So I need modified my old tone control.
Other question, can I use this cicuit as mic preamp after increase gain?
My Apex A class PSU is missing some transistor to complete. I run Apex ML2 without it and it still sounded good. please tell what you feel about my PSU using Transistor 7915,7815 and 4 Elna 3300uf 25v 10a diodes
2 pic of Apex ML2 preamplifier in Computer PSU
2 pic of Apex ML2 preamplifier in Computer PSU
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Change the pots
Hey!
I would like to change the pots in this pcb to be 100k, what would i need to do in order to change them? I have two versions of the pcb if it helps.
Thanks a lot, regards!
Hey!
I would like to change the pots in this pcb to be 100k, what would i need to do in order to change them? I have two versions of the pcb if it helps.
Thanks a lot, regards!
Shouldn't that dual-gang pot for BALANCE be a special model, with no variable resistance half of the way (each channel contrary to the other)?
Hi Apex,
Thanks for the 3 band circuit. Can you post PCB layout diagram for home etching? Is the freq response similar to ML3?
Thanks Again.
Thanks for the 3 band circuit. Can you post PCB layout diagram for home etching? Is the freq response similar to ML3?
Thanks Again.
project mixer
only one board(signal in) tested and worked fine. ouput and phone pcb are not tested but will work fine.for full mixer you need desire input channel and two l and r output module they are same but only difference in jumper wire and ic 2073 can be replace with tda 2822.one can use phantom 48 v with nc point and one extra switch.enjoy.
only one board(signal in) tested and worked fine. ouput and phone pcb are not tested but will work fine.for full mixer you need desire input channel and two l and r output module they are same but only difference in jumper wire and ic 2073 can be replace with tda 2822.one can use phantom 48 v with nc point and one extra switch.enjoy.
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Sorry to disagree.I have built Apex two band tone control and its the best circuit i have ever built.Many followers are there for Apex's designs and he is very generous to share PCB design with all.So no negative comments pls
I'd love to see this list of wrong projects that you have built and tested. Before blaming the designer, why not post pictures of you build and give folks a chance to help you though it?
Sometimes, it seems that the circuit is not working, but if you look again thoroughly, you will find out the glitches.Mostly, its simple mistakes that we fail to look through..... As for myself, I had unknowingly misplaced diode polarities, missed wrong ground connections etc. and sat long hours thinking about the DC output coming out.
Once you patiently solves the errors, it becomes obvious that apex designs are the best. That's my personal experience.... I learned to make the F100 this way and its my favorite amplifier from that time on....... 🙂 In fact, all the audio guys in my area likes apex amps than commercial systems. Once they see these, they like it very much and says that these amps provide the exact quoted power and performance...
Once you patiently solves the errors, it becomes obvious that apex designs are the best. That's my personal experience.... I learned to make the F100 this way and its my favorite amplifier from that time on....... 🙂 In fact, all the audio guys in my area likes apex amps than commercial systems. Once they see these, they like it very much and says that these amps provide the exact quoted power and performance...
Hi all, i want to make this low pass filter. Has anyone the pcb for this project? I`ts very simple for me to make it. Thanks in advance !
http://i64.tinypic.com/9i9pqf.jpg
http://i64.tinypic.com/9i9pqf.jpg
project mixer
hi sir rohin,
it has been years of reading on diyers post and i had built some like the apex b500 and it works fine.
i had built a 6 channel mixer using ne553* and tl07* few years back but it was given to a friend coz they like it. unfortunately i've lost my design and have no time to draw from schematic to pcb layout.
may i ask a permission to try your design and if so pls post for a much higher resolution of your mixer project. in pdf, cdr or any format that i could read values of the components..
thanks
regards,
sam
hi sir rohin,
it has been years of reading on diyers post and i had built some like the apex b500 and it works fine.
i had built a 6 channel mixer using ne553* and tl07* few years back but it was given to a friend coz they like it. unfortunately i've lost my design and have no time to draw from schematic to pcb layout.
may i ask a permission to try your design and if so pls post for a much higher resolution of your mixer project. in pdf, cdr or any format that i could read values of the components..
thanks
regards,
sam
hi sir APEX
im planning to have a little mixer using
ML3
MX1
and this PSU i have changed the zener into 15V is this posible?
these are the only components i able to purchase.
i suppose to do the A Class PSU but not all devices are available esp BF245/2sk246 even the 1uf MKT/MYLAR caps only electrolytic are available so i tried this layout but need your advice..
currently i am using ML3 on my AMPs with 7815 & 7915 still excellent performance than my tone from esp and sam.
i am not an electronics guy just a hobbyst
please help me out
thank you..
regards...
im planning to have a little mixer using
ML3
MX1
and this PSU i have changed the zener into 15V is this posible?
these are the only components i able to purchase.
i suppose to do the A Class PSU but not all devices are available esp BF245/2sk246 even the 1uf MKT/MYLAR caps only electrolytic are available so i tried this layout but need your advice..
currently i am using ML3 on my AMPs with 7815 & 7915 still excellent performance than my tone from esp and sam.
i am not an electronics guy just a hobbyst
please help me out
thank you..
regards...
