problem with my SSL 9k build (Bruno2000's project) - strange voltages

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fishdrop

Well-known member
Joined
Jul 12, 2013
Messages
89
Location
Muehldorf am Inn, Bavaria, Germany
Hey guys,

is here anybody familiar with Bruno 2000's SSL projects?

I have a little issue with my 9ks. voltages at IC22 & 29 (NE5534) on booth of my boards are not were they are supposed to be.
Pin 2 has 11,2 VDC, Pin 3 has 16 VDC
i measured these values with all socketed ICs removed from the board and signal shorted to ground at the input.
is this a normal behaviour?  :-\ it would be awesome if somebody has an idea where i can hunt the mistake.

cheers  :)
 
hey guys,

a little update.
according to the original thread's information the 9k should have 75db of gain.
i can not test it 100% accurately, but my pres give me only 24 to 25db of gain.  :eek:
mh something strange is going on.  ::)

any ideas?




 
hey thanks for helping  ;D

yes i have the schematic. it is in the attachement.

when i measure pin 4 & 7 to ground, the result is the perfect supply voltage. +/-16 VDC.
i already checked schematics, too.
pins 2 & 3 of booth ics are connected to mat02eh within the signal path.

do you think it makes sense to exchange mat02eh??
i have 2 more of them
 

Attachments

  • SSL 9K-42Sch.pdf
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