Ericsson Dialog wall mount version

[Vesa]

Just found Ericsson Diavox series wall mount phone from fleamarket. Price was reasonable, 2.5eur. Phone was originally guite dirty but after disassebly and wash it looks quite good.

This model is pulse dialing version. Logo on the left side of buttons is Posti Tele, old version of Finland post office. Phone come with out cord, it was cut away. Propably Posti Tele official procedure when they moved from pulse dialing to touch tone phones. With out cord nobody would try to connect phone to landline and wonder why it dos not work.

Ericsson "plague" with Diavox phones is Rifa-Evox capasitors. This phone has two of those: 0.1uF/400v and 0.3uF/400v. Both were already cracked. After caps replace and new cord the phone works all-ok. Wall mount braket is missing, new one desing is done and will be printed soon. If someone has picture of this phone model bracket, let me know. I would duplicate 3D desing for printing.

[Vesa]

Here is picture typical Rifa caps from Ericsson Dialog, Diavox and ITT phones. From left to right: 0.1uF, 0.3uF and 1uF. Voltage rating varies, 250V or 400V. Needs to be replace immediately. Use 400v polyester versions, available from Newar/Farnell/Digikey. Later models from Dialog series and pulse dialing version of button phones use these.

[Vesa]

One more item, this phone has circuit diagram on inside of cover. Digram is small, around 3x3cm. Managed to get reasonable picture of it:

[Kellogg Kitt]

Interesting!  I have never seen one of those before.

[Vesa]

3D printmodel for the wall mount bracket. Just rename .txt to .stl. Phone series is actually Diavox, not older Dialog.