VH4 slightly humming in ch3/4

  • Thread starter Thread starter bronz79
  • Start date Start date
bronz79

bronz79

New member
Hi,
From a week ago i've noticed that my vh4 slightly hum in channel 3/4.
It is a very suble hum,i hear that only when i roll off the guitar volume and always
after at least 30 minutes of playing.

I put it on stand by..replace power and hum disappers. :confused:

Power tubes are 6 months old,
preamp are ruby and thay have 15 days.

I've changed preamp tubes from v1 to v4 with no effort.

Maybe a preamp soket ruined? :(
 
No ideas? :cry: :D

I've made some test and i've found that the little hum appears only when i play
with the vh4 placed on the cabinet that i use now,fender 2x12 supersonic waiting
for Diezel 4x12.
If I put the head on on without playing no hum,if i put the head not over the cabinet also no hum.
So i'think is realated not to heat issue but to vibration issue of the cabinet.
 
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