Roender's FC-100 prototype and builder's thread - Page 12

Luke · 1st January 2012, 12:16 AM

Nice work guys.

meanman1964 · 1st January 2012, 07:35 AM

Metal and Rudi,
Is it possible to use plated trough pads for the output trannies?This way we can solder them at the silkscreen.If already done,sorry for the question.

metal · 1st January 2012, 10:41 AM

Thanks Luka.

meanman, both PCBs will be double-sided, this means plated thru-hole.

roender · 1st January 2012, 11:35 AM

Rudi and Metal,

Nice job till now ... keep up!
Q: Your plan is to use only one power supply for both channels? I do not recommend that.
What's the point in making large power supply lines, grater than speaker lines? Both should have the same current capabilities

Happy New Year!
Mihai

metal · 1st January 2012, 12:39 PM

I need this PSU to be versatile, this is why you see more than one spade and pad where you expect only one, it will not only be dedicated for this amplifier. So thick lines were used, also larger caps supported.

Having a shunt-reg is a plus on the same PSU PCB, really nice.

Luke · 1st January 2012, 07:42 PM

I quite like the idea of using the power supply for another project. How hard is it to change the voltage for the frontend?

metal · 3rd January 2012, 09:27 PM

Finally, the amplifier PCB is finished, no more changes will be carried out (I hope!)

Still there are few things I have to finish on the PSU PCB after Rudi and I talk about them, and then we are done!

I hope that these PCBs find their way into DIYers hearts

roender · 4th January 2012, 07:11 AM

What's the point in making large power supply lines, to the power BJTs, grater than speaker line?
Both should have the same current capabilities

Rudi_Ratlos · 5th January 2012, 12:15 PM

Gentlemen,

METAL and I finished the layout of both the AMP- and the PSU - PCB and we are currently inspecting the GERBER files
that result from the EAGLE - .brd files.

http://www.abload.de/img/fc-amp-gerbvmhlpr.png

I checked the underlying schematics twice, compared it with ZDR's schematics and with Mihai's Spice - file:
I am very sure that the wiring is correct.

How shall we go on now?

Mihai suggested to prototype the PCBs before offering them to the community.
The minimum number of PCBs that I can order in the aimed quality is 10.
The price for an AMP PCB (size: 136 x 74mm) is 14.50€ then; the price for a PSU PCB (size: 162 x 87mm) is 15.50€.

Do you think that prototyping is necessary?
If so: will there be 4 of you (besides me) who are willing to evaluate METAL's and my version of Mihai's amplifier and buy 2 pcs of each PCB?

What colour should the PCBs have? Red, green or blue soldermask colour with white silkscreen or do you want something special for this AMP?
Black and white or white and Black?

Best regards - Rudi_Ratlos

meanman1964 · 5th January 2012, 01:17 PM

Black board red silkscreen

1st January 2012, 12:16 AM	#111
Luke diyAudio Member Join Date: Sep 2001 Location: Wellington NZ	Nice work guys. __________________ If you give a man a fish he will eat for a day. But if you teach a man to fish he will buy an ugly hat. And if you talk about fish to a starving man then you are a consultant. Dilbert

1st January 2012, 07:42 PM	#116
Luke diyAudio Member Join Date: Sep 2001 Location: Wellington NZ	I quite like the idea of using the power supply for another project. How hard is it to change the voltage for the frontend? __________________ If you give a man a fish he will eat for a day. But if you teach a man to fish he will buy an ugly hat. And if you talk about fish to a starving man then you are a consultant. Dilbert

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1st January 2012, 07:35 AM	#112
meanman1964 diyAudio Member Join Date: Oct 2006 Location: Belgium the land of chocolate	Metal and Rudi, Is it possible to use plated trough pads for the output trannies?This way we can solder them at the silkscreen.If already done,sorry for the question.

1st January 2012, 10:41 AM	#113
metal AVR & PIC C Dev. diyAudio Member Join Date: Jan 2004	Thanks Luka. meanman, both PCBs will be double-sided, this means plated thru-hole.

1st January 2012, 11:35 AM	#114
roender diyAudio Member Join Date: Sep 2006	Rudi and Metal, Nice job till now ... keep up! Q: Your plan is to use only one power supply for both channels? I do not recommend that. What's the point in making large power supply lines, grater than speaker lines? Both should have the same current capabilities Happy New Year! Mihai

1st January 2012, 12:39 PM	#115
metal AVR & PIC C Dev. diyAudio Member Join Date: Jan 2004	I need this PSU to be versatile, this is why you see more than one spade and pad where you expect only one, it will not only be dedicated for this amplifier. So thick lines were used, also larger caps supported. Having a shunt-reg is a plus on the same PSU PCB, really nice.

4th January 2012, 07:11 AM	#118
roender diyAudio Member Join Date: Sep 2006	What's the point in making large power supply lines, to the power BJTs, grater than speaker line? Both should have the same current capabilities

5th January 2012, 12:15 PM	#119
Rudi_Ratlos diyAudio Member Join Date: Jun 2009 Location: Hamburg / Germany	Gentlemen, METAL and I finished the layout of both the AMP- and the PSU - PCB and we are currently inspecting the GERBER files that result from the EAGLE - .brd files. http://www.abload.de/img/fc-amp-gerbvmhlpr.png I checked the underlying schematics twice, compared it with ZDR's schematics and with Mihai's Spice - file: I am very sure that the wiring is correct. How shall we go on now? Mihai suggested to prototype the PCBs before offering them to the community. The minimum number of PCBs that I can order in the aimed quality is 10. The price for an AMP PCB (size: 136 x 74mm) is 14.50€ then; the price for a PSU PCB (size: 162 x 87mm) is 15.50€. Do you think that prototyping is necessary? If so: will there be 4 of you (besides me) who are willing to evaluate METAL's and my version of Mihai's amplifier and buy 2 pcs of each PCB? What colour should the PCBs have? Red, green or blue soldermask colour with white silkscreen or do you want something special for this AMP? Black and white or white and Black? Best regards - Rudi_Ratlos

5th January 2012, 01:17 PM	#120
meanman1964 diyAudio Member Join Date: Oct 2006 Location: Belgium the land of chocolate	Black board red silkscreen