I need suggestions for an ATA that *ACTUALLY* provides high-power ringing

[dsk]

The simplicity of the ball ringer makes the solution genius because it is so simple. The permanent magnet makes the ball rest, and A or B gets the oposit magnetic pole, the ball moves in that direction. Not much possibilities to adjust the sencitivity, so I would guess that  a considerable increase of the capacitor will be the best solution.

[HarrySmith]

OK. Thanks for that explanation DSK.

[Dr Neon]

The simplicity of the ball ringer makes the solution genius because it is so simple. The permanent magnet makes the ball rest, and A or B gets the oposit magnetic pole, the ball moves in that direction. Not much possibilities to adjust the sencitivity, so I would guess that  a considerable increase of the capacitor will be the best solution.

Where about in the circuit diagram would the capacitor go, and which values would you suggest to start out with? I haven't delved in to telephone circuit theory before, so I'm not quite sure where it is or would go.

[dsk]

This is not any science, so you have to test out what is best in your case.
A typical capacitor for such use is non polarized, and rated for 200V or more.

Depending on what you have available, but I would have started with a capacitor of 1 micro-Farad (uF) between L2 (red) and K(blue) and increased up to around 3  (3.3) before I gave up. 
The larger value, the higher load, but the coil is limiting the max pretty well. 

[dsk]

This is not any science, so you have to test out what is best in your case.
A typical capacitor for such use is non polarized, and rated for 200V or more.

Depending on what you have available, but I would have started with a capacitor of 1 micro-Farad (uF)
between A (red) and K(blue) and increased up to around 3  (3.3) before I gave up.
The larger value, the higher load, but the coil is limiting the max pretty well.

This drawing is made with corrections to the earlier posted diagram. (Erased by the admin)