Seeking NOS Mesa Boogie STR 420 6L6 Matched Quad

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Looking for an NOS quad set closely matched of the Mesa Boogie STR 420 6L6 tubes. Thank you

 

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Bump

 

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Be careful. When Mesa got the 420 from the Chinese manufacturer they leaned more towards the EL34 current draw. If you are using them in an all 6L6 Mesa or an amp with a bias pot you will be fine. I got them in my old MKIV B and they used different color codes in the outer simul socket and inner 6L6 sockets.
Learned this the hard way. Did a cleaning and pin tension service and put the 420’s in the wrong sockets. It had green dot in the middle and red dot in the outer. The inner went straight to red plating.
Unbelievable tone though when they worked.

 

[DistortED]

Be careful. When Mesa got the 420 from the Chinese manufacturer they leaned more towards the EL34 current draw. If you are using them in an all 6L6 Mesa or an amp with a bias pot you will be fine. I got them in my old MKIV B and they used different color codes in the outer simul socket and inner 6L6 sockets.
Learned this the hard way. Did a cleaning and pin tension service and put the 420’s in the wrong sockets. It had green dot in the middle and red dot in the outer. The inner went straight to red plating.
Unbelievable tone though when they worked.

Thank you for the heads up, much appreciated.