DIY "FM TRAP" or 88-108 MHz Band STOP filter - Among the few "blockers" the most called are the broadcast WFM transmitters. Simple way to solve the problem is to filter the received signals using the "FM TRAP". So called "FM TRAP" is nothing more than a simple Band stop filter for the frequency range of 88-108Mhz. They became really available and so cheap this days that making them at home is more time consuming then money saving.
Broadcast FM Band Stop Filter 88-108 MHz FM Trap with SMA male to SMA male adapter
Description:
Blocks the broadcast FM band between 88 – 108 MHz with over 50dB of attenuation.
Designed for maximum attenuation between 88 - 108 MHz and the 3dB roll off points are at 76 MHz and 122 MHz.
Insertion loss is less than 0.5 dB between 0 – 1 GHz, and mostly less than 1.5 dB between 1 – 3 GHz.
Uses SMA female connectors. Comes with a free SMA male to SMA male adapter.
A broadcast FM block filter can help if you have very strong broadcasts in your area that are overloading the SDR dongle.
Specification:
Size: 27.5x25.5mm/1.1x1"
Package Includes:
1x Broadcast FM Band Stop Filter
1x SMA male to SMA male adapter
Note:
RX filter only. Designed for SDR users, but might also be useful for TV users struggling with FM interference.
But TV users please carefully check the spectrum analyzer graphs and 3dB roll off points to ensure that it will not block a TV signal of interest. e.g.
Channels between 76 - 88 MHz could be attenuated enough to lose reception.
To order e-mail to:
hadisyarief@gmail.com
Whatsapp : +6287774323525
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