Three different filters are available: M1F4N 250 W with N connector; M1F4Q 500 W with N connector and M1F4R 500 W with 7/16 connector.
The M1F4 filters are one-quarter wavelength coaxial cavities, with high quality, conceived for 87,5 ÷ 108 MHz band. Using a double cavity band pass installed between the transmitter and the antenna, they drastically reduce spurious signals, besides other intermodulations.
| Frequency |
87.5 - 108 MHz |
| RF output power |
250 W - 500 W |
| RF Connector output |
N - 7/16 |
| Operating temperature |
-10°C ÷ +50°C |
| Overall dimensions (W x H x D) |
48,2 x 13,2 x 57,8 cm |
| Weight |
4 Kg. |
The M1F4 is a double filter with rotating loops allowing easy tuning of the circuit for a different sideband attenuation and with a variable coupling.
The M1F4 has an heat sink on the rear panel to increase the dissipation of the high Temperature.
The dimensions of the filter M1F4 allow the installation in a 19” rack.
