---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Sat 02/16/19: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:05 PM - Re: Battery disconnect with dual battery and trickle charger (Bill Watson) 2. 04:29 PM - MAC 3 LED Trim Indicator... (Matt Dralle) 3. 05:00 PM - Re: MAC 3 LED Trim Indicator... (Charlie England) 4. 05:10 PM - Re: PTT, snap action or not? (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 12:05:52 PM PST US Subject: Re: AeroElectric-List: Battery disconnect with dual battery and trickle charger From: Bill Watson On 2/9/2019 6:03 PM, Robert L. Nuckolls, III wrote: >> I was one of those people who ruined a number of O-680s with a >> Battery Tender branded maintainer. It was established that it was an >> earlier version than that being mentioned here, probably manufactured >> circa '85. > > Hmmmm . . . didn't know they went back > that far. Doubt that they were software > driven. I didn't start using them until > about 1998 . . . in fact, the top-off/ > maintainer curves I've published were > probably produced by one of my earliest > examples. > I may be mistaken on the date. When I started my build back in 2006, I dusted off all my old charging equipment from my glider flying days which ended in '95. When I started trying to diagnose my battery maintaining problems, with this site's help, in 2009 or so, it became clear that my old charging equipment was part of the problem so I threw it all out. I know some of it dated back to '85 but the Battery Tender branded unit might have been acquired later. So please disregard. >> I try to cross connect the 2 buses before landing at night but >> sometimes forget. When I forget, I try to top off the battery. >> Don't really know if it's a problem or not. > > Do you know what the drain is on > the battery . . . and for how long? No I don't. --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ________________________________ Message 2 _____________________________________ Time: 04:29:49 PM PST US From: Matt Dralle Subject: AeroElectric-List: MAC 3 LED Trim Indicator... Hello, A fellow homebuilder friend of mine has a old-style three-LED (Red|Green|Red) MAC Trim Position Indicator. The Green LED was burned out, and the wires were cut off too short. I told him I would try to replace the LED and lead wires. I got it apart without completely destroying it. But the internal wiring and polarity of the LEDs isn't that clear to me, nor is the actuation of it through a servo electronically. I'm not sure how to activate three LEDs with only three wires? (Or did there used to be four wires?) Does anyone have a PDF schematic of the 3-LED MAC Trim Indicator that you could email to me? Or better yet, does anyone have a spare or unused one of these they would like to sell me? Thank you, Matt Dralle Matt G Dralle | Matronics | 581 Jeannie Way | Livermore | CA | 94550 925-606-1001 V | 925-606-6281 F | dralle@matronics.com Email http://www.matronics.com/ WWW | Featuring Products For Aircraft ________________________________ Message 3 _____________________________________ Time: 05:00:49 PM PST US Subject: Re: AeroElectric-List: MAC 3 LED Trim Indicator... From: Charlie England On 2/16/2019 6:27 PM, Matt Dralle wrote: > > Hello, > > A fellow homebuilder friend of mine has a old-style three-LED > (Red|Green|Red) MAC Trim Position Indicator. The Green LED was burned > out, and the wires were cut off too short. > > I told him I would try to replace the LED and lead wires. I got it > apart without completely destroying it. But the internal wiring and > polarity of the LEDs isn't that clear to me, nor is the actuation of > it through a servo electronically. I'm not sure how to activate three > LEDs with only three wires? (Or did there used to be four wires?) > > Does anyone have a PDF schematic of the 3-LED MAC Trim Indicator that > you could email to me? > > Or better yet, does anyone have a spare or unused one of these they > would like to sell me? > > Thank you, > > Matt Dralle Is it accessible enough to clip-lead the LED in for testing? If so, just pick a direction. If it works, you're done. If it doesn't, reverse the leads. Assuming that the current limiting is done external to the LED itself, it won't matter if you insert it backward; it just won't light up. Charlie --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ________________________________ Message 4 _____________________________________ Time: 05:10:04 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: PTT, snap action or not? At 05:41 AM 2/14/2019, you wrote: >Thank you Bob and Charlie. The AeroElectric list never fails to deliver. > >So, it sounds like a PTT switch that clicks when >pushed (snap action) or not really doesn't >matter. I didn't think it did, but I wondered if >one was preferred over another.=C2 > >My current button on the (throw over) yoke >(Debonair) does not, but the copilot side on the >panel does. I think I prefer the click. > >Regards, >Jim really small tactile feedback, panel mount push buttons are not common catalog items. That one I showed you mounts in a 1/2" hole and probably wouldn't fit in a classic horn grip. This button has been around since I can remember . . . these were optional on the control horns on Cessnas and tied them into the PTT system via a drooping coil cord under the yolk. https://tinyurl.com/y2neb9nf Very small and easy to mount. 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