Replacing the 3 12ax7 tubes in simulclass 290 (red light)

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Cadavre
Bottle Rocket
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Replacing the 3 12ax7 tubes in simulclass 290 (red light)

Post by Cadavre » Mon Dec 14, 2015 9:30 pm

I've looked for threads on how to replace the 3 interior 12ax7-s in a 290 Simuclass - the threads I were related to power tubes and tube brands. I am using all Mesa tubes.

Question is how to open the 290, if required.

Would I need a hand (use a rubber mallet) impact phillips tipped tool, to remove the face plate screws? Do they need to be removed?

Any links or help appreciated.

I recall some digital board manufacturer (G4) offers source code the addresses the ports and sends interactions to the "controls" on the TA. Is there any sample source code available to connect a lap top to the TA. I am a ware of "executable" code - onrof the providers, a Brit named Tony, offers executable (compiled) code. His suggestion was I write a port sniffer. Like that's something I really GOT TIME TO DO: isolate 8 or so ports out of 128,000 ports on a 64 bit 'puter.

Triaxis
290
blackstar analog stereo ht delay
boss ce 300 analog stereo super chorus
splitter to jpoing for effects send
6 (3 x 2) passive channel analog stereo mixer summed to L/R main outs to A/B effect return on TA
rack tuner
Dynacord cls 222 analog stereo leslie simulator
Dunlop JH wah with ho-rodded inductor and true bypass
1966 strat - 1986 jap modern strait ("E" series)

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Authorized Boogie
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Re: Replacing the 3 12ax7 tubes in simulclass 290 (red light

Post by Authorized Boogie » Tue Dec 15, 2015 11:26 am

Simply unscrew the lid and remove...you will see the 12AX7's, which can be replaced the same as any preamp tube. Thanks
MESA/Boogie - Product Specialist/Customer Service - http://www.mesaboogie.com/support/index.html

Pshooter
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Re: Replacing the 3 12ax7 tubes in simulclass 290 (red light

Post by Pshooter » Tue Dec 15, 2015 11:19 pm

The screws! That's the key. PETE
triple rec
Triaxis 2:90

Cadavre
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Re: Replacing the 3 12ax7 tubes in simulclass 290 (red light

Post by Cadavre » Fri Mar 04, 2016 4:42 pm

Thanks - it's done - sounds great - except for a 200hz issue when recording:
http://forum.grailtone.com/viewtopic.php?f=13&t=71228

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