40 meter High power band pass filter – 4 kW

40 meter High power band pass filter – 4 kW

239,00 

SKU: 5520 Categories: ,

40 meter 4000 W High Power Band Pass Filter

High power 40 meter 7 – 7.3 MHz band pass filters for BIG GUNS.

Bandpass filter is perfect for multi-station environments like special events, field days, and portable operating to protect receivers from excessively strong out-of-band signals. Our 40-meter filter is designed to have an extremely low loss from 7 – 7.3 MHz (40-meter band) and it is 0.12 dB! Out-of-band interference is extremely suppressed. The filter is ideal to be on both reception and transmission. The 40-meter bandpass filter is declared at 4000 W, but the filter is designed for more power than presented. The Bandpass filter is placed in a powder-coated aluminum box. Silver-plated SO239 connectors and excellent filter design enable extremely low losses through 40 40-meter bands and high attenuation of out-of-band signals.

Specifications

Frequency Range: 7 – 7.3 MHz
Insertion loss: 0.12 dB
Input Return Loss: -32 dB
Attenuation on the nearest band: 35 – 55 dB
Nominal input impedance: 50 Ohm
Maximum power input at SWR 1:1: 4000 W
Maximum power input at SWR 1:1: 3200 W
Maximum power input at SWR 1:1: 2500 W
Maximum power input at SWR 1:1: 2000 W
Connectors: SO239 or “N”

External look. A 40-meter band pass filter is placed inside the powder-coated aluminum box. SO239 connectors are silver-plated.

 

40 meter band pass filter Top Side Look

Measured data with HP8753ES full 2-port calibrated is presented below.

1. Out-of-band measurements with graph.

Ham Radio Bands and their Attenuation (more than)
160 meter: 45 dB
80 meter: 45 dB
20 meter: 45 dB
15 meter: 35 dB
10 meter: 40 dB

 

Out-of-band measurements on 40 meter filter

 

2. Return loss (S11) from the 40-meter 4000 W bandpass filter.

 

Return Loss from 40 meter filter - S11 and S21 Measurement

 

3. S21 Measurement from the filter. Points: 7 – 7.3 MHz. A flat line and extremely low loss are shown:

 

S21 Measurement. Low Loss and Flat curve from 7 to 7.3 MHz

 

4. Actual box size 40-meter bandpass filter. The filter is placed and closed with a strong aluminum box. The filter is designed and adjusted together with the box so that the shown and measured characteristics are identical.

 

Actual 40 meter box size. Silver plated connectors and powder-coated aluminum box.

 

5. High power band-pass filter Power Derating Chart and Label.

 

7 MHz 4 kW band-pass filter (40 meter band) - Powder Derating Chart

 

Similar HF Band Pass filters:

160-meter band: 160-meter High power band pass filter – 4 kW

80-meter band: 80-meter High power band pass filter – 4 kW

20-meter band: 20-meter High power band pass filter – 4 kW

15-meter band: 15-meter High power band pass filter – 4 kW

10-meter band: 10-meter High power band pass filter – 4 kW

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