How to take apart this phone.

[jcdammeyer]

I have this old dial phone mounted to the wall. I can remove the two screws and then the top of the case can be pulled a bit away from the back part. But something is holding the bottom. No other screws. Can't move up/down/sideways because the upper part is still hooked around the dial mechanism.

At some point I'm sure I had it apart since I'm pretty sure it didn't come with the house but for the life of me I can't figure out what to do next and I really don't want to break it.

Ideas?

 

[JustaDB]

About 2oz of C4...

 

[whydontu]

You have to remove the handset plunger

 

[jcdammeyer]

You have to remove the handset plunger

Thank you thank you thank you!

 

[jcdammeyer]

Evidence that I succeeded.

 

[slow-poke]

I like it, it will still be working when when we're all pushing up Daisies;-)

 

[jcdammeyer]

I like it, it will still be working when when we're all pushing up Daisies;-)

A friend of mine no longer has a land line but his electric gate controller that used to interface to the internal house phones won't work without a dial tone. If it sees an on hook condition it then goes off hook, waits for the dial tone and then disconnects the land line and interfaces to the house phones. For both intercom and remote gate control.

I'm building him the 48V on hook supply and creating a dial tone with an ESP8266 output stepped up with a 1:10 transformer. Once it sees that it should disconnect and ring the house to allow telephone/intercom connection to the gate. The 48V supply is a step up module from AliExpress for $4.87 inc. shipping. The transformer from Mouser is $4.00. So a few resistors and some wiring plus a 12V supply and a regulator for the ESP8266 should fool the gate controller.

We'll see. Cheap experiment. I'm using the old dial phone to simulate the gate controller.

 

[slow-poke]

Sounds like a fun project.

I did some phone electronics a few years ago. I forget the speech synthesis chip I used but it's really easy to use just upload audio files and then trigger the desired file by name when you want to play It.

 

[ChazzC]

A friend of mine no longer has a land line but is electric gate controller that used to interface to the internal house phones won't work without a dial tone. If if sees an on hook condition it then goes off hook, waits for the dial tone and then disconnects the land line and interfaces to the house phones. For both intercom and remote gate control.

I'm building him the 48V on hook supply and supplying a dial tone with an ESP8266 output stepped up with a 1:10 transformer. Once it sees that it should disconnect and ring the house to allow telephone/intercom connection to the gate. The 48V supply is a step up module from AliExpress for $4.87 inc. shipping. The transformer from Mouser is $4.00. So a few resistors and some wiring plus a 12V supply and a regulator for the ESP8266 should fool the gate controller.

We'll see. Cheap experiment. I'm using the old dial phone to simulate the gate controller.

Lots of fun things can be done with the "innards:" do a search for "Alfred P Morgan Boys Books PDF." You may be able to rescue a pre-teen (male or female) from the insidious gaming screen!

 

[jcdammeyer]

Found my 48V supply.

With a 2.25K resistor in series the -48V ON HOOK voltage drops to about 3V OFF HOOK. And dialing the number zero looks like this.

Now to order a small 1:10 transformer to step up the 3V dial tone to 30V or so.

 

[trevj]

Probably, iFixit, won't have a breakdown...

Looks like a fun project, John!