144 - 148 MHz 100 W Receive/Transmit Bandpass Filter

• 

• Description

144MHz - 148MHz 100 W 0.15 dB Super Low Loss Receiving and Transmitting Band Pass Filter

Intended for use with transceivers and transverters up to 100 W output, or before any wide band low noise amplifier (LNA) to protect from out of band signals.

This filter is equally good as transmitting and as receiving filter with super low loss (0.15 dB). 

Super low insertion loss. Excellent to put before any LNA or protect receiver from HF transmitters. This band-pass filter 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 neighbors with strong HF, 6 meter or 70 cm transmitters.

The recorded data on the assembled filter with HP8753ES network analyzer full 2-port calibrated are presented below.

Measured Return Loss (S11) and Insertion Loss (S21). Characteristics of 144 - 146 MHz Band pass filter with an pre-amplifier.

Achieved results on a built Bandpass filter:

1.82 MHz=-110 dB

3.8 MHz=-109 dB

7.1 MHz = -105 dB

14.15 MHz = - 90dB

21.2 MHz= -81 dB

28.4 MHz = -72 dB

50 MHz = -56 dB

54 MHz = -53 dB

70.2 MHz = -44 dB

88 MHz = -34 dB

108 MHz = -22 dB

144 MHz = -0.15 dB

145 MHz = -0.15 dB

146 MHz = -0.15 dB

148 MHz = -0.15 dB

Harmonics and interfering signals:

288 MHz = -34 dB

296 MHz = -36 dB

430 MHz = -51 dB

432 MHz = -52 dB

440 MHz = -53 dB

Maximum power input at SWR: 1:1 = 100 W; 1:1.5 = 85 W; 1:2 = 75 W; 1:3 = 65 W

These excellent results were achieved by careful selection of components and design of the filter.

More measured results with HP8753ES network analyzer full two port calibrated.

1. Measured HF Attenuation:

2. HF and 50 MHz band attenuation:

3. FM attenuation:

4. 144 - 146 MHz band attenuation. Here you can see excellent flatness on 2 meters band. Insertion loss is set to 0.2 dB per division in next display! Attenuation on 144 MHz: -0.15 dB, 145 MHz: -0.15 dB, 146 MHz: -0.15 dB, 148 MHz: -0.15 dB.

5. Harmonic and UHF attenuation.

2 meter: 144, 146, 148 MHz 100 W Band-Pass filter with high suppression out of band signals.

100W transmitting and receiving band-pass filter could be used for outdoor mounting. Price difference 10 EUR (plastic box "DB" and two brackets).

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 preamplifier: 144 - 146 MHz High Selectivity, High Q, Low Loss Band pass Filter with SPF-5122Z Preamplifeir

2 meter band, 144 MHz Bandpass with PGA preamplifier: 144 - 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 Bandpass: 144 - 148 MHz Low Loss (<0.1 dB) High Power Band pass Filter 1.5 kW

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

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

You might also like to read about our 2 meter band antennas (144 MHz):2 Meter High Gain Low Noise Antennas for 144 MHz. Excellent G/T

• Product Code: 0653
• Availability: In Stock

• 139.00€

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Tags: 144MHz, 145MHz, 146MHz, 147MHz, 148MHz, 2Meters, 100W, Receiving, Receive, Transmitting, RFI, Band-Pass, Filter, BPF, VHF, BandPass, High, Q, Selectivity, Low, Loss, Field, Day, Ham, Radio