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Old 7th January 2012, 03:37 PM   #1
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Default Cheshtap Power Amp

Hi cheshtap,
can u tell me what are the diodes i pointed in the pcb image.
thank u.
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Old 7th January 2012, 06:06 PM   #2
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i found the diode number -HER204,
hard to buy this diode.
any substitute for this diode?
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Old 8th January 2012, 03:55 AM   #3
khalsa is offline khalsa  India
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sir 1n4007
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Old 8th January 2012, 09:51 AM   #4
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Default DIODE

FR 207 FR307
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Old 8th January 2012, 11:43 AM   #5
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Quote:
Originally Posted by khalsa View Post
sir 1n4007
khalsa i dont think so in4007 is substitute for her204.
her204 50ns 2a, in4007 1a and lot of difference.
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Old 8th January 2012, 11:45 AM   #6
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Originally Posted by andrewlebon View Post
FR 207 FR307
thanks andrew.
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Old 8th January 2012, 01:08 PM   #7
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is this amplifier actually working ????

----can anyone expect 25amps per rail to pass from such a thin trace ( from fuse holder to the input pin ? )

---- 16 outputs will work without base resistors ?? if so this something i see for the first time ....

---- then again when you built such a big amp distributing the outputs full pcb size from side to side ...to gain space between transistors is the best way to go so heatsink may be able to dissipate heat better and faster ....


there is a few other things ....
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Old 8th January 2012, 03:05 PM   #8
HighTec is offline HighTec  Croatia
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Quote:
Originally Posted by sakis View Post

----can anyone expect 25amps per rail to pass from such a thin trace ( from fuse holder to the input pin ? )
+1

Copper braid or copper straps jumpers should be used. The picture shows how Ecler solved this problem in their powerful amps like PAM4100 and PAM6100. The pcb shown is actually from PAM360 but the same solution is used in PAM4100/6100 models.

Click the image to open in full size.
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Old 9th January 2012, 11:18 AM   #9
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finally i found her204 diode.
the price is us $.1 for each.
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Old 16th January 2012, 02:29 PM   #10
mj777 is offline mj777  Philippines
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Default chestap amp

hi nazirdigi, how is your chestap amp, did you made it?

regards,
Marjohn
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