JoelSim:You can take it to a dealer or get it upgraded by Arcam, but it will cost you more than buying a new CD192 and selling your 73 on eBay. Don't do it.
Yeah, I totally agree. When I contacted my dealer and enquired about upgrading they said Arcam could, if required, upgrade to the CD82 at the same cost.
Also, if you haven't had the 73T that long, say less than 2 years, you could part exchange it & get a good price back, with a bit of haggling.