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| | Electrical specifications
| Model |
PF8-1V |
PF8-2V |
PF8-3V
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| Operating frequency band, MHz |
140-174
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| Insertion loss (adjustable), dB |
0,5-3 |
0,1-5 |
0,1-7
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| Impedance, Ohm |
50
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| Attenuation |
see fig.
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| VSWR, not more than |
1,2
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| Input power, not more, W |
not more than 300
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| Temperature range °C |
from -30 to +60
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| Cavity electrical length |
1/4λ
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Mechanical specifications
| Model |
PF8-1V |
PF8-2V |
PF8-3V
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| Diameter, mm (ins.) |
206 (8")
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| Weight, kg |
3,25 |
7,2 |
10,5
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| Connector |
N-female
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| Mount to 19-inch rack |
optional |
yes
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| Length/Width/Depth, mm |
800x206x206 |
800x480x210 |
800x480x420
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Using PF8-V series filters in antenna section of radio stations and repeaters you will raise selectivity of their receivers, lower influence of out-of-band interference, escape effect of UHF blanking by nearby radio transmitters and desensitization, and eliminate intemodulation interference, also. Recommended to use if equipment is installed in locations with high density of transmitting devices. Enlarged cavity diameter provides higher Q-factor comparing to five-inch filters
PF8-2V and PF8-3V filter represents two and three PF5-1V filters connected in series and combined by metal brackets. They have higher characteristics at corresponding loss.
Typical selectivity characteristics
PF8-1V
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PF8-2V
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PF8-3V
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