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It is extremely reliable and can handle several watts directly into either the input or the output without failure. Noise figure is typically around 1 db and gain is about 13 db. It is unconditionally stable. It is also very re-produceable.
Layout is not critical but it should follow the schematic in layout fashion. It is also wise to put it in an enclosure. Noise figure bottoms out in the U from 12 to 18 mA which is between 1.
EME is a different story. That will put you very close to optimal alignment. In cases where you want to put a great little preamplifier in your favorite radio merely build this critter on a very small board and use hard soldered coaxial cables for the interfaces.
For your info, I only use U preamplifiers on all bands from 50 thru MHz for terrestrial weak signal operating. When used in conjunction with good band pass filters you can bring any good radio up to its best sensitivity withour blasting it with 24 db gain from a GaAs FET preamplifier. Stick with the 12 db gain and you will be much happier with your systems performance.
These FET preamplifiers are very forgiving to accidental over-drive. They will handle at least 3 watts CW to the input and 25 watts directly into the output without damage amazing.
J309 MOSFET. Datasheet pdf. Equivalent
Préamplificateur à deux FET en série Gain 40