Neat to hear all of the different traditions surrounding the censer. I also didn't know that the Greek priests will use only a hand censer for Orthos in Holy Week! For us, of course, it's not a special thing. Priests never use it in our tradition, always the chain censer. Deacons never use it, either, unless he is censing at a reader's service. I've censed our church before at reader's services with such a hand censer.
My parish has three chain censers, one with bells and two without. The bells are used on Sundays and feast days, and of course throughout Paschatide. During the week, we do not have bells. We never use bells during one of the fasting periods (Lent, Advent, Dormition, Apostles).
At the Liturgy, the servers actually move the charcoal from the belled censer into a censer without for the Epistle reading, so the people can hear. Our priest (no deacon is currently attached to our parish) breaks up the censing. He will cense the Holy Table and altar while the prokeimenon is proclaimed, then dialogue with the reader from the high place. Once the Epistle is being read, he will cense the iconstas and the servers. He will then go back to the high place and hand the censer off, and a server will move the charcoal back into a belled censer and return it to the priest. The priest then finishes the censing during the Alleluia, bells going! I personally like this because the bells bring a very festive feeling to the Alleluia, which we sing quite excitedly, and is remarkably different from the silence during the Epistle reading. It really makes you excited for the Gospel reading!
I also have to second what was said above about the lack of bells really making a point during Great Lent. They're definitely missed when they aren't there, and remind me what season we're in!