X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sat, 07 May 2005 18:38:18 -0400 Message-ID: X-Original-Return-Path: Received: from imo-m17.mx.aol.com ([64.12.138.207] verified) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTP id 936095 for lml@lancaironline.net; Sat, 07 May 2005 17:36:45 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.12.138.207; envelope-from=Sky2high@aol.com Received: from Sky2high@aol.com by imo-m17.mx.aol.com (mail_out_v38_r1.7.) id q.13e.12cb21b1 (3310) for ; Sat, 7 May 2005 17:35:58 -0400 (EDT) From: Sky2high@aol.com X-Original-Message-ID: <13e.12cb21b1.2fae8ebe@aol.com> X-Original-Date: Sat, 7 May 2005 17:35:58 EDT Subject: Re: [LML] Radio noise X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1115501758" X-Mailer: 9.0 Security Edition for Windows sub 5000 -------------------------------1115501758 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 5/7/2005 4:16:11 P.M. Central Standard Time, ian.cr owe@sympatico.ca writes: Up to 175 knots my radios and audio panel function perfectly. At about 175 knots plus I start to get a lot of noise through the headset as if the mic has opened and let the aircraft noise into the system. I have tried playing with the squelch to no avail. Ian, I have the Terra audio panel and intercom and I know I have to change the intercom squelch after transitioning from the ground to the air because the increase in noise triggers the intercom. Something about taxiing at 1100 rpm versus 2600 rpm in a climb. Have you tried to just turn the intercom off? Since I often fly alone I usually have the intercom off - thus no adjustment is necessary. Is the "side tone" circuitry too sensitive? Of course, this should only happen on transmit since some part of the audio panel or radio produces the "side tone" so you can hear yourself as you transmit. There may be an adjustment (there is in the Garmin 430 radio part). If it were static related, you would probably hear it as static or squealing during such things as receiving a radio transmission........ I once had trouble with a noise canceling headset when wind (wind or heavy breathing) across the mike would overpower its circuitry. Of course I tried to use it in an open cockpit airplane. If you have such a headset, try turning off the noise canceling feature. Uh, wrap your mike in some of Dan Newland's sound killing stuff and you will probably have to yell at the tower controller - always a satisfying exercise (especially if you pretend to speak in a foreign tongue), but maybe the noise will go away. Have you often heard things that aren't there? Scott Krueger AKA Grayhawk Lancair N92EX IO320 SB 89/96 Aurora, IL (KARR) Fair and Balanced Opinions at No Charge! Metaphysical Monologues used at your own Risk. -------------------------------1115501758 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

In a message dated 5/7/2005 4:16:11 P.M. Central Standard Time,=20 ian.crowe@sympatico.ca writes:

<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>

Up to 175 knots my radios and audio panel function=20 perfectly. At about 175 knots plus I start to get a lot of noise thr= ough=20 the headset as if the mic has opened and let the aircraft noise into= the=20 system. I have tried playing with the squelch to no=20 avail.

Ian,

I have the Terra audio panel and intercom and I know I have to cha= nge=20 the intercom squelch after transitioning from the ground to the air because=20= the=20 increase in noise triggers the intercom. Something about taxiing at 11= 00=20 rpm versus 2600 rpm in a climb.

Have you tried to just turn the intercom off? Since I often fly a= lone=20 I usually have the intercom off - thus no adjustment is necessary.

Is the "side tone" circuitry too sensitive? Of course, this shoul= d=20 only happen on transmit since some part of the audio panel or radio produces= the=20 "side tone" so you can hear yourself as you transmit. There may be an=20 adjustment (there is in the Garmin 430 radio part).

If it were static related, you would probably hear it as static or=20 squealing during such things as receiving a radio=20 transmission........

I once had trouble with a noise canceling headset when wind (wind or he= avy=20 breathing) across the mike would overpower its circuitry. Of course I=20 tried to use it in an open cockpit airplane. If you have such a headse= t,=20 try turning off the noise canceling feature.

Uh, wrap your mike in some of Dan Newland's sound killing stuff and you= =20 will probably have to yell at the tower controller - always a satisfyin= g=20 exercise (especially if you pretend to speak in a foreign tongue), but maybe= the=20 noise will go away.

Have you often heard things that aren't there?=20

Scott Krueger=20 AKA Grayhawk
Lancair N92EX IO320 SB 89/96
Aurora, IL (KARR)

Fai= r=20 and Balanced Opinions at No Charge!
Metaphysical Monologues used at your=20= own=20 Risk.

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