QPR winger Ephraim - who had a spell on loan at The Valley last season - Colchester wideman Wordsworth and Notts County midfielder Judge are all rumoured to be targets for Powell.
But he said: "We are always going to be linked with Hogan. Wordsworth we seem to be linked with all the time. He's a player we came across last season, but I haven't seen him this year.
"Judge is a story drummed up that came up over the weekend, but I haven't spoken to anyone at Notts County about bringing him here.
"So it's fact or fiction time and it's going to be like that for the next week. I suppose it will only be fact once I welcome a new signing through the door."