Dowser
Learning to bodge again..
It's yours if you want it. I nearly binned it, but like so much clutter, it now resides in the loft.
Jez provided a likely explanation of what happened, but it took out a tweeter on a 15 inch Tannoy when it did go phhhutt. Not a proper description, but his best, educated, guess was that it basically caused the Croft to produce quite a slug of DC. The tweeter coil looked OK until I used a lens, when the few fried turns were obvious.
Bummer! How long after you got it? I feel guilty now...I PM you.