---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Wed 02/22/12: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:12 AM - Re: Servo problem (Robert L. Nuckolls, III) 2. 07:43 PM - Yippee! (Marty Mason) 3. 08:40 PM - Re: Yippee! (joe motis) 4. 08:59 PM - Re: Com and Nav Radio and Antenna Questions (Don) ________________________________ Message 1 _____________________________________ Time: 07:12:15 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Servo problem At 11:36 AM 2/20/2012, you wrote: Hi Bob Thanks for the advice, and the solution! I installed a Pi filter only on the signal line, but with components of 100pF and 10uH, as that's what was available. The power line didn't seem to be affected by the noise, so I decided to try just the signal line first, then add the power line filter if required. Good show. Thanks also for the offer of crafting a more elegant solution. Since the filter is so simple to fabricate, and seems to work in this really abusive environment, I wonder if it's even necessary? With plugs and attachments it'll probably be unwieldy to install in such a small spot. It wouldn't necessarily have any plugs, only attach pads for wires. I envision an ECB perhaps 0.7" x 1.0" that would accommodate surface mount components on one side leaving the other flat. Holes in the corners would let you solder-thru to attach the board directly to the outside copper foil on the actuator while simultaneously grounding the filter to the foil. Wires would come off each end. They would, of course, be strain relieved with adhesive or perhaps tied down with another layer of copper tape over the whole filter/wiring installation. Pretty small and low profile. In any case, it looks like your dragon has been held at bay. Bob . . . ________________________________ Message 2 _____________________________________ Time: 07:43:53 PM PST US From: Marty Mason Subject: AeroElectric-List: Yippee! I hope u like it http://www.markspeterson.com/message.php?Diane This really works! ________________________________ Message 3 _____________________________________ Time: 08:40:25 PM PST US Subject: Re: AeroElectric-List: Yippee! From: joe motis "Yippee" The five thousandth Lockheed P 38 built and painted in a stunning vermillion orange. Nothing Canadian about it Built right here in sunny SoCal. On Wed, Feb 22, 2012 at 7:39 PM, Marty Mason wrote: > captainmarty@bellsouth.net> > > > I hope u like it http://www.markspeterson.com/message.php?Diane This > really works! > > ________________________________ Message 4 _____________________________________ Time: 08:59:56 PM PST US From: "Don" Subject: RE: AeroElectric-List: Com and Nav Radio and Antenna Questions -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Robert L. Nuckolls, III Sent: Monday, February 06, 2012 6:21 PM Subject: RE: AeroElectric-List: Com and Nav Radio and Antenna Questions At 07:20 PM 2/5/2012, you wrote: This will not break the bank, will purchase one. It does not mention the ability to excite the feedline and antenna for setting up vor so U will need help in doing that. This is a self contained antenna analyzer. It features a variable frequency oscillator that provides a test signal source over a 2 to 170 Mhz range. There is a counter that displays the oscillator's present frequency. Finally, there is an array of detectors upon which a ratiometric analysis is conducted to deduce the resistive and reactive components of the antenna and display them. Instruction manual can be found here: http://www.mfjenterprises.com/pdffiles/MFJ-259B.pdf While not a laboratory grade instrument, it's a lot of bang for the buck. The wingtip antenna you talk about in the connection is a slightly modified Archer. Archer mounts them to the fiberglass wing tip and sandwiches it between the glass and the wing root for the ground. I am looking for the instructions that came with the unit and will send them to you as soon as I find them. Yeah, Bob was a little incensed when the folks at Van's published dimensional details on his first RV wingtip offerings (and I repeated them in the 'Connection). Bottom line is that the antenna is simply a gamma-matched monopole of which there are many variations on a theme. The now arcane 'sled runner' marker beacon antennas on the belly are a good example. Once you have an MFJ259 in hand, you can both trim overall length of the Archer design to desired center frequency, Shorter for higher center freq? If I need longer can I just rivet on an extension? you could also adjust the gamma-match and tuning capacitor for optimum performance too. Is this done by just increasing or decreasing the plate size where the center conductor attaches? Is this checked with the Percent match function on the MFJ259B? While this might be an intellectually satisfying exercise (Hams can get downright pedantic in their quest for the Holy-SWR), it would be hard to observe much difference in performance between an Archer cookie-cutter installation and one that has be tuned to technical Nirvana. I would like to be able to get one of these. To work in each wing tip for my two vors. I have an APRS (2meter Jpole in one wingtip that may make it impossible to get the Archer to work. Why a j-pole? That's an awfully big antenna for a line-of sight application. Why not the simple vertical whisker? I will ask the additional questions after I send you the Archer instructions. Got the data package. What's your question? Bob . . . ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.