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Author Topic: Neumann U77 supply voltage for FET  (Read 285 times)

Offline RuudNL

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  • Real Full Name: Ruud van Steenis
Neumann U77 supply voltage for FET
« on: May 20, 2018, 07:11:51 am »
I would like to know (just to check) what the supply voltage for the FET stage in a Neumann U77 should be.
More specific: the voltage over C109.
This voltage is generated by the DC/DC converter.
Any thoughts?

Offline uwe ret

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  • Real Full Name: Uwe Sattler
Re: Neumann U77 supply voltage for FET
« Reply #1 on: May 21, 2018, 03:12:35 pm »
Expect around 13 to 15 V across C109.