treble bleed?

[talbany]

If I recall I have 434v on the plates. When I did the voltage chart it was pretty much in line with what others were getting.

It is biased at around 40ma.

Tom

I know everybody has there magic # at where they bias there tubes...
For me Iv'e found the 6L GC have a smoother transition into grind if they are biased @ 70% max plate dissapation... @ 40ma to me is a bit on the cold side.. Try running them up to around 48... Give that a try and see if you like it better...

http://www.webervst.com/tubes1/calcbias.htm


Tony VVT

[Structo]

Thanks I will.

I was going by what many here said about the D amps liking the bias a bit towards the cool side.

But you are right, I should experiment with the setting.

[Structo]

Wow, according to the top calculator on the Weber page, my 6L6's should be biased at 61ma for 70%!

[talbany]

Tom

That sounds like class A.. Your amp is Class AB.. Try that..


Tony VVT

[Structo]

I did.

I have class AB, 6L6GC, 343v = 61.2ma

If I move down to the next calculator I enter 343v and 61ma it comes up at 20 watts, but it also lowers the bias to 58ma.

If you look at the bias charts down below for a 6L6GC, at 350v it lists 60ma for 70%.

[talbany]

If I recall I have 434v on the plates. When I did the voltage chart it was pretty much in line with what others were getting.

It is biased at around 40ma.

I thought you said the voltage was 434...

The charts below are for Cathode bias amps...



Tony VVT

[Structo]

If I recall I have 434v on the plates. When I did the voltage chart it was pretty much in line with what others were getting.

It is biased at around 40ma.

I thought you said the voltage was 434...

The charts below are for Cathode bias amps...



Tony VVT

Ah geez, not enough sleep last night....

Yes 434v

Sorry