Series secondaries?

[Phil Y]

Hello all,

I am messing around with a project and have found a problem with the transformer I'm using. The secondary is supposed to be 250-0-250 but one half is low and this can be seen as a lopsided waveform on the first reservoir cap. The high ripple is causing some hum. There is an unused 6-0-6 winding. Is there any reason I can't put this winding in series with the "low" half of the HT winding to even up the voltage?

Would that work or would it do something funny to the transformer?
Obviously the phase relationship would need to be correct for the voltages to add.
Advice gratefully received.

Phil.