Dual rectumfire mods

[Tachy]

Hey guys, I want to bias my dual rectum becouse it's very cold.
I will run it with 6l6 in bold and silicon diode settings.
I tried to google but I can't find any info.
I modded my 5150II, the peavey are really easy to mod, but I don't know how to do it in my mesa.....any advice???
Thanks!!

 

[::XeS::]

Which is your tubes bias current actually?

 

[Metaltastic]

Here ya go dude!

http://forum.grailtone.com/viewtopic.php?f=24&t=35849

 

[Tachy]

Atm , I have 20mA in my svetlana wc 6l6

 

[Tachy]

Thanks a lot for the link metaltastic!!

 

[Tachy]

What is the correct current for 6l6 in the dual rectifier? 28mA??

 

[MetalJonesy]

i don't know if this is any use to you dude, theres a chart in it which shows values for different tubes, may be handy

http://dl.dropbox.com/u/369408/Bias Instructions.pdf

 

[Lasse Lammert]

the same as the 5150 ...or any other amp.
relace the bias resistor with a combination of pot and resistor.

EDIT:
saw a link has been posted....I'd strongly recommend to not follow that guide though!
you should always have a resistor in series with the pot (like 5-10k) to make sure that the value can't go to zero and fuck your amp up!!!

also the place he put that pot in is cool of course, but there's fuckk all space, you're likely to fuck up the PCB with your solder iron...just solder the pot/R across the Cap (parallel to the C).

 

[Tachy]

ok....thanks.........

 

[Tachy]

i don't know if this is any use to you dude, theres a chart in it which shows values for different tubes, may be handy

http://dl.dropbox.com/u/369408/Bias Instructions.pdf

Really helpful...thanks a lot guys for help!