When a tube blew

[TOGA]

Hi, may I ask, when a power tube blew while amp is running. Is it always blew some resisters with it or blew
In a great firework? Is it always ? Or I can hope that it just go silent and replacing a matched pair is all that is needed. Heard so many times about blew tube damage circuit board or take some resisters or even cause fire.

Thanks.
Toga

[TMcD]

No fireworks.

I had a K120 tube go in my Ref110, the only way I knew was I was getting some tube noise out of the right channel. In fact I kept playing the stereo for weeks. It is a bit of an operation to get the amp out of my equipment stand. When I did I saw the tube had cracked and had taken some resistors with it. It is being fixed now.

From what I understand after talking to ARC is the amp will play with a tube blown, it is just running on less power.

Hope that helps.

[ronenash]

It all depends on the amplifier design. My Beard P100 will always blow the catode resistors when a tube fails. Better designs such as Conrad Johnson have a protection fuse that will blow but the circuit should never fail and based on my experience thus far this is the case.
In the first case its usually a simple one resistor replacement but if one can not do it on his own the hassle of shipping heavy tube power amps is not a pleasent one.

[TOGA]

In this context, the amplifier of my concern is ARC Reference series, or Ref250 to be exact.
But in both cases of yours, resisters were gone following a tube failure. I am sure I will replace tubes exactly at life time limit set by ARC, but with 16 of them, some may blow
before that mark and cause some headache. Thanks Renenash and TMcD