15 meter 4000 W High Power Band Pass Filter
High power 15 meter 21 – 21.45 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 15 meter filter is designed to have extremely low loss from 21 – 21.45 MHz (15 meter band) and it is just 0.12 dB! Out-of-band interference is extremely suppressed. The filter is ideal to be on both reception and transmission. The 15 meter band pass filter is declared at 4000 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 15 meters band and high attenuation of outof-band signals.
Electrical specifications.
| Specifications | |
| Frequency Range: | 21.0 – 21.45 MHz |
| Insertion Loss: | 0.12 dB |
| Input return loss better than | – 35 dB |
| Attenuation on nearest band: | 35 – 55 dB |
| Nominal Impedance: | 50 Ohm |
| Maximum Power Input at SWR 1:1 | 4000 W |
| Maximum Power Input at SWR 1:1.5 | 3200 W |
| Maximum Power Input at SWR 1:2 | 2500 W |
| Maximum Power Input at SWR 1:3 | 2000 W |
| Connectors: | SO239 or “N” |
Measured characteristics and graph. 1. Out-of-band measurements.
| Ham Radio Bands | Attenuation (more than) |
|---|---|
| 160 meter | 65 dB |
| 80 meter | 55 dB |
| 40 meter | 40 dB |
| 20 meter | 50 dB |
| 10 meter | 65 dB |
2. The recorded data on the assembled filter with HP8753ES full 2-port calibrated are presented below. This graph shows S parameters from 15 meter band pass filter from 1 MHz to 30 MHz. Insertion loss – S21 on main frequency is less than 0.12 dB!
Actual box size 15 meter band pass 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 21 MHz Power Derating Chart.
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
20 meter band: 20 meter High power band pass filter – 4 kW
10 meter band: 10 meter High power band pass filter – 4 kW
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