X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 03 Jan 2011 14:21:55 -0500 Message-ID: X-Original-Return-Path: Received: from nm26-vm0.bullet.mail.sp2.yahoo.com ([98.139.91.230] verified) by logan.com (CommuniGate Pro SMTP 5.3.11) with SMTP id 4662503 for lml@lancaironline.net; Mon, 03 Jan 2011 11:50:06 -0500 Received-SPF: none receiver=logan.com; client-ip=98.139.91.230; envelope-from=n20087@yahoo.com Received: from [98.139.91.69] by nm26.bullet.mail.sp2.yahoo.com with NNFMP; 03 Jan 2011 16:49:30 -0000 Received: from [98.139.91.49] by tm9.bullet.mail.sp2.yahoo.com with NNFMP; 03 Jan 2011 16:49:30 -0000 Received: from [127.0.0.1] by omp1049.mail.sp2.yahoo.com with NNFMP; 03 Jan 2011 16:49:30 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 507934.51367.bm@omp1049.mail.sp2.yahoo.com Received: (qmail 65969 invoked by uid 60001); 3 Jan 2011 16:49:30 -0000 DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=Message-ID:X-YMail-OSG:Received:X-Mailer:Date:From:Subject:To:MIME-Version:Content-Type; b=TwfSrHRF9uvhBhd2oZzl8VEcwMfr9ENwl+Fq856y+rqiZxt6XmaComB7bU0UnYfQGQ5zSK5LcP2xw8Lv6TCc+U4FwPkEbaKQxejmv9UE8EyO3wGaNyWyrN7tH2o6Ot1FBcSqvtPsa+2MtyoFYYsZr9tS7jhw4/bBFjShZI0xliQ=; X-Original-Message-ID: <35937.65886.qm@web112719.mail.gq1.yahoo.com> X-YMail-OSG: YUHRFFoVM1kvxCDAwMnQ4hO3n_c8mzWv_Nu..LlZpNA.z5. 0_fDPkgf734rhPvP5UAw12LvWhRTj1V6fPB9ay1Z1zcNAp7N3KVhx5gH0xha S_YO5ysxol8lJBzCo4RE2n3GA32e_Ixuu8hK0.N4mdQU1SdBbeIixXdI2VGE h2UwRApdln7Us8altVZqhe6WBjxkmWWP1wseVAKTCpMH1ltyFcIscYZIPuaV qZ8NV78pBgEHyGcZuVesFoYdt5CWBS9atZwpFmiAUiF1AmGzhFuMdzDnTdTH 9VghdWpkBhrXIvnyU7CJ.Bx1Z1g7NLe9NAloRgYAClVupQ9TTxoiKLS_QUlB QMI4R3xPt.jXEuz1xoF71hCjxzJPE56nuRQx_rGRqJSR6xsIyk8NvMg-- Received: from [192.131.177.18] by web112719.mail.gq1.yahoo.com via HTTP; Mon, 03 Jan 2011 08:49:29 PST X-Mailer: YahooMailRC/553 YahooMailWebService/0.8.107.285259 X-Original-Date: Mon, 3 Jan 2011 08:49:29 -0800 (PST) From: TOM GARDINER Subject: S-TEC 55 RF interference X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="0-1529271567-1294073369=:65886" --0-1529271567-1294073369=:65886 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Folks,=0A=0AI have a S-TEC 55 autopilot issue that perhaps maybe others hav= e experienced in =0Athe past.=A0 Any help would be appreciated.=A0 =0A=0A= =0AThe problem is this:-=A0 =0A=0AWhen I have the AP setup in ALTitude hold= mode and I key my mic the pitch servo =0Agoes nuts and the aircraft climbs= for as long as I am transmitting.=A0 I am using =0Athe old blue plastic pr= essure S-TEC transducer which I know to have issues but =0AS-TEC are not of= ficially fessing up to this fact.=A0 Using foil and grounding =0Astraps I h= ave tried to isolate the transducer from RF as much as possible but =0Acann= ot entirely eliminate the pitching.=A0 Has anybody resolved this using prob= lem =0Aan alternative sensor, wiring configuration or special replacement d= eal with =0AS-TEC?=0A=0AThanks=0A=0ATom=0A=0A=0A --0-1529271567-1294073369=:65886 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable

Folks,

=0A

I have a S-TEC= 55 autopilot issue that perhaps maybe others have experienced in the past.= Any help would be appreciated.

=0A

=0AThe problem is this:-

=0A

When I hav= e the AP setup in ALTitude hold mode and I key my mic the pitch servo goes = nuts and the aircraft climbs for as long as I am transmitting. I am u= sing the old blue plastic pressure S-TEC transducer which I know to have is= sues but S-TEC are not officially fessing up to this fact. Using foil= and grounding straps I have tried to isolate the transducer from RF as muc= h as possible but cannot entirely eliminate the pitching. Has anybody= resolved this using problem an alternative sensor, wiring configuration or= special replacement deal with S-TEC?

=0A

Than= ks

=0A

Tom

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