I pronounce the 'u' in 'pronunciation' like in 'putting' but the 'ou' in 'pronounce' like in 'wound'.
Transcript
[The word "Tuesday", with each letter labeled by a box with an arrow:]
T: As in buffet
u: As in minute
e: As in record
s: As in use
d: As in moped
a: As in bass
y: As in gyro
[Caption below the panel:]
Pet peeve: Ambiguous pronunciation guides
I made an antiphonetic alphabet poster a few years ago to hang at my desk.
It has things like G as in Gnu. Y as in You.
In all fairness, the Y in "you" is totally pronounced.
As is the Y in U.