Make the most of that Long Wave, I believe the BBC are going to phase it out soon anyway.
It's powered by two, 3ft high by vacuum tubes that cost the earth to make, if you can find somebody who still knows how to. They were 'hand made' the artisans long since dead, thus the technology is 'lost.'
The BBC scoured the world for them and managed to get the last 7 or 8 in existence. They have no designated shelf life / best before date, they go until they don't. It could be 5 weeks or 5yrs.
You get a couple of Friday afternoon, I'm knocking off soon, rushed ones and 25% of you stock could go 'pop' in 6mths.