Yes, Alex is correct.  The Douglas planes were still cable and push-rod.  Can't remember about the Convair 880/990 I think they were servo tabs with spoiler assist for roll and I'm guessing the DC-8 was the same. 

But I only flew Boeing planes. 

Yes, the 717 is made by Boeing, but it's really a DC-9.  I guess you could even say the 727 was a bit of a hybrid in that with loss of hydraulic power the plane would go to manual reversion (servo tabs).  Flying the 727 in manual reversion was not fun.  You only had roll and pitch and it was very slow.

The idea of the balance panel was a pretty good design for the time.  The 707 was very nice to fly but you needed a bit of arm strength to make it happen.  Even with the boosted rudder in the 707 during engine out training you could see the pilots leg start to shake if they didn't crank in the rudder trim.

Lou