Hum if using with Tube amp

Audio
1

Anyone using the TB with Tube amp? I got no problem with SS amp except Tube amp. Other devices don’t have problem with TB either until I hook up the TB. Very loud hum

2

Does your Tube amplifier have a coupling capacitor in the input?

3

I am not sure. Attached is the schematic
With Tube amp, no problem with CD, DVD, Phono

Goldox-300-B-Schematic.jpg1024×375 57.7 KB

4

As shown in this wiring schematic, add a coupling capacitor to the amplifer circuit at the point indicated by the red arrow.

image
image.jpg1354×530 115 KB

1 Like
5

Thank you, I will have to order the cap and try later