Today's Message Index:
----------------------
1. 09:05 AM - Re: Does Anyone Recognize This Nav Light? (ronaldcox)
2. 11:50 AM - Re: Lead Acid Batteries (skywagon185guy)
3. 02:22 PM - Re: ADS-B and Transponder antenna... (andymeyer)
4. 03:39 PM - Re: Re: ADS-B and Transponder antenna... (Charlie England)
Message 1
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| Subject: | Re: Does Anyone Recognize This Nav Light? |
billhuntersemail(at)gmail wrote:
> Does anybody recognize this nav light assembly?
>
> It currently has incandescent light bulbs for the position lights however I would
really like to change the light bulbs to LED so I was wondering if anybody
has gone down this route before and would recommend what LED light bulbs to
use?
>
> Thanks,
>
> Bill Hunter
I bought these for my Glasair. They're brighter, and fit perfectly. Good for 10-30vdc.
But... Check the fixture/bulb first, and determine 1.) whether the current bulbs
have/need reflectors, and 2.) whether or not the pins that secure the bulbs
in the socket are offset or not. They can sell you both.
https://www.pilotlights.net/super-bright-3-watt-bay15s-bulb-position-light-navigation-light
They're nice and bright (appear subjectively a bit brighter than incandescent),
and as long as you make sure the polarity is right, they should work just fine.
(Officially, of course, for experimentals only.)
You can but several sets of these for the price of the new gold-plated Whelens.
Their customer service guy was very helpful when I had questions. His name is Robert
Cullinan, at sales@brittaproducts.com
In case the server stripes out the link, go to pilotlights (dot) net.
Ron
--------
Ron Cox
Glasair Super II F/T
Under Construction at C77 - Still just about to fly!
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=499037#499037
Attachments:
http://forums.matronics.com//files/ra7512_led_bulb__image_b_172.jpg
Message 2
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| Subject: | Re: Lead Acid Batteries |
Bill,
Maybe you already do this....
Put a small "Battery Maintainer" (like a schumacher) on the battery and set
it for 13.2 to 13.4 v, and leave it.
All should be good....
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On Thu, Oct 29, 2020 at 5:37 PM <billhuntersemail@gmail.com> wrote:
> Hi All,
>
> I hope everyone is doing well.
>
> I have a couple of questions about lead acid batteries
>
> First is the old tale that if you store a lead acid battery on the
> concrete floor it will discharge so keep it on a work bench or on wood
> blocksis that actually true or have I just been =9Csnipe h
unting=9D all of
> these years (decades)?
>
> Second question is about allowing a lead acid battery to discharge all th
e
> way down to zeroor if it had gotten severely discharged a few ti
mesit
> will no longer be serviceable. Is this accurate? If so why would a good
> battery become junk just because you =9Cleft the lights on=9D
and drained it
> down to zero?
>
> Third question is what is the difference between a =9Ccar battery
=9D and a
> =9Cmarine battery/ deep cycle battery=9D?
>
> Thanks everyone!!!
>
> Bill
>
Message 3
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| Subject: | Re: ADS-B and Transponder antenna... |
Charlie,
I saw the plots, but I don't know what I'm looking at... Am I way out on frequency,
other issues? Any thoughts tyet?
Andy
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=499039#499039
Message 4
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| Subject: | Re: ADS-B and Transponder antenna... |
On Fri, Oct 30, 2020 at 4:33 PM andymeyer <meyerkc135@gmail.com> wrote:
m
> >
>
> Charlie,
>
> I saw the plots, but I don't know what I'm looking at... Am I way out on
> frequency, other issues? Any thoughts tyet?
>
>
Unfortunately, I'm not sure what I'm seeing, either. I suspect that it has
little meaning when for a receive-only antenna, as indicated in the
conversation at this site:
https://ham.stackexchange.com/questions/382/what-is-the-relationship-betwee
n-swr-and-receive-performance#:~:text=Simplified%20answer%3A,between%20SW
R%20and%20receive%20performance.&text=SWR%20is%20a%20measure%20of,between
%20the%20transceiver%20and%20antenna.
*IF* I set up the nanoVNA correctly, the graphs indicate a worst case SWR
for the dipole of around 4, where the pointer is on the right side of the
screen. The J antenna SWR went 'off the chart' at minimal deviation above
the center frequency I used, which was the numeric midpoint between 978MHz
& 1090MHz. It should also be noted that getting my hand, or anything else,
anywhere near either antenna had significant effects on the SWR. While the
SWR looks awful, it probably has no real effect on the antennas'
performances when used only to receive a signal, as would be the case with
ADSB-in.
I'm afraid that to get any valid numbers on receive quality, we'd have to
find someone that can measure the actual signal strength on the two
frequencies of interest, when using these antennas.
As I said, I'll be happy to pass them on to someone else, if they can do a
better job in testing them.
Sorry that I haven't been able to produce more useful data.
Charlie
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