Homemade PLC modem?

Question

Do it yourself

Hello everyone, I will assemble a modem for transmitting signals over a home power supply network.
Yes, I know that there are ready-made solutions, but the desire to do something of your own is more than buying a black box.
At the moment, a generator circuit (100kHz) connected through a high-frequency transformer for galvanic isolation has been assembled, the output voltage is 3-7 V, it seemed to be enough.
Here is the diagram:

Separately, all parts work as intended, but when launched into the network, the oscilloscope does not see anything on the load.
Possible reasons:
1. Insufficient generator voltage;
2. Not good enough transformer;
3. Some kind of system error that I don't notice.
Question 1: Maybe someone has done similar experiments, what advice to take into account and what to read?
Question 2: Such plc modems use ST 7540 , in the future it is planned to switch to it. But it uses a coil for filtering, included in the section of the network. This option does not suit me, are there any schemes with a parallel connection of such goodness?

Answer 1

Here Angstrem rivets such a thing www.angstrem.ru/products/Other-microcircuits/power-networks/KP1446XK1.html , it costs even less than ST-shki, it is switched on in parallel. The link has a datasheet. I myself have been looking at it for a long time, but everything is something once =(