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Old 9th November 2010, 10:35 AM   #41
jamal is offline jamal  Singapore
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the Zobel network is already there. the heating problem is already over. I dont know what is the problem. I just reroute the V+ V- and grd. by the way there are still hum at maximum volume.
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Old 9th November 2010, 11:13 AM   #42
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Originally Posted by doggy View Post
The LM3875 does not get much attention, I have 3 others LM3886,LM4780, the 3875 is my favorite and it also has the best bass.
I built both LM3875 and LM3886 to compare, couldn't tell the difference.

Both kits are for sale cheap in the swap meet, if anyone wants to do their own comparison
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Old 9th November 2010, 02:28 PM   #43
jamal is offline jamal  Singapore
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hahaha finally there is no hum in my amp. you know wat? the hum come from my CD player. ok case close.
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Old 24th November 2010, 10:16 AM   #44
navin is offline navin  India
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Quote:
Originally Posted by linuxguru View Post
especially since the LM3886TF is north of $7 at retail here.
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Originally Posted by linuxguru View Post
I'm looking at it, now that the LM3886TFs are becoming unobtainium.
A friend of mine got me 4 x 3886TF in Bangalore for Rs. 1450 ($30) incl. VAT.

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Originally Posted by linuxguru View Post
In short, the 3875/76 can give better results with relatively poor layouts and components (including point-to-point wired gainclones), but the 3886 is more rugged with better dynamics.
I intend to test this using the same schematic (ESP Project 19) in a few weeks. using running of a 300VA 18-0-18 transformer (24V DC). Just waiting for the 3886 to arrive in Mumbai.

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Originally Posted by jimbo1968 View Post
I built both LM3875 and LM3886 to compare, couldn't tell the difference.
It seems that the 1875 and 3886 are sorta for different applications. The 3886 with it's 7A current capacity is better for small subwoofers (if used singly) and can handle low impedance loads a bit better. Sonically the 1875 is nicer for fullrange, widerange (100Hz to 20kHz) applications where some of the grunt work is being done by a subwoofer amp.
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Old 24th November 2010, 05:14 PM   #45
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Originally Posted by navin View Post
A friend of mine got me 4 x 3886TF in Bangalore for Rs. 1450 ($30) incl. VAT.
Ouch - that's ~Rs.360 each, about the same as EBay pricing. It was about Rs.165 each at S.P.Road about 60 days ago, and started steadily climbing from there. I stopped buying when it crossed Rs.250 locally, which was probably a mistake - there was adequate quantity available to build a a few months stockpile at that price.
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