Zashoomin

So I already noted that I was really really late to pay and I already said this in the note in paypal but better put it here as well. I sent the payment. If my order was omitted because it was so late than we can figure it out. Otherwise better late than never and thanks for doing this group buy.

Checked all the joints and resoldered all of the pzta ones. Still have the same issue. Every once in a while a big number will pop up...like its supposed to. Is it possible I have a bad transistor or that I burned one up?

Ok so I have 2 built two identical pzta board on my dynahi and I got them both biased and one I got the DC offset dialed in. It seems like a drifts a bit though but from 0+ to 0- I get around 0.7-0.3mv. I think this is fine, but on the other board it seems like I have no dc offset. Would anyone have any idea why this is? Also when I plug in the opa445 chip the right side LED dims.

I want to order some dynahi boards with the surface mount parts and was wondering if anyone has built one to make sure that everything works. If anyone wants some boards as well I think I might have a couple of extra depending on how many I order and how much interest there is. I will only be ordering the on board heat sink ones.

I was able to dial in the bais correctly by increasing the resistance to 1k. Now the DC offset is 20v. Not 20mv but 20V. I am not sure if I went overboard by changing the resistance so much or I fried some parts.

If I want to decrease bias do I need to decrease the 500ohm resistors in parallel with the 10k pots?

I biased the on board version to 0.75, and boy does the on board heat sinks get hot. How hot is everyone's heat sinks getting? Also is it normal for one set out output resistors to measure 0.75V while the other set measure 1V?

I bought one a about a month ago and got a V2. The build quality on it is fantastic and is pretty solid imo. Paint on the outside is a bit prone to scratching and fingerprints if you care about that kind of thing. Otherwise very satisfied.

I think that your khozmo pot is a 50k ohm one. I believe you want 10k if I am not mistaken.

I'll Just leave this here http://campaign.wearhaus.com/76TWE8

Email lil knight. He has some extras.

I personally think that it is because the PCB for the amp boards are so big and a bit more expenisve than the average board to stuff. I mean they aren't that big but the way they are, it would make for a very easy one chassis build or simple small 2 chassis build. also a bit part i think is that the original amp only was ever single ended.

I was also thinking about buying one to compare to the current one that I am building. Does look like I would need a different transfromer though. Apparently there is one that comes with it that is 220V.

You could try one of these as well. http://glass-ware.stores.yahoo.net/atandsise.html or you can get a VALabs one or even just settle for an alps pot(which is still better than the stock pot).

Thanks. It looks like this transformer is 24v when the power supply asks for 22v is that ok?