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Audio Note M10 Clone
Audio Note M10 Clone
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Old 8th August 2017, 09:27 PM   #11
jerrylong is offline jerrylong  China
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The size of the core is 68mm*38mm*38mm(H*W*D), the window size of the core is 42mm*12mm(H*W)IMG_5614.JPG
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Old 8th August 2017, 09:34 PM   #12
jerrylong is offline jerrylong  China
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So I have found a similar one, the size of this one is 82mm*42mm*30mm(H*W*D), and window size is 56mm*15mm(H*W)IMG_5237.JPGIMG_5238.JPGIMG_5239.JPGIMG_5594.JPG
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Old 8th August 2017, 09:44 PM   #13
jerrylong is offline jerrylong  China
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Compare this one with Tran027
Cross-sectional area of Tran: 13mm*2mm*38mm=9.88cm^2
Cross-sectional area of mine: 13.5mm*2nm*30mm=8.1cm^2
The window of Tran027:42mm*12mm
The window of mine:56mm*15mm
The Cross-sectional area of my core is less than Tran027, but window size is bigger
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Old 8th August 2017, 09:55 PM   #14
jerrylong is offline jerrylong  China
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Quote:
Originally Posted by JonSnell Electronic View Post
I made one, (a hand winding one) back in 1960. I will post a photo when next back in my workshop. It uses a counter from a pre 1960s gas meter on a short piece of bowden cable to the winder.

If you unwind the transformer, measure the wire gauge and count the turns, that is all you need to know. Laminations are widely available and off you go.
Happy days.


Thank you, it is really helpful if you can post some photo of yours. I haven't winded it yet and will measure the inductance of the core by wire a test coil
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Old 8th August 2017, 10:09 PM   #15
jerrylong is offline jerrylong  China
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Thanks for post this email for me, I have read it before, peter is mainly talking about Tran028(the new version) for M10, but can't find the schematic of new M10
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Old 8th August 2017, 10:39 PM   #16
jerrylong is offline jerrylong  China
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Quote:
Originally Posted by Koonw View Post


I have bought this OPT and used it to make my M10, but not as good as I am expected
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Old 8th August 2017, 10:41 PM   #17
jerrylong is offline jerrylong  China
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Quote:
Originally Posted by 45 View Post
33 = n^2, so it's 5.744:1.


I thought 33:1 is turn ratio, but not impedance ratio?
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Old 9th August 2017, 06:56 AM   #18
45 is offline 45  Italy
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Quote:
Originally Posted by jerrylong View Post
I thought 33:1 is turn ratio, but not impedance ratio?
Does it sound reasonable for 600R load and ONLY 110H? Not to me. It is actually rubbish!
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Old 9th August 2017, 07:23 AM   #19
TonyTecson is offline TonyTecson  Philippines
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Audio Note M10 Clone
Quote:
Originally Posted by jerrylong View Post
So I think 3.3:1 will be alright?
seems more realistic to me....or a 5:1 ratio....
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Old 9th August 2017, 07:32 AM   #20
jazbo8 is offline jazbo8
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Audio Note M10 Clone
Quote:
Originally Posted by TonyTecson View Post
seems more realistic to me....or a 5:1 ratio....
Quote:
Originally Posted by jerrylong View Post
Thanks for post this email for me, I have read it before, peter is mainly talking about Tran028(the new version) for M10, but can't find the schematic of new M10
Peter Qvortrup clearly stated "The 027 was approximately 33:1 with a CT." and the reason why they switched to the 028 - to get higher impedance, but otherwise I would guess the schematic stayed pretty much the same.
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