Setting take-off power on the Viscount and the Budgie was much the same. Push the throttles forward a bit, wait for the props to catch up then smoothly push the throttles fully forward. If you did it properly and at the right speed, the props would spool all the way up with no "dip". Most people got the hang of it but some never did!
Also on the Budgie, when pausing to let the props catch up, it was quite common to lift the ground fine pitch lever out of its detent. This was not really necessary as advancing the throttles further would do it automatically, but it did help make the whole procedeure smoother.