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GainWire mk3 CFA pre/phone amp with very low distortion
GainWire mk3 CFA pre/phone amp with very low distortion
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Old 2nd November 2017, 10:20 PM   #301
JPS64 is offline JPS64  Germany
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The Printed Board Assembly (PCB + components) could be directly screwed on heatsink, bottom plate enclosure (no vias)...

The cost for metal core PCB is surprisely cheap (35m, 1.55mm thickness).

JP
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Old 10th November 2017, 11:01 AM   #302
dadod is online now dadod  Croatia
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I almost finished wiring, but encountered one big problem, input selection boards do not work, not connecting any input. This is Volume and input boards bought called Biino from diy-audio-shop.de | Platinen und mehr (Birger Maass). Unfortunately the shop is closed from this summer and no answer from Birger. Hi is a member on this forum and I've sent PM but no answer too.
The main control board I received is a bit different than the schematic in the shop and it looks when I change the input nothing was sent to the input board.
Display works correctly, even the volume control board.
I am desperate now and if, just in case, anyone has experience with this Biino I would appreciate any help.
Damir
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Old 11th November 2017, 02:56 AM   #303
Ultima Thule is offline Ultima Thule  Europe
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Quote:
Originally Posted by JPS64 View Post
First attempt using metal core PCB...

JP
Hi JP, may I know what is a "metal core PCB" and who offers these types of PCB's, I haven't heard of it before.
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Old 11th November 2017, 04:35 AM   #304
xrk971 is offline xrk971  United States
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GainWire mk3 CFA pre/phone amp with very low distortion
PCB made of aluminum or even copper substrate vs FRP for better heat dissipation for SMT devices that rely on PCB as heatsink. LED lights use this a lot. But I see now that power amps with SMT MOSFETs or BJTs would benefit as well. There is a dielectric layer between the copper trace and the board itself.
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Old 11th November 2017, 08:33 AM   #305
JPS64 is offline JPS64  Germany
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@Ultima Thule

IMS pool – Aluminiumkern-Leiterplatten-Pooling von Eurocircuits – Eurocircuits

Only single electrical layer (more = other technologie see Wrth) and avoid vias.

JP
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Old 11th November 2017, 11:18 AM   #306
Ultima Thule is offline Ultima Thule  Europe
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oh I see, that's excellent these types of aluminum PCB's have become more mainstream, probably the explosion of LED market have pushed it in favor to us diy'ers, I have to admit I am so badly updated these days, thanks for the info, vielen dank!
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Old 20th November 2017, 06:58 PM   #307
rsavas is offline rsavas  Canada
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Quote:
I am desperate now and if, just in case, anyone has experience with this Biino I would appreciate any help.
How can we help when we have no info on this design. I see on the web site some pcbs and a mcu.
Biino | diy-audio-shop.de
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Old 20th November 2017, 07:11 PM   #308
xrk971 is offline xrk971  United States
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GainWire mk3 CFA pre/phone amp with very low distortion
JP,
Is that a GW Mk3 in SMT?! Wow you are fast. It had no label and looks so different I couldn't be sure - but based on parts count, it is I believe a GW Mk3.

Click the image to open in full size.
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Old 20th November 2017, 08:39 PM   #309
dadod is online now dadod  Croatia
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Quote:
Originally Posted by rsavas View Post
How can we help when we have no info on this design. I see on the web site some pcbs and a mcu.
Biino | diy-audio-shop.de
This is Biino control board, volume board and input board.
http://www.diy-audio-shop.de/produkt-kategorie/biino/
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Old 20th November 2017, 10:06 PM   #310
rsavas is offline rsavas  Canada
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http://www.diy-audio-shop.de/produkt-kategorie/biino/
still need to know a bit more about the
Quote:
The main control board I received is a bit different than the schematic in the shop and it looks when I change the input nothing was sent to the input board.
like where is the schematic you refer to.
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