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mprather(at)spro.net
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 Posted: Thu Jun 04, 2009 10:04 am Post subject: Kitfox IV - Jabiru 2200 - Icom IC-A210 Reciving noise |
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Hello -----,
I think it's important to identify whether the source of the noise is
ignition or alternator..
It looks like that engine has dual transistorized magnetos. Does your
installation allow for defeating one of those systems while the engine is
running? If so, you might notice a decrease in the noise by turning off
one or the other system while the engine is running.
Also, is it possible to disable the alternator while the engine is running?
After you find the source of the noise, you'll need to identify the method
of coupling that noise into the audio system. Conducted or radiated?
This might get you pointed in the right direction..
Regards,
Matt-
| Quote: |
<post(at)edgeperformance.no>
Hi,
I`m new to this forum, but I really hope someone can help me out.
I have just completed my Jabiru 2200 turbo rebuilding on my Kitfox IV.
Then I mounted my new Icom IC-A210 transceiver along with a new instrument
panel and new wiring.
I send crystal clear messages and receive perfectly on ground with engine
of. But as soon as I start my engine I get either ignition noise or
alternator noise. The sound adjusts in harmony with the throttle
settingrpm.
I have changed spark wires, used shielded tefzel wires on all avionics and
ignition kill switches. Used shielded wires on headset and microphone
jacks, ptt etc. I have also shielded the AC current wires from the
alternator or stator plate if you like. And still there is no sign to
reduce in headset noise.
This happens no matter if the transponder, GPS, instruments etc is ON or
OFF.
Also what i noticed is when transmitting a message I bearly hear myself in
the headset, though the intergrated intercom works well.
Hope anyone has experience either with the Icom IC-A210 and noise or the
jabiru engine in kitfox IV ?
Great full for all tips and help !
--------
Kitfox IV w\ Jabiru 2200 Turbo\Aerocarb
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EdgePerformance
Joined: 04 Jun 2009
Posts: 14
Location: Norway
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| Posted: Thu Jun 04, 2009 10:29 am Post subject: Re: Kitfox IV - Jabiru 2200 - Icom IC-A210 Reciving no |
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Hi,
Do you mean if i have one ignition switch for each coil ? I have tried to turn off one and one coil but that does`t reduce any noise.
I`ll try charging my battery full and take a quick flight with the alternator wires off.
At last I will try to add an extra battery and only connect the radio to it.
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Kitfox IV w\ Jabiru 2200 Turbo\Aerocarb |
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