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Old 24th November 2012, 02:29 PM   #291
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don't worry for stability. no problem.
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Old 24th November 2012, 04:05 PM   #292
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Quote:
Originally Posted by panson_hk View Post
don't worry for stability. no problem.
Ok , thanks, than i will build with NJL4281/4302 and 5171/1930.

Marc
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Old 25th November 2012, 04:00 AM   #293
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please post your result here. have fun!
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Old 26th November 2012, 09:25 AM   #294
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Hi panson,

Parts are solderer on board only NJL are not. I have on hand heatsink that mesure 300x75mm with 40mm thick (30mmfins and 10mm base). Would one so heatsink per amp board sufficient?

Marc
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Old 26th November 2012, 11:49 AM   #295
Eddie2 is offline Eddie2  Netherlands
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If I am allowed to give an answer to that question, I would say that such a heatsink
is large enough. But, if it would still get hot, you better mount a fan in front of it.
No, NO PANIC !! It does not need to run ful speed !!
A very slow running fan makes a heatsink so much more effective, that a smaller
heatsink is large enough, (and cheeper) or keeps it much cooler.
You never hear that fan !

Kind regards,

Eddie
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Old 26th November 2012, 08:18 PM   #296
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Here they are. NJL devices will be soldered when mounting on heatsink. I have to mount LME49810 and driver heatsink too.

Marc
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Old 26th November 2012, 10:21 PM   #297
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Quote:
Originally Posted by Idefixes View Post
Here they are. NJL devices will be soldered when mounting on heatsink. I have to mount LME49810 and driver heatsink too.

Marc
Nice build! The heatsink should be big enough.
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Old 1st December 2012, 01:50 AM   #298
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Quote:
Originally Posted by Eddie2 View Post
If I am allowed to give an answer to that question, I would say that such a heatsink
is large enough. But, if it would still get hot, you better mount a fan in front of it.
No, NO PANIC !! It does not need to run ful speed !!
A very slow running fan makes a heatsink so much more effective, that a smaller
heatsink is large enough, (and cheeper) or keeps it much cooler.
You never hear that fan !

Kind regards,

Eddie
Absolutely agree with Eddie.
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Old 1st December 2012, 08:05 AM   #299
Eddie2 is offline Eddie2  Netherlands
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Thanks ! :-)
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Old 4th December 2012, 03:36 AM   #300
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Default 2nd generation board

I want to make a 2nd generation of this amp board. A Baker clamp as shown in Fig. 17.2 of Bob's book is being considered for LME49811. A sketch is show below. Any comment?
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