Point-to-Point LM3886

[tigersilver]

screwdriver meter

[zygibajt]

Originally Posted by 6L6

zygibajt - Very nice so far!! I am looking forward to seeing how you make the rest of the connections.

Well it is ot so far. The amp was built some 5 years ago when the whole GC chip amps boom exploded. It is supplied with Yuasa batteries and there is the charger behind them. The black power switch does not supply power (the circuit is soldered directly to batteries) but it switches the charger to batteries on anf off both negative and positive rail so when I'm listening only the batteries are connected to circuit. In the mean time I change all the wires to Cardas chassis wires, here with Vampire Cast copper ones. By today this GC is unused and the batteries are dead after extensive use for the past years. I'm more into class A amps by today. It is extremely important to keep the loop: negative cap/chip/positive cap as short as possible hence my pictures in this post. This makes the chip way stable and not reactive to capacitive loads.

[wiatrob]

Originally Posted by 6L6

I was perusing the local electronics surplus store and saw that they had a handful of LM3886 in the bins, and thought it might be fun to wire up a pair and see how they do.

6L6,

JB Saunders? I'm heading there today...

[6L6]

Yes, it was Saunders.

No, I am not going there today, instead I'm hiking.

Do look thorough the tubes - they are selling an estate, and there is some wild stuff there lately!.

Do drop me a PM the next time you need to head that way, I would be happy to meet up there and then grab a cup of coffee and chat audio!

[wiatrob]

Originally Posted by 6L6

Yes, it was Saunders.

No, I am not going there today, instead I'm hiking.

Do look thorough the tubes - they are selling an estate, and there is some wild stuff there lately!.

Do drop me a PM the next time you need to head that way, I would be happy to meet up there and then grab a cup of coffee and chat audio!

I ended up making only a quick pass through for switches.

OT: I culled a batch of tubes right after they got the batch in, grabbed some 12BH7As and a bunch of rectifier tubes... Will touch base, Drop me a PM next time you go hiking

[merlin2069er]

I've got a spare heat sink about 4"x 6"x 2" thick. I'm going to attempt to wire it point to point, mount the lm3886 to the heat sink and use it as a cover.

I'm just a bit concerned having stuff hanging from the top of the case might cause a few headaches down the road.

[tigersilver]

lm 3886













































Too much bass as C rifa (y) 0.0047.
Improved use Rubycon photo-flash 200uf help.
voice is more clear.


Outside to some minor adjustments, including cylinders C.








Now ... the sound overall is desirable, may be change about C rifa (y) 4n7
---
If the wrong language. I'm sorry.

[6L6]

Bravo! Your builds are very well executed and have considerable style. How do you like this compared to your earlier build?

[wakibaki]

Hey, hey.

Will you guys PLEASE read Pano's blog about the posting vs. uploading of large images. It's extremely inconsiderate to post so many huge images in this way.

http://www.diyaudio.com/forums/blogs...ges-forum.html

w

[jemraid]

Hi all,

Well knock me down wiv a fevver! I thought I was the only one who made boxes from wood.



I did this in 2004 or 5 can't quite remember, anyway I used Thorsten's inverted circuit, this is my little web page about it: DIY Integrated Gainclone amplifier made in the UK from locally sourced components

Things have moved on a bit now and I'm thinking of rebuilding it to a non-inverted with a 2x 10,000 uf snubberized PS per amp. The transformers are 160VA 25V.

Great thread I love it really informative. Thanks.

Jim