Cayin A88T bias for 6550EH tubes

[Marco1]

Bonjour a tous,
Je suis Marco et je suis Italien mais je ne parlez pas francaise tres bien.Donque je prefere parlez anglaise.
Pardonnez moi.
I have an used Cayin A88T integrated amp with stock Cayin KT88 tubes.Now I have four 6550EH Electroharmonix tubes that I'd like to install.
I'd like to know the correct bias setting in mV for these tubes.For KT88 I have to measure 400mV between cathod resistor near output transformer.But for 6550EH what is the correct bias?400mV or less?
Thanks a lot in advance,merci beacoup,grazie mille.
Ciao a tutti,
Marco

[Le caillou]

Salut,
the bias for the 6550EH is the same as for your previous KT88. (In addition, KT88 EH tube is nearly the same as 6550 EH).
Ciao

[Marco1]

Merci beacoup!!