Link for this?anybody
please give me mic,line pre amp link
thanks
http://www.diyaudio.com/forums/solid-state/167363-mic-line-eq-preamps.html
Regards
B500
Hi,Apex.
I had discovered why my B500 little buzz on speakers when there is no music. My computer is generating that sound. When I disconnect cinc, it stops.
Can amplifier work with 2SB817/2SD1047, BD249/BD250 transistors without changing anything, with lower voltage? I have some supplies of those transistors.
Hi,Apex.
I had discovered why my B500 little buzz on speakers when there is no music. My computer is generating that sound. When I disconnect cinc, it stops.
Can amplifier work with 2SB817/2SD1047, BD249/BD250 transistors without changing anything, with lower voltage? I have some supplies of those transistors.
See post #40, and in thread http://www.diyaudio.com/forums/solid-state/164630-50w-mosfet-amplifier-irf540-irf9540-3.html you can also see post #23. Can you post some pictures? What speakers you use, and how its sound with B500 compareing with another amps?Hi,Apex.
I had discovered why my B500 little buzz on speakers when there is no music. My computer is generating that sound. When I disconnect cinc, it stops.
Can amplifier work with 2SB817/2SD1047, BD249/BD250 transistors without changing anything, with lower voltage? I have some supplies of those transistors.
Regards
Last edited:
B500 is stronger then most amplifiers I had build before.
Great sound on hifi speakers, used Pioneer and EI Nis for Hi-fi test.
And Eminence Kappa 18" and Delta 12" LF for PA test.
Will post pictures in a few days.
I had look you posts, this amplifier is just like B500 but with 2SB817/2SD1047 transistors and 2K2/5W resistors. Are there any change in pcb?
Great sound on hifi speakers, used Pioneer and EI Nis for Hi-fi test.
And Eminence Kappa 18" and Delta 12" LF for PA test.
Will post pictures in a few days.
I had look you posts, this amplifier is just like B500 but with 2SB817/2SD1047 transistors and 2K2/5W resistors. Are there any change in pcb?
Attachments
You can use B500 pcb for B250,B500 is stronger then most amplifiers I had build before.
Great sound on hifi speakers, used Pioneer and EI Nis for Hi-fi test.
And Eminence Kappa 18" and Delta 12" LF for PA test.
Will post pictures in a few days.
I had look you posts, this amplifier is just like B500 but with 2SB817/2SD1047 transistors and 2K2/5W resistors. Are there any change in pcb?
Regards
Improper shielding
Check your cable quality also. Even when I suspected that my computer was the faulty piece, in fact, the cable I used to do the connection had improper shielding!
Regards,
Max.
I had discovered why my B500 little buzz on speakers when there is no music. My computer is generating that sound. When I disconnect cinc, it stops.
Check your cable quality also. Even when I suspected that my computer was the faulty piece, in fact, the cable I used to do the connection had improper shielding!
Regards,
Max.
And pcb of Apex 120 with BDE83/84.
One of my technics of making PCB:
1.print PCB on paper
2.Use iron to transfer print(lines) on PCB
3.put pcb with paper in cold water
One of my technics of making PCB:
1.print PCB on paper
2.Use iron to transfer print(lines) on PCB
3.put pcb with paper in cold water
Attachments
I don't know.
1.Use laser printer. Select dark option when you print.
2.best paper is for pictures, but i use average business paper 80gr./A4 and it work fine for me.
3.Iron must be very hot,you mush press for 7-8 min. and more...
4.Then put PCb in cold water
Watch on youtube:
YouTube - Making PCBs using Toner Transfer
1.Use laser printer. Select dark option when you print.
2.best paper is for pictures, but i use average business paper 80gr./A4 and it work fine for me.
3.Iron must be very hot,you mush press for 7-8 min. and more...
4.Then put PCb in cold water
Watch on youtube:
YouTube - Making PCBs using Toner Transfer
Nice work, and what is your PSU specification?Hi, Apex.
Pictures of my B500.
Regards
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