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RF Filters

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ARF-1000 Ameritron RF Filter 1.5-30MHz 1kW PEP ARF-1000 Ameritron RF Filter 1.5-30MHz 1kW PEP
* Frequency range 1.5 - 30MHz in 6 bands * Handles 1kW PEP, 600W CW, 400W RTTY * SO-239 connectors * Size 139.7 x 89 x 242mm

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. 


Price:  £149.95  / €
              (£127.62  / €  / US$  Exc VAT)


Quantity:


DCI-145-2H 2m Band Pass Filter DCI-145-2H 2m Band Pass Filter
* Passband: 144-146MHz * Loss: < 1dB * Selectivity: -68dB at 136MHz, -55dB at 155MHz * Power: 200W * VSWR 1.5:1 * Sockets: SO-239 * Case size: 304 x 76 x 127mm * Weight: 1.21kg

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.  


Price:  £159.95  / €
              (£136.13  / €  / US$  Exc VAT)


Quantity:


DCI-145-2HN 2m Band Pass Filter DCI-145-2HN 2m Band Pass Filter
* Passband: 144-146MHz * Loss: < 1dB * Selectivity: -68dB at 136MHz, -55dB at 155MHz * Power: 200W * VSWR 1.5:1 * Sockets: N-type * Case size: 304 x 76 x 127mm * Weight: 1.21kg

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.  


Price:  £169.95  / €
              (£144.64  / €  / US$  Exc VAT)


Quantity:


DCI-435-10C 70cm Band Pass Filter DCI-435-10C 70cm Band Pass Filter
* Passband: 430-440MHz * Loss: typically 1dB * Selectivity: -47dB at 415MHz, -50dB at 455MHz * Power: 200W * VSWR 1.5:1 * Sockets: N-type * Case size: 304 x 76 x 190mm * Weight: 2.04kg

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.  


Price:  £179.95  / €
              (£153.15  / €  / US$  Exc VAT)


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DCI-145/435-DB 2m / 70cm Band Pass Filter DCI-145/435-DB 2m / 70cm Band Pass Filter
* Passband: 144-146MHz (centred on 145MHz) * Selectivity: -1.17dB at 144MHz, -1.09dB at 146MHz * Passband: 430-440MHz (centred on 435MHz) * Selectivity: -0.75dB at 430MHz, -0.68dB at 440MHz * Loss: < 1dB * DC grounded * Power: 200W * VSWR 1.1:1 * Sockets: N-type * Case size: 203 x 100 x 68mm * Weight: 1.7kg

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. 


Price:  £229.95  / €
              (£195.70  / €  / US$  Exc VAT)


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DCI-145/435DX-DB  2m / 70cm Band Pass Filter DCI-145/435DX-DB 2m / 70cm Band Pass Filter
* Passband: 144-146MHz (centred on 145MHz) * Bandwidth 2MHz * Approx 3dB BW ±1.7MHz, Approx 30dB BW - ± 4MHz, Approx 50dB BW -7/+7.5MHz * VSWR 1.4:1 * Return Loss >16dB * Impedance 50 Ohms * Passband: 430-440MHz (centred on 435MHz) * Bandwidth 10MHz * Approx 3dB BW ±7.3MHz, Approx 30dB BW -15MHz + 16MHz, Approx 50dB BW -25/+30MHz * VSWR 1.3:1 * Return Loss >18dB * Impedance 50 Ohms * Sockets: N-type x3 * Case size: 203 x 101 x 101mm * Weight: 1.58kg

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.  


Price:  £249.95  / €
              (£212.72  / €  / US$  Exc VAT)


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HPF-1 Vectronics High Pass TVI Filter HPF-1 Vectronics High Pass TVI Filter
High Pass Filter for American TV bands 



Price:  £21.95  / €
              (£18.68  / €  / US$  Exc VAT)


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HPF-2 MFJ Deluxe High Pass TVI Filter HPF-2 MFJ Deluxe High Pass TVI Filter
High Pass Filter for American TV bands 



Price:  £25.95  / €
              (£22.09  / €  / US$  Exc VAT)


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MFJ-700A  Ferrite Suppression Choke for RG-58/59/6U/8X MFJ-700A Ferrite Suppression Choke for RG-58/59/6U/8X
 



Price:  £3.50  / €
              (£2.98  / €  / US$  Exc VAT)


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MFJ-700A4  Ferrite Suppression Choke for RG-58/59/6U/8X pack of 4 MFJ-700A4 Ferrite Suppression Choke for RG-58/59/6U/8X pack of 4
 



Price:  £12.95  / €
              (£11.02  / €  / US$  Exc VAT)


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MFJ-700B  Ferrite Suppression Choke for RG-213/6X MFJ-700B Ferrite Suppression Choke for RG-213/6X
 



Price:  £3.95  / €
              (£3.36  / €  / US$  Exc VAT)


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MFJ-700B4  Ferrite Suppression Choke for RG-213/6X pack of 4 MFJ-700B4 Ferrite Suppression Choke for RG-213/6X pack of 4
 



Price:  £14.95  / €
              (£12.72  / €  / US$  Exc VAT)


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MFJ-700C  Ferrite Suppression Choke for RG-11/8U MFJ-700C Ferrite Suppression Choke for RG-11/8U
 



Price:  £4.95  / €
              (£4.21  / €  / US$  Exc VAT)


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MFJ-700C4  Ferrite Suppression Choke for RG-11/8U pack of 4 MFJ-700C4 Ferrite Suppression Choke for RG-11/8U pack of 4
 



Price:  £17.95  / €
              (£15.28  / €  / US$  Exc VAT)


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MFJ-700D  Ferrite Suppression Choke for LMR600 MFJ-700D Ferrite Suppression Choke for LMR600
 



Price:  £5.95  / €
              (£5.06  / €  / US$  Exc VAT)


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MFJ-700D4  Ferrite Suppression Choke for LMR600 pack of 4 MFJ-700D4 Ferrite Suppression Choke for LMR600 pack of 4
 



Price:  £22.95  / €
              (£19.53  / €  / US$  Exc VAT)


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MFJ-700P9  Ferrite Suppression Choke combination pack of 9 MFJ-700P9 Ferrite Suppression Choke combination pack of 9
 



Price:  £32.95  / €
              (£28.04  / €  / US$  Exc VAT)


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MFJ-701 RFI Choke Kit MFJ-701 RFI Choke Kit
RFI Choke Kit (4-pieces) no need to take off plugs. 



Price:  £22.95  / €
              (£19.53  / €  / US$  Exc VAT)


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MFJ-702B Low Pass Filter 200W 1.5-30MHz 50 Ohm MFJ-702B Low Pass Filter 200W 1.5-30MHz 50 Ohm
Low Pass Filter 200W 1.5-30MHz 50 Ohm 



Price:  £44.95  / €
              (£38.26  / €  / US$  Exc VAT)


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MFJ-704 Low Pass Filter MFJ-704 Low Pass Filter
* Pass band 1.8-30MHz 1kW max. * Insertion loss <0.5dB * Connectors SO-239 * Size 200 x 75 x 75mm * Weight 430g

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. 


Price:  £54.95  / €
              (£46.77  / €  / US$  Exc VAT)


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MFJ-705  Low Pass TVI filter High power handling 2.5kW MFJ-705 Low Pass TVI filter High power handling 2.5kW
* Pass band 0-30MHz * Cut-off frequency 35MHz * Attenuation 60MHz - 60dB * Power handling 2.5kW continuous, 4kW PEP * Impedance 52 Ohms * Insertion loss <0.5dB max @ 30MHz * VSWR 1.3:1 8 9-pole Chebyshev design * RF connectors 2x SO-239 * Size 242 x 61 x 108mm * Weight 1kg

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). 


Price:  £119.95  / €
              (£102.09  / €  / US$  Exc VAT)


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MFJ-711B High Pass Filter 75 Ohm MFJ-711B High Pass Filter 75 Ohm
High Pass Filter 75 Ohm 



Price:  £26.95  / €
              (£22.94  / €  / US$  Exc VAT)


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MFJ-713 MFJ 2m Intermod Filter (BNC) MFJ-713 MFJ 2m Intermod Filter (BNC)
* 144 - 148MHz bandpass filter * Up to 50dB rejection * Defaults to straight through when off * Requires at least 50mW for auto sensing * For handhelds * Termination BNC * Size 70 x 50 x 45mm approx. * Power: PP3 battery (not supplied).

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.  


Price:  £69.95  / €
              (£59.53  / €  / US$  Exc VAT)


Quantity:


MFJ-714 MFJ 2m Intermod Filter (SO-239) MFJ-714 MFJ 2m Intermod Filter (SO-239)
* 144 - 148MHz bandpass filter * Up to 50dB rejection * Defaults to straight through when off * Requires at least 50mW for auto sensing * For mobiles * Termination SO-239 * Size 70 x 50 x 45mm approx. * Power: External 12V DC supply

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. 


Price:  £69.95  / €
              (£59.53  / €  / US$  Exc VAT)


Quantity:


LF-30A Kenwood Low Pass Filter LF-30A Kenwood Low Pass Filter
* Cut off Freq. 30MHz * Max att. 90dB (above 90MHz) * Sockets SO-239 * Max power 1kW * Size 244 x 50 x 40mm

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. 


Price:  £45.95  / €
              (£39.11  / €  / US$  Exc VAT)


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LP-30 Vectronics Low Pass Filter LP-30 Vectronics Low Pass Filter
* Impedance 52 Ohms * Insertion loss 0.25dB @ 30MHz * Sockets SO-239 * Max power 1.5kW * Filter 9-pole Chebyshev * Size 222 x 76 x 70mm

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.  


Price:  £74.95  / €
              (£63.79  / €  / US$  Exc VAT)


Quantity:


LP-2500 Vectronics Low Pass Filter LP-2500 Vectronics Low Pass Filter
* Impedance 52 Ohms * Insertion loss 0.25dB @ 30MHz * Sockets SO-239 * Max power 2.5kW * Filter 9-pole Chebyshev * Size 242 x 108 x 60mm

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.  


Price:  £114.95  / €
              (£97.83  / €  / US$  Exc VAT)


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RFF-213 Ferrite Core Block for RG-213 RFF-213 Ferrite Core Block for RG-213
Easy to fit ferrite core block specially designed for fitting onto RG-213 coax cable. Position it on the cable and just snap the two halves of the block together. Can be reused. Useful for preventing RF currents flowing back onto transceiver chassis, avoiding incorrect readings on VSWR meters and as a general TVI preventavtive measure. Two types avaliable RFF-213 and RFF-58.

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.

 


Price:  £5.95  / €
              (£5.06  / €  / US$  Exc VAT)


Quantity:


RFF-58 Ferrite Core Block for RG-58 RFF-58 Ferrite Core Block for RG-58
Easy to fit ferrite core block specially designed for fitting onto RG-58 coax cable. Position it on the cable and just snap the two halves of the block together. Can be reused. Useful for preventing RF currents flowing back onto transceiver chassis, avoiding incorrect readings on VSWR meters and as a general TVI preventavtive measure. Two types avaliable RFF-213 and RFF-58.

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.

 


Price:  £3.95  / €
              (£3.36  / €  / US$  Exc VAT)


Quantity:


VEC-813 Vectronics 2m Intermod Filter (BNC) VEC-813 Vectronics 2m Intermod Filter (BNC)
* 144 - 148MHz bandpass filter * Up to 50dB rejection * Defaults to straight through when off * Requires at least 50mW for auto sensing * For handhelds * Termination BNC * Size 70 x 50 x 45mm approx. * Power: PP3 battery (not supplied).

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.  


Price:  £59.95  / €
              (£51.02  / €  / US$  Exc VAT)


Quantity:


VEC-814 Vectronics 2m Intermod Filter (SO-239) VEC-814 Vectronics 2m Intermod Filter (SO-239)
* 144 - 148MHz bandpass filter * Up to 50dB rejection * Defaults to straight through when off * Requires at least 50mW for auto sensing * For mobiles * Termination SO-239 * Size 70 x 50 x 45mm approx. * Power: External 12V DC supply

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. 


Price:  £59.95  / €
              (£51.02  / €  / US$  Exc VAT)


Quantity:


WHP-4A Watson TVI Filter WHP-4A Watson TVI Filter
A high quality coax filter designed to be used in series with the TV antenna lead. Just plug in the back of the TV set or video recorder and then insert antenna into filter. Incorporates high pass and braid breaker filters for excellent rejection of 430MHz and below. Fitted Belling Lee connectors. 



Price:  £9.95  / €
              (£8.47  / €  / US$  Exc VAT)


Quantity:

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