70 cm 430 – 440 MHz 2.5 kW -0.06 dB Transmitting Band Pass Filter
With its extremely low insertion loss, this filter could be used as a transmitting and receiving filter in line with the antenna.
– As transmitting to suppress any harmonics from 70 cm up to 2.5 kW linear amplifiers.
– On the receive side before LNA to protect receive performance from any HF, FM 2 m, 220 MHz, or 23 cm strong stations.
The filter is completely the same as the 1 kW version except for connectors (7/16 DIN – “N”).
Achieved results on a built Band pass filter:
Frequency [MHz] and Insertion Loss [dB]
1.8 MHz: -110 dB
3.8 MHz: -110 dB
7.1 MHz: -108 dB
14.15 MHz: -100 dB
21.4 MHz: -92 dB
28.4 MHz: -84 dB
50.1 MHz: -69 dB
70.2 MHz: -60 dB
88 MHz: -54 dB
144 MHz: -39 dB
146 MHz: -39 dB
148 MHz: -38 dB
220 MHz: -24 dB
225 MHz: -23 dB
430 MHz: -0.06 dB, Input RL batter than -34 dB
432.1 MHz: -0.06 dB, Input RL batter than -34 dB
440 MHz: -0.06 dB, Input RL batter than -34 dB
860 MHz: -26 dB
864.2 MHz: -26 dB
880 MHz: -27 dB
1240 Mhz: -64 dB
1296.1 MHz: -48 dB
Maximum Power Input at SWR:
1: 1: 2500 W
1: 1.1.5: 1600 W
1: 2: 1350 W
1 : 3: 1150 W
Measured data on the assembled filter with HP8753ES network analyzer full 2-port calibrated:
Extreme Power 70 cm Band-pass Filter 2500 W S11 and S21
70 cm Band pass Filter 2500 W HF Suppression:
432MHz Band pass Filter 2.5 kW: HF, 6m, FM Suppression:
432 MHz Band Pass Filter 2.5 kW: 2m and 1.25m Suppression:
430 – 440 MHz Band-pass Filter 2.5 kW Measured Data zoomed characteristics.
Insertion Loss is set to 0.2 dB! Excellent Band Flatness and supper low loss of BPF!
70 cm Band-pass Filter 2500 W Harmonics Suppression:
430MHz-440MHz Extra Power Band Pass Filter 2500W Fan Cooled Appearance:
All band-pass filters are here: HF, VHF, and UHF Band-Pass Filters
Direct link to all 70 cm filters. 50 W, 100 W, 200 W, 300 W, 1000 W and 2500 W versions: 70 cm Band-Pass Filters
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