20 meter 4000 W High Power Band Pass Filter

High power 20 meter 14 – 14.35 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 20-meter filter is designed to have an extremely low loss from 14 – 14.35 MHz (20-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 20-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 20-meter bands and high attenuation of out-of-band signals.

20-meter bandpass filter external appearance.

 

 

Electrical specifications of the 4 kW HF Bandpass (14 – 14.35 MHz, 20-meter Band) are given in the table below.

Specifications

Frequency range: 14 – 14.35 MHz
Insertion loss: 0.12 dB
Input return loss: -35 dB
Attenuation on the nearest band: 35 – 55 dB
Nominal 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: 2600 W
Maximum power input at SWR 1:1: 2000 W
Connectors: SO239 or “N”

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

 

4000 W 14 – 14.35 MHz Band-Pass Filter S11 and S21 measurements.

 

 

Out-of-band measurements.

 

Ham Radio Bands and their Attenuation (more than)
160 meter: 45 dB
80 meter: 38 dB
40 meter: 50 dB
15 meter: 60 dB
10 meter: 45 dB

Actual box size 20-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.

 

 

High power Band-Pass Filter 14 MHz Power Derating Chart and label:

 

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

40-meter band: 40-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