Today's Message Index:
----------------------
1. 03:21 AM - ELT antenna replacement (PGLong@aol.com)
2. 08:12 AM - Re: Transponder Converter from Serial to Gray code (Paul Messinger)
3. 08:26 AM - Re: OV protection for PM alternators (Ken)
4. 11:31 AM - Re: OV protection for PM alternators on juliet (Trampas)
5. 12:15 PM - Re: OV protection for PM alternators (David Carter)
6. 01:19 PM - Re: OV protection for PM alternators (David Carter)
7. 04:24 PM - Off Topic....Quo Vadis? (Eric M. Jones)
8. 05:58 PM - Re: ELT antenna replacement (Jim and Lucy Pollard)
9. 06:00 PM - Re: Off Topic....Quo Vadis? (Walter Tondu)
10. 06:13 PM - BNC Connector ()
11. 08:10 PM - Re: BNC Connector (Dan Checkoway)
12. 08:15 PM - Re: Wire Stripper (davercook)
Message 1
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| Subject: | ELT antenna replacement |
--> AeroElectric-List message posted by: PGLong@aol.com
OK, so I won't use my old STS Loran antenna on my ELT. Looking in catalogs,
I must have missed replacements to use on my AK-450 ELT. Can anyone recommend
a replacement for me to use and where I can purchase one? Thanks for the
help.
Pat Long
PGLong@aol.com
N120PL
RV4
Bay City, Michigan
3CM
Do Not Archive
Message 2
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| Subject: | Re: Transponder Converter from Serial to Gray code |
--> AeroElectric-List message posted by: "Paul Messinger" <paulm@olypen.com>
I also have a need for such a device.
Care to share details or sell a copy.
Paul
----- Original Message -----
From: "Joe Dubner" <jdubner@yahoo.com>
Subject: Re: AeroElectric-List: Transponder Converter from Serial to Gray
code
> --> AeroElectric-List message posted by: Joe Dubner <jdubner@yahoo.com>
>
> Trampas,
>
> Funny you should mention it -- I just built such a converter.
> http://home.velocitus.net/jdubner/EncoderPCB.jpg
>
> The outputs are TTL open collector (i.e. 7407 buffer). In fact, 7407s
> were used in an ancient TCI blind encoder I dissected a while back.
>
> --
> Joe
> Long-EZ 821RP
> Clarkston, WA
>
>
> --- Trampas <tstern@nc.rr.com> wrote:
>
> > --> AeroElectric-List message posted by: "Trampas" <tstern@nc.rr.com>
> >
> > I am thinking about making a simple converter which converts a serial
> > data
> > stream like from the Dynon to a gray code output. However I do not
> > have a
> > gray code encoder handy to figure out what the output voltages are,
> > does
> > anyone know?
> >
> > Regards,
> > Trampas
> > www.sterntech.com
>
>
> __________________________________
>
>
Message 3
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| Subject: | Re: OV protection for PM alternators |
on juliet
--> AeroElectric-List message posted by: Ken <klehman@albedo.net>
Hi David
The PM alternators have two wires coming out because they output AC to
the regulator. (The regulator contains a full wave rectifier to change
it to DC). The two wires go to a coil that is not connected to ground
inside the alternator.
Maybe it is overkill but I was presuming that a two pole relay would be
preferable to disconnect both AC wires. That would allow total isolation
even if one side of the alternator shorted to ground internally but that
is a different failure and probably quite unlikely compared to a
regulator failure.
Ken
David Carter wrote:
>--> AeroElectric-List message posted by: "David Carter"
<dcarter@datarecall.net>
>
>Ken,
>
>To do what you suggest, looks feasible to "transplant" the OVM relay,
>module, and CB system from its current position in Z-13 to be between one
>of the two wires showing between the SD-8 (John Deere in your case and
mine)
>and the VR. Seems like a fairly simple mod. Or, at least a fusible link
>ought to be in that output line between PM Alt & VR so the "always
spinning,
>always outputting" PM alternator would have no place to "output" to.
>
>A question: Why does it show two wires between the SD-8 and its VR? Will
>the John Deere also have two wires, or just one? I think you and I have
>Deere schematics but I can't lay my hand on mine (office is packed up for
>painting walls).
>
>David Carter
>
>----- Original Message -----
>From: "Ken" <klehman@albedo.net>
>To: <aeroelectric-list@matronics.com>
>Subject: AeroElectric-List: OV protection for PM alternators on juliet
>
>
>
>
>>--> AeroElectric-List message posted by: Ken <klehman@albedo.net>
>>
>>All the Z diagrams show the overvoltage disconnect relay wired to the
>>output of the voltage regulator on permanent magnet alternators. Given
>>that the most likely cause of an over voltage is probably a regulator
>>failure, wouldn't it make more sense to disconnect the input to the VR
>>just in case the VR decided to overheat and make smoke? This would
>>require a two pole relay to disconnect the AC input but that should not
>>be a major problem since I was going to use a "40" amp rated automotive
>>relay with my 20 amp John Deere VR and alternator. I'm assuming that the
>>fusible link (actually a circuit breaker on my machine) would disconnect
>>the VR from battery current in case the VR shorted - but that might be a
>>bad assumption???
>>Ken
>>
Message 4
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| Subject: | OV protection for PM alternators on juliet |
--> AeroElectric-List message posted by: "Trampas" <tstern@nc.rr.com>
Would it not be simpler to place some fuses in the wires from the alternator
if a short in the regulator is a concern to you?
Regards,
Trampas
www.sterntech.com
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Ken
Subject: Re: AeroElectric-List: OV protection for PM alternators on juliet
--> AeroElectric-List message posted by: Ken <klehman@albedo.net>
Hi David
The PM alternators have two wires coming out because they output AC to
the regulator. (The regulator contains a full wave rectifier to change
it to DC). The two wires go to a coil that is not connected to ground
inside the alternator.
Maybe it is overkill but I was presuming that a two pole relay would be
preferable to disconnect both AC wires. That would allow total isolation
even if one side of the alternator shorted to ground internally but that
is a different failure and probably quite unlikely compared to a
regulator failure.
Ken
David Carter wrote:
>--> AeroElectric-List message posted by: "David Carter"
<dcarter@datarecall.net>
>
>Ken,
>
>To do what you suggest, looks feasible to "transplant" the OVM relay,
>module, and CB system from its current position in Z-13 to be between one
>of the two wires showing between the SD-8 (John Deere in your case and
mine)
>and the VR. Seems like a fairly simple mod. Or, at least a fusible link
>ought to be in that output line between PM Alt & VR so the "always
spinning,
>always outputting" PM alternator would have no place to "output" to.
>
>A question: Why does it show two wires between the SD-8 and its VR? Will
>the John Deere also have two wires, or just one? I think you and I have
>Deere schematics but I can't lay my hand on mine (office is packed up for
>painting walls).
>
>David Carter
>
>----- Original Message -----
>From: "Ken" <klehman@albedo.net>
>To: <aeroelectric-list@matronics.com>
>Subject: AeroElectric-List: OV protection for PM alternators on juliet
>
>
>
>
>>--> AeroElectric-List message posted by: Ken <klehman@albedo.net>
>>
>>All the Z diagrams show the overvoltage disconnect relay wired to the
>>output of the voltage regulator on permanent magnet alternators. Given
>>that the most likely cause of an over voltage is probably a regulator
>>failure, wouldn't it make more sense to disconnect the input to the VR
>>just in case the VR decided to overheat and make smoke? This would
>>require a two pole relay to disconnect the AC input but that should not
>>be a major problem since I was going to use a "40" amp rated automotive
>>relay with my 20 amp John Deere VR and alternator. I'm assuming that the
>>fusible link (actually a circuit breaker on my machine) would disconnect
>>the VR from battery current in case the VR shorted - but that might be a
>>bad assumption???
>>Ken
>>
Message 5
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| Subject: | Re: OV protection for PM alternators |
--> AeroElectric-List message posted by: "David Carter" <dcarter@datarecall.net>
Ken,
I was up past midnight last night (this morning) modifying my Z-13.
Elimintated the starter contactor and removed jumper between top of solenoid
& side and ran wire from starter switch to side of solenoid. Eliminated PM
Alternator Sw (just grounded bottom of 5 amp CB associated with OVM). Then
I started working on the PM alternator circuitry - spent lot of time moving
the OVM stuff way off to right of diagram to make room to shift other stuff
left. Was planning to insert the OVM in between the PM Alt and the VR -
then realized - "That stuff coming out of the alternator is not regulated -
so why would I put an OVM in there!!??" My mental "what if'ing" and
"analysis" still lacks something - I hope it is ONLY lack of experience with
this electrical stuff and that I'll get better. I then clicked "Undo" a LOT
to return the OVM to original place in Z-13 and quit for the night.
Someone else suggested fusing the 2 AC wires between the PM alternator & its
VR - sounds OK to me as long as we don't introduce a corrosion, high
resistance, failure point. Solder in a "fusable link" or "fusable wire" or
connect in an ANL limiter or some such - I need to re-read the Aeroelectric
Connection about those things.
David
----- Original Message -----
From: "Ken" <klehman@albedo.net>
Subject: Re: AeroElectric-List: OV protection for PM alternators on juliet
> --> AeroElectric-List message posted by: Ken <klehman@albedo.net>
>
> Hi David
>
> The PM alternators have two wires coming out because they output AC to
> the regulator. (The regulator contains a full wave rectifier to change
> it to DC). The two wires go to a coil that is not connected to ground
> inside the alternator.
>
> Maybe it is overkill but I was presuming that a two pole relay would be
> preferable to disconnect both AC wires. That would allow total isolation
> even if one side of the alternator shorted to ground internally but that
> is a different failure and probably quite unlikely compared to a
> regulator failure.
>
> Ken
>
> David Carter wrote:
>
> >--> AeroElectric-List message posted by: "David Carter"
> <dcarter@datarecall.net>
> >
> >Ken,
> >
> >To do what you suggest, looks feasible to "transplant" the OVM relay,
> >module, and CB system from its current position in Z-13 to be between
one
> >of the two wires showing between the SD-8 (John Deere in your case and
> mine)
> >and the VR. Seems like a fairly simple mod. Or, at least a fusible
link
> >ought to be in that output line between PM Alt & VR so the "always
> spinning,
> >always outputting" PM alternator would have no place to "output" to.
> >
> >A question: Why does it show two wires between the SD-8 and its VR?
Will
> >the John Deere also have two wires, or just one? I think you and I have
> >Deere schematics but I can't lay my hand on mine (office is packed up
for
> >painting walls).
> >
> >David Carter
> >
> >----- Original Message -----
> >From: "Ken" <klehman@albedo.net>
> >To: <aeroelectric-list@matronics.com>
> >Subject: AeroElectric-List: OV protection for PM alternators on juliet
> >
> >
> >
> >
> >>--> AeroElectric-List message posted by: Ken <klehman@albedo.net>
> >>
> >>All the Z diagrams show the overvoltage disconnect relay wired to the
> >>output of the voltage regulator on permanent magnet alternators. Given
> >>that the most likely cause of an over voltage is probably a regulator
> >>failure, wouldn't it make more sense to disconnect the input to the VR
> >>just in case the VR decided to overheat and make smoke? This would
> >>require a two pole relay to disconnect the AC input but that should not
> >>be a major problem since I was going to use a "40" amp rated automotive
> >>relay with my 20 amp John Deere VR and alternator. I'm assuming that
the
> >>fusible link (actually a circuit breaker on my machine) would
disconnect
> >>the VR from battery current in case the VR shorted - but that might be
a
> >>bad assumption???
> >>Ken
> >>
>
>
Message 6
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| Subject: | Re: OV protection for PM alternators |
--> AeroElectric-List message posted by: "David Carter" <dcarter@datarecall.net>
Ken, forgot to mention in my summary of "simplification mods" to Z-13 that,
in the OVM wiring, I took the short jumper from red wire of OVM that
originally went left to bottom of main contacts and disconnected from bottom
of main contact and reattached to top of filter capacitor to right of OVM -
so coils to contactor get power when alternator starts turning on start-up
of engine. No alternator switch - always on unless OVM blows the CB or I
pull the CB to de-energize its contactor.
- If get electrical fire/smoke, I'll first turn off the battery switch.
Can also immediately pull the alternator cb - or wait to see if turning off
the battery switch is adequate. In either case, my electrically dependent
rotary engine will continue to get juice from an "always hot" battery bus,
with individual items on that bus having on-off switches.
David
----- Original Message -----
From: "David Carter" <dcarter@datarecall.net>
Subject: Re: AeroElectric-List: OV protection for PM alternators
> --> AeroElectric-List message posted by: "David Carter"
<dcarter@datarecall.net>
>
> Ken,
>
> I was up past midnight last night (this morning) modifying my Z-13.
> Elimintated the starter contactor and removed jumper between top of
solenoid
> & side and ran wire from starter switch to side of solenoid. Eliminated
PM
> Alternator Sw (just grounded bottom of 5 amp CB associated with OVM).
Then
> I started working on the PM alternator circuitry - spent lot of time
moving
> the OVM stuff way off to right of diagram to make room to shift other
stuff
> left. Was planning to insert the OVM in between the PM Alt and the VR -
> then realized - "That stuff coming out of the alternator is not
regulated -
> so why would I put an OVM in there!!??" My mental "what if'ing" and
> "analysis" still lacks something - I hope it is ONLY lack of experience
with
> this electrical stuff and that I'll get better. I then clicked "Undo" a
LOT
> to return the OVM to original place in Z-13 and quit for the night.
>
> Someone else suggested fusing the 2 AC wires between the PM alternator &
its
> VR - sounds OK to me as long as we don't introduce a corrosion, high
> resistance, failure point. Solder in a "fusable link" or "fusable wire"
or
> connect in an ANL limiter or some such - I need to re-read the
Aeroelectric
> Connection about those things.
>
> David
>
> ----- Original Message -----
> From: "Ken" <klehman@albedo.net>
> To: <aeroelectric-list@matronics.com>
> Subject: Re: AeroElectric-List: OV protection for PM alternators on juliet
>
>
> > --> AeroElectric-List message posted by: Ken <klehman@albedo.net>
> >
> > Hi David
> >
> > The PM alternators have two wires coming out because they output AC to
> > the regulator. (The regulator contains a full wave rectifier to change
> > it to DC). The two wires go to a coil that is not connected to ground
> > inside the alternator.
> >
> > Maybe it is overkill but I was presuming that a two pole relay would be
> > preferable to disconnect both AC wires. That would allow total isolation
> > even if one side of the alternator shorted to ground internally but that
> > is a different failure and probably quite unlikely compared to a
> > regulator failure.
> >
> > Ken
> >
> > David Carter wrote:
> >
> > >--> AeroElectric-List message posted by: "David Carter"
> > <dcarter@datarecall.net>
> > >
> > >Ken,
> > >
> > >To do what you suggest, looks feasible to "transplant" the OVM relay,
> > >module, and CB system from its current position in Z-13 to be between
> one
> > >of the two wires showing between the SD-8 (John Deere in your case and
> > mine)
> > >and the VR. Seems like a fairly simple mod. Or, at least a fusible
> link
> > >ought to be in that output line between PM Alt & VR so the "always
> > spinning,
> > >always outputting" PM alternator would have no place to "output" to.
> > >
> > >A question: Why does it show two wires between the SD-8 and its VR?
> Will
> > >the John Deere also have two wires, or just one? I think you and I
have
> > >Deere schematics but I can't lay my hand on mine (office is packed up
> for
> > >painting walls).
> > >
> > >David Carter
> > >
> > >----- Original Message -----
> > >From: "Ken" <klehman@albedo.net>
> > >To: <aeroelectric-list@matronics.com>
> > >Subject: AeroElectric-List: OV protection for PM alternators on juliet
> > >
> > >
> > >
> > >
> > >>--> AeroElectric-List message posted by: Ken <klehman@albedo.net>
> > >>
> > >>All the Z diagrams show the overvoltage disconnect relay wired to the
> > >>output of the voltage regulator on permanent magnet alternators.
Given
> > >>that the most likely cause of an over voltage is probably a regulator
> > >>failure, wouldn't it make more sense to disconnect the input to the
VR
> > >>just in case the VR decided to overheat and make smoke? This would
> > >>require a two pole relay to disconnect the AC input but that should
not
> > >>be a major problem since I was going to use a "40" amp rated
automotive
> > >>relay with my 20 amp John Deere VR and alternator. I'm assuming that
> the
> > >>fusible link (actually a circuit breaker on my machine) would
> disconnect
> > >>the VR from battery current in case the VR shorted - but that might
be
> a
> > >>bad assumption???
> > >>Ken
> > >>
> >
> >
>
>
Message 7
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| Subject: | Off Topic....Quo Vadis? |
--> AeroElectric-List message posted by: "Eric M. Jones" <emjones@charter.net>
Life's vicissitudes have marooned me in Massachusetts. (Wife left, cat went
feral, got fired).
New England is a good place to raise children, and it has good schools,
lobsters, oaks, proximity to NYC, and a short flight to Europe.
None of these really suit my needs anymore. I am 57 and single again; have
been running a small business on the internet, and can locate anywhere I
want. Financially I am okay.
I prefer the West. I have lived in Los Angeles. I love Tucson, but no longer
know anyone there. I have a sister in Portland Oregon, but they are moving
in a few years. I have a scattering of friends all over the place. I have
looked at Prescott, Tucson, LA, San Luis Obispo, Cambria, Eureka, Portland,
Seattle, Victoria BC. Small towns are better, with some access to big cities
if necessary.
I dont need much square footage. I need a place to build my Glastar and run
my little internet business. I would like a very friendly community as well
as proximity to an active homebuilder group.
QUESTION: Where should I go? Where is the ideal place and why?
Please contact me offline:
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge MA 01550-2705
Phone (508) 764-2072
Email: emjones@charter.net
Message 8
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| Subject: | Re: ELT antenna replacement |
--> AeroElectric-List message posted by: Jim and Lucy Pollard <jpollard@ciaccess.com>
At 08:44 AM 8/27/2004 -0400, you wrote:
>Funny you should post this. My AK450 antenna fell off on my first flight. I
>bet it happens more often then we think. Anybody else have this same thing
>happen too??
Mine fell apart while I was installing it. The wire droped out of the
bulkhead connector it is made from. It was just a piece of hose pushed
through a reamed out bulkhead connector. The wire with a soldered on
fitting for the coax was pressed through this piece of hose. I super
glued the thing back together but I thought it sure looked junky.
Another thing is this ELT came with the batterys in it and when
I opened the box the thing was armed and the transmition light
was showing that it was set off. There is not much use giving
you free batteries if they are going to be mostly dead when you
get the thing. I called the sar guys and they did not pick it up
in Trenton. Possibly because by the time it got into Canada from
California the batteries were so dead that it was not putting out
much signal. He said they have seen this a few times where the signal
is traveling down the freeway and into a city where tracking it down is very
hard to do.Maybe these boneheads should pay for the sar guys following
mail trucks because they are not smart enough to leave the batteries
out of the things when the mail them.
Jim Pollard
Merlin Ont
Message 9
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| Subject: | Re: Off Topic....Quo Vadis? |
--> AeroElectric-List message posted by: Walter Tondu <walter@tondu.com>
On 08/28 7:24, Eric M. Jones wrote:
> --> AeroElectric-List message posted by: "Eric M. Jones" <emjones@charter.net>
>
>
> Life's vicissitudes have marooned me in Massachusetts. (Wife left, cat went
> feral, got fired).
>
> New England is a good place to raise children, and it has good schools,
> lobsters, oaks, proximity to NYC, and a short flight to Europe.
>
> None of these really suit my needs anymore. I am 57 and single again; have
> been running a small business on the internet, and can locate anywhere I
> want. Financially I am okay.
>
> I prefer the West. I have lived in Los Angeles. I love Tucson, but no longer
> know anyone there. I have a sister in Portland Oregon, but they are moving
> in a few years. I have a scattering of friends all over the place. I have
> looked at Prescott, Tucson, LA, San Luis Obispo, Cambria, Eureka, Portland,
> Seattle, Victoria BC. Small towns are better, with some access to big cities
> if necessary.
>
> I dont need much square footage. I need a place to build my Glastar and run
> my little internet business. I would like a very friendly community as well
> as proximity to an active homebuilder group.
>
> QUESTION: Where should I go? Where is the ideal place and why?
North Dallas. Cheap living. Airparks all around. Friendly people.
Close proximity to the big city should you require that. Tons of RVs
too. Not sure about Glastars. See you there in a couple of years.
Oh, you have to like heat, thunderstorms and the occasional hail storm.
> Please contact me offline:
> Eric M. Jones
> www.PerihelionDesign.com
> 113 Brentwood Drive
> Southbridge MA 01550-2705
> Phone (508) 764-2072
> Email: emjones@charter.net
>
>
>
>
>
--
Walter Tondu
http://www.rv7-a.com
Message 10
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|
--> AeroElectric-List message posted by: <bakerocb@cox.net>
AeroElectric-List message previously posted by: "jcrain2@juno.com"
<<.skip..Also the mic key makes the wing leveler turn plus the fuel gauge pegs
out. Is there an extra shielded coax that works with the B and C connectors or
should I pull some off of an other larger coax to double shield?.....skip.>>
8/28/2004
Hello Bruce, That connector is called a BNC connector. BNC stands for Bayonet Neil
Councilman.
B=Bayonet for the way it connects together sort of like sticking a bayonet on
the end of a rifle.
N=Neil for the last name of one of the inventors.
C=Councilman for the last name of the other inventor.
There is also a connector called a TNC connector. It will be left as an exercise
for the student to determine what TNC stands for.
OC
PS: Both RG 142 and RG 400 are double shielded.
PPS: Extra credit goes to the first student who posts what the letters RG stand
for on the coax cable used with these connectors.
Message 11
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| Subject: | Re: BNC Connector |
--> AeroElectric-List message posted by: "Dan Checkoway" <dan@rvproject.com>
> PPS: Extra credit goes to the first student who posts what the letters RG
stand for on the coax cable used with these connectors.
Ooh, me, me, me, me! (hand raised)
RG=Radio Guide
(dogpile toolbar is cool)
do not archive
)_( Dan
----- Original Message -----
From: <bakerocb@cox.net>
Subject: AeroElectric-List: BNC Connector
> --> AeroElectric-List message posted by: <bakerocb@cox.net>
>
> AeroElectric-List message previously posted by: "jcrain2@juno.com"
>
> <<.skip..Also the mic key makes the wing leveler turn plus the fuel gauge
pegs
> out. Is there an extra shielded coax that works with the B and C
connectors or
> should I pull some off of an other larger coax to double
shield?.....skip.>>
>
> 8/28/2004
>
> Hello Bruce, That connector is called a BNC connector. BNC stands for
Bayonet Neil Councilman.
>
> B=Bayonet for the way it connects together sort of like sticking a
bayonet on the end of a rifle.
>
> N=Neil for the last name of one of the inventors.
>
> C=Councilman for the last name of the other inventor.
>
> There is also a connector called a TNC connector. It will be left as an
exercise for the student to determine what TNC stands for.
>
> OC
>
> PS: Both RG 142 and RG 400 are double shielded.
>
>
Message 12
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| Subject: | Re: Wire Stripper |
--> AeroElectric-List message posted by: "davercook" <davercook@prodigy.net>
Radio Shack has a new one out that works very well. It has no dies and no
holes. It automatically adjusts to the wire size. Cost about $19 I could
not get the one from B&C to work for me at all.
Dave Cook RV-6 Wiring
----- Original Message -----
From: "Steve Collins" <steveco@houston.rr.com>
Subject: AeroElectric-List: Wire Stripper
> --> AeroElectric-List message posted by: "Steve Collins"
<steveco@houston.rr.com>
>
> I need to get a wire stripper. Anyone found one that works well with
Tefzel
> wire (I understand a lot of common strippers don't work well on it, but I
> don't have personal experience)? With all the wiring I'll eventually be
> doing, I don't mind paying a little extra for a good tool.
>
>
> -Steve Collins
>
> -RV-7A, wings
>
>
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