VTA St70 with 6l6gc

Hallo together,
I have an VTA St70 and like it very much.
It is with SS rectifier, 6GU7 as input tube and 6CG7 as splitter tubes.
The power tubes are EL34.

Now I want to try the 6L6GC tubes. I have read, this is not a problem, it will work.
But if I would like to get the best conditions for the 6L6GC, what would I have to change?
Bias setting is enough?


Enjoy your weekend
Tomerte

keep the bias at 40ma or better 35ma, and make sure not to use GB or GA tubes only rated at 360v
6L6GC are rated at 450v.

Yes, I have read all the post here in the forum concerning the rolling of el34, 6l6cg and 6p3s-e.
With the correct bias it will work. But the conditions for the 6p3s-e would not be ideal.
What must I do, if I would like to get ideal conditions for the 6p3s-e?

Thanks
Tomerte

If you set the bias to 35-40 mA the 6p3s-e works perfectly.
I've been using a set in my ST70 for the last couple of years, and they now have run for more than 2.000 hours without any problems, and the bias is still steady.

Hallo erlingt

Thank you for answering.
I will do so, 35-40 mA. Some people are telling you can do till 50mA.

If I make 40mA, than I have the same conditions as for EL34.
But it is another tube the 6p3s-e!!!!
For the best conditions for this tube, I think, it must be done some more.
F.e. some resistors with less or more value? The value of the outputtransformer?
Or to change the voltage of the plate?

I am sure it will run without big changes. But perhaps it would sound still better
and the tubes will live longer with the correct conditions for this tube.

Nowhere in the net I found an answer, and i am not able to calculate this.


Greetings to Denmark
I am from Berlin, Germany

Tomerte