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
NFdb = 10 * LOG10 (20 * I * R)
where: I = Plate current in Amps, R = generator resistnace, 50 Ohms in this case.
Type-N male output.
Manual or schematic mailto:email@example.com?subject=ARI Noise Genertor Manual Info
This is a very similar noise source where the filament current is
the adjustment that controls the noise output.
According to MIL-HDBK-172A Vol 1: The SG-8 superceeds the TS-195/GP.
Frequency range: 10 to 150 Mc
NF Range: 0 to 30 (50 Ohms)
USAF Spec 7524
This noise generator uses a tube acting as a diode to generate
noise then useses filters and amplifiers to control the noise
bandwidth and level, so is NOT at all similar.
GR 1390 Random Noise Generator Manual -
Sylvania Technical Manual 1949 http://220.127.116.11/tubes/oldsyl/data/1949/1949.htm
- 5722_gif1 - 5722-gif2 - 5722_gif3 http://18.104.22.168/tubes/oldsyl/data/1949/5722_1.gif
page created 13 June 2002.