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!🙂
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!🙂
Attachments
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!
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!
Attachments
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!
Thank You! Sir Mile!
Attachments
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,
APEX VU Meter Testing with 15KHz Sinusoidal waveform and woofer cooker song.
APEX VU Meter Test with 15KHz & Woofer Cooker - 1 - YouTube
Regards,
Hi! Damanhuri,
TIP41c & TIP42c, 2sk246 for the FETs, it was suggested by Sir Mile as substitutes.
Regards!
hi apex... can u share schema led vu display like on this amp...?.
An externally hosted image should be here but it was not working when we last tested it.
MC4558 in place ofTL072
hi sir. the filter which you are regarding is been tested by you?? how is the sound?? can we use MC4558 ic instead of TL072?? plz reply
hi sir. the filter which you are regarding is been tested by you?? how is the sound?? can we use MC4558 ic instead of TL072?? plz reply
ML3
hello apexaudio
ml3 nice sound crystal clear sound & bass ,but i m wanted more deep sound from mid .
what can i do change ? 😕
hello apexaudio
ml3 nice sound crystal clear sound & bass ,but i m wanted more deep sound from mid .
what can i do change ? 😕
Hello APEX .
I made your auto range VU and i have a question about the clipping indicator led. i tested it with a power supply of +33V and the input of the VU connected at a voltage divider. i was expecting that the red led would turn on when the voltage at the input was equal to the supply voltage of 33V,but it turned on quite lower at 26V. Why is that?
I made your auto range VU and i have a question about the clipping indicator led. i tested it with a power supply of +33V and the input of the VU connected at a voltage divider. i was expecting that the red led would turn on when the voltage at the input was equal to the supply voltage of 33V,but it turned on quite lower at 26V. Why is that?
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