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On A Hippie Trail, Head Full Of Zombie
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Old 14th January 2020, 12:06 AM   #71
2 picoDumbs is online now 2 picoDumbs  Australia
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I don't think you will hear a difference.
I just prefer silver cause it will help me sleep better at night knowing I won't need to be replacing the cables for a bloody long time, if ever.
I have some speaker cables that are green. It's easy replacing external speaker cable, not so easy replacing wire in the amp chassis. I prefer low maintenance.
If I didn't use silver plated, I would use tin plated.
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Old 14th January 2020, 10:37 AM   #72
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Measuring properties of ECW20N20 and ECW20P20.
I had already done this years ago but the results are on my laptop that is dead, so doing it again.
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Old 14th January 2020, 12:15 PM   #73
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Results of Vgs Threshold (Id = 2.5mA) testing.

ECW20P20
0.53V x 2 out of 20 devices
0.55V x 18 out of 20 devices

ECW20N20
0.14V x 20 out 20 devices

You won’t get this level of matching out of any mosfets I am familiar with.
The whole curves match just as well from my memory of my previous testing results.

I will do complete curves of Id vs Vgs later (maybe tomorrow)
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Old 23rd January 2020, 06:51 AM   #74
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Just an update.
Almost ready to test powersupply.
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Old 23rd January 2020, 10:01 AM   #75
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What's the part # on those big bridges? I was looking for something similar, but couldn't find anything soft/fast recovery.

Nice shielding on the mains entry.
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Old 23rd January 2020, 10:05 AM   #76
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http://ixapps.ixys.com/DataSheet/VBO52-08NO7.pdf

I don’t know what kind of recovery it has but we will see it in FFT and can compare with the FFT of the soft recovery rectifiers in my previous build.
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Old 23rd January 2020, 04:19 PM   #77
JeffYoung is offline JeffYoung  Ireland
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A friend sent me a link to one that's a FRED:

VBE60-06A IXYS | Mouser Ireland

but dang, those suckers are expensive.

That looks like a nice chunky Ametherm behind it. You using the AS32-20010?
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Old 23rd January 2020, 09:54 PM   #78
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Quote:
Originally Posted by JeffYoung View Post
A friend sent me a link to one that's a FRED:

VBE60-06A IXYS | Mouser Ireland

but dang, those suckers are expensive.

That looks like a nice chunky Ametherm behind it. You using the AS32-20010?
Yeah. I am aware of that one, but I chose vbo52 cause I prefer the package and terminal style of it. I also like the low forward voltage drop. I can always add an RC snubber if necessary, maybe 10 Ohms, 100 nF.

Yeah the thermistors are Ametherm. I can give you the part number if you’re interested, they’re a little different than AS32
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Old 23rd January 2020, 11:37 PM   #79
JeffYoung is offline JeffYoung  Ireland
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Quote:
Originally Posted by 2 picoDumbs View Post
Yeah the thermistors are Ametherm. I can give you the part number if you’re interested, they’re a little different than AS32
Yeah, when you get a chance. I had a hard time figuring out exactly which one would be appropriate for JamJar.

I'm currently of the opinion that the AS32-20010 will be sufficient (over the AS35-20010), but I'm on a bit of a wing and a prayer.

(I'm feeding a 1.5KVA transformer which then goes to 47mF, 0R4, and 47mF on each secondary. Single thermistor in series with the primary.)
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Old 24th January 2020, 12:05 AM   #80
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MS22 20005 Ametherm | Circuit Protection | DigiKey

I am going with this one. The energy rating is better than CL60 with higher cold resistance at 20 Ohms, but similar hot working resistance to CL60.
I don’t understand their capacitance ratings since I have used over 400,000uF (200,000uF per rail) with CL60 with a 400VA transformer without issues and these are better than CL60.

I am using 500VA transformers per mono block.

I will be testing soon.
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