----- Original Message ----- From: "Tyler Harpster" [email protected] To: [email protected] Sent: Friday, April 04, 2008 4:39 AM Subject: [amsat-bb] relative noise figure meter
Since I didn't pick the correct numbers for last week's big Mega Millions drawing, I am again looking for cheap equipment.
I remember seeing a home brew "relative" noise figure meter somewhere. It would not give you an absolute noise figure number, but it would move a needle one way or another to show how your tweaks are affecting the noise figure of the device under test.
Does anyone know what this is or where I can find a link to it?
Thanks, Tyler KM3G
Hi Tyler, KM3G
Here is the description of a serious and simple Noise Figure Meter that you can build with easy
http://gref.cfn.ist.utl.pt/cupido/noisefm.pdf
And here is the schematic diagram
http://gref.cfn.ist.utl.pt/cupido/nf_sch.gif
I use this Automatic Noise Figure setup with success.
73" de
i8CVS Domenico