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70 cm High Power Low Pass – Notch Filter 4000 W
Designed for extreme suppression of main harmonics of 432 MHz linear amplifiers.
Integrated Low Pass filter attenuates other frequencies from 15 to 40 dB up to 6Ghz
Where to use this filter?
– If you have trouble with FCC, BNetzA or other EMC agencies
– if you have trouble with harmonics of your 70cm linear amplifier
– TVI problem
– Prolem with harmonics on 23cm stations
– General problem with 70cm transmitter harmonics.
The recorded data on the assembled filter with HP8753ES network analyzer full 2-port calibrated are presented below.
430 MHz 0.13 dB
432.1 MHz 0.14 dB. Input RL better than -30dB
440 MHz 0.14 dB
864.2 MHz > 60 dB
1296.3 Mhz > 70 dB
2450 Mhz 30 dB
Maximum Power Input at SWR:
1:1 = 4000 W
1:1.5 = 3100 W
1:2 = 2500 W
1:3 = 2000 W
70cm 430 – 440MHz High Power Low Pass Notch Filter 4 kW Attenuation:
70cm 430 – 440MHz High Power Low Pass Notch Filter 4kW Zoomed
70cm 430 – 440MHz High Power Low Pass Notch Filter 4kW S21
70cm 430 – 440 MHz High Power Low Pass Notch Filter 4 kW
Feel free to send e-mail if you need something more specific.
All band-pass filters are here: HF, VHF and UHF Band-Pass Filters
Direct link to all 70 cm filters. We have 50 W, 100 W, 200 W, 300 W, 1000 W and 2500 W versions: 70 cm Band-Pass Filters