New Aleph Mini PCB GB

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#643
I happened to see the attached pix. What were you going to built?
And where did you get those vertical position plastic xfmr's holders?
 

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#644
fcel said:
I happened to see the attached pix. What were you going to built?
And where did you get those vertical position plastic xfmr's holders?
Click to expand...

That Capacitor Rack is for my Aelph-X project, I made it from scratch myself. That is 2 Farads of capacitance in that rack!!

The transformer holders were also something I made up, I machined some Delron from 2" stock to fit inside the core of a my Hammond Transformers. I drilled and tapped one side and fastened them to a plate also made of Delron, imagine the letter "T". Then I drilled and tapped into the back of the faceplate, not through the plate, just about .285" the plate is about .375" thick. I also drilled and tapped a through hole for the mounting bolt to clamp the transformer on. I made two of them as this chassis is made for Dual power supplies eventually.

I also made some brackets for potted transformers as seen in the attached Photo

Regards

Anthony
 

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#648
Well I have my BrianGT Mini A's running for 72 Hours now on +/- 16VDC rails, I can honestly say I would not be afraid to touch the output FET's with my tounge!!

What I am I doing wrong???

The Rectifiers on Brian's PSU warm up nicely, the transformer warms up, first time I ever had a toroid warm up, I have 10mV DC offset on both channels.

Someone remind me how I calculate the output power again, I use the Vdrop across which resistor to figure the current draw and multiply that by the rail voltage??

Regards

Anthony
 
#650
jleaman said:
I told you ther tranny will get warm mine is a 600va and it gets warm.. also my brige rectifier gets warm too. :O ) mine are running at 18.5V Rail's and the heat sinks get warm but all is good 1 week so far up and running no problems at all. and .06mv dc off set..

J'
Click to expand...

Yeah, nice trailer post. 🙂

Can you answer my question regarding calculating output power?

Anthony
 
#653
Well I must say I am very impressed with the Mini A performace, what Detail from a 10Watt amp, My wife was listening to my favourtie Hily Cole CD with me and she asked why I had tghe centre channel speaker hooked up? I told her it was not, it's just the new amp doing an excellent job with the imaging.

Now which way do I go with R13 to crank up the Bias? I am considering going to a 15-0-15 transformer in place of the 12-0-12 ones I am running now. I have a very high AC Line Voltage here, about 122VAC. I plan on sticking with just the two FET version for now.

Any suggestions?

Regards

Anthony
 
#656
Coulomb said:
Well I must say I am very impressed with the Mini A performace, what Detail from a 10Watt amp, My wife was listening to my favourtie Hily Cole CD with me and she asked why I had tghe centre channel speaker hooked up? I told her it was not, it's just the new amp doing an excellent job with the imaging.

Now which way do I go with R13 to crank up the Bias? I am considering going to a 15-0-15 transformer in place of the 12-0-12 ones I am running now. I have a very high AC Line Voltage here, about 122VAC. I plan on sticking with just the two FET version for now.

Any suggestions?

Regards

Anthony
Click to expand...

No answers on what to do with R13 to increase Bias? Is anyone following this thread? Am I the only one who has successfully got a finished amp out of these boards?

Anthony
 
#660
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