2m 144-148MHz <0.1dB High Power Bandpass Filter 1.5kW

2m 144-148MHz <0.1dB High Power Bandpass Filter 1.5kW
Product Code: 0642
Price: 199.00€
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144MHz - 148MHz 1500W <0.1 dB Low Loss Transmitting Band Pass Filter with "N" connectors

Filter is completely the same as 4kW version except connectors (7/16DIN - "N").


2m Bandpass Filter BPF uses high Q coils and capacitors with Q more than 4500. Low loss of filter achieved with careful design and adjustment.

Intended for use with linear amplifiers 8877, GS35, GS31, OM Power model OM1002+ and with other tubes or transistors up to 1.5kW output.

Although intention of this filter is to be used as transmitting filter, design allows also to be used as receiving filter before wideband LNA to protect sensitive device from strong out of band signals. Like this.

Super low insertion loss. Excellent to put before any LNA or protect receiver from HF transmitters in DX expeditions or in multi-multi environment. This BPF will suppress any signals from HF 1.8 - 28MHz stations 50-54MHz, 70cm 432MHz (430 - 440MHz).

Filter will reduce TVI problem or your problem with neighbours with strong HF, 6m or 70cm transmitters.

Here are presented measured results with HP8753ES network analyzer full two port calibrated.

Return Loss (S11)

Insertion Loss (S21)


Achieved results on a built Bandpass filter:

1.8MHz=-100 dB
3.8MHz=-91 dB
7.1 MHz = -81 dB
14 MHz = - 67dB
21MHz= -58dB
28 MHz = -51 dB
50 MHz = -34 dB
54 MHz = -31 dB
144 MHz = -0.09 dB
145 MHz = -0.086 dB
146 MHz = -0.09 dB
148 MHz = -0.089 dB
Harmonics and interfering signals:
288 MHz = -40 dB
296 MHz = -37 dB
430 MHz = -41 dB
432 MHz = -42 dB
440 MHz = -44 dB
576 MHz = -36 dB
720 MHz = -34 dB
880 MHz = -33 dB (GSM - Mobile phone)
930 MHz = -31 dB (GSM - Mobile phone)
960 MHz = -29 dB (GSM - Mobile phone)
1296 MHz = -17 dB
These excellent results were achieved by careful selection of components and design of the filter.
Band Pass filter will suppress any harmonic emission from your linear amplifier.
More measured results with HP8753ES network analyzer full two port calibrated.
HF + 50MHz:
144-146-148MHz Zoomed:
Suppression of harmonics and interfering signals::
2m 144, 146, 148MHz 1.5kW Band-Pass filter with high suppression out of band signals.
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