Changing Tubes on Vacuum Tube Amplifiers : What is Biasing in Tube Amps?

Posted by  in Monday, March 22nd 2010   
Topics: Pro Audio    
expertvillage asked:


Learn about biasing when changing the tubes on a vacuum tube amplifier in this free video. Expert: Jeff Naylor Contact: www.Mtroniks.com Bio: Jeff Naylor is the owner and operator of Mtroniks Engineering in Mesa, Arizona. Filmmaker: Eric George

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24 Comments

teamhex said in March 22nd, 2010 at 9:06 pm    

How do you know if your amp needs it? I have this pignose I cant get to go clean. Its always slightly muddy or over driven. The guy I bought it from said the power tubes were brand new and the speaker was…..so im thinking that might be why I cant get it to go clean?

Xxsynysterg8sxX said in March 24th, 2010 at 11:24 am    

It fails if i have to watch adverts on sucha crappy video…. thumps up this if its true…

TheM3ta1Mi1itia said in March 26th, 2010 at 4:35 pm    

@InFuriatedShadows no

UnoOwl said in March 29th, 2010 at 10:59 am    

The Tube Screamer TS9 is great for pushing your amp’s gain into heavier overdrive. It tends to be very bassy on amps with a decent lower end, so you will may have to tweak some settings but it’s a great great pedal.

LordOfThisWorld74 said in April 1st, 2010 at 1:08 am    

Oh thats what your wanting. An overdrive pedal would be perfect. Try a Boss SD-1 or a Ibanez tube screamer. That will help ALOT

InFuriatedShadows said in April 4th, 2010 at 7:57 am    

@LordOfThisWorld74, think of the guitar tone of ACDC’s TNT. That’s what I get out of my amp on six with no effects. How can I push this into something like a Green Day, Iron Maiden, Judas Priest, area of gain? I dont want any shitty tinny sound, I still want my tube feel.

LordOfThisWorld74 said in April 4th, 2010 at 9:31 am    

Oh haha sorry man. Didnt notive that. I dont have much experience with distortion pedals but im pretty sure a distortion will sound the same on any amp, solid state and tube. Your gonna be running it through the clean channel anyway so its gonna be a pretty dry signal. I would personally just get a overdrive pedal. If your amp wont give you the screaming gain you want then go grab a distortion pedal.

InFuriatedShadows said in April 7th, 2010 at 7:04 am    

@LordOfThisWorld74, I have a tube amp…I said that. i was asking if the tube feel would be COMPLETELY lost if I put a distortion pedal infront of it like a Jekyll and Hyde Distortion…

LordOfThisWorld74 said in April 7th, 2010 at 5:47 pm    

You may be able to get a dual rectifier like tone out of a metal zone or something BUT your not gonna have the transparent sound a tube amp would have. Tube amps respond to your playing a and the dynamics in your playing shine through. If I was you, I would save up and get a tube amp. Check out Jet City amps or Bugera amps. They both make very cheap tube amps that sound amazing. Hope this helps

InFuriatedShadows said in April 10th, 2010 at 3:26 am    

@LordOfThisWorld74, how about a distortion pedal?

LordOfThisWorld74 said in April 11th, 2010 at 2:01 am    

Probally not unless its a tube amp. A tube screamer is made to overdrive tubes

perfuzz said in April 13th, 2010 at 11:55 am    

@InFuriatedShadows – No, not really…

InFuriatedShadows said in April 14th, 2010 at 10:40 pm    

This may be off topic, but, if i put a ibanez ts9 infront of my tube amp, will i not have that tube tone?

JEHLERS928 said in April 16th, 2010 at 5:11 am    

is it me or does he look like jack black o.O?

nasfras said in April 17th, 2010 at 1:59 pm    

This video sucs. **** wouldnt even spoon to this *** clip.

Alexselectronics said in April 20th, 2010 at 3:14 pm    

I have been looking for honest videos for vacuum tubes but all I find are the expertvillage videos.

Greensmurf said in April 23rd, 2010 at 8:25 pm    

These videos are bad enough to do that without the need for subliminal messages

wdwalter1016 said in April 27th, 2010 at 7:11 am    

Why are all expertvillage videos a minute long and not helpful at all?

adrenalize666 said in April 29th, 2010 at 2:47 pm    

As long as they dont kill my voltage values

likkamatt said in May 4th, 2010 at 7:02 pm    

Honestly, by by the sounds of snapascrew’s comment I say… never.

bigfig1900 said in May 5th, 2010 at 8:43 pm    

BEWARE! These videos are loaded with subliminal messages designed to destroy your moral values.

bigfig1900 said in May 8th, 2010 at 11:59 pm    

All these 1 minute videos are stupid? Why are they not bright enough to just make a longer video with the complete info in it? What a bunch of losers.

snapascrew said in May 11th, 2010 at 8:59 am    

Your retardedddddddddddddd tubes last so long depending on how old they are. my buddys got a high watt from the 60′s with original tubes. hes taken them out and put them on his tube tester and they still score “good”

KGB1222 said in May 13th, 2010 at 8:40 pm    

how many times you turn your amp on and it you give the tubes enough time to warm up plays the biggest roll in my opinion

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