[Xyience]

I have just restored and converted a French U43 Ericsson dated 1964.

I was amazed at just how little I needed to do to get this working on our phone line - a BT line cord, two diodes and a quick clean up of some oxidised contacts.

The sound from the earpiece is a bit quiet and the sound from the Mother-In-Law speaker is about 50% too quiet (any ideas? I might remove the added rectifier to see if this helps - I chose random diodes!)
Apart from this the phone looks and performs really well.

But to the main question - I have a vintage electric bell (see attached) that I would like to use as a bellset for the phone. I know it will not give a traditional twin-bell tone, but this car boot find deserves a purpose in life.

I cannot find much in English on the U43, and nothing about bellsets for the model.
Can anyone suggest a circuit that can connect the two?

[The bell dings nicely with a tired 12V battery, but too aggressively with a 12V 2.5A smoothflow model train supply]

HAPPY NEW YEAR TO US ALL