---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Mon 02/20/12: 6 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:54 AM - Re: Need Info on Vintage Landing Light (Eric M. Jones) 2. 08:38 AM - Anyone have an ACK A-30 encoder? (Janet Amtmann) 3. 09:15 AM - Re: Anyone have an ACK A-30 encoder? (Harley) 4. 09:39 AM - Re: Servo problem (Etienne Phillips) 5. 10:20 PM - Re: Servo problem (jonlaury) 6. 11:04 PM - Re: Re: Servo problem (Daniel Hooper) ________________________________ Message 1 _____________________________________ Time: 06:54:51 AM PST US Subject: AeroElectric-List: Re: Need Info on Vintage Landing Light From: "Eric M. Jones" Bob McC--Thanks, but if anyone can find stuff on the Interwebs, I can. So please don't "Google it for me". The guy you refer to--not only does he have none, but he will charge $$ to determine their value (Hah!) and will offer almost nothing. I'll shoot him an email anyway, as well as post on the Cloudster sites. But I have faith that somebody out there in Aeroelectricland knows what I need to know. -------- Eric M. Jones www.PerihelionDesign.com 113 Brentwood Drive Southbridge, MA 01550 (508) 764-2072 emjones@charter.net Read this topic online here: http://forums.matronics.com/viewtopic.php?p=366705#366705 ________________________________ Message 2 _____________________________________ Time: 08:38:00 AM PST US Subject: AeroElectric-List: Anyone have an ACK A-30 encoder? From: Janet Amtmann Does anyone have an ACK A-30-5 (or-9) encoder laying around that needs a new home? The NOS A-30-2 that I just installed in my RV-6 turns out to be defective and ACK will no longer service it. If I can relieve someone of one languishing on a shelf after an upgrade, I would appreciate it. Name your price. Jurgen Amtmann ________________________________ Message 3 _____________________________________ Time: 09:15:56 AM PST US From: Harley Subject: Re: AeroElectric-List: Anyone have an ACK A-30 encoder? Jurgen...I have a used one...not sure if it works or not...I was told that it does. If interested, let me know, I can send you pictures of it...I'll send it to you for the cost of shipping, and if it works in your application, pay me what it's worth to you... It's label doesn't specify whether it's -5, -9 or any dash number...any idea how to tell? Harley Dixon Long EZ N28EZ Hangar 29 (D38) Canandaigua, NY ----------------------------------------------------------------- > Does anyone have an ACK A-30-5 (or-9) encoder laying around > that needs a new home? The NOS A-30-2 that I just installed in > my RV-6 turns out to be defective and ACK will no longer > service it. If I can relieve someone of one languishing on a > shelf after an upgrade, I would appreciate it. Name your price. > > Jurgen Amtmann > > * > * ________________________________ Message 4 _____________________________________ Time: 09:39:21 AM PST US Subject: Re: AeroElectric-List: Servo problem From: Etienne Phillips 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. I also added a shield to the bottom of the servo using brass shimstock (I figured it was almost the same as copper foil, but somewhat more available - however not quite as solderable). The soldering in the photo doesn't appear to have flowed and stuck properly, but I gave it a good tug and it didn't come loose, so I just attributed it to the brass. The filter is inside the heatshrink, well supported from vibration. The servo is a Turnigy HV-767 (http://www.hobbyking.com /hobbyking/store/uh_viewItem.asp?idProduct=9983) - a 31kg.cm monster, but is still the standard size, which makes it small enough to fit comfortably in the elevator. The casing is aluminium, save for the plastic cap at the bottom where all the electronics sits. At $60 a pop, it's a fairly cheap alternative to the Ray Allen servo, and capable of being used for much more than just trim. The installation space is really tight, which meant that the filter had to sit outside the cavity, which limited my options for shielding hence the small strip over the bottom of the servo. After adding the filter and the shielding, the signal going into the servo is absolutely clean, without a shred of noise visible on the signal line. The servo doesn't even notice the radio transmission now, so I'm very relieved! This is what the controller up front looks like: There is also a stick-mounted rocker switch for easy trimming. The knob on the face allows you to save a position (such as the take-off trim), and return to it with a single click. My current project is the autopilot side of this, which reads data in from an Efis and does the required maths, sending the resulting trimmer position to the trim controller over an RS-485 link (this is why I went for such big servos). So far, altitude hold works, whilst bank and yaw are waiting to be flight tested. 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=85? With plugs and attachments it'll probably be unwieldy to install in such a small spot. Once again, thanks! Etienne ________________________________ Message 5 _____________________________________ Time: 10:20:28 PM PST US Subject: AeroElectric-List: Re: Servo problem From: "jonlaury" Bob, This sounds like a similar situation that I'm encountering with an EyeBeam that uses capacitance for on/off and for dimming. It's housed in a small ceiling mounted enclosure with my cabin speaker. Everytime I key the mike, the EB flashes uncontrollably and the on/off and dimming functions go inop. The only way to stop it is to pull the fuse. Wishful thinking had me try ferrite clamps over the speaker wires or the EB twisted pair shielded cable to no effect. But you knew that ;-). Would the solution you devised for Etienne be germane to solving my problem? Not sure how I would implement the copper shield as 1/2 of the EB is enclosed with the speaker and 1/2 is exposed to the cabin. Thanks, John I really like the EB and the small tidy console that houses the speaker so I hope that I don't have to give it up to use a less EM/RF sensitive source of light. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=366804#366804 ________________________________ Message 6 _____________________________________ Time: 11:04:00 PM PST US Subject: Re: AeroElectric-List: Re: Servo problem From: Daniel Hooper I'm sorry your ferrites didn't work. Did you ever try to see if keying the mic without the comm radio on prevents the issue? On Feb 21, 2012, at 12:16 AM, jonlaury wrote: > > Bob, > This sounds like a similar situation that I'm encountering with an EyeBeam that uses capacitance for on/off and for dimming. It's housed in a small ceiling mounted enclosure with my cabin speaker. > Everytime I key the mike, the EB flashes uncontrollably and the on/off and dimming functions go inop. The only way to stop it is to pull the fuse. > Wishful thinking had me try ferrite clamps over the speaker wires or the EB twisted pair shielded cable to no effect. But you knew that ;-). > > Would the solution you devised for Etienne be germane to solving my problem? > Not sure how I would implement the copper shield as 1/2 of the EB is enclosed with the speaker and 1/2 is exposed to the cabin. > > Thanks, > John > > I really like the EB and the small tidy console that houses the speaker so I hope that I don't have to give it up to use a less EM/RF sensitive source of light. > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=366804#366804 > > > > > > > > > > ------------------------------------------------------------------------------------- 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.