---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Tue 03/26/19: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 08:58 AM - Re: noice filter (non aviation) (jonlaury) 2. 09:06 AM - noice filter Hijack (jonlaury) 3. 03:15 PM - Battery Tender charger/desulfator (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 08:58:52 AM PST US Subject: AeroElectric-List: Re: noice filter (non aviation) From: "jonlaury" [quote="nuckolls.bob(at)aeroelect"]At 06:30 AM 3/25/2019, you wrote: > > > > Okay, this is a WAG but and inexpensive > experiment. Without getting into an EMC > lab to 'sniff out' characteristics > of the evil triad (victim/propagation-path/ > victim), I'll guess that the remote receiver > in the filter is suffering conducted > interference from the lighting power > conditioners. Get one of these things > > https://tinyurl.com/yywphdh8 (https://tinyurl.com/yywphdh8) > > and install it on your filter. This > will convert the cord on the filter > into the same style as your computer. > The filter's attenuation characteristics > look like this > > [img]cid:7.1.0.9.0.20190325111420.05a3f320@aeroelectric.com.0[/img] > > Not really significant below 30 Khz > or so . . . so I'm hoping that your > lighting power conditioners operated > above that frequency. > > > Bob . . . My apologies if the subject change doesn't start a new thread. Would this be appropriate to address the problem in Post subject: Eye Beam Mini LED / RF interference Posted: Fri Feb 22, 2013 10:38 am The problem persists. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=488267#488267 ________________________________ Message 2 _____________________________________ Time: 09:06:39 AM PST US Subject: AeroElectric-List: noice filter Hijack From: "jonlaury" Joined: 06 Nov 2006 Posts: 328 [quote="nuckolls.bob(at)aeroelect"]At 06:30 AM 3/25/2019, you wrote: Quote: Bob N said: "Okay, this is a WAG but and inexpensive experiment. Without getting into an EMC lab to 'sniff out' characteristics of the evil triad (victim/propagation-path/ victim), I'll guess that the remote receiver in the filter is suffering conducted interference from the lighting power conditioners. Get one of these things https://tinyurl.com/yywphdh8 and install it on your filter. This will convert the cord on the filter into the same style as your computer. The filter's attenuation characteristics look like this [img]cid:7.1.0.9.0.20190325111420.05a3f320(at)aeroelectric.com.0[/img] Not really significant below 30 Khz or so . . . so I'm hoping that your lighting power conditioners operated above that frequency. Bob . . . " Would this be appropriate to address the problem in Post subject: Eye Beam Mini LED / RF interference Posted: Fri Feb 22, 2013 10:38 am The problem persists. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=488268#488268 ________________________________ Message 3 _____________________________________ Time: 03:15:43 PM PST US From: "Robert L. Nuckolls, III" Subject: AeroElectric-List: Battery Tender charger/desulfator The latest/greatest specimin in the stable of Battery Tender wall warts came in. I dug around in the shop and came up with an SVLA battery out of a portable air compressor that showed about 9v open circuit. When impressed with 14.2 volts, charge current stabilized at about 0.4 amps and would not go any lower. After being on charge for about 5 hours, I loaded it with 1A and the terminal voltage fell to about 11 volts. I.e. capacity of zero. I deduce that no cells are shorted. I hooked it to the new Battery Tender and invoked the maintenance mode. Here are the pertinent pages from the users manual. http://www.aeroelectric.com/articles/Batteries/Battery_Tender.pdf With a 'scope hooked to the battery we see this: Emacs! Yeah, it 'hammers' the battery with 25uS, 16v pulses probably 2A or better at an 8.2KHz rate. I saw no signals that suggested credence for the magic 3.26Mhz 'resonant frequency' of lead sulfate . . . which I think is bogus. How any physical mass of those dimensions might offer resonance at a wavelength of 97 meters begs some light- footed explanation. Nonetheless, the product does have a 'hammer' mode. The literature suggests that a badly sulfated battery may require weeks of rejuvenation . . . this test article is in pretty bad shape so we'll let 'er cook. BTW I see that BatteryMinder has come out with a 'desulfator' product. https://tinyurl.com/y4682h48 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.