Diamante -a discrete medium power opamp - Page 11

Russ White · 19th May 2008, 08:56 PM

A couple more notes, the layout is revision 1.2, but it is still based on the 1.1 schematic.

The bias can be adjusted via the pot, but if you wish to you can change the values of R16/R17 to get a bit more bias with less current through the VAS.

Cheers!
Russ

MrMajestic · 20th May 2008, 10:38 AM

Quote:

Originally posted by Russ White
Just about any PCB manufacturer will clip the silk around the pads. MrMajestic, make sure you ask them to do this if you want it. Even if the silk were not clipped, all the components can be soldered from the bottom where there is no silk.

I will ask Olimex about it, thanks.

peranders · 20th May 2008, 05:13 PM

A hint Russ:
It is a good idea to have the same revision on the pcb as in the schematic or at least write in the schematic which pcb layout that fits. I work at Ericsson and they have a revision system that is "a bit" over yours

Think this: I'll pick up a pcb of your and want to grab the corresponding schematic without any hesitation.

Russ White · 20th May 2008, 10:22 PM

Quote:

Originally posted by peranders
A hint Russ:
It is a good idea to have the same revision on the pcb as in the schematic or at least write in the schematic which pcb layout that fits. I work at Ericsson and they have a revision system that is "a bit" over yours

Think this: I'll pick up a pcb of your and want to grab the corresponding schematic without any hesitation.

Hah P.A. you are so hard to please.

Keep in mind this board was done just as a favor not a production thing for me.

Still if this makes you feel better:

gerbers

Now it should be clear it is the 1.1 circuit and REV 1 of the double side DIY layout.

Cheers!
Russ

peranders · 20th May 2008, 10:29 PM

Quote:

Originally posted by Russ White
Hah P.A. you are so hard to please.

I'm not particulary displeased but I see a potential problem mainly for you, getting unnecessary questions.

Compare this: A project here lacks of a reference wiring schematic/picture. How many questions have we got about hum and offset problems? What would happen if this project had in the manual with clear instructions about this? I'm sure you all know what project I mean.

MrMajestic · 26th May 2008, 09:45 PM

Just sent the files over to Olimex. Hopefully they will find them useable

This is just a test run, so the boards will be more expensive than a bigger run. Its just 6 boards in total so holler if you are interested.

MrMajestic · 28th May 2008, 09:22 PM

Just got my order form back from Olimex. Going to send payment tomorrow and hopefully the boards will turn out nice. If anyone want to try out the first run, the boards will be 15€ each plus shipping.

Russ White · 18th June 2008, 02:03 AM

MrMajestic,

How is the project going?

Just wanted to check in and see if I can help out in any way.

Cheers!
Russ

MrMajestic · 18th June 2008, 05:56 AM

Quote:

Originally posted by Russ White
MrMajestic,

How is the project going?

Just wanted to check in and see if I can help out in any way.

Cheers!
Russ

Im still waiting for Olimex to deliver the boards. I knew I should have paid up for better shipping

Thanks for you support.

MrMajestic · 23rd June 2008, 07:50 PM

Guess what showed up in the mail today

19th May 2008, 08:56 PM	#101
Russ White diyAudio Member Join Date: Jan 2005 Location: Nashville, TN, USA	A couple more notes, the layout is revision 1.2, but it is still based on the 1.1 schematic. The bias can be adjusted via the pot, but if you wish to you can change the values of R16/R17 to get a bit more bias with less current through the VAS. Cheers! Russ __________________ Less pulp more juice Twisted Pear Audio.

20th May 2008, 05:13 PM	#103
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	A hint Russ: It is a good idea to have the same revision on the pcb as in the schematic or at least write in the schematic which pcb layout that fits. I work at Ericsson and they have a revision system that is "a bit" over yours Think this: I'll pick up a pcb of your and want to grab the corresponding schematic without any hesitation. __________________ /Per-Anders (my first name) or P-A as my friends call me

18th June 2008, 02:03 AM	#108
Russ White diyAudio Member Join Date: Jan 2005 Location: Nashville, TN, USA	MrMajestic, How is the project going? Just wanted to check in and see if I can help out in any way. Cheers! Russ __________________ Less pulp more juice Twisted Pear Audio.

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26th May 2008, 09:45 PM	#106
MrMajestic diyAudio Member Join Date: May 2007	Just sent the files over to Olimex. Hopefully they will find them useable This is just a test run, so the boards will be more expensive than a bigger run. Its just 6 boards in total so holler if you are interested.

28th May 2008, 09:22 PM	#107
MrMajestic diyAudio Member Join Date: May 2007	Just got my order form back from Olimex. Going to send payment tomorrow and hopefully the boards will turn out nice. If anyone want to try out the first run, the boards will be 15€ each plus shipping.

23rd June 2008, 07:50 PM	#110
MrMajestic diyAudio Member Join Date: May 2007	Guess what showed up in the mail today

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