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15-37-01, 144-174 MHz, Vari-Notch Cavity Filter
The Vari-Notch® design passes a relatively narrow band of frequencies and rejects (notches out) a relatively wide frequency band. Equivalent to a combination series-tuned and parallel-tuned circuit, this filter has a greater notch depth than the Series-Notch® design. The notch depth is adjustable but varies with passband insertion loss (0.3dB or 0.6dB typical) and the difference between pass and notch frequencies. Vari-Notch® is ideal for moderately close to wide separations (200 KHz and greater) in VHF applications and (400 KHz and greater) in UHF applications.





Product Specifications 
Item No15-37-01
Item Name144-174 MHz, Vari-Notch Cavity Filter
Frequency Range144-174 MHz
Minimum Separation - Pass to Notch170 kHz
Frequency Separation170 kHz
250 kHz
500 kHz|1 MHz
Attenuation vs Pass to Notch22 dB @ 170 kHz
27 dB @ 250 kHz
37 dB @ 500 kHz
45 dB @ 1 MHz
Power Rating150 W
Impedance Ω50
VSWR1.25:1 max.
Cavity Length - Electrical1/4λ Low Pass
Temperature Range-30 to +60 °C
Cavity Diameter6.625"
Number of Cavities1
Cavity Height26" w/ tuning rod extended, 38" max.
Shipping Weight17 lbs.