Bonsai’s X-Altra MC/MM Phono Preamp

[Joel Wesseling]

I went back and opened U28 and U29 - +84mv at right MC input and -14mv on the left input
At turn on they start at a few hundred mv and settle after a minute or so

 

[Joel Wesseling]

"On both those caps, the + must go to 0V"

Let me please get this one straight.. Do all of C9,10,24 and 25 + go to 0V ??

I'm seeing variations in different photos.. example my attachment is from the filter switch wiring attachment and it look wrong

 

[Zephyrin]

Hello and happy new year.
I have a question about components.

I have just order component that I found in the BOM (June 2023) but the Mom not matching with overlay on PCB!

Where is the right value ? On the PCB ?
i have just started with resistors and there are some missing value in the BOM compared to the PCB !
Perhaps I don0t have the good BOM ?

 

[Bonsai]

The ZTX951 and ZTX851 are in stock in Mouser, so you can get these devices again for the X-Altra MC/MM and I still have a few board sets left.