setting Steinhart bias?

[valvesonly]

I have a Steinhart 102DD valve amplifier and have managed to obtain replacement (NOS) Russian power tubes . I cannot work out how to set the bias on this board and do not have a schematic for the amp. Any sources or data would be helpful.

 

[ghostinthemachine]

 

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[Ampdog]

 

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[handsome]

 

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[valvesonly]