Ok JohnE! If you have a response, send me a sign.

Thanks!
 

P.S. : Have your already finalize a 5F6-A?

I've seen a difference between the ceriatone layout and the others concerning the rectifier stage. On ceriatone layout, there is no cap before the standby switch. On the others (original layout, etc.) a cap (0,05uf) is use. Is it for extend the life of GZ34? I've a ceriatone clone. What must i do?

Thanks.
 

On the page of American Classics 5F6-A Bassman Parts of Ceriatone we can see the description of tubes including the power tubes : 5881*2. And, on the other hand, on the layout, we can see that the power tubes are 6L6GC. Where is the truth? This tubes are different, no?

On thetubestore.com, we can read for 5F6-A Bassman : " Power tubes are a pair of 6L6 (5881s were originally specified). Recommend using matched pair of 6L6GCs or NOS 6L6Gs, GAs, GBs, or WGB, or 5881s. Current TAD 6L6WGC-STR and re-issue Tung-Sol 5881 are the best option in place of NOS tubes.... DO NOT use other types."

Which tubes can i really put?
Thanks.