VH4 CH2 problem,please help-solved-

[frantic77]

i turned my amp on,played ch1 and switched to ch2 but there wasn't any sound.
what might that be!what is the problem?
any suggestion will be much appreciated!

thanks in advance!

BTW the other channels work fine!

 

[Ventura]

i turned my amp on,played ch1 and switched to ch2 but there wasn't any sound.
what might that be!what is the problem?
any suggestion will be much appreciated!

thanks in advance!

BTW the other channels work fine!

A preamp tube popped? When the amp is on, check all preamps to see if they're somewhat equally lit. But this is weird - is it DEAD quiet? Any hiss? Any anything??

V.

 

[frantic77]

i turned my amp on,played ch1 and switched to ch2 but there wasn't any sound.
what might that be!what is the problem?
any suggestion will be much appreciated!

thanks in advance!

BTW the other channels work fine!

A preamp tube popped? When the amp is on, check all preamps to see if they're somewhat equally lit. But this is weird - is it DEAD quiet? Any hiss? Any anything??

V.

tubes look ok(even if they 3 years old)
dead quiet,there isnt any sound!
thanks

 

[racerevlon]

Is the loop engaged on that channel and nothing plugged in?

 

[frantic77]

Is the loop engaged on that channel and nothing plugged in?

no

 

[MARK2C]

Each 12AX7 has two tubes, or triodes in each bottle. That leaves you with a total of 14 triodes in 7 preamp tubes. Most likely the second side of your V1 died and the other side
for the clean channels is alive. Try a new V1 and V3.

 

[frantic77]

since i don't have any spare pretubes at home,may i just swap and change V1 with another Vx tube to be secure which one might be the bad tube?

 

[MARK2C]

Sure, try swapping V1 with V2. If channel 2 works, you know it's a bad v1. There is a 50/50 chance Channel 4 will or will not work then if the tube in V2 has a bad triode.
V2 uses only half of the tube.

 

[frantic77]

Sure, try swapping V1 with V2. If channel 2 works, you know it's a bad v1. There is a 50/50 chance Channel 4 will or will not work then if the tube in V2 has a bad triode.
V2 uses only half of the tube.

thanks a lot

be back soon

 

[frantic77]

ok guys,it's dark here now.i can clearly see that v3 preamp tube has only one triode light not 2 as the other tubes.
that might be the problem.
i have to order a new preamp tube!

thanks again