Today's Message Index:
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1. 04:48 PM - radio noise (bob noffs)
2. 05:19 PM - Re: radio noise (Ed Holyoke)
3. 05:45 PM - Re: radio noise (David Lloyd)
Message 1
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i have about 65 hrs on my dakota hawk / 3300 jab. up until a couple hrs.
ago my radio had no unwanted noise. but no more.
while taxiing or in flight at rpm below about 2000 the radio is quiet. at
2800 rpm the static is constant. sounds like you are on an fm frequency
with no station. there is no whine or change in sound of the noise as rpm
increases or decreases. what does happen as rpm is dropped is that the
noise becomes more and more intermittant and less frequent until it
disappears.the noise disappears when i receive a transmission.
as i have a wood and cloth plane i have a forest of tabs for all my ground
wires. coming home from the airport i was thinking the rpm where the noise
starts is close to where the alternator kicks in. noise pitch is not
related to rpm though.
any ideas why this would just start and what may be the cause?
any ideas appreciated.
bob noffs
Message 2
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Sounds like you're breaking squelch. Try adjusting it up a bit.
Ed
On 5/5/2013 4:47 PM, bob noffs wrote:
> i have about 65 hrs on my dakota hawk / 3300 jab. up until a couple
> hrs. ago my radio had no unwanted noise. but no more.
> while taxiing or in flight at rpm below about 2000 the radio is
> quiet. at 2800 rpm the static is constant. sounds like you are on an
> fm frequency with no station. there is no whine or change in sound of
> the noise as rpm increases or decreases. what does happen as rpm is
> dropped is that the noise becomes more and more intermittant and less
> frequent until it disappears.the noise disappears when i receive a
> transmission.
> as i have a wood and cloth plane i have a forest of tabs for all my
> ground wires. coming home from the airport i was thinking the rpm
> where the noise starts is close to where the alternator kicks in.
> noise pitch is not related to rpm though.
> any ideas why this would just start and what may be the cause?
> any ideas appreciated.
> bob noffs
> *
>
>
> *
Message 3
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What kind of radio or navigator....??
....some of them have built-in staged squelch bands and one or more may
need sw adjustment if internal set...
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----- Original Message -----
From: Ed Holyoke
To: aeroelectric-list@matronics.com
Sent: Sunday, May 05, 2013 5:18 PM
Subject: Re: AeroElectric-List: radio noise
Sounds like you're breaking squelch. Try adjusting it up a bit.
Ed
On 5/5/2013 4:47 PM, bob noffs wrote:
i have about 65 hrs on my dakota hawk / 3300 jab. up until a couple
hrs. ago my radio had no unwanted noise. but no more.
while taxiing or in flight at rpm below about 2000 the radio is
quiet. at 2800 rpm the static is constant. sounds like you are on an fm
frequency with no station. there is no whine or change in sound of the
noise as rpm increases or decreases. what does happen as rpm is dropped
is that the noise becomes more and more intermittant and less frequent
until it disappears.the noise disappears when i receive a transmission.
as i have a wood and cloth plane i have a forest of tabs for all my
ground wires. coming home from the airport i was thinking the rpm where
the noise starts is close to where the alternator kicks in. noise pitch
is not related to rpm though.
any ideas why this would just start and what may be the cause?
any ideas appreciated.
bob noffs
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