transistor intercom help can i do this

[doronsky]

Can anybody help me
Hi I have a homer 4 station transistor intercom
The main unit has a 9 volt battery the others do not
You press one of the other units it calls the main unit .
Then the main unit switches between the 3 other units on a control knob to select ( unit a , b , or c. ) depending which one called
I dont want this
So do anybody know if I can make this set work like this
Press any of the 4 units and sound comes out of the other 3 ( talk press down ) ( up nothing off )
Any idea????????

 

[scanman]

Hi doronsky,

Can you get a schematic?
It sounds like the master switch may have to be configured differently
or abandoned.

Regards,
scanman

 

[doronsky]

this is all i have or can find about it
instructions in pdf file
don't know if any of this helps

 

[scanman]

Hi,

It is a simple 3 transistor amplifier with directional switching for the remotes.
I suggest (you're going to hate me) you do like we did when we were kids....
Reverse engineer it. Make a drawing or find someone who is electronically capable to do it. Shouldn't take more than an hour or two. Then maybe you can re-wire it
to suit your needs.

Regards,

scanman