---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Sat 12/11/10: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:14 AM - Re: Re: Special type of charger? (Noel Loveys) 2. 05:45 PM - ISO Amp help () 3. 07:24 PM - Re: ISO Amp help (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 07:14:31 AM PST US From: "Noel Loveys" Subject: RE: AeroElectric-List: re: Special type of charger? Thanks Bob. I wasn't able to find anything on the web. Noel From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Richard Girard Sent: December 11, 2010 12:39 AM Subject: Re: AeroElectric-List: re: Special type of charger? AGM, Absorbent Glass Mat, and I remember seeing SLA, Starved Lead Acid, somewhere, too. Merry Christmas Bob, you're better than Santa Claus. Gifts all year long, and no reindeer poop on the roof.:-} Rick Girard On Fri, Dec 10, 2010 at 9:03 PM, Robert L. Nuckolls, III wrote: At 05:24 PM 12/10/2010, you wrote: Thanks Bob... Now I have to look up SVLA ;-) Sorry. Sealed Vented Lead-Acid, same as: Recombinant Gas (RG), starved electrolyte, and perhaps some names I've not discovered yet. They're often confused with and called "gell-cells" which they are not. They are also distinct from a class of "maintenance free" battery used in the automotive industry which is in fact a flooded and vented cell that you can't open up to replace water. But for the most part, any battery you pick up that weighs like a brick of lead encased in plastic is an SVLA/RG/SE battery. Bob . . . ========== om" target="_blank">www.aeroelectric.com ooks.com" target="_blank">www.buildersbooks.com et="_blank">www.homebuilthelp.com ="_blank">http://www.matronics.com/contribution le, List Admin. ========== -List" target="_blank">http://www.matronics.com/Navigator?AeroElectric-List ========== http://forums.matronics.com ========== -- Zulu Delta Kolb Mk IIIC 582 Gray head 4.00 C gearbox 3 blade WD Thanks, Homer GBYM It is not bigotry to be certain we are right; but it is bigotry to be unable to imagine how we might possibly have gone wrong. - G.K. Chesterton ________________________________ Message 2 _____________________________________ Time: 05:45:09 PM PST US From: Subject: AeroElectric-List: ISO Amp help Well, my first attempt at the Isolation amp has fizzled. I've pretty well resigned myself to starting over from scratch, but I want to make sure I don't repeat the same mistakes again. Here's what I get: A lot of distortion when the amp is powered up. With no power, I can hear the radio softly through the headset. Power on the amp, it's all distortion. I removed all inputs from the amp -- radio, intercom, nav, etc, same thing. All it needs is power. The d-sub connector is mounted on the solder side, per the illustrations, so power is pin 8. I can't find any spots where solder might have jumped terminals to create a short. A mistake I did find was that I didn't understand the polarity aspects of the capacitors, and some were installed backwards. Once I figured that out, I removed them and reinstalled them in the correct orientation, but there has been no change to the distortion. Either the damage had already been done, or that mistake wasn't the problem. Any input would be appreciated. One bill of materials question: Parts 6 & 7, A24794, do not appear anywhere in the plans aside from the bill of materials. Is that the solder-in ic socket that was replaced by the new machined-pin socket (revision H), or have I missed something else here? Brooks RV-7 details details ________________________________ Message 3 _____________________________________ Time: 07:24:41 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: ISO Amp help >One bill of materials question: Parts 6 & 7, A24794, do not appear >anywhere in the plans aside from the bill of materials. Is that the >solder-in ic socket that was replaced by the new machined-pin socket >(revision H), or have I missed something else here? No, those were optional and used under the amplifier chips. They weren't on the boards I photographed and as a result, did not get tied to the BOM tags. This kind of trouble shooting is very difficult to do by remote. If you're interested, mail the assembly to me. I can probably figure out what's going on in a few minutes. I'll share the process by which the discovery was made. Bob Nuckolls Bob 130 Medicine Lodge, KS 67104-0130 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.