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Cavalli EHHA Embedded Hybrid Headphone Amp - Page 122

post #1816 of 1817

Emailed Alex through the Cavalli site, he came through with a cleaner board layout. That dude rules :beerchug:

 

Anyway, since this is the only real build thread for this amp I thought it would be of some value to add the board layout here for anyone looking in the future.

 


Edited by arteom - 2/19/14 at 9:47pm
post #1817 of 1817

Hello all

 

It´s my first post and I need some help.

 

I have finished my EHHA I (MOSFET versión)) but I have an issue. R32/33 always burn. The volt. on initial checking is correct (I think):

 

R3,4= 1,5 volt

R10,14=1,5 volt

R15,17= 0,80~ 0,85 volt.

R16 & R18, R26 & R29= 0,5~0,6 volt

The voltage at pins 4 and 7 of the opamp DIP socket: +15V and -15V

Pin 6=0 volt.

 

When I turned on, the R32/33 has been burnt and I don't know what fail.

 

Where is the problem? Any idea? 

 

Thanks

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