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Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, etc.

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Old 19th July 2012, 08:11 AM   #341
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Originally Posted by joexswj View Post
my preamp ML3 with standar part in lokal state
Nice work
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Old 20th July 2012, 07:09 AM   #342
joexswj is offline joexswj  Indonesia
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thanks Mr.Mile , i can learn to DIY project
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Old 7th August 2012, 03:09 AM   #343
joexswj is offline joexswj  Indonesia
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ML3 with gain, unbalance input...
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Old 13th August 2012, 04:41 AM   #344
abetir is offline abetir  Philippines
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Sir Mile,

My mains power transformer had a +/-18vac secondary winding. I would like to use it for this preamp psu design, will it maintain the +/-15vdc regulated output supply?
Can I also use TIP41C for the power regulators? and any other substitute for the TO-92 fets?

Thanks!
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Old 13th August 2012, 08:09 AM   #345
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Originally Posted by abeteer View Post
Sir Mile,

My mains power transformer had a +/-18vac secondary winding. I would like to use it for this preamp psu design, will it maintain the +/-15vdc regulated output supply?
Can I also use TIP41C for the power regulators? and any other substitute for the TO-92 fets?

Thanks!
Use 2x18vac, TIP41C/TIP42C and 2SK246 FET,
Regards
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Old 14th August 2012, 04:31 AM   #346
abetir is offline abetir  Philippines
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OK, thank you Sir.
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Old 25th August 2012, 11:05 PM   #347
abetir is offline abetir  Philippines
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Sir Mile,

Do you still have the foil pattern for toner transfer on this fan control circuit? I tried to do it manually using pen type cutter over masking tape but the result was so bad Sorry I posted it in this thread ...can't remember though to which thread I got the file.

Regards!
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Old 29th September 2012, 12:27 PM   #348
abetir is offline abetir  Philippines
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Just had the time to finish my DIY -/+15vdc pre-amp power supply...I have tested it to power an op-amp driven dc-protect works fine, only that -rail measures 15.51v and +rail measures 15.18v but I guess I placed different made TIP (transistor) devices. The other was from fairchild and the other one from ST(?).. Anyway it was the device I have in hand.

Thank You! Sir Mile!
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Old 29th September 2012, 12:33 PM   #349
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Quote:
Originally Posted by abetir View Post
Just had the time to finish my DIY -/+15vdc pre-amp power supply...I have tested it to power an op-amp driven dc-protect works fine, only that -rail measures 15.51v and +rail measures 15.18v but I guess I placed different made TIP (transistor) devices. The other was from fairchild and the other one from ST(?).. Anyway it was the device I have in hand.

Thank You! Sir Mile!
Nice job Sir,
what do you use TIP for this PSU?
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Old 29th September 2012, 02:47 PM   #350
IRSound is offline IRSound  Germany
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Smile VU TEST

APEX VU Meter Testing with 15KHz Sinusoidal waveform and woofer cooker song.

APEX VU Meter Test with 15KHz & Woofer Cooker - 1 - YouTube

Regards,
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