I would not recommend a TV22 as a first attempt at a TV restoration, better to get a mid to late fifties set that is both cheaper to purchase and easier to work on.
I have restored a few TV22/24 variants over the years and have had both LOPT and blocking tx problems, both can be rewound of course, but will add considerably to the cost of restoration.
But don't let that put you off, they are a cracking little set once sorted.
Mark