This PA was pretty grimy and it had been in a humid place as there was rust and dirt on it.
The main problem was the tweeter. It was open.
Here are a couple of pictures that show the problem..
The crossover was a little ill!
After measuring the tweeter was open circuit, it was removed.
and as it was screwed together, of course I opened it
.
.....
The tweeter screws into this bracket that was screwed to the horn.
A Jaycar CT1930 Piezo tweeter was purchased to replace the old one as it did not need a crossover network.
but that would not just drop in. So, 3D printer to the rescue. First, the new tweeter was disassembled, just 2 screws.
the back has a special cone shape to fit into the driver element
so I drew an adapter...
3D printed it.
then mounted it all..
and it works
I could not have done this without the 3D printer.
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