Sunday, 3 October 2010

That thin slot

I had a question about that strange piece of wave-guide in the previous post.
I am told by the owner that the item is the original 13cm parametric amplifier used for the first amateur radio EME contact. The pump oscillator is not shown.
The reason for the very narrow slit is that it provides the required low impedance match to the parametric mixer diode in the waveguide.
73 de Sam

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