I just took the back off of my HT-4B, which is similar to the BC-610, to take a look at the modulation transformer.It looks like a "pick up with one hand" object to me.
The open frame ones with cast iron end-bells are heavier, but I still think it could be carried by one person using one arm. The BC 610E used those. The more modern hermetically sealed ones are "pick u with one hand" objects. Hopefully, they made them smaller and lighter by using more modern materials.
Don K4KYV
