10 GHz System, Part 13: A Low Noise Amplifier from my Junk-Box!

[@TheGmr140]

Really cool project 😊😊

[@m0kov]

A really, really big thanks for taking the time and trouble to upload this series of excellent videos. 73 de Steve M0KOV

[@ostrov11]

спасибо, хорошая работа.

[@maksymtretiakov5154]

awesome

[@TheGmr140]

Very cool 😊😊

[@Smailov_Timur]

cool

[@amirb715]

awesome! what coupling cap did you use at the input exactly? also why no coupling cap on the output? it is DC coupled and can influence the bias of the second stage. and how did you measure the input VSWR? thanks

[@VE2ZAZ]

5 pf or so. Not critical since it does not take much capacitance to offer a low impedance path at 10GHz. The transverter has an input coupling cap, so no need for an output cap on the LNA. Howver, I did later add a coupling cap on the output as well, so I could add an external attenuator for testing purpose. I tested the VSWR with a generator and directional coupler, same technique as with the WR-90 to SMA transition.