I have a recently purchased used Yaquin MS-20L amplifier.

[f1jim]

Fired it up for the first time and it sounds pretty nice. I noticed when I put a meter on the bias points for each EL-34 they were all seriously low. That leads me to my question. Anyone know the proper tool size for adjusting the bias. It's clearly not a flat blade screwdriver but beyond that I can't tell. Standard hex? Torx? I know the amp originally came with the tool but it's long gone now. I figures it was time to ask the braintrust.
Thanks in advance
f1jim

 

[kouiky]

Hi,

Do you have a picture or two of the adjustment pont?

 

[chrisng]

T8 precision torx screwdriver.

 

[f1jim]

Excellent, thanks so much!!!