The ACME 805 is a version without amode cap which is also known as 805A.
 
Note from Manufacturer:
Based on the design of composite metal screen, the anode will be slightly reddish in operation. This is a normal phenomenon.
It takes at least 50 hours for the sound to gradually stabilize and it may take 150 hours or more to reach the state of perfection.
 
Maximum Rating
Ua---------------------------------1500 V
Pa-----------------------------125 W
Recommended Operating Conditions (reference value)
class B(A-F) for two tubes
                      typical working condition    limited parameter
Ua------------------               1250     1500      1250   V
Ia (mAx.sig per tube)-------------------            210     mA
Pa (in) (mAx.sig per tube)---------------          315     W
Pa (per t ----------------------------                     125    W
Ug----------------------------------          —16                       V
Ug(pk)----------------           235       280                  V
Ia (0)-----------------             148       84                 mA
Ia（mAx.sig）----------      500       600                  mA
Pd(mAx.sig)------------       6           7                     W
RL(a—a)---------------        6.7        8.2                   KΩ
Pout(mAx.sig)-----------     300       370                  W