[Nebby]

Well hopefully that was a lesson learned. When multiple people tell you something is a bad idea, it's important to keep in mind that they may be right.

 

[HDMan]

 
Quote:

Well hopefully that was a lesson learned. When multiple people tell you something is a bad idea, it's important to keep in mind that they may be right.

 
I know, but I am a stubborn bugger, I gave it a good shot. Got the power supply working but the channel boards just didn't get right. I will take it to the repair shop, if they can't fix it I will sell off parts and live with the SRM-727. I could keep going with it, but I just don't have the spare time.

 

[Nebby]

 
I only ask because I'm curious, but what happened to the tech guy that was going to do the power-up and testing? Did the deal fall through?

So that any of you feel safer helping me, I will tell you that I do not plan on powering it up and testing it myself, I will have a tech guy do the final stages for me and get it running, I simply want to populate the PCB's, make the case and fit the parts accordingly.

 

 

[HDMan]

 
Quote:

 
I only ask because I'm curious, but what happened to the tech guy that was going to do the power-up and testing? Did the deal fall through?
 

 
He took a good look at it, but he wasn't confident enough in the end. He showed me how to hook up the transformer/power entry/fuse. I think I am going to quit while I am ahead, I have a repair shop that I will try, after that the parts are up for grabs. Prefer those interested from Australia. I will probably have:
 
Working Power Supply (500v)
Transformer (500v version) (AC input 240v and 100v optional)
Khozmo Quad Attenuator
Case with stax entry, power switch, xlr inputs and power entry module.
2 x channel boards (not entirely functional)
A few spare transistors and resistors.
 
The channel boards may be a simple fix for someone that is in the know.
 
Also have for sale: 2 x KGSSHV (off board heatsink) PCB boards rev0.4 and 2 x KGSSHV Power boards rev.0.6
 
 

 

[johnwmclean]

Well at least you have the guts to own up that you were out of your depth, that is admirable 

.
 
I sent you a pm.
 
 
 
 

 

[sachu]

that sucks dude..i was really rooting for you here.

 

[arnaud]

At least, you did not kill yourself, that is admirable!

 

[nattonrice]

 
 
Quote:

At least, you did not kill yourself, that is admirable!

 
 

 

[kevin gilmore]

We all know a person that did a diy T2 as his first project ever.
And got it to work. And it still works.
 
This is not something you can slap together in a couple of hours.

 

[Beefy]

 
Quote:

I know, but I am a stubborn bugger, I gave it a good shot. Got the power supply working but the channel boards just didn't get right. I will take it to the repair shop, if they can't fix it I will sell off parts and live with the SRM-727. I could keep going with it, but I just don't have the spare time.

 
I'm not going to gloat....... but I am going to berate you for giving up so damn quickly. Suck it up princess, and go through some proper troubleshooting! 

 

[spritzer]

 
Quote:

 
 
I'm not going to gloat....... but I am going to berate you for giving up so damn quickly. Suck it up princess, and go through some proper troubleshooting! 

 
Yup, you only can give up when you've swapped out all the parts that could be acting up and it still doesn't work. Then you just stuff a spare PCB to get the bloody thing working.  

 

[HDMan]

Quote:

 
 
Yup, you only can give up when you've swapped out all the parts that could be acting up and it still doesn't work. Then you just stuff a spare PCB to get the bloody thing working.  

 
Thanks Spritzer, kick in the butt was what I needed (what a cry baby, lol)

 
 
Anyways, so I took the amp to a guy and he soldered the heatsinks properly, my crappy little soldering iron wasn't cutting it, couldn't get a high enough heat.. Now I have one working front channel board and the other one, the .47/50v capacitors both of them are black roasted crispy charcoal

. I tested the other ones in that batch, they are defective.

 

[spritzer]

Did you use tantalum caps?  Some of them are directional so yeah, that will not end well.  Also stay far away from cheap caps on ebay. 
 
I used 1uf/50V Wima MKS caps in my amps because I had them and they fit perfectly.  These caps are just for local PSU filtering so pretty much anything works. 

 

[HDMan]

Quote:

Did you use tantalum caps?  Some of them are directional so yeah, that will not end well.  Also stay far away from cheap caps on ebay. 
 
I used 1uf/50V Wima MKS caps in my amps because I had them and they fit perfectly.  These caps are just for local PSU filtering so pretty much anything works. 

 
I used the .47uf/50v caps from the BOM.  http://au.mouser.com/ProductDetail/Kemet/C330C474M5R5CA/?qs=sGAEpiMZZMukHu%252bjC5l7YXvEg12wCzMcHJBU5xTZz50%3D
 
4 out of 5 are defective, go figure hey?
 
 
When you say anything works, do you mean any caps that are 50v? Please explain further.

 

[spritzer]

80% failure rate isn't normal with any part so something is very wrong somewhere else. 
 
Any non polar film cap that fits and meets 50V spec will work.  No sense in going to big in value though.