L
leon
New member
The 3rd channel of my herbert oscillates when a cable guitar is plugged in and the volume on the guitar is 0.
I have already exanged all the preamp tube and this does not help.
The freq of the oscillation changes by turning the gain pot, it starts at 11o'clock with 1500Hz till 500 Hz gain max.
The amp worked fine for about 1,5 year and this suddenly started last week.
could you please help me with this
leon
I have already exanged all the preamp tube and this does not help.
The freq of the oscillation changes by turning the gain pot, it starts at 11o'clock with 1500Hz till 500 Hz gain max.
The amp worked fine for about 1,5 year and this suddenly started last week.
could you please help me with this
leon
