Don't worry about beer money if you're building your own or doing a group buy... I just don't want people copying the design as-is and making a profit off my work, even though the design is public domain and the most I can do is whine if it happensmbcouple said:
I'll check my e-mail now.
If someone wants to build an identical version of mine, I still have a spare PCB here taking up space. Also note post #18 in this thread; there are a few case clearance issues that have to be addressed with the current design.
I have to many TPA6120A2 laying around here,sign me up for 1PCB
What is the size of the boards?It was 4 layers?
there is this shop in Sweden.....
http://www.electrokit.se/index.php
I must admit that I´m not that good at fourlayers.From Elektrokit
The cost of doubelsided is if you order 10PCB 33.28 dollar,4 layers is 66,43.
If you order 25 PCB 4 layer is 53,12,double is 26,63
Well this might not be any cheaper but,did the company you liste have some minimi order of 25 PCB´s?
Did you have a component list?
The cost of doubelsided is if you order 10PCB 33.28 dollar,4 layers is 66,43.
If you order 25 PCB 4 layer is 53,12,double is 26,63
Well this might not be any cheaper but,did the company you liste have some minimi order of 25 PCB´s?
Did you have a component list?
Attached is a vauge Excel list of parts and the cost involved for each, and where I bought them from. It's several months old so the prices aren't accurate, and most of the 0603 resistors, some decoupling caps and other parts which I had available already aren't included.
The oscillator in the list is 49MHz, this has to get changed to the 29.xxx MHz if the AD1896 chip is used (a change I suggest you make). This still is a cheap XO, so adding a few places to solder in wires so a tent/kwak/etc module can be added in might be a good idea.
Another change that should be done on the board is the AC receptacle - the Qualtek 770W-00/02 part isn't available in low quantities from anyone that I've found. There's another one available from Digikey which the PCB can be modified for.
The board also calls for two 47uF/6.3V, 1210 package, X5R ceramic caps. You have to buy ten from Digikey but only have to order two, and at the time Digikey wanted $47 for 10! This has probably gone down in price now, but you might want to group buy these as well as PCBs
The oscillator in the list is 49MHz, this has to get changed to the 29.xxx MHz if the AD1896 chip is used (a change I suggest you make). This still is a cheap XO, so adding a few places to solder in wires so a tent/kwak/etc module can be added in might be a good idea.
Another change that should be done on the board is the AC receptacle - the Qualtek 770W-00/02 part isn't available in low quantities from anyone that I've found. There's another one available from Digikey which the PCB can be modified for.
The board also calls for two 47uF/6.3V, 1210 package, X5R ceramic caps. You have to buy ten from Digikey but only have to order two, and at the time Digikey wanted $47 for 10! This has probably gone down in price now, but you might want to group buy these as well as PCBs
Digikey or http://www.spoerle.com/web_ctrl/0,5...ll_domain_name=www.spoerle.com&domain=spoerle
seems to have them,even more companys.
Those smalest IC´s looked kind of smal,a real challenge to solder them.
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