Changing tubes.

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gregtarr
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Changing tubes.

Post by gregtarr »

Ok. I currently have number 7 Groove Tube 6L6's in my JCM 900. Say I was playing at a gig when a tube went - how would I go about changing a tube without electrocuting myself. This is assuming I had a spare! (for those that don't know, you can replace Groove Tubes of the same type without rebiasing as long as they are the same number (or so I am told)).
I don't really want 600 volts running through my arm.

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Re: Changing tubes.

Post by angry_young_poet »

gregtarr wrote:I don't really want 600 volts running through my arm.
maybe you should unplug the wall socket first? :D

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Post by Bg »

yep and leave to cool or wear some asbestos gloves.
So, is that low alcohol or no alcohol at all? mmmm, no alcohol, do you want to try it? Noooooooooo.

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Post by Rog »

Don't be a girly guitarist, mate!!

Just whip the dead one out and plug the new one straight in.

You could turn the power off if you were really worried.

Can't get electrocuted doing this - unless you wrap your fingers round to the pins - even then its only a tickle!
He hit a chord that rocked the spinet and disappeared into the infinite ...

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Post by gregtarr »

Says Rog who uses solid state amps. Maybe it's ok for you, but all the pictures of dinosaurs look to me like they have kind of thicker skin than me! I'm scared that you just want to see a charcoal picture of me in your newspaper. "hahaha" you'd say "that'll teach you for having a non-strat, non-purple, WOODGRAIN guitar! Now to get the rest of you's"
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Post by Rog »

LOL - Bugger - you saw through my little ruse...
He hit a chord that rocked the spinet and disappeared into the infinite ...

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Post by Bg »

.....and all that was left is a pair of smoking boots.
So, is that low alcohol or no alcohol at all? mmmm, no alcohol, do you want to try it? Noooooooooo.

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Post by angry_young_poet »

Rog wrote:LOL - Bugger - you saw through my little ruse...
you are sneaky rog.. that's what a purple dinosaur does.. we expect it..

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Post by goldtop0 »

All I can say is don't do it with your teeth.............that's why Jimi did it only on his guitar :wink:
Another alternative is to have another stack at the ready..............well they all did it in the 60s :?
Doin' that scrapyard thing.

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Post by Rog »

Back when thermionraptors ruled the world, I used to have valve amps, of course. When a bottle died, I'd change during a song (rest of band kept going - drum solo etc) just whip the amp onto standby and use a handkerchief to hold the hot bottle and replace - turn standby back on and start playing again.

Worked for me.
He hit a chord that rocked the spinet and disappeared into the infinite ...

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Post by stark »

What part of a tube amp is it that if you touch it, even after the plug has been pulled outta the wall, you die? Is it the capacitor(s)? :?
this one's special, this is the ultimate, after this i'll never need another amp, EVER...Image
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Post by Rog »

Yes, the electros store a decent charge. I used to short them out with a screwdriver back in the day, although a better way is to connect a high value resistor across it and let it all bleed down first.
He hit a chord that rocked the spinet and disappeared into the infinite ...

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Post by Bg »

ah the old screwdriver to earth method - simple but effective :)
So, is that low alcohol or no alcohol at all? mmmm, no alcohol, do you want to try it? Noooooooooo.

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Post by Rog »

Yes, you could normally tell when it had been done by the little scorch marks and pitting on the chassis.
He hit a chord that rocked the spinet and disappeared into the infinite ...

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Post by ash »

I died once when I leaned on 600V worth of residually charges Jansen bassman.... But I got better :D

Minor burn on the hand and a hell of a shock....
http://ashcustomworks.com for custom built electric guitars hand made in new zealand

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