Today's Message Index:
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1. 07:03 AM - Re: OVM-14 MkIII development (update) (merlewagner2)
2. 02:10 PM - One for the battery gurus: recovery from deep discharge (Alec Myers)
3. 03:12 PM - Re: Z-12N based architecture review request (user9253)
Message 1
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| Subject: | Re: OVM-14 MkIII development (update) |
nuckolls.bob(at)aeroelect wrote:
> I've published the ECB layout and assy data at
>
> https://tinyurl.com/ytdg9ehf (https://tinyurl.com/ytdg9ehf)
>
> Any any assistance in proofing the layout to the
> schematic would be appreciated. Will order boards
> late tonight.
>
> Got an order about ready to ship to Digikey for
> parts.
>
>
> We might get this project into smoke-test yet!
>
>
> Bob . . .
>
>
I looked at your layout and after finally figuring out the semantics it looks OK
initially. It was confusing until I understood the numbering scheme for components.
For me it usually takes about 3 iterations to figure out what I forgot. At 82 I
am finally recognizing a memory failure.
Merle
--------
KC1DNJ
General Radiotelephone
Commercial SEL
A & P
Building scale P51, rebuilding Tailwind W10
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=513174#513174
Message 2
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| Subject: | One for the battery gurus: recovery from deep discharge |
I have an SBS-J16 battery in an aircraft in which the battery master was left on
for two weeks (I know).
When found, the open circuit terminal voltage had dropped to 2.2 volts. A Dewalt
sophisticated battery charger didnt want to have anything to do with it, so
Ive now put it on charge with my bench power supply at 14.4V limited to 4 amps.
Initially the battery resistance was very high, and increasing - the voltage was
limited at 14.4V and the current dropped from 1.3 amps, to about 1.1 amps, within
a couple of minutes, and then started to ramp up, about 1mA per second.
After being on charge for an hour or so, the current it is accepting has risen
so the current limiting has kicked in, presently at 4 amps and the terminal voltage
has dropped to 14.3 V.
Im curious why the resistance was so high to start with, why it has now dropped
(to what seems normal charging behaviour to me) and also to know if this battery
has a chance of resurrection,. Its only a couple of years old, so if it will
soldier on after its mistreatment, I would be happy. What are my chances, do
you think?
Message 3
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| Subject: | Re: Z-12N based architecture review request |
The MZ-30L regulator output terminal 2 provides ground for an indicator light.
The light needs to get positive from a fuse connected to the aircraft main power
bus.
Notice that there is a "Pilot Enable Switch".
Every aircraft should have one of those, even aircraft without an electrical system.
:-)
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=513176#513176
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