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bobnoffs
Joined: 04 Jul 2012
Posts: 132
Location: northern wi.
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 Posted: Sun May 05, 2013 3:48 pm Post subject: radio noise |
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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
[quote][b]
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bicyclop(at)pacbell.net
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| Posted: Sun May 05, 2013 4:19 pm Post subject: radio noise |
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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: [quote] 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
[b]
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skywagon
Joined: 11 Feb 2006
Posts: 184
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| Posted: Sun May 05, 2013 4:45 pm Post subject: radio noise |
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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...
[quote] ---
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bobnoffs
Joined: 04 Jul 2012
Posts: 132
Location: northern wi.
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| Posted: Mon May 06, 2013 1:34 am Post subject: radio noise |
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the radio is an icom i200 with an intercom setup.
bob noffs
On Sun, May 5, 2013 at 7:44 PM, David Lloyd <skywagon(at)charter.net (skywagon(at)charter.net)> wrote:
[quote] 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...
[quote] ---
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bobnoffs
Joined: 04 Jul 2012
Posts: 132
Location: northern wi.
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| Posted: Tue May 07, 2013 2:26 pm Post subject: radio noise |
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a few days ago i posted about my noise problem and a few said it sounded like squelch.i have an icom i200 and as far as i can tell there is no way to adjust squelch. anyone know anything about this radio? is there an internal adj.? bob noffs
[quote][b]
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klehman(at)albedo.net
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| Posted: Tue May 07, 2013 2:46 pm Post subject: radio noise |
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My i200 has a couple of adjustment screws on the circuit board if you
open the case. You want the one labelled "squelch". Mine also needed
tweaking for satisfactory operation.
Ken
| Quote: |
a few days ago i posted about my noise problem and a few said it sounded
like squelch.i have an icom i200 and as far as i can tell there is no way
to adjust squelch. anyone know anything about this radio? is there an
internal adj.? bob noffs
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user9253
Joined: 28 Mar 2008
Posts: 1938
Location: Riley TWP Michigan
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| Posted: Wed May 08, 2013 10:21 am Post subject: Re: radio noise |
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I agree with the others that it is a squelch problem.
On the top my Icom ic-A200 are 3 foil stickers each about 1/2" diameter which cover pot access holes. The A200 top cover is lightly embossed with hard to see labels for each of the 3 holes. The squelch is labeled SQL.
Joe
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