Mic, Line, EQ... Preamps - Page 31

DAMANHURI · 25th January 2012, 03:45 AM

Quote:

Originally Posted by QQ12e5k1

Dear Mile...
I was make a new layout of Your tone control with add a XLR con for mic input...I got a plan to make 4 ch mixer with 2 mono input and 1 stereo input but I don't know how to add effect and another block like master and balanced output...
Can You help me to make my simple mixer??

Regards

May I know what software you use to design this pcb layout? I saw exactly the same as pcb software which is designed apexaudio.
Can you help me to address a free download
regards

44250 · 29th January 2012, 10:28 AM

Quote:

Originally Posted by apexaudio

Is anybody interesting about 100w guitar amp?

Mic, Line, EQ... Preamps #32 #35 #37

Here it is,it is assembled but it has 7VDC offset on the output. I´ve done something wrong,and now i am going to seek for a mistake. A few pictures:

44250 · 29th January 2012, 01:31 PM

No mistake found-it works just fine! I was doing it last night in my garake and it must be my multimeter gone wrong due to low temperature (-7 / -8°C) , or there was metal splinter doing some shortcut on his own. I don´t know what was wrong,but it works now. I also found out that i have one NE555,so there will be one more APEX,this time as a protection circuit!

Now the only thing i should do is to learn how to play electric guitar!

Thanks mr.Mile Slavković APEX , one more time!

QQ12e5k1 · 1st February 2012, 03:16 AM

How to add this echo circuit with your Apex ML3??

Regards

QQ12e5k1 · 7th February 2012, 09:33 AM

Quote:

Originally Posted by apexaudio

No, there is several mistakes.
Regards

Can You show me the mistake??

Regards

formula 22 · 8th February 2012, 08:11 AM

Quote:

Originally Posted by soro

How about this one.

headphone Amps or Preamps.

Hi soro!
Please display the schematic of this hybrid headphone amplifier.

Tanks you!

blafioras · 9th March 2012, 09:35 PM

Hello, sir Mile. I build your guitar amp, but I do not know what kind are these capacitors:

In the schematic are given without polarity, but this value seems a tantalum capacitor. I dont know what exactly is ? Please help me, or if it is not important and i dont need to put them. Thanks and Best Regards.

apexaudio · 10th March 2012, 07:45 AM

Quote:

Originally Posted by blafioras

Hello, sir Mile. I build your guitar amp, but I do not know what kind are these capacitors:

In the schematic are given without polarity, but this value seems a tantalum capacitor. I dont know what exactly is ? Please help me, or if it is not important and i dont need to put them. Thanks and Best Regards.

This caps are bipolars
Regards

blafioras · 14th March 2012, 09:53 AM

Hi sir Mile,i cant find exactly 16 volt bipolar caps and i put same with 100volts, which I guess is not a problem except for size. All look normal and final stage work (mean the drivers and MJH11018/17), but my input is line-out, rather than input. In the ''Input'' i dont have any brum and also to pin 3 on TL072. I have signal just on C14 / 33n, and Line-out. The 2 diodes 1n4148 on the input have +/-16 volts. In facts i guess that the preamplifier and adjustments do not work. I dont see any mistakes in the PCB assembly or elements. If you have any idea where can be the problem, I will be happy. Thank you.

blafioras · 14th March 2012, 10:05 AM

Hi Mile, i cant found 16v/33uf, so i put 100v/33uf, i think that thereis no problem except the size. All look normal, the pcb assembly/elements and final stage work( the drivers Mjh11017/18, but my input is line-out, rather than input. I have noice(brum) on C14/33n and ''Line-out'' - input, but not in ''Input'' jack. I check the voltage in 2diodes 1n4148 and there is normal +/- 16v. In facts the preamplifier and the corections doesnt work. If you have any idea or you see some mistakes on the pcb or elements, please help me. Thakns.

9th March 2012, 09:35 PM	#307
blafioras diyAudio Member Join Date: Oct 2011	Quitar Amp Hello, sir Mile. I build your guitar amp, but I do not know what kind are these capacitors: In the schematic are given without polarity, but this value seems a tantalum capacitor. I dont know what exactly is ? Please help me, or if it is not important and i dont need to put them. Thanks and Best Regards.

14th March 2012, 09:53 AM	#309
blafioras diyAudio Member Join Date: Oct 2011	Problem :( Hi sir Mile,i cant find exactly 16 volt bipolar caps and i put same with 100volts, which I guess is not a problem except for size. All look normal and final stage work (mean the drivers and MJH11018/17), but my input is line-out, rather than input. In the ''Input'' i dont have any brum and also to pin 3 on TL072. I have signal just on C14 / 33n, and Line-out. The 2 diodes 1n4148 on the input have +/-16 volts. In facts i guess that the preamplifier and adjustments do not work. I dont see any mistakes in the PCB assembly or elements. If you have any idea where can be the problem, I will be happy. Thank you.

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14th March 2012, 10:05 AM	#310
blafioras diyAudio Member Join Date: Oct 2011	Hi Mile, i cant found 16v/33uf, so i put 100v/33uf, i think that thereis no problem except the size. All look normal, the pcb assembly/elements and final stage work( the drivers Mjh11017/18, but my input is line-out, rather than input. I have noice(brum) on C14/33n and ''Line-out'' - input, but not in ''Input'' jack. I check the voltage in 2diodes 1n4148 and there is normal +/- 16v. In facts the preamplifier and the corections doesnt work. If you have any idea or you see some mistakes on the pcb or elements, please help me. Thakns.