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hi everyone!🙂 heres my b500, i had it tested and its loud! and i like the way it sounds...i did some component replaced since were too far from the city and components like mje340 and mje15032 is hardly available and a bit of pcb reworking🙂...
Hi..Apex...two question:
1. For soft-start supply 30VDC..are used separate transformator or from extra CT (20vac) main transformer??
2. For protector H900 (with TL 074) are used separate transformer too??
Sorry it's elementary question....😱
Pozdrav...
Protection pcb use 2x18v 1A ac from main transformer or smal separate transformer, and from protection board you can use +/-15v without gnd for soft-start.
Pozdrav
hello Apex ... been looking arround your threads ... for quiet a long time now and i like very much that most your stuff is simply made
any day i will produce one of your amps .... couple of questions though
1) have you got anything to do with smps projects
2) if so would you like to discuss a project privatelly ??
kind regards sakis
any day i will produce one of your amps .... couple of questions though
1) have you got anything to do with smps projects
2) if so would you like to discuss a project privatelly ??
kind regards sakis
apex,
yes the philippines are verry much happy because you came along at diy community
I wonder if this amp can be used in a truly professional system, I hope to use it for the middle way (between 100Hz and 2kHz)
He really can handle the heavy lifting? And sound? the good is that it already has limiter, so it's a big step, and as other protections? (Like DC and short?)
He really can handle the heavy lifting? And sound? the good is that it already has limiter, so it's a big step, and as other protections? (Like DC and short?)
See posts #241 and #111,
PA Protect include:
1 Anticlick 5sec delay
2 DC cut-out
3 Thermal cut-out on 90deg
4 Fan high speed on 60deg
5 Over current protect (power-on reset)
Conectors:
1 2x18V 500mA AC
2 +/-15V DC stab for XLR circuit
3 PRO overcurrent detect
4 Protect LED
5 Thermal sensor BD241C as diode on heatsink
6 24V DC Fan cooler (12V for low speed)
7 Speaker IN/OUT
Regards
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Pcb for this PA protect and another protection for Hi-Fi amps you can find here:
http://www.diyaudio.com/forums/solid-state/164093-100w-ultimate-fidelity-amplifier-10.html
Regards
http://www.diyaudio.com/forums/solid-state/164093-100w-ultimate-fidelity-amplifier-10.html
Regards
Thank you, I will build it with a transformer of 1200VA (for both channels) is good, ok?
One more thing, trasistores 2n5401 2N5551 can be substituted for some BC's more common, for example, BC556 ...
One more thing, trasistores 2n5401 2N5551 can be substituted for some BC's more common, for example, BC556 ...
1200VA for both channels is ok,
2N5401/2N5551 can be substituited with MPSA92/MPSA42,
Regards
ok, MPSA is easy to find
I will have no loss in quality is not it?
two other questions:
the limiter, LDR is a normal and a normal LED, some particular color?
500W at 4R?
I will have no loss in quality is not it?
two other questions:
the limiter, LDR is a normal and a normal LED, some particular color?
500W at 4R?
All answers is in my threads. Better read if you want to build.
You will have not loss in quality with MPSAs.
Regards
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