X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sun, 08 Feb 2009 14:25:45 -0500 Message-ID: X-Original-Return-Path: Received: from blu0-omc2-s16.blu0.hotmail.com ([65.55.111.91] verified) by logan.com (CommuniGate Pro SMTP 5.2.12) with ESMTP id 3482639 for lml@lancaironline.net; Sun, 08 Feb 2009 11:25:38 -0500 Received-SPF: pass receiver=logan.com; client-ip=65.55.111.91; envelope-from=hackmo15@hotmail.com Received: from BLU118-W50 ([65.55.111.73]) by blu0-omc2-s16.blu0.hotmail.com with Microsoft SMTPSVC(6.0.3790.3959); Sun, 8 Feb 2009 08:25:01 -0800 X-Original-Message-ID: X-Original-Return-Path: hackmo15@hotmail.com Content-Type: multipart/alternative; boundary="_e6564133-b146-4c3a-ae4a-0cb1b217e694_" X-Originating-IP: [208.100.150.139] From: jon hadlich X-Original-To: , LML Subject: antenna questions X-Original-Date: Sun, 8 Feb 2009 16:25:01 +0000 Importance: Normal MIME-Version: 1.0 X-OriginalArrivalTime: 08 Feb 2009 16:25:01.0458 (UTC) FILETIME=[CA908F20:01C98A09] --_e6564133-b146-4c3a-ae4a-0cb1b217e694_ Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable here's some of my observations on antenna installations Questions: - What antenna works best (given that it is too late to embed in the vertical stab)? The commant CI-122 bent whip always works if it's installed properly. I've = had good success with the archer dipole antennas=2C but their installation = is a bit more challenging.When installing the SA-006 Archer antenna in the = empenage=2C when it starts to bend so it's not perpendicular to the earth= =2C it becomes ineffective. That doesn't mean it won't work=2C it's just le= ss effective.=20 - What size ground plane do I use? The radius of the ground plane should be the same as the length of the ante= nna=2Cgenerally. There a whole lot of techno stuff about wave length that d= oesn't pertain to Lancairs because of our size limitations. I generally try= to make the ground plane as large as possible with out it starting up the = sides of the aircraft. Once it's no longer parallel with the base of the an= tenna=2C it's ineffective. The dipole antenna does not need a ground plane.= =20 - Do I ground the ground plane and=2C if so=2C where? The ground plane will be grounded through the coax. - Do I allow the antenna wire shield ground to electrically connect to the ground plane=2C or should they be insulated? (I can imagine grounding the ground plane to the battery in back=2C having it contact the antenna shield which grounds to the bus in front=2C and having that situation cause a loop which might have adverse consequences) Let the coax and the radio ground the ground plane. - How critical is it to use the newest kind of coax? The old coax is embedded down the side of the plane away from all signal wires=2C and if I replaced it I'd have to run the new one up the center with a lot of other wires... The rg-400 coax is better that the rg-58=2C but both work if properly insta= lled. It's best to separate the coax from other wires=2C both power and si= gnal. But=2C again=2C with our limited space compromises have to be made. I= f properly installed=2C rg-400 will usually shield the wire well enough to = run in close proximity with other wires. Jon=20 _________________________________________________________________ Windows Live=99: E-mail. Chat. Share. Get more ways to connect.=20 http://windowslive.com/explore?ocid=3DTXT_TAGLM_WL_t2_allup_explore_022009= --_e6564133-b146-4c3a-ae4a-0cb1b217e694_ Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable here's some of my observations on antenna installations



Ques= tions:

- What antenna works best (given that it is too late to embed in the vertical stab)?
The commant CI-122 bent whip always works if it's ins= talled properly. I've had good success with the archer dipole antennas=2C b= ut their installation is a bit more challenging.When installing the SA-006 = Archer antenna in the empenage=2C when it starts to bend so it's not perpen= dicular to the earth=2C it becomes ineffective. That doesn't mean it won't = work=2C it's just less effective.

- What size ground plane do I use?
The radius of the ground plane= should be the same as the length of the antenna=2Cgenerally. There a whole= lot of techno stuff about wave length that doesn't pertain to Lancairs bec= ause of our size limitations. I generally try to make the ground plane as l= arge as possible with out it starting up the sides of the aircraft. Once it= 's no longer parallel with the base of the antenna=2C it's ineffective. The= dipole antenna does not need a ground plane.


- Do I ground the ground plane and=2C if so=2C where?
The gro= und plane will be grounded through the coax.

- Do I allow the antenna wire shield ground to electrically connect to the ground plane=2C or should they be insulated? (I can imagine grounding the ground plane to the battery in back=2C having it contact the antenna shield which grounds to the bus in front=2C and having that situation cause a loop which might have adverse consequences)
Let the coax and = the radio ground the ground plane.

- How critical is it to use the newest kind of coax? =3B The old co= ax is embedded down the side of the plane away from all signal wires=2C and if I replaced it I'd have to run the new one up the center with a lot of other wires...
The rg-400 coax is better that the rg-58=2C but both w= ork if properly installed. It's best to separate the coax from other = =3B wires=2C both power and signal. But=2C again=2C with our limited space = compromises have to be made. If properly installed=2C rg-400 will usually s= hield the wire well enough to run in close proximity with other wires.
<= br>Jon



Windows Live=99: E-mail. Chat. Share. Ge= t more ways to connect. Check it out. = --_e6564133-b146-4c3a-ae4a-0cb1b217e694_--