A15MK2 problem no sound 8 and 4 ohms

Hello to all

I have just finished my à15 mks2.
I tested all the tensions, they are comparable with the plan.
The amplifier ignites, lamps shine as they owe.

But my problem is when I connect my baffle between 4 ohms I have no sound, in similar 8 ohms but in 16 ohms I have of the sound rather low(weak) volume completely.

I verified the OT, under stress without the lamps of power I have

pin 12/13 = 0,512 kohms
pin 12/6 and 7 = 257 ohms
pin 13/6 and 7 = 256 ohms

I also have to re-verify quite the resistances of V1, V2, V3, V4, all the cabling but nothing abnormal.

I know more or to look I need help please

I add the taken measures

TR1
pin 16/18 (6.3v Ac) 7v
C29 (298v) 306.4v
C28 (290v) 298v
C26 (262v) 267.5v

R44 (2.8v) 2.73v
R43 (16v) 15.56v
R42 (17) 16.82v

V1
pin 1 (154v) 149.04v
pin 3 (1.2v) 1.29v
pin 6 (145v) 141.04v
pin 8 (1.2v) 1.19v

V2
pin 1 (228v) 233.7v
pin 3 (3v) 3.24v
pin 6 (156v) 157.6v
pin 8 (1.2v) 1.26v

V3
R10 (237v) 248.5v
pin 2 (116v) 118v
pin 3 (123v) 125.3v
pin 6 (110v) 106v
pin 8 (1v) 0.96v

V4
pin 1 (171v) 170v
pin 3 (17v) 16.75v
pin 6 (181v) 191v
pin 8 (17v) 16.83v

V5
pin 4 (288v) 297v
pin 3 289v

V6
pin 4 (288v) 296v
pin 3 288v

Cordially will

Please help me

Hello everybody
I solved the problem, I defused(unsettled) the OT and any recâblé,
I then redid the armored cable F and B and the sound was.

I expected not that that rings so hardly for 15 watts, and that sounds very well especially squeaky clean.

Thanks to the forum, that allowed me to understand(include) best the functioning of the ampli