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It’s great to reach a clean signal free of FM stations, broadcasts or whatever on modern equipments as ICOM IC7300. This filter is fully designed and manufactured from JG Hitechnology in Italy.
Elliptical filter with 7 cells, low pass 0-74MHz. Brass cells separator manufactured especially for this filter. Each cell shielding allows great performances as the possibility to transmit up to 74 MHz and to have at the same time a strong attenuation at 88 MHz of 40 dB(at 98 MHz of 50dB, see graph below). It also allows to cancel FM residuals through all the HF spectrum up to 74 MHz.
SO239 female - SO239 female