144 - 148 MHz, 2 Meter band High Power Bandpass Filter 4000W

  • 144 - 148 MHz, 2 Meter band High Power Bandpass Filter 4000W

144 MHz - 148 MHz 4000 W <0.1 dB Low Loss Transmitting Band Pass Filter with "N" connectors

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

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.

Intended to be used with linear amplifiers. Some examples are 8877, GS35, GS31, OM1002+OM2002+, as well as with other tubes or transistors up to 4 kW output.

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 - 28 MHz stations, 50-54 MHz, 70 cm - 432 MHz (430 - 440 MHz).

This filter uses 7/16 DIN connector type. Similar Low Loss Band Pass Filter designed for 1500 W linear power output that uses "N" connectors.

Filter will reduce TVI problem or your problem with neighbors with strong RFI from HF, 6 meter or 70 cm transmitters.

2m-band-144MHz-4-kW-High-Power-Band-Pass-Filter-Low-Loss

Achieved results on a built Band-pass 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.


Measured data on the assembled filter with HP8753ES network analyzer full 2-port calibrated.

Measured Return Loss - S11 (CH 1) and Insertion Loss - S21 (CH 2). Characteristics of 144 MHz Transmitting Bandpass filter.

144-146-148-MHz-High-Power-Bandpass-Filter-4kW-Measured-Data-Made-By-Antennas-Amplifiers.com

2-Meter-Band-Pass-Filter-Low-Loss-4-kW

1. HF Suppression for 144 - 146 MHz 4000 W Band-pass filter:
2m-HP-Bandpass-Filter-4kW-High-Power-HF-Bands-Suppresion-Made-By-Antennas-Amplifiers

2. Suppression on 50 MHz (6 Meter band) for 144 - 146 MHz 4000 W Band-pass filter.
144MHz-Super-High-Power-Bandpass-Filter-4kW-50MHz-Suppresion-Made-By-Antennas-Amplifiers

3. Measured data of 144 - 146 - 148 MHz Low Loss RFI band-pass filter. Insertion loss - S21 (Attenuation).
2m-High-Power-Bandpass-Filter-4kW-Measured-Data-Zoomed
4. Suppression of harmonics and interfering signals:
144-148MHz-High-Power-Bandpass-Filter-4kW-Harmonics-Suppresion

Similar 144 MHz Band Pass filters:

2 meter band, 144 MHz Bandpass Receiver for Ham: 144 - 146 MHz High Selectivity, High Q, Low Loss Band pass Filter

2 meter band, 144 MHz Receiver Outdoor Bandpass: 144 - 146 MHz High Selectivity, High Q, Low Loss Band pass Filter Outdoor Mounting

2 meter band, 144 MHz Bandpass with SPF preamplifier144 - 146 MHz High Selectivity, High Q, Low Loss Band pass Filter with SPF-5122Z Preamplifeir

2 meter band, 144 MHz Bandpass with PGA preamplifier144 - 146 MHz High Selectivity, High Q, Low Loss Band pass Filter with PGA-103+ Preamplifeir

2 meter band, 144 MHz 100 W Bandpass for Ham: 144 - 148 MHz 100 W Receiving and Transmitting Band pass Filter

2 meter band, 144 MHz 200 W Bandpass for Ham: 144 - 146 MHz 200 W Receiving and Transmitting Band pass Filter

2 meter band, 144 MHz 1500 W Bandpass144 - 148 MHz Low Loss (<0.1 dB) High Power Band pass Filter 1.5 kW

2 meter band, 144 MHz 4000 W Bandpass144 - 148 MHz Low Loss (<0.1 dB) High Power Band pass Filter 4 kW

2 meter band, 144 MHz EME 3 Bandpass PGA preamplifier144 - 148 MHz EME 3 Filter Relay With Preamplifier


  • Product Code: 0664
  • Availability: In Stock
  • 209.00€


Tags: 144MHz, 145MHz, 146MHz, 147MHz, 148MHz, 2Meters, 4000W, 4kW, RFI, Band-Pass, Filter, BPF, VHF, BandPass, High, Q, Selectivity, Low, Loss, Field, Day, Ham, Radio