Changing Tubes on Vacuum Tube Amplifiers : How to Install Pre-Amp Tubes

Posted by  in Tuesday, March 16th 2010   
Topics: Pro Audio    
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Learn how to install pre-amp 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

kmpkingshorse said in March 16th, 2010 at 7:27 pm    

if you take out an 8 pin tube, you’ll have to put back an 8 pin tube? what about in the case of a 300B, it only has 4 pins. would you need to find an amp that has 4 pins only?

I’m trying to find ‘cheaper’ brands for my power amp tube for my darkvoice 336 headphone amp, and i dont know what to put in it besides two that people have mentioned, the western 421A and tung sol 5998. other than that..what else can go in there?

bob505470 said in March 17th, 2010 at 10:06 am    

look around. all tubes will sound different. find one that sounds the best

bob505470 said in March 18th, 2010 at 8:23 pm    

true, but that would be a lot of hours of continuous usage at extremely high volumes.

AYONPA said in March 21st, 2010 at 9:24 pm    

i have the marshall vavestate VS65 can i change the tube12AX7 for another model for get a better & clear clean channel for use a multi effect, sorry for my english is not my firt language

massholejeff said in March 22nd, 2010 at 11:59 am    

Exactly Audiophile. Kills the life of the tube.

taygoo13 said in March 25th, 2010 at 8:50 pm    

JJ’s go for 17 each

AudiophileTubes said in March 26th, 2010 at 10:10 pm    

NO! DON’T TOUCH the tubes with your bare hands! Use a glove! Your body oils can cause the tube to overheat due to uneven and/or insulated heat!

zedrein18 said in March 27th, 2010 at 6:22 am    

12AX7 and EL34′s

GNFR422 said in March 27th, 2010 at 1:52 pm    

i mean what brand?

Xxsynysterg8sxX said in March 28th, 2010 at 1:17 am    

6l6′s for power amps and 12ax7′s for pre

Xxsynysterg8sxX said in March 29th, 2010 at 1:13 am    

no….some like 6L6′s go for like 40 60

GNFR422 said in March 31st, 2010 at 11:37 pm    

if im i listen to metal and rock what tubes do people suggest?

masterkiller1791 said in April 4th, 2010 at 6:37 am    

this guy seems dead inside. hahahaha

slimyesli said in April 7th, 2010 at 3:52 am    

yeah but learn first time take it and ask q’s next time d it alone

Chipstastegood said in April 8th, 2010 at 10:47 pm    

yeah i guess 12 dollars relative to 2000 does’n't seem like much but 12$ multiplied by x many pre amps is still a lot..

ItzAmazingBrian said in April 11th, 2010 at 4:08 am    

Unless it’s a Marshall, they have about 7 tubes but still, they are like $2000 for a head alone.

ItzAmazingBrian said in April 12th, 2010 at 1:51 pm    

It’s not that much being that there isn’t much more than 4 tubes on each amp or amp head. Those amps are going for $1000+ dollars.

Chipstastegood said in April 13th, 2010 at 1:44 pm    

12 bucks a tube? idk about that….

ItzAmazingBrian said in April 15th, 2010 at 7:57 pm    

How come tube amps are so expensive when tubes are cheap?

J3sst44 said in April 18th, 2010 at 6:00 pm    

It’s not hard, not worth paying for the technician, just unscrew the grille on the back, take out the old tube, and reinsert the new one. Not like taking a TV apart or something.

loombaron said in April 22nd, 2010 at 1:06 am    

i got one tube broke but no way i ll open the amp, i ll take it to the technician

1992AP7 said in April 25th, 2010 at 1:56 am    

lol kinda like safe sex, except “dont forget to use a cloth”

cefr said in April 25th, 2010 at 5:24 am    

hey man this amplifier dont uses a metal shield in the preamp stage tubes?

BritaniaRuleAgain said in April 26th, 2010 at 3:06 am    

What can I say? the dude was a creep.

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