[Test-Equipment] Need info on Noise figure meter

[k4pf at juno.com]

Hi, 

The ARRL 1965 Handbook, page 526, featured a home constructed 
noise generator head with a 5722 tube.  
Perhaps that's what the home-brewer based his design on.  

Someone said gas tube noise generators are problematic when testing
modern devices, but the 5722 is not gas-filled.  It is a vacuum tube diode with a cathode probably of uncoated tungsten, 
shades of 1920's technology.

73,
Ed Knobloch


-- Edward J White <wa3bzt at verizon.net> wrote:
Hi Gang:
I am looking for information on a General Microwave Model 506A-2 
Automatic noise Figure meter. This unit has been modified with a 
connector and a noise head for a noise tube 5722 Sylvania.
The noise head looks to be home made.