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Old 20th July 2014, 10:08 AM   #2991
AndrewT is offline AndrewT  Scotland
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a 65Vac transformer will five you about 90Vdc to 95Vdc
a 65-0-65Vac transformer will give about +-90Vdc to +-95Vdc (190Vdc total across the supply rails).

ClassAB will blow up your 1943/5200 transistors.
Try ClassG, or ClassH, that may allow your transistors to survive.
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Old 20th July 2014, 05:32 PM   #2992
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hi guy can i asked, i want to build apex psu 7 for my b500, can i replace bc517 and bc550 t0 2n5551?? thanks Click the image to open in full size.
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Old 20th July 2014, 11:38 PM   #2993
AJT is offline AJT  Philippines
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Quote:
Originally Posted by eper puliran View Post
sir ajt i'm using the original pairs of output 4 2sc and 4 2sa.. but i didnt try yet to supply the 85 volts dc coz i want to ask first before i try the transfoermer
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Originally Posted by apexaudio View Post
For B500 2x60vAC max, but I suggest 2x55vAC for safety operate.
best to follow designer's comments,
raising the rails while giving you more power,
does not necessarily give you more spl.
using lower rails makes your output trannies
live a little longer than with high rails...
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Old 21st July 2014, 07:05 AM   #2994
SYAHRUL is offline SYAHRUL  Indonesia
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Thnks apex...B500 all succes.
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Old 21st July 2014, 07:11 AM   #2995
SYAHRUL is offline SYAHRUL  Indonesia
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B500
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Old 24th July 2014, 08:02 AM   #2996
jaagut is offline jaagut  Philippines
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Originally Posted by SYAHRUL View Post
B500
very very nice amp, for sure!
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Old 24th July 2014, 04:35 PM   #2997
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Default Need Gerbers files for each PCB's

PDF versions of the PCB's are fine for making the PCB's yourselves at home,
but I would like to send the PCB's to a vendor. I have made PCB's myself but
I do not like the mess and nasty chemicals.

Unless someone knows how to change PDF PCB images into Gerbers or
something that software, like Eagle, etc., can understand, then I need
Gerbers files for each PCB. Another option is Group Buys for each PCB's.
Let me know what possible. Take care.
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Old 28th July 2014, 04:29 AM   #2998
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can i load this amplifier with 3 speakers sir 8 ohms each speaker..?? my supply is 54 0 54 ac 20 ampers
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Old 28th July 2014, 09:36 AM   #2999
AndrewT is offline AndrewT  Scotland
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The output from a 54-0-54Vac transformer will be somewhere around 600W to 700W into 2.7ohms.
Will the output devices and drivers survive your operations?
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Old 28th July 2014, 11:15 AM   #3000
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i have 3 speakers sir at 1000 watts each,, can this amplifier handle this..?? the amplifier wont be damage..//??
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