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High Performance HF Input stage with Tracking Preselector

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N1UL

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hf preselector

.Here is a schematic and a frequency plot of a high performance tracking filter based input stage suitable for the high performance software defined radios . The noise figure is less the 10 dB and the FET guarantees low IMD products.

73 de Ulrich
 

preselector hf

I’m sorry, maybe I missed the point. What is special at this circuit?
 
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    a8gw

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preselector

The high Q operation, (very narrow RF bandwidth, and low noise figure, Large signal data to follow
 

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