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Old 22nd November 2010, 12:36 PM   #971
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Quote:
Originally Posted by ravslanka View Post
hi apex

iam planning to make h900 please check the pcb layout .i have widen the tracks as pcbs
availability is of very poor quality.and also can 2 parallel 15 volts zener be used instead of 1 zy15.polarity of bf422/423 is changed will correct it.thanks in advance.


http://img526.imageshack.us/img526/8438/39092467.gif


ravs


be a vegeterian.....
I suggest to use +/-MV and 1k/2W instead 6k8/2W to get +/-15V for ICs,
Nice pcb, do you use coolets pcb as start point?
Regards
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Old 22nd November 2010, 05:05 PM   #972
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Quote:
Originally Posted by apexaudio View Post
I suggest to use +/-MV and 1k/2W instead 6k8/2W to get +/-15V for ICs,
Nice pcb, do you use coolets pcb as start point?
Regards
hi apex,
will do so as you suggest did you find any other error.and also can two 1 watt
zener be used instead of 1 2watter.yes i used some part as a reference from his
pcb.ill start etching the pcb as soon as you verify it.


thanks

ravs


be a vegeterian......
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Old 22nd November 2010, 06:23 PM   #973
sekhar is offline sekhar  India
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to ravslanka (u have done a great job)
i just love ur layout , i am gonna use ur layout, i have attached the picture of ur pcb with a few red circles whr i think the traces should be a bit thin cause producing high resolution pcbs is nt always possible and there can be shorts , so if possible reduce the track size at the indicated positions ............. and can u add few more o/p transistors if possible just to be on the safe side.

regards
sekhar
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Old 23rd November 2010, 12:03 AM   #974
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Quote:
Originally Posted by ravslanka View Post
hi apex,
will do so as you suggest did you find any other error.and also can two 1 watt
zener be used instead of 1 2watter.yes i used some part as a reference from his
pcb.ill start etching the pcb as soon as you verify it.


thanks

ravs


be a vegeterian......
I will verify final pcb, what is pcb size.
You can use one 1W zener if you use +/-MV.
Regards
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Old 23rd November 2010, 04:43 AM   #975
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for this monster amp you need a 1mm solid wire layed and soldered to the pcb track as shown in picture... light blue color traces.
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Old 23rd November 2010, 09:20 AM   #976
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Default pcb copper side

Quote:
Originally Posted by coolet View Post
for this monster amp you need a 1mm solid wire layed and soldered to the pcb track as shown in picture... light blue color traces.
Hello can you pls share your pcb on mirror/ copper side I'd like to try your design
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Old 23rd November 2010, 12:15 PM   #977
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post #659

500W PA amplifier with Limiter
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Old 23rd November 2010, 01:35 PM   #978
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Quote:
Originally Posted by Workhorse View Post
How much power do you want ?

With 2 step class-h with 1943/5200 pairs you cant increase your rails beyond 70VDC per step. Around 3.5kW could be manageable with 14-16 pairs at output for continuous duty cycle operation into 2 ohms.
h900v2 + another output pair
power is up to 3.5kw
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File Type: jpg APEXaudio H900 PCB V2.jpg (690.9 KB, 1238 views)
File Type: png TOP%20%2B%20BOTTOM%20%20LAYER%20H900[3].PNG (25.6 KB, 986 views)
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Old 23rd November 2010, 02:29 PM   #979
sekhar is offline sekhar  India
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miles what mosfet can replace irf540 that comes in plastic package like 2sc4793........??????????????????



regards
sekhar
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Old 23rd November 2010, 03:06 PM   #980
AndrewT is offline AndrewT  Scotland
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irf640 is also a To220 device.

or do you mean Toshiba's 2-10R1A package?
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