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
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| Subject: | Re: noice filter (non aviation) |
[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
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| Subject: | noice filter Hijack |
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
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| Subject: | 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 . . .
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