Filters

TVI filters to fit on your radio and TV, plus power lead filters to suppress noise in your power cable.

TVI Filters

These are used to try to eliminate interference caused by radio transmissions to TV's, HiFi's etc.
Low Pass filters fit on the radio, which is obviously easier but unfortunately often ineffective.
High Pass and Notch filters fit on the affected TV. These are usually much more effective, but unfortunately it can work out expensive if you are interfering with several TV's.

Power Filters

These fit in the 12V power lead to your radio to try to eliminate any electrical interference which is reaching the radio via the power lead.
Usually these are quite effective against alternator noise, but not against interference generated by much of the electronics in modern vehicles.
If the interference is reaching your radio through the antenna system, then obviously these filters will make no difference at all.

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AKD/Garex High Pass
X07
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garex
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High Pass Filter with Braid Breaker

These British made filters are certainly the most likely to cure your problem. Simply plugs into the back of your TV.

This is probably the best filter to try first, because it will eliminate most types of interference. Designed mainly to reject all signals below 30MHz.

Rejection of signals:

  • Outer: >25dB @ 30MHz and below
  • Inner:  >60dB @ 100MHz and below
  • Insertion Loss:  <2dB @ UHF

AKD/Garex Notch Filter
X08
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garex
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These British made filters are certainly the most likely to cure your problem. Simply plugs into the back of your TV.

If the interference is caused by CB, then this is the best filter to try because it is tuned especially to elinate interference around 27MHz.

These filters have a very low insertion loss of less than 1dB.

Rejection of signals:

  • Outer: >30dB @ 27.5MHz
  • Inner:  >35dB @ 27.5MHz

Model 151 Low Pass Filter
Y18
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tvi151
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A much better quality filter than the price suggests - it's just that we bought a load of them at the right price! Will cost over £10 when we need to replace them.

Made in Japan.  Standard SO239 (PL259) connections.  Complete with mounting bracket.

Maximum input 25W.

 

Zetagi Low Pass Filter
X11
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zetf27
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A higher power low pass TVI filter.

Maximum input power: 300W

Frequency: 0-30MHz

RM 27/586 Low Pass Filter
X586
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RM TVI
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High power low pass TVI filter from RM of Italy.

Frequency:  3-30MHz
Maximum Input:  500W Pep
Insertion loss:  0.5dB Max
Attenuation:  >80dB (60-900MHz)

Hot Line Filter
X15
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Usually £2.95, save £1 if bought online.

A heavy duty filter to fit into the 12V power lead to your radio to help eliminate interference in the power supply.

Simply cut the live wire and connect this filter in line.

NF-20 Dual Line Filter
Y17
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NF20 Dual Line Filter
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Sold Out - no more available

A filter which connects in both the +ve and -ve 12V supply lead to your radio.

Eliminates any interference entering the radio by the power lead, but will not make any difference if the interference is entering the radio by the antenna (which is often the case if the interference is caused by electronic or computerised equipment).

The best of this type of filter.

Maximum power 20A.

36mm Ferrite Rings
FR2
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ring
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Quantity Discount

Ferrite rings are very simply but also a very effective method of reducing various types of interference.

This is our most popular size, with an outer diameter 36mm, inner diameter 25mm and depth 7mm.

Ferrite Rings
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ring
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Ferrite rings are very simply but also a very effective method of reducing various types of interference.

Often fitted in power leads, TV coax leads, speaker leads, telephone leads etc.

Ferrite Ring Kit
FRK
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rings
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15 Different Size Rings

Ferrite rings are very simply but also a very effective method of reducing various types of interference.

Often fitted in power leads, TV coax leads, speaker leads, telephone leads etc.

This kit consists of 15 different size rings - there's certain to be one to fit your needs.

Clamp-0n Ferrite Filter
Y58
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Only ONE filer supplied
Only ONE filter supplied 
Quantity Discount

Similar in use to ferrite rings, but easier to use because they simply clamp over the cable. Ideal where cables have moulded plugs etc.

Very simply but also a very effective method of reducing various types of interference.

Often fitted in power leads, TV coax leads, speaker leads, telephone leads etc.

Fits cable approx 6-7mm diameter.

Clamp-0n Ferrite Kit
CK2
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Clamp-on Kit
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12 Different Size Filters

Similar in use to ferrite rings, but easier to use because they simply clamp over the cable. Ideal where cables have moulded plugs etc.

Very simply but also a very effective method of reducing various types of interference.

Often fitted in power leads, TV coax leads, speaker leads, telephone leads etc.

A kit with 12 different size filters - there's certain to be one to suit your needs.