previous: marrk I have used a .50 cal for gigging f... -- 1/2/2000 10:46 PM

Re: Modification for Mesa Boogie .50 Caliber

1/3/2000 8:33 PM

Andy

Re: Modification for Mesa Boogie .50 Caliber Hi     Thanks for your sugestion, but i'm aware that all amps   sound at their best when crancked up.   The "buzzy" sound i refer to is also present when crancked up.   I have tried all kinds of tubes and it has already cost me an   arm and a leg doing so.   There are five 12AX7A Mesa tubes installed at the moment and   four Groove tubes EL-84S (6BQ5) powertubes, bias rating #5.   The .50 Caliber you had was probably a .50 Caliber+ which   indeed uses 6L6 powertubes and has a lead master pot,and sounds very different from my version (i've A/B tested this!)   However the preamp-section should be virtualy the same.   I have tried it with an extention cabinet.   I should mention that it is extremly sensitive when any effects-unit   (Rocktron, Lexicon it doesn't matter)is connected in the send en return-   jacks and overloads quickly and is therefore practicly unusable.   Maybe there is something wrong here, but i don't know how i can check   it for tolerable values (voltage, dB's).   It has always been this way but i never cared for amp overdrive or effects before.   If somebody has got some sugestions i'll be glad to here of them.     Regards Andy

 

Replies:

marrk Right, mine is the .50+. I also ha... -- 1/3/2000 10:10 PM GFR Replace the "boost" tube with a 12A... -- 1/4/2000 10:01 AM