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

Band pass filter is perfect for multi-station environment like special events, field day, portable operating to protect receivers from excessively strong out-of-band signals. Our 40 meter filter is designed to have extremely low loss from 7 – 7.3 MHz (40 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 40 meter band pass filter is declared at 6000 W, but filters is designed for more power than presented. Band pass filter is placed in a powder-coated aluminum box. Silver-plated SO239 connectors and excellent filter design enable extremely low losses through 40 meters band and high attenuation of out-of-band signals.

 

2. Electrical specifications of 40 meter High Power Band pass Filter 6 kW for Ham Radio.

 

Specifications
Frequency Range:	7.0 – 7.3 MHz
Insertion Loss:	0.09 dB
Input return loss better than	– 30 dB
Attenuation on nearest band:	42 – 60 dB
Nominal Impedance:	50 Ohm
Maximum Power Input at SWR 1:1	6000 W
Maximum Power Input at SWR 1:1.5	5700 W
Maximum Power Input at SWR 1:2	5500 W
Maximum Power Input at SWR 1:3	5000 W
Short Period of Time at 1:1	8000 W
Connectors:	SO239 or “N”
Fan:	+12V, 0.2 A

 

Physical length of the HF bandpass filter.

 

 

 

There is no need to use the fan if power is less than 4 kW.

 

 

Inside the filter are very high-Q coils.

 

 

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

6 kW 40m 7 – 7.3 MHz Band-Pass Filter S21 (forward) full range to 30 MHz.

 

 

6 kW 7 MHz Band-Pass Filter S21 (forward) zoom 7 – 7.3 MHz

 

 

High power Band-Pass Filter 7 MHz 6 kW Power Derating Chart.

 

 

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

 

Other 6000 W band pass filters:

80 meter band: 6000 W 80 meter band pass filter

20 meter band: 6000 W 20 meter band pass filter

15 meter band: 6000 W 15 meter band pass filter