Today's Message Index:
----------------------
1. 05:53 AM - Re: How do I prevent starter engaged LED from failing? (Robert L. Nuckolls, III)
2. 07:50 AM - Re: Re: Flap Motor lack of Oomph ()
3. 08:10 AM - Re: Flap Motor lack of Oomph (John Burnaby)
4. 08:24 AM - Re: Flap Motor lack of Oomph (Bruce Gray)
5. 08:28 AM - Re: AeroElectric-List Digest: 25 Msgs - 03/25/10 (Speedy11@aol.com)
6. 10:07 AM - Re: Looking for a used PC680 battery (John McMahon)
7. 10:50 AM - Re: S-Tec 30 GPSS internal fuse (Ralph E. Capen)
8. 11:02 AM - Re: S-Tec 30 GPSS internal fuse (Bruce Gray)
9. 11:21 AM - Re: S-Tec 30 GPSS internal fuse (Ralph E. Capen)
10. 12:28 PM - Re: Flap Motor lack of Oomph (jonlaury)
11. 02:53 PM - Re: Metal Jacket (Tray) for PC680 (icrashrc)
12. 07:54 PM - Re: Looking for a used PC680 battery (Kevin Klinefelter)
Message 1
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| Subject: | Re: How do I prevent starter engaged LED from failing? |
At 11:30 PM 3/25/2010, you wrote:
><rparigor@suffolk.lib.ny.us>
>
>I think I remember reading if an LED is used instead of a bulb for
>starter engagement indication, that you best add a diode to prevent
>the LED from getting hurt when power is removed from starter motor.
I've not explored the reverse bias energy signature
that would put an LED at risk . . . but like ALL
diodes, they do have limits. At some point, an increase
in reverse bias voltage applied to any semi-conductor
junction is marked by a threshold at which the
reverse bias "leakage" current rise sharply.
Watts = voltage x current.
The energy dissipated in the device can do only
one thing . . . heat things up. An EVERY device
has LIMITS beyond which the device is damaged.
>Where does the diode get placed, in series with the LED or in parallel?
Either would work . . . but parallel is preferred.
> If answer is in parallel where would the dropping resistor for LED
> get placed, between the legs of the protection diode, or outside?
Outside
>What would the specs be for a diode to protect my LED (reverse
>voltage rating and wattage)?
The smallest of all diodes would do fine. But
pick one that you can physically work with.
1N400x series is fine. If you want smaller,
1N4148 works too. But anything you can lay your
hands on would provide the necessary electrical
function.
>Could I use a Perihelion Snap-jack?
No, those are transient limiters that may rated
for a voltage higher than the LED can tolerate.
Bob . . .
Message 2
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| Subject: | Re: Flap Motor lack of Oomph |
I'll suggest that if the power supply is only capable of
delivering a maximum of 2 Amps at zero volts then it is not nearly robust
enough to properly run a flap motor. Try a fully charged battery or a power
supply capable of supporting a 5 or 10 Amp load at 12 Volts and see if your
test results are any different. I suspect that with an adequate supply your
motor will run normally.
Bob McC
> -----Original Message-----
> From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-
> server@matronics.com] On Behalf Of jonlaury
> Sent: Thursday=2C March 25=2C 2010 12:09 PM
> To: aeroelectric-list@matronics.com
> Subject: AeroElectric-List: Re: Flap Motor lack of
Oomph
>
"jonlaury" <jonlaury@impulse.net>
>
> Daniel=2C thanks for that. I'll check out the
motor/actuator with a charged battery
> today.
>
> Neal=2C the power supply brand escapes me right now=2C
but when the volt meter pegs=2C
> the amp meter shows approx 2 amps. I'll report back
with the PS brand tonight.
>
>
>
>
> Read this topic online here:
>
>
http://forums.matronics.com/viewtopic.php?p=291677#291677
>
>
>
>
>
>
>
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Message 3
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| Subject: | Re: Flap Motor lack of Oomph |
The Power Supply is an Astron RS-35M , 13.8v, 25 amps continuous @ 50%
duty cycle. American made in Irvine CA
Daniel was right. It's not a flap motor problem. The motor perked right
up when connected to my car battery.
Anyone have ideas re the power supply? There was an incident where the
positive and negative alligator clips contacted each other. But the 8
amp fuse of the PS didn't blow so I thought everything was OK.
J
Message 4
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| Subject: | Flap Motor lack of Oomph |
Don't rule out the motor until you read the amperage draw with a meter.
Bruce
www.Glasair.org
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of John
Burnaby
Sent: Friday, March 26, 2010 11:06 AM
Subject: Re: AeroElectric-List: Flap Motor lack of Oomph
The Power Supply is an Astron RS-35M , 13.8v, 25 amps continuous @ 50%
duty cycle. American made in Irvine CA
Daniel was right. It's not a flap motor problem. The motor perked right
up when connected to my car battery.
Anyone have ideas re the power supply? There was an incident where the
positive and negative alligator clips contacted each other. But the 8
amp fuse of the PS didn't blow so I thought everything was OK.
J
Message 5
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| Subject: | Re: AeroElectric-List Digest: 25 Msgs - 03/25/10 |
Charlie,
I bought one 2 days ago at Walmart for $20.95. It is labeled Shumacher
Speed Charger 1.6A - but look at the fine print and it reads 1562A.
Stan Sutterfield
Do not archive
Where are you guys finding the Shumacher 1562 battery chargers? I
looked at WalMart and they carry Shumacher battery chargers, but none
of them are labled 1562.
Message 6
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| Subject: | Re: Looking for a used PC680 battery |
I'm near KAUN Auburn, Ca. Let me know, thanks
John M.
do not archive
On Wed, Mar 24, 2010 at 10:11 PM, Kevin Klinefelter <kevann@gotsky.com>wrote:
> I'm in Bishop (KBIH)
> If Jared does not get back to me you can have it.What airport do you use?
>
> Kevin
> do not archive
>
>
> *
>
> *
>
>
--
John McMahon
Lancair Super ES, S/N 170, N9637M (Reserved)
Message 7
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| Subject: | Re: S-Tec 30 GPSS internal fuse |
I called their tech support...their guy told me it is a 1/2A Slo-Blo surface mount
fuse.
We then talked about what could cause this thing to go.....which led to my education
on how these units interact with each other.
The 10VDC that this fuse protects is used to excite the heading system - in my
case a Century NSD 1000 HSI.
Back to checking my wiring for shorts...didn't find any last time - but I'll still
check...55hrs without a blip.
It is listed as DO 178b though.......
Any more thoughts?
Thanks!
-----Original Message-----
>From: "Ralph E. Capen" <recapen@earthlink.net>
>Sent: Mar 25, 2010 10:47 AM
>To: aeroelectric-list@matronics.com
>Subject: Re: AeroElectric-List: S-Tec 30 GPSS internal fuse
>
>
>Good points Bob,
>
>This is a TSO'd device - part of an autopilot whose wiring is protected by a 5
amp fuse. I'll be taking a magnifying glass out to look at the markings on the
unit to determine its ratings. I agree with your questioning of the potential
lack of DO160 compliance from a common sense perspective.
>
>My initial research in to these types of fuses show that there are holders that
could be installed to make the fuse ultimately field-serviceable...albeit painfully
field serviceable. This would allow the retention of the fuse the manufacturer
deemed required for whatever their reasons.
>
>I'll post the info on the ratings that I discover.
>
>Ralph
>
>
>-----Original Message-----
>>From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
>>Sent: Mar 25, 2010 10:18 AM
>>To: aeroelectric-list@matronics.com
>>Subject: Re: AeroElectric-List: S-Tec 30 GPSS internal fuse
>>
>>
>>At 08:33 AM 3/25/2010, you wrote:
>><recapen@earthlink.net>
>>
>>Anyone else out there with S-Tec 30 and GPSS?
>>
>>Any of you having issues with the internal fuse in the GPSS module?
>>
>>Mine blew once during construction and was a real pain to ship back
>>and have S-Tec (whatever their name is now) solder in a new one. I
>>attributed that to using a power supply (even with a battery) to run
>>my panel during build testing. It has since blown again and I am
>>trying to figure out a way to not have to go through this PITA another time.
>>
>>More importantly, what is causing this little critter to pop in the
>>first place?
>>
>>The rest of the panel works fine with no other avionics issues. I
>>have gone back to my engine monitor to look for any recorded voltage
>>spikes....the highest I have is 14.0 which should be within the
>>normal operating range of the system (?). I have spike catching
>>diodes on my relays and have a process for powering up and powering
>>down stuff like this to prevent it from happening for other reasons.
>>
>> It's likely that the problem has nothing
>> to do with anything you are doing . . . or
>> not doing. The fact that some electro-whizzy
>> for airplanes includes and internal fuse is
>> itself reason to query the skills/design
>> goals of the manufacturer. I have on occasion
>> included fusible link type performance inside
>> a product . . . designed to prevent burning traces
>> on an ECB should some downstream failure put a
>> trace at risk. But real fuses (read fast acting
>> and not particularly robust) does give pause to
>> wonder why it's in there.
>>
>> If indeed the fuse is nuisance tripping because
>> of a REAL transient event on your system, then
>> I'm wondering if the electronics downstream of
>> that fuse were tailored to live with transient
>> events known to exist on the system (I.e. DO-160
>> style qualification).
>>
>> How much current does this electro-whizzy draw
>> in normal operations? Do you know what size the
>> fuse is?
>>
>> Bob . . .
>>
>>
>>
>>
>>
>
>
Message 8
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| Subject: | S-Tec 30 GPSS internal fuse |
I seem to recall that DO-178 covers software only.
DO-160 handles the electro-wizzies.
I could be wrong though.
Bruce
www.Glasair.org
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Ralph
E. Capen
Sent: Friday, March 26, 2010 1:48 PM
Subject: Re: AeroElectric-List: S-Tec 30 GPSS internal fuse
<recapen@earthlink.net>
I called their tech support...their guy told me it is a 1/2A Slo-Blo
surface mount fuse.
We then talked about what could cause this thing to go.....which led to
my education on how these units interact with each other.
The 10VDC that this fuse protects is used to excite the heading system -
in my case a Century NSD 1000 HSI.
Back to checking my wiring for shorts...didn't find any last time - but
I'll still check...55hrs without a blip.
It is listed as DO 178b though.......
Any more thoughts?
Thanks!
-----Original Message-----
>From: "Ralph E. Capen" <recapen@earthlink.net>
>Sent: Mar 25, 2010 10:47 AM
>To: aeroelectric-list@matronics.com
>Subject: Re: AeroElectric-List: S-Tec 30 GPSS internal fuse
>
<recapen@earthlink.net>
>
>Good points Bob,
>
>This is a TSO'd device - part of an autopilot whose wiring is protected
by a 5 amp fuse. I'll be taking a magnifying glass out to look at the
markings on the unit to determine its ratings. I agree with your
questioning of the potential lack of DO160 compliance from a common
sense perspective.
>
>My initial research in to these types of fuses show that there are
holders that could be installed to make the fuse ultimately
field-serviceable...albeit painfully field serviceable. This would
allow the retention of the fuse the manufacturer deemed required for
whatever their reasons.
>
>I'll post the info on the ratings that I discover.
>
>Ralph
>
>
>-----Original Message-----
>>From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
>>Sent: Mar 25, 2010 10:18 AM
>>To: aeroelectric-list@matronics.com
>>Subject: Re: AeroElectric-List: S-Tec 30 GPSS internal fuse
>>
<nuckolls.bob@aeroelectric.com>
>>
>>At 08:33 AM 3/25/2010, you wrote:
>><recapen@earthlink.net>
>>
>>Anyone else out there with S-Tec 30 and GPSS?
>>
>>Any of you having issues with the internal fuse in the GPSS module?
>>
>>Mine blew once during construction and was a real pain to ship back
>>and have S-Tec (whatever their name is now) solder in a new one. I
>>attributed that to using a power supply (even with a battery) to run
>>my panel during build testing. It has since blown again and I am
>>trying to figure out a way to not have to go through this PITA another
time.
>>
>>More importantly, what is causing this little critter to pop in the
>>first place?
>>
>>The rest of the panel works fine with no other avionics issues. I
>>have gone back to my engine monitor to look for any recorded voltage
>>spikes....the highest I have is 14.0 which should be within the
>>normal operating range of the system (?). I have spike catching
>>diodes on my relays and have a process for powering up and powering
>>down stuff like this to prevent it from happening for other reasons.
>>
>> It's likely that the problem has nothing
>> to do with anything you are doing . . . or
>> not doing. The fact that some electro-whizzy
>> for airplanes includes and internal fuse is
>> itself reason to query the skills/design
>> goals of the manufacturer. I have on occasion
>> included fusible link type performance inside
>> a product . . . designed to prevent burning traces
>> on an ECB should some downstream failure put a
>> trace at risk. But real fuses (read fast acting
>> and not particularly robust) does give pause to
>> wonder why it's in there.
>>
>> If indeed the fuse is nuisance tripping because
>> of a REAL transient event on your system, then
>> I'm wondering if the electronics downstream of
>> that fuse were tailored to live with transient
>> events known to exist on the system (I.e. DO-160
>> style qualification).
>>
>> How much current does this electro-whizzy draw
>> in normal operations? Do you know what size the
>> fuse is?
>>
>> Bob . . .
>>
>>
>>
>>
>>
>
>
Message 9
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| Subject: | S-Tec 30 GPSS internal fuse |
Would explain according to Bob the existence of the fuse......
-----Original Message-----
>From: Bruce Gray <bgray@glasair.org>
>Sent: Mar 26, 2010 2:01 PM
>To: aeroelectric-list@matronics.com
>Subject: RE: AeroElectric-List: S-Tec 30 GPSS internal fuse
>
>
>I seem to recall that DO-178 covers software only.
>
>DO-160 handles the electro-wizzies.
>
>I could be wrong though.
>
>Bruce
>www.Glasair.org
>
>-----Original Message-----
>From: owner-aeroelectric-list-server@matronics.com
>[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Ralph
>E. Capen
>Sent: Friday, March 26, 2010 1:48 PM
>To: aeroelectric-list@matronics.com
>Subject: Re: AeroElectric-List: S-Tec 30 GPSS internal fuse
>
><recapen@earthlink.net>
>
>I called their tech support...their guy told me it is a 1/2A Slo-Blo
>surface mount fuse.
>
>We then talked about what could cause this thing to go.....which led to
>my education on how these units interact with each other.
>
>The 10VDC that this fuse protects is used to excite the heading system -
>in my case a Century NSD 1000 HSI.
>
>Back to checking my wiring for shorts...didn't find any last time - but
>I'll still check...55hrs without a blip.
>
>It is listed as DO 178b though.......
>
>Any more thoughts?
>
>Thanks!
>
>
>-----Original Message-----
>>From: "Ralph E. Capen" <recapen@earthlink.net>
>>Sent: Mar 25, 2010 10:47 AM
>>To: aeroelectric-list@matronics.com
>>Subject: Re: AeroElectric-List: S-Tec 30 GPSS internal fuse
>>
><recapen@earthlink.net>
>>
>>Good points Bob,
>>
>>This is a TSO'd device - part of an autopilot whose wiring is protected
>by a 5 amp fuse. I'll be taking a magnifying glass out to look at the
>markings on the unit to determine its ratings. I agree with your
>questioning of the potential lack of DO160 compliance from a common
>sense perspective.
>>
>>My initial research in to these types of fuses show that there are
>holders that could be installed to make the fuse ultimately
>field-serviceable...albeit painfully field serviceable. This would
>allow the retention of the fuse the manufacturer deemed required for
>whatever their reasons.
>>
>>I'll post the info on the ratings that I discover.
>>
>>Ralph
>>
>>
>>-----Original Message-----
>>>From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
>>>Sent: Mar 25, 2010 10:18 AM
>>>To: aeroelectric-list@matronics.com
>>>Subject: Re: AeroElectric-List: S-Tec 30 GPSS internal fuse
>>>
><nuckolls.bob@aeroelectric.com>
>>>
>>>At 08:33 AM 3/25/2010, you wrote:
>>><recapen@earthlink.net>
>>>
>>>Anyone else out there with S-Tec 30 and GPSS?
>>>
>>>Any of you having issues with the internal fuse in the GPSS module?
>>>
>>>Mine blew once during construction and was a real pain to ship back
>>>and have S-Tec (whatever their name is now) solder in a new one. I
>>>attributed that to using a power supply (even with a battery) to run
>>>my panel during build testing. It has since blown again and I am
>>>trying to figure out a way to not have to go through this PITA another
>time.
>>>
>>>More importantly, what is causing this little critter to pop in the
>>>first place?
>>>
>>>The rest of the panel works fine with no other avionics issues. I
>>>have gone back to my engine monitor to look for any recorded voltage
>>>spikes....the highest I have is 14.0 which should be within the
>>>normal operating range of the system (?). I have spike catching
>>>diodes on my relays and have a process for powering up and powering
>>>down stuff like this to prevent it from happening for other reasons.
>>>
>>> It's likely that the problem has nothing
>>> to do with anything you are doing . . . or
>>> not doing. The fact that some electro-whizzy
>>> for airplanes includes and internal fuse is
>>> itself reason to query the skills/design
>>> goals of the manufacturer. I have on occasion
>>> included fusible link type performance inside
>>> a product . . . designed to prevent burning traces
>>> on an ECB should some downstream failure put a
>>> trace at risk. But real fuses (read fast acting
>>> and not particularly robust) does give pause to
>>> wonder why it's in there.
>>>
>>> If indeed the fuse is nuisance tripping because
>>> of a REAL transient event on your system, then
>>> I'm wondering if the electronics downstream of
>>> that fuse were tailored to live with transient
>>> events known to exist on the system (I.e. DO-160
>>> style qualification).
>>>
>>> How much current does this electro-whizzy draw
>>> in normal operations? Do you know what size the
>>> fuse is?
>>>
>>> Bob . . .
>>>
>>>
>>>
>>>
>>>
>>
>>
>>
>>
>>
>>
>>
>
>
Message 10
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| Subject: | Re: Flap Motor lack of Oomph |
Thanks Bruce. I'll try that today.
Talked to Astron and relayed the problem. The guy directed me to the circuit board
in the unit to replace one of the resistors with a higher value one.
It's all kind of wierd, because this thing has worked flawlessly in the past on
this same motor. The last time I used it, the outputs contacted, but the fuse
didn't blow and the unit still worked fine.
The literature on their website says that the unit is protected from this kind
of event.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=291842#291842
Message 11
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| Subject: | Re: Metal Jacket (Tray) for PC680 |
Sold!
--------
Scott
www.ill-EagleAviation.com
do not archive
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=291860#291860
Message 12
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| Subject: | Re: Looking for a used PC680 battery |
Jared had first dibs, I sent it to him...
Kevin
do dot archive
----- Original Message -----
From: John McMahon
To: aeroelectric-list@matronics.com
Sent: Friday, March 26, 2010 10:03 AM
Subject: Re: AeroElectric-List: Looking for a used PC680 battery
I'm near KAUN Auburn, Ca. Let me know, thanks
John M.
do not archive
On Wed, Mar 24, 2010 at 10:11 PM, Kevin Klinefelter
<kevann@gotsky.com> wrote:
I'm in Bishop (KBIH)
If Jared does not get back to me you can have it.What airport do you
use?
Kevin
do not archive
ist"
target="_blank">http://www.matronics.com/Navigator?AeroElectric-List
tp://forums.matronics.com
_blank">http://www.matronics.com/contribution
--
John McMahon
Lancair Super ES, S/N 170, N9637M (Reserved)
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