Model NS-LB Noise Generator
© Brooke Clarke,
N6GCE
Description
This Noise Model NS-LB generator was made by Aerospace
Research, Inc. of Boston, MA. It uses a 5722 Noise diode tube
with a Tungsten filament using the "shot effect". There is a
solid state control circuit that varies both the DC filament current
and the plate voltage in order to produce a variable excess noise.
The filament voltage needs to be varied from 2.0 to 5.5 Volts while the
plate voltage varies from 10 to 200 Volts. The tube is speced up
to about 500 MHz, but the construction of this noise generator may go
higher.
NF (Noise Factor) = 20 * I * R
or
NFdb = 10 * LOG10 (20 * I * R)
where: I = Plate current in Amps, R = generator resistnace, 50 Ohms in
this case.
Type-N male output.
Wanted
Manual or schematic mailto:brooke@pacific.net?subject=ARI
Noise Genertor Manual Info
Links
Sylvania
Technical Manual 1949 - 5722_gif1
- 5722-gif2
- 5722_gif3
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