Let me ask no matter if the potency of the furnaces is different? Because the power of the Frigidaire is that of input is 1050 W and the output power of 700W, while that of the .DAEWOO the input power is 2450 and the output of 600W
In this case you would not have problem because of what you indicate, now the size of the magnetron should be similar.
The only incompatibility can occur is in the case that one magnetron is from an inverter oven and the other is not.
It doesn't seem to me that either of us is investing anyway, I'm going to look good thanks