X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 26 Jun 2008 21:50:45 -0400 Message-ID: X-Original-Return-Path: Received: from mail7.tpgi.com.au ([203.12.160.103] verified) by logan.com (CommuniGate Pro SMTP 5.2.4) with ESMTPS id 2991958 for lml@lancaironline.net; Thu, 26 Jun 2008 04:13:44 -0400 Received-SPF: pass receiver=logan.com; client-ip=203.12.160.103; envelope-from=domcrain@tpg.com.au X-TPG-Antivirus: Passed Received: from CRAIN (60-241-193-89.static.tpgi.com.au [60.241.193.89]) by mail7.tpgi.com.au (envelope-from domcrain@tpg.com.au) (8.14.3/8.14.3) with ESMTP id m5Q8Cu8J023336 for ; Thu, 26 Jun 2008 18:12:58 +1000 From: "Dominic V Crain" X-Original-To: "'Lancair Mailing List'" Subject: VHF Antenna X-Original-Date: Thu, 26 Jun 2008 18:12:22 +1000 X-Original-Message-ID: <001301c8d764$5d9d23e0$0201a8c0@CRAIN> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0014_01C8D7B8.2F4933E0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6838 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3198 Importance: Normal Thread-Index: AcjXZFwruX4E+05rR3+/oUf/lnvHIw== This is a multi-part message in MIME format. ------=_NextPart_000_0014_01C8D7B8.2F4933E0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable My #2 VHF has had issues for quite a while. The antenna has been the centre core Plus insulation of some coax. Positioned IAW the Lancair position for the Loran antenna - namely = curving around the fuselage behind the canopy. Testing with other antennae proved this antenna is the problem. I made a half wave dipole using RG400 coax lead-in to the dipole = splitter with the same principle of removing the outer shield outside the = splitter to form the antenna, and having each end finish in a 50 ohm dummy terminal block. All BNC connections. Testing with the new antenna following along the inside of the baggage compartment and the other section of the dipole following the original antenna position proved successful. For a permanent position, I am considering running the RG400 coax down = the tunnel to behind the rear bulkhead and curving the dipole around the = fuse at that point. Any critique of that plan? Any suggestions of attachment techniques and materials? Cheers Dom Crain VH-CZJ Ciao ------=_NextPart_000_0014_01C8D7B8.2F4933E0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

My #2 VHF has had issues for quite a = while.

The antenna has been the centre core Plus = insulation of some coax. Positioned IAW the Lancair position for the Loran antenna = – namely curving around the fuselage behind the canopy.

Testing with other antennae proved this = antenna is the problem.

I made a half wave dipole using RG400 coax = lead-in to the dipole splitter with the same principle of removing the outer shield outside the splitter to form the antenna, and having each end finish in = a 50 ohm dummy terminal block. All BNC connections.

Testing with the new antenna following along = the inside of the baggage compartment and the other section of the dipole = following the original antenna position proved successful.

For a permanent position, I am considering = running the RG400 coax down the tunnel to behind the rear bulkhead and curving the = dipole around the fuse at that point.

Any critique of that plan?

Any suggestions of attachment techniques and materials?

Cheers

Dom Crain

VH-CZJ

Ciao

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