Found an older wideband amp design that would be useful to me , but need to update components and model in LTspice.
Reference and schematic attached

It has 3 custom made inductors wound with RG 178 coax for bifilar winding
Schematic does spec the toroid material and number of turns , but I don't understand the way they are represented.

I am using the circuit to sweep frequency into a magnetic coil containing small samples of material to find magnetic coupling parameters
Need some wattage added to my network analyzer, up to 100 w. Range I am scanning is 1 khz to 10 mhz
This is a coarse measurement on the initial pass , later tests will be done in narrower range identified by sweep with better controls/equipment.

If there are other basic designs to reference, that would be helpful also.
Can input arbitrary waveform to PA at low power , or input TTL low power to direct digital control of switches.
Not an issue if I need to add a transistor layer to drive the power switches in PWM.

My focus is on the material development, the electronics work is secondary ( not my cup of tea) , just needed to get affordable amp for the coarse screening process.

Thanks

 

The transformers on the input and output appear to be baluns (balanced-to-unbalanced transformers). In this case used much like transformers with a center tap on one winding. It takes a single ended signal and provides two signals of opposite polarity to drive the gates and then the output transformer performs the reverse action by taking signals 180° out of phase from each other from the drains and producing a single unbalanced output.