Is this describing a blown tube, or two blow tubes?

@jea48 

It came on without warning, Not like in the vid.

The monoblocks are manual bias.

The old tubes are working out fine.

I emailed tube depot since these tubes were three days old.

Thanks

@jea48 

"

"Output tube bias should be set immediately when new tubes are put in; then again in 15 minutes; Did you do this before and after installing the new tubes?"

I did both of those things, yes, and Ive checked the old tubes' bias  I just put back  a few times and they have settled.

Thanks for pointing this out, just in case.

TD

@elliottbnewcombjr 

Thanks

@glennewdick 

"could also be small particles left over"

That is what I thought at first since the tube still worked. The second time there was a whistle, so certainly different.

I emailed mike sanders last night and he said it sounded like a normal tube failure and that a failed tube can work for another day until the failure is complete.

T

@jayctoy 

"And I never reinsert that tube again."

Yeah, I just figured it was a particle.

:-)

Well, Tube depot offered a refund so the quad is heading back today.

I am going to order a quad of GL 77's, but I have to go on vacation which totally sucks when there's music to listen to :-). I will be bringing my portable DSD player, but...

For the moment I have the 88's back in :-(

Thanks for the help

TD

@elliottbnewcombjr 

Honestly i virtually always buy a set of tubes and then I dont think about them for many years. I just dont see myself buying a tester, but I do apprecite the time you took for me. Im sure it will help another reader that can findb use for it.

thanx

T

@pdspiegel 

You raise a very important point, and yes they are designed for several different tubes including the 88's and the 34 family.

Thank you

@jjss49 

Well the only info you need is to know that I asked whether the sounds and lights described were indicitive of a tube blowing. 

Beyond that, I am using Quicksilver MidMonos with manual biasing and I did make the proper adjustments.

Thanks

@marantz33 

120's ? wow, I didn't think that was possible with MidMonos, I assume you have a more modern version than mine. I have a simpler bias mechanism than I assume you have.

I generally like to stick to Gold Lion.

T