What's your bias set at?

[gnugear]

When I first fired up my amp I set the bias knob at noon and it ended up being around 25mA. It was okay, so I tried bumping it up to 40mA and it started to sound really stiff. I'm at 36mA currently and think it sounds pretty good.

Where are you guys running your amps?

[Allynmey]

30mA here. I'll experiment this week.

Allynmey

[UR12]

I set mine using the crossover distortion / scope method and am setting at 32 ma

[gnugear]

I set mine using the crossover distortion / scope method and am setting at 32 ma

Wow, that sounds pretty precise! I'll set mine at 32mA as too!

[Legin]

I used the OT shunt method and set at 33.8mA
Nigel

[Jeph]

35ma, I haven't been able to play with the setting yet.

[Custom 100]

I set my bias pot so I'm reading -30VDC on pin 5. Did the shunt method at this setting and was reading 37 and 38 ma on a matched pair of new Winged C EL-34s.
Plate voltage was 396VDC. Sounds very nice (and LOUD)this way.
Hope that helps.

[UR12]

Hey custom

How do you like those Winged C El34s?

[rhinson]

hello there, yep i pretty much bias the couple of 2-el34 amps i have (that run at these plate voltages) in the 38-40ma range. a lot of the plexi guys like to use the 70% dissipation point but i like to run them a bit leaner than that, though usually over 50%. i wonder if the guys (allyn and greg i believe) that spent the time with francesca had time to do a plate current check----i do believe they said that the plate voltage was right on target with moose's power trannie. if not, maybe when they get it back they can do a plate current check to add to the list details. rh

[Richie]

I'm sure its just going to vary from one set to the other,depending on brand or hot or cold rated the tube is. But i think the posts show it can be from 30 to 40ma somewhere in that ballpark.

Richie

[leadfootdriver]

Bumping this for perspective..
I always just set to 70%.
However, reading into it, it seems there's an audible difference between 50-70%..
I'll need to try again.