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Post subject: Bandmaster VM tube bias
Posted: Wed Jan 11, 2012 12:00 pm
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Joined: Thu Sep 06, 2007 6:51 pm
Posts: 12
Location: Seattle, WA
Mine came with GT-6L6-R's with a white label, and it sounds fantastic with these tubes. I've played the amp daily for 3 years, and am replacing the power tubes. I'm using the same white label Groove Tubes.

1) Will I need to bias if I use the same white label tubes?
2) Does anyone have experience biasing a VM?
3) If I need to bias, can anyone point me to a how-to manual for biasing the VM model?

Thanks!

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'57 Custom Shop Strat by Art Esparza, Super Champ XD, Bandmaster VM, 212 VM cab.


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Post subject: Re: Bandmaster VM tube bias
Posted: Wed Jan 11, 2012 4:44 pm
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Joined: Fri Feb 05, 2010 4:31 am
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Yes you need to check bias . Never know if tubes are exact copy of your old ones.

How to bias Bandmaster VM ? what is VM ? Did I read somewhere "Vintage Modified " ? VM ???


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Post subject: Re: Bandmaster VM tube bias
Posted: Wed Jan 11, 2012 4:56 pm
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Joined: Fri Feb 05, 2010 4:31 am
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I just find the schematic of Bandmaster Vint Mod. It have a bias adjust pot. If you never adjust a bias before and you don't have electronic skill, leave this job to a pro. There are lethal voltage on tubes amps.
If you want , you can learn to with proper tools.


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