Ant CB
Member
Hi all,
I've been trying to troubleshoot a radio noise problem for a while and hit a dead end.
I have an IO-360 with 2 Slick 4300 series mags.
The radio is a handheld ICOM A6 with an external whip antenna. I've swapped the radio with another and all the radio components. The headset and mic plugs are just the ICOM ones that come with the radio.
When I select left only there is no problem. When I select right only I get significant ignition noise through the radio. Also when I'm on both I get it as well. Recently I replaced the left mag with a new one and the right one has just come back from a 500hr inspection. The problem was there before the mag was sent for the 500hr inspection and is still there after.
So far I've....
- Replaced both ignition harnesses with new ones
- Swapped the spark plugs around left to right (problem didn't follow the plugs)
- Replaced the p-leads with mil spec shielded wire and tried them with the shielding connected at both ends and only at the mag end
- Disconnected both p-leads all together
- Checked the condition of the harness and all the harness connections.
None of it seems to make a difference. The interference is so bad it breaks squelch with the squelch almost all the way to max.
I'm at a bit of a loss now. Could it be something wrong with the right mag? It is a Slick 4370 with about 400 hours on it.
I've been trying to troubleshoot a radio noise problem for a while and hit a dead end.
I have an IO-360 with 2 Slick 4300 series mags.
The radio is a handheld ICOM A6 with an external whip antenna. I've swapped the radio with another and all the radio components. The headset and mic plugs are just the ICOM ones that come with the radio.
When I select left only there is no problem. When I select right only I get significant ignition noise through the radio. Also when I'm on both I get it as well. Recently I replaced the left mag with a new one and the right one has just come back from a 500hr inspection. The problem was there before the mag was sent for the 500hr inspection and is still there after.
So far I've....
- Replaced both ignition harnesses with new ones
- Swapped the spark plugs around left to right (problem didn't follow the plugs)
- Replaced the p-leads with mil spec shielded wire and tried them with the shielding connected at both ends and only at the mag end
- Disconnected both p-leads all together
- Checked the condition of the harness and all the harness connections.
None of it seems to make a difference. The interference is so bad it breaks squelch with the squelch almost all the way to max.
I'm at a bit of a loss now. Could it be something wrong with the right mag? It is a Slick 4370 with about 400 hours on it.