Did they flicker because of 20 cycles? If so, why and where did 20 cycles current come from? lar ----- Original Message ----- From: <Til128 at aol.com> To: <greenkeys at mailman.qth.net> Sent: Wednesday, August 10, 2011 10:11 AM Subject: Re: [GreenKeys] TTY Ribbons > light bulbs were left hand threads to prevent theft. > > True! > > TT