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Old 18th April 2010, 10:02 PM   #91
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Default ax14

Many posts offtopic. Here is schematics again.
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File Type: jpg APEX AX-14.jpg (161.7 KB, 4954 views)
File Type: jpg APEX KELVIN BJT PCB.jpg (167.7 KB, 4280 views)
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Old 21st April 2010, 09:31 PM   #92
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Default PA Protect

This is protect from my PA amps, can be used for Hi-Fi amps also.
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File Type: jpg APEX PA PROTECT.jpg (226.1 KB, 4694 views)
File Type: jpg APEX H900 Protect Component layout.jpg (664.6 KB, 4670 views)
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Old 24th April 2010, 10:17 PM   #93
maouna is offline maouna  Greece
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where does the PRO pin connects to??
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Old 24th April 2010, 11:05 PM   #94
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Quote:
Originally Posted by maouna View Post
where does the PRO pin connects to??
PRO pin must be connect to over-curent detector on amplifier circuit. Protect will be activeted with positive DC voltage (mosfet amp hv23), or ac voltage (PA amp B500). Unfortunaly this Hi-Fi amp have not over-curent detector circuit, and it must be add if you want use this pa protect with short-circuit protect. PA protect can work witout short-circuit protect, just not use PRO pin. Protect which I suggest early in this thread have short-circuit protect without over-curent detector on amplifier circuit. If you have no expirience to add over-curent detector circuit on this amp, is better to use this circuit.
Regards
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File Type: jpg APEX%20MOSFET%20schematics.jpg (615.2 KB, 3276 views)
File Type: jpg APEX%20B500%20SCH.jpg (438.6 KB, 2700 views)
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Old 24th April 2010, 11:20 PM   #95
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This is PSU with short-circuit protect...
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File Type: jpg APEX%20F100PSU%20PCB.jpg (762.9 KB, 2696 views)
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Old 25th April 2010, 11:05 AM   #96
maouna is offline maouna  Greece
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ok i understood .

now i am building the psu with short circuit protect,clipping,dc protect....
the pcb board is ready and now i am placing the components.
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Old 25th April 2010, 02:03 PM   #97
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Quote:
Originally Posted by maouna View Post
ok i understood .

now i am building the psu with short circuit protect,clipping,dc protect....
the pcb board is ready and now i am placing the components.
That PSU have all you need for 2x100W amp exept soft-start for transformer.
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Old 2nd May 2010, 06:59 AM   #98
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Quote:
Originally Posted by maouna View Post
ok i understood .

now i am building the psu with short circuit protect,clipping,dc protect....
the pcb board is ready and now i am placing the components.
If you use one pair outputs 0,1R/5W replace with 0,22R/5W.
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Old 2nd May 2010, 09:26 PM   #99
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In all my amplifiers input GND and power GND must be connected with separate wires. Input GND is best connect from PSU (If you not diy dual mono amp) to both input cinchs with one wire, than from cinchs to volume pots and from pots to amps inputs. GND is best to connect to case from non isolate input cinch. If you connect GND from PSU to case then input cinch must be isolated from case. With this GND wirening amp haven't any hum and noise. Speakers GND must be connect from PSU to speakers terminal with separate wires also. Zobel network (10R, 100nF) connect on amp speakers terminals.
Regards

Last edited by apexaudio; 2nd May 2010 at 09:49 PM.
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Old 7th May 2010, 07:34 PM   #100
a.wayne is offline a.wayne  United States
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Apex , what is the lowest operating voltage for your circuit.. Could this be operated at 32V ?
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