12 meter band pass filter WARC


12 meter 2000 W High Power Band Pass Filter

High power 12 meter 24.890 – 24.990 MHz MHz band pass filters for 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 12 meter filter is designed to have 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 band pass filter is declared at 2000 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 12 meters band 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 it is also perfect for less power. Since its low loss, 24.890 – 24.990 MHz WARC band pass filter is perfect for transmitting as well for 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 better than – 32 dB
Attenuation on 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 meter to 15 meter:

12m BPF 160 meter - 15meter Measurement

3. 10 meter attenuation from 12 meter band pass filter:

12 meter band pass filter 10 meter attunuation

Out-of-band measurements from graphs:

Ham Radio Bands 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 band pass filter images:

12 meter WARC with FAN