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Old 21st November 2020, 09:06 PM   #13311
apexaudio is offline apexaudio  Serbia
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Quote:
Originally Posted by eremey View Post
Hello, APEXAUDIO. Tell me MM38 working scheme. He began to make a test assembly, spread the board, assembled. And the scheme does not want to work. Power supply + -24V. Is there already a ready-made board for assembly? Here's my option that I'm testing. What can be a rake?
Post voltage measurements on transistors pins.
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Old 22nd November 2020, 05:19 AM   #13312
hassan4119 is offline hassan4119  Iran
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Default A5

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Originally Posted by apexaudio View Post
A5 SCH
tnx mr mile
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Old 22nd November 2020, 09:43 AM   #13313
eremey is offline eremey  Russian Federation
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Default APEXAUDIO MM38?

Hello, APEXAUDIO. I tried to run the scheme in multisim. The result is zero. Maybe I'm not doing that? Model attached.
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File Type: zip MM38R.zip (806.2 KB, 40 views)
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Old 22nd November 2020, 10:25 AM   #13314
Yurik_V is offline Yurik_V  Ukraine
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Everything works fine without this circuit.
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File Type: png Untitled.png (6.3 KB, 219 views)
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Old 22nd November 2020, 10:35 AM   #13315
Yurik_V is offline Yurik_V  Ukraine
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Originally Posted by apexaudio View Post
All fet buffer
Mister Miele, please tell me with which letter index it is better to use the Y, GR or BL transistors.

Thanks.
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Old 22nd November 2020, 10:40 AM   #13316
apexaudio is offline apexaudio  Serbia
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Originally Posted by Yurik_V View Post
Everything works fine without this circuit.
Add reverse RIAA on input.
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File Type: jpg Reverse-RIAA-Adaptor-Schematic-Circuit-Diagram.jpg (42.5 KB, 224 views)
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Old 22nd November 2020, 11:22 AM   #13317
eremey is offline eremey  Russian Federation
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Default Mm38

Replace with a new scheme. 10,000 Hz earned. But at 1000 Hz and below, everything is curved.
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Old Today, 10:28 AM   #13318
corvo72 is offline corvo72  Italy
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Dear Mr Mile, I would like to build a strong amplifier to use for partying, which has 150W minimun of power output and cheap power transistos like the 2N3055 or similar. Could you suggest one of your schemes for this pourpose? Thank you.
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