STOP FILTERS SCREW AND
TELESCOPIC ADJUSTMENT


 

The Stop Filters are used for suppressing of signals with undesired frequency in the transmitter output. These spurious frequencies can be the basic frequency harmonics or a result of interference between spurious signals in the non-linear tracts (amplifiers, generators, diodes etc.). Constructively the stop filters are simpler than the band-pass ones.

 

 

Technical parameters

 

 

Max output power

 

 up to 300 W up to 1000 W

 

Resonators (number)

 

 1 1

 

Construction type

 

 screw adjustment /
telescopic adj.		 screw adjustment /
telescopic adj.

 

Frequency range (FR)

 

 87.5 MHz – 136 MHz 87.5 MHz – 136 MHz

 

Rejector frequency Fo attenuation

 

  30 dB  35 dB

 

Attenuation for (Fo±0.5 MHz )

 

  10 dB  8 dB

 

Attenuation at lower frequencies (Fo -2MHz)

 

  1 dB  1 dB

 

Attenuation at higher frequencies (Fo +2MHz)

 

  1 dB  1 dB

 

Connector type (custom-made)

 

 50 Ω 50 Ω

 

SWR at the input and the output for the 40 MHz ¸ 160 MHz frequency range

 

  1,2  1,2

 

Operating temp.range

 

 from - 5  to + 45 ˚ from - 5  to + 45 ˚