hamradionl
Member
- Joined
- Mar 23, 2014
- Messages
- 730
Hi all,
For use with my RTL-SDR and in my local area due very heavy RF overload coming from 1.0 kW RF power Digital TV on 490MHz, 500, 700 MHz and LTE, 3G/4G from 800, 900 MHz
Needed a UHF bandpass or lowpass filters for receiving 420 - 450 MHz, after search found this page and order UHF bandpass filters. I tested and working. This type UHF filter also stop 87 - 108 MHz so in my case i removed the FM bandstop filter and needed only this filter doing it all and bring a 3 - 5 dB extra signal strength on UHF.
They also have airband filters and VHF filters. Shipping to Europe it take some weeks to arrive.
Picture
- without filter see red color very strong signal
- using a filter see yellow color signal go down and above 600 MHz signals are gone.
For use with my RTL-SDR and in my local area due very heavy RF overload coming from 1.0 kW RF power Digital TV on 490MHz, 500, 700 MHz and LTE, 3G/4G from 800, 900 MHz
Needed a UHF bandpass or lowpass filters for receiving 420 - 450 MHz, after search found this page and order UHF bandpass filters. I tested and working. This type UHF filter also stop 87 - 108 MHz so in my case i removed the FM bandstop filter and needed only this filter doing it all and bring a 3 - 5 dB extra signal strength on UHF.
They also have airband filters and VHF filters. Shipping to Europe it take some weeks to arrive.
Picture
- without filter see red color very strong signal
- using a filter see yellow color signal go down and above 600 MHz signals are gone.
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