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Old 30th November 2011, 05:19 PM   #21
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Have you pruchased the parts yet? If you have them in front of you while you are doing the layout you can measure and play with them. This helps things go faster, reduces mistakes. How about ground plane? I would use a coper fill on top and make the bottom solid copper with the two sides connected.
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Old 1st December 2011, 03:37 AM   #22
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No firechief...I haven't bought the components yet..I'll be buying them soon.
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Old 1st December 2011, 04:52 AM   #23
tinitus is offline tinitus  Europe
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hi, maybe I missed something, but how do you intend to mount outputs onto heatsink ?
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Old 1st December 2011, 06:53 AM   #24
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Quote:
Originally Posted by tinitus View Post
hi, maybe I missed something, but how do you intend to mount outputs onto heatsink ?
Hi,
I intend to mount them on right-angled aluminium brackets.

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Old 1st December 2011, 07:55 AM   #25
Francec is offline Francec  Australia
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Why don't you just replicate Rod's layout? Obviously it works or he wouldn't have sold so many PCBs.
I've bought quite a few of his other boards and they always work. I'm listening to Rory Gallagher through several at the moment.
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Old 1st December 2011, 12:32 PM   #26
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That's a good idea...BUT!
I'm 15 yrs old and i don't get enough money that i can afford to buy Rod's PCBs!
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Old 1st December 2011, 06:42 PM   #27
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Your layout is not bad at all, components are to widely spaced, squeeze the whole amp, it will aid in shortening signal paths lengths. Your board can easily be shrunk by 50% and could look and work quite smartly.

U-Shaped heat sinks will not be good enough for your application, need something a little more substantial. Try changing R13/14 orientation because their far ends will short against the heat sink if it were mounted vertically. Also provide some securing mechanism for the heat sink, you cannot hang them off the transistors, you need some form of support.
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Old 1st December 2011, 09:03 PM   #28
Francec is offline Francec  Australia
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Default P03A Image

Here is an image of the P03A PCB from Rod's web site. The image is open to the public so I am not infringing Rod's copyright or IP. Normally, I would, and do, suggest buying Rod's boards, as I do, but a poor 15 year old needs a little bit of help.

You can use this image to use a guide for parts placement then link up the pins.
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File Type: jpg P03A.jpg (7.9 KB, 1069 views)
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Old 1st December 2011, 10:46 PM   #29
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You can be sure paranoid has been reading Rod's ESP site, and several times over! Elliott Sound Products - The Audio Pages (Main Index)
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Old 1st December 2011, 11:46 PM   #30
Francec is offline Francec  Australia
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Ian, the reason I posted the image was because I thought if the OP had seen the PCB, he/she would have made an effort to copy, to a reasonable degree, placement of parts and work from there. Seems sensible to me; why re-invent the wheel?

Frank
PS Coffs Harbour is a lovely part of the world.
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