12 meter band pass filter WARC

12 meter band pass filter WARC


SKU: 5580 Categories: ,

12 meter 2000 W High Power Band Pass Filter

High power 12 meter 24.890 – 24.990 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 12-meter filter is designed to have an extremely low loss from 24.890 – 24.990 (12-meter band) and it is just 0.4 dB! Out-of-band interference is extremely suppressed. The filter is ideal to be on both reception and transmission. The 12-meter bandpass filter is declared at 2000 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 12 12-meter bands and high attenuation of out-of-band signals.

WARC bands.

The WARC bands are three portions of the shortwave radio spectrum used by licensed and/or certified amateur radio operators. They consist of 30 meters (10.100–10.150 MHz), 17 meters (18.068–18.168 MHz), and 12 meters (24.890–24.990 MHz). They were named after the World Administrative Radio Conference. This WARC filter can be used for power up to 2 kW but is also perfect for less power. Since its low loss, the 24.890 – 24.990 MHz WARC bandpass filter is perfect for transmitting and receiving.

12 meter 2 kW band-pass filter 24.890–24.990 MHz appearance.

12 meter band pass filter - WARC Band


Specifications and graphs.


Frequency Range: 24.89 – 24.99 MHz
Insertion Loss: 0.4 dB
Input return loss: – 32 dB
Attenuation on the nearest band: 35 – 50 dB
Nominal Impedance: 50 Ohm
Maximum Power Input at SWR 1:1: 2000 W
Maximum Power Input at SWR 1:1.5: 1500 W
Maximum Power Input at SWR 1:2: 1150 W
Maximum Power Input at SWR 1:3: 950 W
Connectors: SO239 or “N”

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

28 – 29 MHz 4 kW 40-meter Band-Pass Filter measurements.


12 Meter Band Pass Filter Near Band Attunuation


2. HF Band attenuation from 160 meters to 15 meters:


12m BPF 160 meter - 15meter Measurement


3. 10-meter attenuation from 12-meter bandpass filter:


12 meter band pass filter 10 meter attunuation


Out-of-band measurements from graphs:

Ham Radio Bands and their Attenuation (more than)
160 meter: 100 dB
80 meter: 80 dB
40 meter: 60 dB
20 meter: 42 dB
15 meter: 50 dB
10 meter: 35 dB
6 meter: 21 dB

12-meter bandpass filter images:

12 meter WARC with FAN


HF bandpass 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

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

WARC bandpass filters:

30-meter band: 30-meter bandpass filter WARC

17-meter band: 17-meter band pass filter WARC


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