Hello all...
First, here is 2 pictures of a assambled board:
They have been playing daily at my home now since i got them and they do sound great, and works great! Heat is no problem, the servo-circuits keep each LM's dc-level to a minimum keeping them cool.
In fact I have a deliverance scheduled at 21 juli from a pcb-manufactor, 250 pcs. The differens from these boards is onboard regulators for the 15V, but mainly the layout is now non-inverting, instead of my current inverted once. This is to get the input-impedance to a higher level (47k). But, these 250 pcs is allready booked to a bunch of swedish forum-members. But if they work well then I will for shure order more boards and offer you guys.
Rendered image of board below:
So anyway, you'll have to wait a bit longer...
First, here is 2 pictures of a assambled board:
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
They have been playing daily at my home now since i got them and they do sound great, and works great! Heat is no problem, the servo-circuits keep each LM's dc-level to a minimum keeping them cool.
In fact I have a deliverance scheduled at 21 juli from a pcb-manufactor, 250 pcs. The differens from these boards is onboard regulators for the 15V, but mainly the layout is now non-inverting, instead of my current inverted once. This is to get the input-impedance to a higher level (47k). But, these 250 pcs is allready booked to a bunch of swedish forum-members. But if they work well then I will for shure order more boards and offer you guys.
Rendered image of board below:
An externally hosted image should be here but it was not working when we last tested it.
So anyway, you'll have to wait a bit longer...
kanifee said:
One up and running, not a complete board but still, they are working
An externally hosted image should be here but it was not working when we last tested it.
I had no LM337T so the cables on the right side is extarnal -15V
Due to other lack of components I where only able to mount one section (of 3). I also had to skip the buffer at the input.
Im using TL071 instead of LF411 at the servo-circuit, works great. I have also skipped the resistor at the output, not needen when only one LM3886 is used.
An externally hosted image should be here but it was not working when we last tested it.
Listening-impression is great and simular to rev 1. Although I have only used an mp3-player as source. The heat is no issue, you can easily thouch the LM3886 after 20 minutes of full volume and keep the finger there. I would guess it's temperature is arround 35 celcius.
Calle,
nice to see ... still my questions for once more:
Due of waiting ... would you share your gerbers or even eagle files of both versions here (with/without 15V supply) ?
Do you have a link to your swedish forum to get some more impression to your board / Layout ?
Would be very nice if you would / could / want to share it
I'd appreciate your answer
Thanks in advance
Regards
artQuake
nice to see ... still my questions for once more:
Due of waiting ... would you share your gerbers or even eagle files of both versions here (with/without 15V supply) ?
Do you have a link to your swedish forum to get some more impression to your board / Layout ?
Would be very nice if you would / could / want to share it
I'd appreciate your answer
Thanks in advance
Regards
artQuake
Really great, CJ900R
Congratulations!
Where did you get those PCB, you said?
Congratulations!
Where did you get those PCB, you said?
An externally hosted image should be here but it was not working when we last tested it.
lineup said:
The boards are made by me in Eagle. Ordered the PCBs from www.pcbcart.com. A good source that is reliable and fast with good support.
Im still happy with the boards but have noot ordered any more. I will soon, but I have so much work now. Im working in Sweden one week, then in Belgium next week, and I will do so for 2 months time now.
Here is latest image of one board that I play on daily. External +/- 15V still since I have not ordered any LM337 yet.
An externally hosted image should be here but it was not working when we last tested it.
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