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Old 23rd March 2010, 10:21 PM   #121
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Default Apex h750

Here is PCB for APEX H750.
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File Type: jpg APEX H750 Component layout.jpg (846.6 KB, 3565 views)
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Old 23rd March 2010, 11:35 PM   #122
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Default apex h 750

apex
how can we make a balanced input for h-750
do you have a circuit
or modification
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Old 23rd March 2010, 11:50 PM   #123
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apex
can i use D5LC20
this is 3 pin dual diode ultra fast
16 a 200v prv
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Old 24th March 2010, 12:19 AM   #124
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Default XLR input

Circuit for XLR (balanced) input, and level control.
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Old 24th March 2010, 12:23 AM   #125
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Quote:
Originally Posted by engel dela pena View Post
apex
can i use D5LC20
this is 3 pin dual diode ultra fast
16 a 200v prv
U can use this diode on H900 V2 PCB.
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Old 24th March 2010, 12:28 AM   #126
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apex
thanks
how about psu schematic
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Old 24th March 2010, 12:32 AM   #127
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See post #67 for PSU.
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Old 24th March 2010, 12:44 AM   #128
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Default psu

apex
5 terminal must be from transformer the center must be ov,terminal 1,2,4,5 must be the x-former 4x40v
the other four terminal must be dc with discharge resistor,which is for +/-6o?and +/-120?
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Old 24th March 2010, 12:48 AM   #129
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Quote:
Originally Posted by engel dela pena View Post
apex
5 terminal must be from transformer the center must be ov,terminal 1,2,4,5 must be the x-former 4x40v
the other four terminal must be dc with discharge resistor,which is for +/-6o?and +/-120?
Yes, I will post schematics soon.
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Old 24th March 2010, 12:57 AM   #130
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Default class h power supply

http://www.crownaudio.com/pdf/amps/grbgpapr.pdf
crown amp patented the class g
and qsc the class h
do they have the same psu?
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