It won't take 115V directly, you need to kick it up
Like a Microwave Oven, there's a transformer and rectifier inside the radar set or comm microwave gear to kick the 120V AC utility power up to several KV and make it into DC.
Then they modulate it with the data stream before routing the power to the Magnetron tube for transmission.
Still say it would make a beautiful Steampunk-ish shadowbox conversation piece if properly boxed and presented - but it's worth a hell of a lot more to someone with that model of radar set and a dead (or slowly dying) Magnetron who needs a replacement. Box up their dead one.