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Mic, Line, EQ... Preamps
Mic, Line, EQ... Preamps
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Old 22nd April 2017, 05:45 PM   #611
desertstorm is offline desertstorm  Philippines
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Quote:
Originally Posted by prasi View Post
mr. andrew,
attaching herewith the schematic. its not pretty but rest assured, the pcb layout as per post 505 and the attached schematic are consistant.
regards
prasi
post#528 sir prasi tone control schematic is working good sir?
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Old 22nd April 2017, 08:57 PM   #612
prasi is offline prasi  India
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Mic, Line, EQ... Preamps
Quote:
Originally Posted by desertstorm View Post
sir frasi the schematic of yours tone contron it is working sir? thanks and regars..
Hello desertstorm,
Pl dont call me sir, I feel embarrassed. Yes the schematic is correct as confirmed by someone else, if you read the thread. But layout is not correct from analog layout principles.
I suggest you use Mr. Mile's layout and connect the volume pot after tone control.

reg
Prasi



edit here is the post . checked by linusguru, Mic, Line, EQ... Preamps
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Last edited by prasi; 22nd April 2017 at 09:00 PM.
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Old 23rd April 2017, 11:04 AM   #613
princenk007 is offline princenk007
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Post Apex EQ10 Pcb Layout

Apex EQ10 pcb and +/-15v ac-dc psu if needed. I tried to draw pcb copper side on Coreldraw for first time. It took long enough time for tracing and manual work. This is the result. I haven't had time to try this pcb yet. Hopefully there are no mistakes.
PSU needs input of 18-0-18v or 15-0-15v ac(max 1A) and output has +/-15v supply rails for connecting more preamps. I used it for MX1 and ML3.
I have flipped the image. Just print and enjoy.
EQ10 Pcb size: 125*50mm
PSU Pcb size: 87*23mm

Thank you Apex for EQ-10. we appreciate your contributions.
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File Type: zip apex eq10 a4.zip (886.8 KB, 367 views)
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Old 10th June 2017, 05:53 AM   #614
linuxguru is offline linuxguru  India
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Quote:
Originally Posted by apexaudio View Post
Use 1nF instead 3.3nF.
Regards
Here's a simulation schematic for the Apex 2-band tone control with B50k pots for the bass and treble controls. In addition to the 1 nF change mentioned above, various resistors and capacitors have their values changed to maintain a similar +/- 10 dB bass and treble adjustment as the original schematic with 10k pots. Note that the curves may not be identical, but they're designed to maintain +/- 10 dB boost/cut as well as flat (0 dB) response at center of travel for both pots. The schematic shows an OP177A opamp, but any reasonably slow JFET input opamp like TL07x will work fine. Avoid using fast opamps in this topology. Note that VR1, VR2 are shown in the schematic at center of travel (25k + 25k) for both pots.

(Of course, you can use the existing PCB layout for the 2-band stereo tone control with no change.)
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File Type: jpg apex_2band_tone.jpg (33.8 KB, 889 views)

Last edited by linuxguru; 10th June 2017 at 05:55 AM. Reason: attachment
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Old 21st June 2017, 07:56 AM   #615
sanbadgujar is offline sanbadgujar  India
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Quote:
Originally Posted by apexaudio View Post
Stereo tone control with +/-10dB bass and treble adjustment.
Hello Apex Sir

What is PCB size of this tone control, and How to use for the mono amp, What is the specification of this circuit means LOW/High cut Fuquay support.
Attached Images
File Type: jpg APEX Tone Control Stereo.jpg (205.5 KB, 841 views)

Last edited by sanbadgujar; 21st June 2017 at 07:59 AM.
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Old 23rd June 2017, 03:55 PM   #616
desertstorm is offline desertstorm  Philippines
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sir how about this is this connection is right sir pin 9 and 8 connected sir?
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File Type: jpg 1234 (1).jpg (761.2 KB, 772 views)
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Old 31st August 2017, 08:04 AM   #617
pallab is offline pallab  India
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Quote:
Originally Posted by apexaudio View Post
ML3 Schematic
Sir, how can I connect mono audio signal ? I want to use 2 ML3 for stereo output .
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Old 8th November 2017, 10:26 PM   #618
behrad is offline behrad  Iran
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hi to all
what is difference between cq and eq equalizers?and which one is better?
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Old 2nd December 2017, 09:51 AM   #619
sanyaretro is offline sanyaretro  Ukraine
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Hello Mile! I was very much interested in your microphone amplifier circuit and the fact that the microphones can be made a mixing console! I'm a musician and I do not know much about radio, but I know how to solder well! Can you help me? I've got a self-made reverb board, how do I connect the Reverb to your circuit? I know that in the mixer the rever is connected through the jack of the Aux, in parallel (feder)

Click the image to open in full size. Sincerely, Alexander!
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Old 21st February 2018, 08:38 AM   #620
desertstorm is offline desertstorm  Philippines
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Quote:
Originally Posted by apexaudio View Post
EQ10
Sir Mile can you share the schematic of EQ10 please, thank you so much in advance sir Mile more power and god bless..
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