[peranders]

Hi!

I am going to convert my QRV-04 to AD8620 + TPA6120, otherwise rather similar. The pcb will be a bit smaller.

Anybody interested in a group buy?

 

[peranders]

I have started to modify my QRV04 to fit one AD8620 and one TPA6120.

BTW: Nobody intersted in this?

 

[einolu]

those tiny resistors freak me out!

 

[peranders]

I'm not scared of those 0805, 0406 parts. What is to be afraid of? I see what you mean though. If you haven't got the right tools it's a hopeless task to solder.

 

[aos]

Asking for people to join on a group buy to solder 0406 parts is, well, futile. Why would you want to do that? Change it to larger size. Really, 1206 is the smallest size you can be reasonably comfortable with. I designed my board for TPA and have used it for months (just received the second version) and I use 0805 but could've used 1206 everywhere if I had a bit more space.

Besides, anyone who knows what 0406 is and can solder it has probably already designed their own board...

 

[DCameronMauch]

0805's is the limit of my skills.

You can get free samples of the TPAs. I did.

 

[Nisbeth]

Quote:

Originally Posted by DCameronMauch 0805's is the limit of my skills.

I agree. I believe most people should be able to solder 0805 with a bit of practice, but of course 1206 is much easier. I haven't tried 0603 or 0402 yet - one look was enough to scary me away

/U.

 

[jamont]

I think most of the folks I know on Head-Fi will tell you the same thing - 1205 is easy, 0805 is doable, smaller that that is asking for trouble. The photos on your website look very professional, but it needs to be buildable by humans.

 

[peranders]

I will use 0805 parts and the IC's will have 50 mil spacing. That will be doable. The most difficult part with SMD is parts with more than two connections, such as IC's. Even I have small problems with 0.63 mm parts!

Depending of interest I may offer soldered TPA6120 but I'll won't promise anything.

 

[damitamit]

i may be interested.

it will be a challenge to solder all those smd parts. Ive only ever soldered soic 8pin ics.

 

[aos]

TPA is easy to solder. It's a big chip, as far as SMD goes.

 

[peranders]

Quote:

Originally Posted by damitamit i may be interested. it will be a challenge to solder all those smd parts. Ive only ever soldered soic 8pin ics.

If you have managed 8 pins, 20 pins will not be any harder.

 

[peranders]

The schematics is ready and if someone is really anxious to take a peek, send me an email (not private message). The schematics will be downloadble next weekend.

http://www.sjostromaudio.com/hifi_fi...0schema_p1.pdf
http://www.sjostromaudio.com/hifi_fi...0schema_p2.pdf
http://www.sjostromaudio.com/hifi_fi...0schema_p3.pdf
http://www.sjostromaudio.com/hifi_fi...0schema_p4.pdf

 

[peranders]

The pcb layout is very near to be ready now

 

[aos]

peranders, your website is out of order

.