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Proper Ferrite choke diameter?
- Thread starter curlyjo
- Start date
There is no proper size. The more turns you can put thru the ferrite the better hence choose a size and fill it. Install it as close to the amp as possible as the speaker leads are acting as antennas and feeding the RF back into the amp where it is causing problems. Also try a 0.001 microfarad capacitor accross the speaker leads at the amp output.
Thanks for your reply. I have a few that snap on LMR 400 and some that snap on rg8. I was not experiencing speaker bleed over until I actually mounted the stereo speakers about 3 feet from my ICOM that is shown in my pic. So in my aplacation should in snap one on each antenna feed line on the back of the ICOM. Then wrap the speaker wire through a ferrite as close to I can get to the stereo speaker termial? I was thinking I was supposed to snap on a proper size ferrite on the stereo speaker wire close up to the speaker. Kind of like the molded on ferrites on computer cables.
Snapping a ferrite core on results in essentially a single turn and may help. try it and see. If not wind as many turns as you can around the open half and then snap it shut and try again. Again.....as close to the amp as you can get it.
Another trick that may be helpful is to use coax as the speaker lead(s), grounding that shield via the speaker jack in the radio. That 0.001 cap from center to the shield won't hurt either... nor those ferrites.
Use smaller coax, that LMR400 would be the pits as a speaker cable.
Use smaller coax, that LMR400 would be the pits as a speaker cable.