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Hellsranger
Joined: 30 Oct 2017 Posts: 22 City/Region: Bellingham
State or Province: WA
C-Dory Year: 1991
C-Dory Model: 22 Cruiser
Vessel Name: Golden Heart
Photos: Golden Heart
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Posted: Sat Aug 18, 2018 1:05 pm Post subject: vhf radio interference |
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When my VHF is on and the engine (91 Johnson 70)I get a buzzy ticking interference. The speed of the ticking seems correspond to the RPM of the engine. Could it be bad plug wires? I'm hoping to get some input here as I'm basically not able to use the radio while under way, its just too annoying.
Thanks - Mac _________________ What's so funny bout
peace, love and understanding? |
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DW
Joined: 07 Sep 2017 Posts: 43 City/Region: Mount Vernon
State or Province: WA
C-Dory Year: 2004
C-Dory Model: 22 Cruiser
Vessel Name: Wicked Pissah
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Posted: Sat Aug 18, 2018 1:38 pm Post subject: |
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Considering the age of the wires, sounds like a good start to replace the wires first. If the issue continues, using Ferrites could help. You'll have to find someone smarter than I, but the basic concept is to add ferrites until the interference disappear. |
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ssobol
Joined: 27 Oct 2012 Posts: 3373 City/Region: SW Michigan
State or Province: MI
C-Dory Year: 2008
C-Dory Model: 22 Cruiser
Vessel Name: SoBELLE
Photos: SoBelle
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Posted: Sat Aug 18, 2018 4:16 pm Post subject: |
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It depends on whether the ticking is noise in the electrical system or is RF noise picked up by the antenna.
For electrical noise you can get an isolation transformer that goes on the radio power input. |
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srbaum
Joined: 30 Aug 2010 Posts: 877 City/Region: Portsmouth
State or Province: VA
C-Dory Year: 2007
C-Dory Model: 26 Venture
Vessel Name: Osprey
Photos: Osprey
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Barry Rietz
Joined: 21 Jun 2006 Posts: 409 City/Region: Sierra Vista
State or Province: AZ
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Posted: Sat Aug 18, 2018 10:08 pm Post subject: Radio Noise |
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You might try to find a set of "iridium" spark plugs and a new set of "resistor" type plug wires. (the hot rod shops have these items) _________________ Barry Rietz
N9DXC |
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