80m HF 6000W Band Pass Filter. Designed to last.

High power 80 meters 3.5 – 4 MHz band pass filters for EXTREME BIG GUNS

Bandpass filter is perfect for a multi-station environment like special events, field days, and portable operating to protect receivers from excessively strong out-of-band signals. Our 80-meter filter is designed to have an extremely low loss from 3.5 – 4 MHz (80-meter band) and it is less than 0.1 dB! Out-of-band interference is extremely suppressed. The filter is ideal to be on both reception and transmission. The 80-meter bandpass filter is declared at 6000 W, but the filters are 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 an 80-meter band and high attenuation of out-of-band signals.

External and internal look from the 3.5 – 4 MHz bandpass filter.

1. External look. Strong powder-coated aluminum box with silver-plated SO239 connectors. 12 V external powered fan for filter cooling is included.

 

 

2. Internal look. Inside the filter are high-Q coils.

 

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

1. 4000 W 80 meter 3.5 – 4 MHz band-pass filter S11 / S21 measurements. Part 1.

 

 

2. 4 kW 80 meter 3.5 – 4 MHz band-pass filter S11 / S21 measurements. Part 2.

 

 

High power band pass filter 3.5 – 4MHz Power Derating Chart.

 

Electrical and Mechanical specifications:

Electrical Specifications

Frequency Range: 3.5 MHz – 4 MHz
Insertion Loss: < 0.09 dB
Input Return Loss: -32 dB
Nominal Input Impedance: 50 Ohms
Attenuation on Nearest Band: 35 dB – 55 dB
Maximum Power Input at SWR 1:1: 6000 W
Maximum Power Input at SWR 1:1.5: 3800 W
Maximum Power Input at SWR 1:2: 3000 W
Maximum Power Input at SWR 1:3: 2500 W

Mechanical Specifications

Connectors: SO239 Default or 7/16 DIN by Order*
Filter Size: 455 mm x 220 mm x 135 mm
Fan Power Consumption: +12 V DC, 200 mA**
BandPass Filter Net Weight: 3.4 kg
Mounting: Any position (5 mm hole)
Work Environment: Indoor
** Fan usage is not required for power below 1500 W.

Did you know that we produce up to 10 kW (10 000 W) bandpass filters for all HF bands: 160 meters, 80 meters, 40 meters, 20 meters 15 meters, and 10 meters? If you need more power handling feel free to send us an inquiry via e-mail.

 

HF band-pass filters designed for 4000 W can be found here: HF Band-Pass Filters

Other 6000 W bandpass filters:

40-meter band: 6000 W 40 meter bandpass filter

20-meter band: 6000 W 20 meter bandpass filter

15-meter band: 6000 W 15 meter bandpass filter