MGL Avionics - Clip on ferrites for radio noise suppression

Warning: Beware of ferrite suppressors sold in many electronic shops or mail order catalogues. Nearly all of them are made from Manganese-zinc or Iron powder and have little effect at VHF frequencies (100Mhz or higher).
MGL supply high quality German made Nickel-zinc (NiZn) ferrites optimised for operation at VHF airband frequencies and effective to over 1Ghz.

Clip-on ferrite with 8 mm internal diameter.

TIP...wind the offending wires twice or more times through the ferrite for improved suppression. And, always fit at the "noisy" end of the wire, close to the source of RF interference.

MGL Avionics Ferrite beads

Top quality nickel-zinc ferrite specially formulated to reduce interference in the 100 to 150 Mhz airband range.

For an excellent guide to using and fitting ferrites Click Here

High Value Capacitor

This 10 000uF electrolytic capacitor is an inexpensive and useful addition to your radio's power supply. It can significantly reduce, or even remove, noise signals such as ignition noise or rectifier/regulator noise.

Note: it is best to install as close as possible to the radio. The capacitor bridges the positive and negative power feed. The shorter terminal on the capacitor is -ve. Connect this to the negative power lead and the longer terminal to the +ve power lead. You can do this using terminal blocks, Scotchlocks, or solder.

In some instalations, connecting a high value capacitor across the +v and -v bus bars removes interference.