Hi there,
I just finished my one-case 2ch beta 22 and have some annoying hum on the output.
Also with the volume turned down completely there's some kind of hiss.
I followed AMBs wiring scheme correctly I think...
The RCA-jacks have no contact to the case and are isolated from each other.
If I have only connected the inputs to the boards (no ps-connection)
(RCA In/G -> Alps pot -> board)
there's no connection between the boards ground and case-ground
Here's all the wiring concerning the s22/power
2x V+/G/V- -> ß22 boards
G (s22) -> Neutrik locking jack
G (s22) -> GLB -> encloruse (bottom)
AC ground -> enclosure (bottom)
AC ground an GLB are not connected to the same point
When I measure betwenn the s22 ground and AC ground I get 10 ohms,
as is resistor value of the GLB is 10ohm. Same reading from the body
of the neutrik jack to the sleeve contact.
Where's the mistake?
I just finished my one-case 2ch beta 22 and have some annoying hum on the output.
Also with the volume turned down completely there's some kind of hiss.
I followed AMBs wiring scheme correctly I think...
The RCA-jacks have no contact to the case and are isolated from each other.
If I have only connected the inputs to the boards (no ps-connection)
(RCA In/G -> Alps pot -> board)
there's no connection between the boards ground and case-ground
Here's all the wiring concerning the s22/power
2x V+/G/V- -> ß22 boards
G (s22) -> Neutrik locking jack
G (s22) -> GLB -> encloruse (bottom)
AC ground -> enclosure (bottom)
AC ground an GLB are not connected to the same point
When I measure betwenn the s22 ground and AC ground I get 10 ohms,
as is resistor value of the GLB is 10ohm. Same reading from the body
of the neutrik jack to the sleeve contact.
Where's the mistake?