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The ARF-1000 filter designed to be used with a transceiver or amplifier to reduce unwanted harmonics.
It has a frequency select switch which can select one of six different frequency ranges (1.5 to 30MHz) and reduces harmonics above the cut-off frequency.
No more breakthrough from pagers etc. These are high-quality professional filters that have razor sharp edges, which will eliminate reception problems caused by strong local out of band signals. They can dramatically improve reception, particularly as most modern rigs now have very wide receiver front ends. Construction is based on four aluminium sections each housing a helical resonator with aperture coupling giving a 2MHz passband over 144 to 146MHz with insertion loss less than 1dB.Two versions available, SO-239 or N-type.
No more breakthrough from pagers etc. These are high-quality professional filters that have razor sharp edges, which will eliminate reception problems caused by strong local out of band signals. They can dramatically improve reception, particularly as most modern rigs now have very wide receiver front ends. Construction is based on four aluminium sections each housing a helical resonator with aperture coupling giving a 2MHz passband over 144 to 146MHz with insertion loss less than 1dB.Two versions available, N-type or SO-239.
This 70cm filter is of similar construction to the 2m filter based on four sections with aperture coupling, but uses full size quarter-wave resonators instead, hence the larger size. The bandwidth is 20MHz over 430 to 440MHz, the insertion loss is typically 1dB on 70cm.
This bandpass filter is specifically for use with dualband rigs and dualband antennas. These rigs and antennas normally only have one 50 Ohm connection. It can be used with separate rigs, but external duplexers would have to be employed. The DCI-145/435-DB is symetrical so either coax connector can be connected to the antenna. Of course with this filter in line, all wideband signals will be lost, with only 2m and 70cm being allowed through.
This bandpass filter is specifically for dualband rigs with separate 2m and 70cm outputs. These rigs would normally be fed by separate antennas or fed from a duplexer at 50 Ohms.
This is a full size low pass filter designed for HF operation from 1.8MHz to 30MHz. Within this range it has virtually no loss and is the classic way of making sure you are not transmitting harmonics.
It is always good practice to use a Low Pass Filter between a transmitter or amplifier and the antenna especially when high power is used. This filter exhibits low loss to frequencies up to 30MHz and suppresses any harmonics appearing on the output above those frequencies especially TVI ( television interference).
A three section high-Q bandpass filter for 2m handhelds. RF sensing bypasses it on transmit. Internal power is via a PP3 battery (not supplied). The unit will dramatically reduce interference caused by out of band transmissions by up to 50dB.
A three section high-Q bandpass filter for 2m mobiles. RF sensing bypasses it on transmit. Power is from an external 12V DC supply (not supplied). The unit will dramatically reduce interference caused by out of band transmissions by up to 50dB. Max handling power is 50W. When switched on there is a 6dB insertion loss, but this is probably acceptable compared with the improvement gained.
Made by Kenwood, this low pass filter is ideal for suppressing harmonics from HF transceivers operating up to 30MHz. The unit has been in production for quite a few years and is well respected by ham radio operators around the world.
Suitable for use with TS-2000, TS870 & TS-570.
The Vectronics LP-30 Low Pass Filter reduces TVI caused by harmonics from your transmitter. Features a 9-pole Chebyshev design, insertion loss is only 0.25dB at 30MHz. Handles up to 1500W key down.
The Vectronics LP-2500 Low Pass Filter reduces TVI caused by harmonics from your transmitter. Features a 9-pole Chebyshev design, insertion loss is only 0.25dB at 30MHz. Handles up to 2500W key down.
The cores are effective over the range 1 to 300MHz and are equivalent to six ferrite beads in series, but with a higher impedance and more extended frequency range.
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