Panasonic Microwave inverter

I have a heating application that works well with microwaves, a full wave transformer/capacitor set up works fine but I want to increase the power by using two magnetron's. I notice the current draw using an inverter circuit board is considerably less for the same power. I have tried all sorts of ways to switch on a separated inverter board, through the control signal input/output connections, with no success, can you help? Tony

Hi Tony, Can you upload a schematic drawing so we can understand your circuit and clarify the question?

Hi Cody
Many thanks for the reply, hope the diagram helps

Its a picture in "Word"

Here is an image of it.

There is one way is to increase cooking power, say if you are using 1000-watt power then you can increase it at larger level, say 2000-watt cooking power! But for this, there may be adjustment in the board I think.

I do not want to increase the power, the output from a standard 1kw magnetron is ok.
To get the most power output from a 1kw magnetron it is best (and smaller & lighter) to use a Panasonic microwave inverter.
The problem is switching on the inverter without using the domestic oven controls. I have tried all sorts of hacking solutions without success.
The front end control for the inverter board is some sort of optical coupler
I am led to believe the input circuit is simple but I have yet to make it work
If you have a circuit diagram that would help a great deal