whole circuit. I left them out.
I do not have the system fuse proteced! That's a NoGo for me. Good to be DIYer.
I gotta trust my own work. Though I installed a fire protector above the system. You never know.

Klaus.

All connector contacts are of course cleaned and treated with Walker Audio
Extreme SST! To improve the contact resistance even further.

Klaus

Hi Klaus,s

Its all about the batteries ESR. I'd guess that your battery still

has 20-30mR ESR.

No idea of its ESR. It has a specified internal resistance of 9mR, but
that will be DC, I guess.

Unfortunately it seems that one needs a real big battery to get that

far

down. But I figured that every mR counts on the supply rail.
Without switch and connector it was perfect. The pity is - there is no
way
around these you have to have them in! It is just do dangerous without
switch and connector.

Yes, I see the difficulty. So what difference in ESR does adding your best
switch and connector make?

I am buffering with 8*470uF + 0,2uf (BG NONpolars) and a 1000pF ceramic
(0805 Type with silver leads - DIY).

Thanks. I guess I have some room for improvement here too.

Best regards
Steve

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