I wouldn't say genius (that's reserved for the greats in the industry) but he is pretty damn good...
Hi Troy, I think he is a great in the industry. You don't have to be affiliated to a big company to be a genius. Anyway iv'e got to go to bed. It's alright for you yanks who live in a time warp. Best regards. Barry
Bloke. I enjoy English words.
I've been reading through trying to see what Mods I'll use.
What is Yuanjing?
It seems that the majority of amplifier boards have this on them. Do they just build the boards or do they also build complete amplifier boards? How can we buy direct from them?
Is there a better deal than this?
Buy Low Price!150W LM3886*3 Channel Audio Power Amplifier Board at wholesale price - marcmart
It seems that the majority of amplifier boards have this on them. Do they just build the boards or do they also build complete amplifier boards? How can we buy direct from them?
Is there a better deal than this?
Buy Low Price!150W LM3886*3 Channel Audio Power Amplifier Board at wholesale price - marcmart
It is a bargain, but it is 3 channel Ted. Many people say they use fake parts. If that is the case, they sound very good fake parts.
I forgot to mention I will be using many drivers hooked in parallel so need to handle very low impedance. I would buy parts and build point to point if I was 30 years younger.
Oops, missed a lot of posts here. Barry, thanks for the compliments. BTW, check out my new derivative of Mauro's MyRef called the MyRef Mini. It's a 2-channel board with 2x LM1875 (2x 20W) and just about any 8-pin dual op-amp for the outer loop, and it should blow the Yuanjings out of the water when it's done. The first version of the completed schematic and PCB layout are in another thread in this forum:
http://www.diyaudio.com/forums/chip-amps/184165-mini-myref-schematic-pcb-layout.html
(Please post comments on that design there, not here - this is just a placeholder for the link to that thread.)
http://www.diyaudio.com/forums/chip-amps/184165-mini-myref-schematic-pcb-layout.html
(Please post comments on that design there, not here - this is just a placeholder for the link to that thread.)
post344,
it's not a 3channel.
Look at the input cap (singular)
It is an implementation of a PA150.
it's not a 3channel.
Look at the input cap (singular)
It is an implementation of a PA150.
Sorry Andrew, I just read the post. I didn't look at the picture. Indeed it is the PA150 build.
Buy NEW LM3886TF 2X60W Power Amplifier Board Hi-Fi DIY (1+2) at wholesale price - marcmart
Is this good value?
3PCBs, 2off lm3886, 4off 10mF smoothing and all the other bits, assembled and delivered for US$23.90
What proportion of the amplifier is faked parts?
Is this good value?
3PCBs, 2off lm3886, 4off 10mF smoothing and all the other bits, assembled and delivered for US$23.90
What proportion of the amplifier is faked parts?
At that price it doesn't matter does it? The thing is Andrew all the LM boards I have bought from China sound great, so if parts are fake, who cares. I would imagine it would cost just as much to set up the tooling etc to make fakes as it would to buy bulk. What do you think?
Appearances can deceive, especially when you don't know me in person. I wonder why you think it unfortunate that I am right.
Especially high end amplifiers need speaker protections, because they usually feed high end speakers. High end amplifier manufacturers may earn a lot of money. However they surely are not interested in spending it on paying for damages, because a cheap missing speaker protection causes speakers for umpteen-thousand currency units to burn out. Not to speak of the damage to their reputation should such a thing occur.
A list of high end amps with speaker protection would go beyond the scope of this thread. Just google '<name of manufacturer> speaker protection', if you are interested.
I won't. That µPC1237 is from the late 80s and it is certainly not the first amplifier protection ever.
"Hit me!" says the masochist and the sadist answers "Nope."
I won't give you hell, but we got as far as ASR, Burmester, Clearaudio, Einstein, Lindemann, Lua, MBL, T+A, to name just a few German amplifier manufacturers.
Don't. Use it as designated. It won't hurt, but it may help one day.
Barry, please think before you post.
LOL.
Well, Pacific, you seem to be pretty knowledgeable. When this thing comes in, I might require your assistance to make sure I don't do anything dumb.
HI all been away missed these posts!
i used separate taps +-12 from trafo to diodebridge/smoothing cap(the parts in red tape). i took dc from this.
i took the ac from one secondary at 12v.
it all worked fine but i dont think you really need it thers not much of a pop on this board.
hope it helps
i used separate taps +-12 from trafo to diodebridge/smoothing cap(the parts in red tape). i took dc from this.
i took the ac from one secondary at 12v.
it all worked fine but i dont think you really need it thers not much of a pop on this board.
hope it helps
oops!😕😕
its been a while since i built the amp(it now has a class d in that box)
the trafo has multiple seconderies.15-0-15v powering the amp.
the speaker protect was powered from 0-24v secondaries.
AC tapped from 24v
DC via the little rectifier components (in red tape).
the soft start isnt needed.i bought this for my current project multi channel amp.
its been a while since i built the amp(it now has a class d in that box)
the trafo has multiple seconderies.15-0-15v powering the amp.
the speaker protect was powered from 0-24v secondaries.
AC tapped from 24v
DC via the little rectifier components (in red tape).
the soft start isnt needed.i bought this for my current project multi channel amp.
Iv'e sold them all, mostly on ebay. The last one sold for £300. A bit cheaper than the others, but I couldn't wait to get started on another. I'm going to go with the expensive Chinese case this time as I am fed up with drilling holes! Your right, the soft start isn't needed. I'm looking for a solid state speaker protection circuit, have you ever seen one. Did you connect the pot to the jumpers? The USB interface on my last amp worked very well. I used a separate power supply and was surprised with the results. Not too far from CD quality. I think I will be getting another for my next project. It's nice to have an SD card with a large selection of music, just for parties! Let's party, but not b4 breakfast!
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