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Very strong signal at 162Mhz

Posted: Mon Dec 03, 2018 12:52 pm
by Jekko
I have an rtlsdr v3 dongle. The taxi cab central is just next to my house and it send very strong signals in NFM at 162Mhz.
This signals overload many frequencies nearby.
Does it exist a variable bandstop filter to purchase?
At the moment the only solution in my mind is the "stub" T filter.
Any ideas?
Thank you

Re: Very strong signal at 162Mhz

Posted: Mon Dec 03, 2018 7:06 pm
by Username
Theoretically you can make your own filter.
This Company sell Kits:
I would need some Filter my own. Are there a Design who allow to have an very sharp cut out?

Re: Very strong signal at 162Mhz

Posted: Tue Dec 04, 2018 6:57 pm
by dz93
What band are you trying to access? I assume VHF? If so, you're going to have a difficult time trying to use a hardware filter to block the taxi cab signal and still receive the desired signals. A band reject filter will block out the taxi signal and probably attenuate all signals in +/- 20-40mhz of that taxi signal depending on the reject filter. If you're trying to access signals in say the UHF band or HF band, then a band reject filter centered at or near the taxi signal would work perfect. You can probably find one on minicircuits for ~$30.00 or so.