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previous: John S. Jeff,sorry I came on so strong.I mi... -- 3/31/1999 9:42 AM View Thread

Re: Best 6L6GC for MESA Mark III

4/2/1999 12:47 AM
Steve A.
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Re: Best 6L6GC for MESA Mark III
John:  
 
    FWIW I had tried a pair of STR420's in my rebuilt BF Pro and brought them back because they were just too dark- exchanged them for another pair of the Sovtek 6L6's (which were the tubes in there when I fine-tuned the mods).  
 
    As Jeff suggested, I bet that Mesa designed those amps with the STR420's in mind: fine-tuning all of the stages so that (as you observed) the amp seems to work best with them. BTW I had a similiar experience with their 12AX7 preamp tubes (both the basic and the deluxe version). I've tried them in all of my amps and they really don't sound that good in any of them. But they work great in the Mesa amps! By designing their amps around these preamp and output tubes they can offer a consistency that you might not get with other amps (like when you replace the original tubes which have been discontinued with other brands). Once you have figured out the settings you like it can be a real hassle to have to relearn everything every time you retube!  
 
Steve Ahola  
 
P.S. Did you check the bias current when you tried out other tubes? That could have an effect, too. Even though most Mesa amps do not have a bias adjustment pot, you can still check the idle bias current to see if certain tubes are running hot or cold. (BTW does the T-O-V have the bias select switch on the back for 6L6's and EL34's? That's a great idea for people who like to switch back and forth between them.)

 
Replies:
John S. Hello Steve,yes I wrote down all of... -- 4/2/1999 4:45 AM