Today's Message Index:
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1. 08:05 AM - Intermittent duty contactor value ()
2. 08:18 AM - Re: Inverting the sense for warning tone controls/ audio mixer/ stereo music amp (Ernest Christley)
3. 11:17 AM - Re: Contactor Diodes (Dave VanLanen)
4. 01:54 PM - Re: Battery Capacity tester (Peter Laurence)
5. 05:47 PM - TruTrak ADI (Dennis Johnson)
6. 06:22 PM - Need a to-220 connector (Alan K. Adamson)
Message 1
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| Subject: | Intermittent duty contactor value |
Last week I bought a new "Made in the USA" intermittent duty contactor
from Lancair (Aerocraft Parts) for $2.50. I haven't shopped them lot,
but that seemed like a good value. Like everyone else they charge
shipping.
Message 2
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| Subject: | Re: Inverting the sense for warning tone controls/ |
audio mixer/ stereo music amp
Vernon Little wrote:
> Not sure what your situation is, but the only other complaint I had was when
> the user missed the dash "-" in the link.
> Try again, it looks like other users are connecting fine.
>
I think we were having some network problems yesterday. Later in the
day, there were several other sites that wouldn't load. Everything is
hunky-dory today.....Go figure.
Message 3
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| Subject: | Re: Contactor Diodes |
Thanks to Bob and Joe for the great explanations. I now understand clearly.
On to the next subject..
Dave
Do Not Archive
Message 4
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| Subject: | Re: Battery Capacity tester |
Re: Contactor DiodesBob,
Last Nov or so you were developing a battery capacity tester that would
utilize the e bus.
Status ?
Peter
Message 5
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Hi Jose,
I have a 2.25" TruTrak ADI as backup for my Chelton displays. My little
2.25" ADI is small and if I planned to use it as the primary attitude
source, I'd definitely want the full size 3.125" version.
One interesting feature is that if you connect it to a GPS, it will
display track (heading). I don't have a GPS connected to mine and can't
comment on that feature, except that I think it would be useful.
Before flying in IMC, I went up in clear weather with a safety pilot and
flew simulated instruments using only my backups: 2.25" instruments for
airspeed indicator, altimeter, and TruTrak ADI and a handheld Garmin 196
GPS. I flew straight and level, holding patterns, and non-precision
approaches.
It moves differently than a traditional mechanical attitude indicator,
which was a little distracting at first. But after a couple of minutes,
I adjusted to it and had no trouble flying the airplane with it as my
sole attitude reference. I'm confident that I could safely get the
airplane on the ground if my primary system failed.
I didn't practice recovery from unusual attitudes, but I expect that
wouldn't be a problem. If you exceed 45=B0 of bank, it displays a big
red arrow showing you which way to roll to get the wings level. If you
hold the nose up and bleed off airspeed, it flashes a low airspeed
warning to tell you to lower the nose and/or add power.
If I had more room on my panel, I'd like to have the full size ADI
instead of the small one. The small one works fine, it's just that a
larger display would be easier on my eyes. But I don't have the room,
so there's no point going down that road.
I'm very satisfied with the ADI and thinks it gives me good value. It
costs much less than a mechanical attitude indicator and might have a
longer life because of fewer moving parts. It's also lighter and easier
to install. Some people believe that if your primary instruments are
all electronic, like mine, your backup instruments should use a
different technology so that a single event is unlikely to take out both
the primary and backup instruments.
Good luck,
Dennis
Message 6
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| Subject: | Need a to-220 connector |
Bob, etc all.
I need to use to TO-220 LM7812C as a simple voltage regulator to take 24V to
12V for a Bob Archer Antenna switch.
No problems with the circuit, the current is small enough (<10ma) that I
don't need any additional parts or heatshrink. But I did want to make it
such that I could replace the lm7812 without having to solder and
unsolder.... Yes I could solder and connector the who regulator, but I
thot... Hmm, wonder if the legs of the to-220 part would fit in regular DB25
female pins and yep, they do, pretty much like the male pin would with just
a smidge of snugness (new word btw)...
If I use heatshrink to keep this all together, does anyone see any issue
with using these 3 pins as a simple "to-220 socket"? I'd crimp up the wires
to the 3 db25 pins, heatshrink them full length, then slide them on the
to-220 and heatshrink it as a unit to the 3 pin wires. Tuck it away and
hope I never have to deal with it, but if I do, cut some heatshrink, replace
the lm7812 and re-heatshrink.
Let me know your thots please...
Thanks,
Alan Adamson
Atlanta, GA
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