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

You do not have to spend money in the three figures to get a high performance Low Noise Amplifier (a.k.a receive preamplifier) for your 10 GHz system. Just look around in your neighbourhood trash!
Find VE2ZAZ / VA2IW Here:
Projects Website: ve2zaz.net
QRZ.com Info: www.qrz.com/db/VE2ZAZ
GitHub Repository: github.com/VE2ZAZ

[@TheGmr140]

Really cool project 😊😊

[@TheGmr140]

Very cool 😊😊

[@maksymtretiakov5154]

awesome

[@m0kov]

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

[@Smailov_Timur]

cool

[@ostrov11]

спасибо, хорошая работа.

[@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.