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Old 6th March 2014, 04:20 PM   #341
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Of course I want you to have them. PM me your address and phone (for customs) and I'll get them on their way to you shortly. I'm just a week after back surgery so it may take a bit longer than I'd like to hit the post office, but I'll try.
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Old 6th March 2014, 04:42 PM   #342
cowneko is offline cowneko  France
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Thank you so much

For your back (this is what happens when you lift Alephs too often ), I hope you'll be better soon. I know how you feel, I also got a back surgery a few years ago (L5-S1 discal hernia)..... So, please, get away from class A building for some times

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Last edited by cowneko; 6th March 2014 at 05:00 PM.
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Old 7th March 2014, 10:52 AM   #343
cowneko is offline cowneko  France
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I'm going to do another 'beginner to build...." as soon as I receive the "kari" boards, new dumb questions, photos, trial and errors to come

BobEllis: If you have the BOM at hand, can you send it to me, as I want to know if I can find the parts in Germany (want to avoid Digikey customs fees)
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Old 7th March 2014, 11:29 AM   #344
cowneko is offline cowneko  France
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Just a little question about the Bosoz, Shall I substitute the irf610 with irf630?
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Old 7th March 2014, 11:45 AM   #345
moe29 is offline moe29  United States
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It's pretty easy and fun to etch your own boards.

The Balanced Zen Line Stage is pretty much the best DIY article Mr. Pass has ever written.

A jewel in the crown


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Old 7th March 2014, 12:39 PM   #346
Zen Mod is offline Zen Mod  Serbia
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Quote:
Originally Posted by cowneko View Post
Just a little question about the Bosoz, Shall I substitute the irf610 with irf630?

yes ; little more capacitance to fight against , but nothing to worry
maybe just a bit darker sound

Quote:
Originally Posted by moe29 View Post
It's pretty easy and fun to etch your own boards.

The Balanced Zen Line Stage is pretty much the best DIY article Mr. Pass has ever written.

A jewel in the crown

.....
best ones are still not published

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Old 7th March 2014, 03:55 PM   #347
cowneko is offline cowneko  France
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How much irf61X should be paired (on Kari boards in cascode configuration)?
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Old 7th March 2014, 03:58 PM   #348
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Just two need to be matched - the ones that make up the differential pair. Fairly close matching wouldn't hurt on the cascodes, but is not necessary.

And although the boards allow for heat sinks on the differential they are not needed. Cascode limits the voltage across the differential to ~6V (10V reference - Vgs of the cascodes). It would probably be a good thing to replace the cascode voltage references with 20V zeners.

Last edited by BobEllis; 7th March 2014 at 04:02 PM.
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Old 7th March 2014, 04:00 PM   #349
cowneko is offline cowneko  France
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So two pairs (one on each boards) and as much close to each others for the 3 remaining fets
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Old 7th March 2014, 04:08 PM   #350
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The CCS stands alone, so no need to match it to anything else.
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