ECC82 cathode voltage question

[Diabolical Artificer]

Aye,as Mr S Holmes said, "It is a capitol mistake to theorize before one has data"

 

[56085]

In my preamp, it has B+ option configuration for 100, 150, 200, 250, and 300, does it affect the sound base on the voltage? I like to get the best out of ECC82 but confuse about the B+ option.

Looking at the distortion numbers in the datasheets for the ECC82 I would choose the 300 V option.

 

[Alashikata]

Thank you. I looked at datasheets but not sure where the distortion is on the figure. Still a lot to learn.

Looking at the distortion numbers in the datasheets for the ECC82 I would choose the 300 V option.

 

[56085]

Triode online calculator:

Triode / Pentode Loadline Simulator v.1.0 (20161216 [url]www.trioda.com)[/url]

As far as I can see, this calculator doesn't take the input impedance of the next stage (if there is one) into account. For practical purposes that impedance is the value of the grid resistor of the next stage. For AC (so for signal) that impedance stands parallel to the load resistane of the stage (so if the load resistor is 100K and the grid resistor of the next stage is 330K, the AC load becomes about 77K (1/100K + 1/330K = 1/Rac).

 

[kodabmx]

Try this one: Universal loadline calculator for vacuum tubes - Vacuum Tube Amplifiers - DIY

 

[Alashikata]

wow, trying on my 300b pp, it's exactly what my bias is. Thanks

Try this one: Universal loadline calculator for vacuum tubes - Vacuum Tube Amplifiers - DIY