6550 power tubes

[blackmusic]

okay... I have a mesa/boogie power amp with 6L6's in it... i want to try out some 6550's... They sound more punchy... firstly, would the 6L6 slots be able to accomodate the 6550 tubes? and if they could, would I need to get a bais readjustment?

~thanks

[eyeslikefire]

Hey Music..
Yes they will fit in the 6L6's slot and yes you will need a bias adjustment. What I don't know is if there is something else that needs to be done on the Boogie. I did it on a Carvin Valvemaster a couple of years ago with no problem.

Later.

[atomictoyz]

I had it done on a Marshall 2205, and the tech adjusted the bias, which isnt an option. I use the Groove Tube H7's, they have a little edge to them, pretty good tone. The slots for EL34's are same as well.


Peace,
Dennis

[Basil]

Originally posted by eyeslikefire
Hey Music..
Yes they will fit in the 6L6's slot and yes you will need a bias adjustment. What I don't know is if there is something else that needs to be done on the Boogie. I did it on a Carvin Valvemaster a couple of years ago with no problem.

Later.

Boogies have the bias hardset and I know they have a switch on the tremo for el34s but I think you should just call boogie and ask em.

[M.Brane]

The pinout is the same, but the 6550's will draw more current than the 6L6. Some components will likely need to be changed. Boogies are fixed-bias amps. That is they don't have an adjustment control like Fenders or Marshalls.

I doubt that Mesa would support such a swap. If it were me, I'd keep the 6L6.

Just my $.02

[Lt. Bob]

Yeah, I don't think I would do that with my amp. 6550's are a higher output tube and you could definately fry something. For sure you should check with Mesa and also Groove Tube has a lot of information on changing tube types.

[guhlenn]

boogies are 6L6 amps... i don't think changig the tubes would help your sound... possible, though expensive...

guhlenn