70 cm 430 – 440 MHz 2.5 kW -0.06 dB Transmitting Band Pass Filter

With its extreme low insertion loss this filter could be used as transmitting and receiving filter in line with antenna.

– As transmitting to suppress any harmonics from 70 cm up to 2.5 kW linear amplifiers.
– On receive side before LNA to protect receive performance from any HF, FM 2 m, 220 MHz or 23 cm strong stations.

Filter is completely the same as 1 kW version except connectors (7/16 DIN – “N”).

Achieved results on a built Band pass filter:

Frequency [MHz]	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:	[W]
1 : 1	2500 W
1 : 1.1.5	1600 W
1 : 2	1350 W
1 : 3	1150 W