Today's Message Index:
----------------------
1. 05:17 AM - Schotke diode (Gary Specketer)
2. 05:33 AM - Re: Schotke diode (Keith C. Borgstrom)
3. 05:53 AM - Re: Schotke diode (rnjcurtis)
4. 08:33 AM - Re: Schotke diode (Charlie England)
5. 09:16 AM - Re: Schotke diode (Gary)
6. 12:18 PM - Kill circuit issue - CDI (George Alexander)
7. 12:34 PM - Re: Kill circuit issue - CDI (Gary Specketer)
8. 01:44 PM - Re: Active VOR antenna ()
9. 01:57 PM - Re: Active VOR antenna (Robert L. Nuckolls, III)
10. 04:32 PM - Ideas on a "cost effective " ground power ? (Jeffrey W. Skiba)
11. 05:03 PM - Re: Ideas on a "cost effective " ground power ? (Gary Specketer)
12. 05:55 PM - Re: Ideas on a "cost effective " ground power ? (Jeff Luckey)
13. 06:00 PM - Re: Ideas on a "cost effective " ground power ? (Jeff Luckey)
14. 09:50 PM - Re: Ideas on a "cost effective " ground power ? (RV7ASask)
Message 1
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I was going to install my diode and decided to check it with my ohm meter. To
my surprise I get no continuity in any direction any combination of pins. What
is up?
Gary
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> Read this topic online here:
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> http://forums.matronics.com/viewtopic.php?p=441207#441207
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Message 2
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It could be that the batteries in you ohmmeter are too low to provide a high enough
voltage to forward-bias the diode. Put fresh batteries in and test it again.
Keith
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Gary Specketer
Sent: Friday, April 24, 2015 8:14 AM
Subject: AeroElectric-List: Schotke diode
--> <gspecketer@gmail.com>
I was going to install my diode and decided to check it with my ohm meter. To
my surprise I get no continuity in any direction any combination of pins. What
is up?
Gary
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> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=441207#441207
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Message 3
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Subject: | Re: Schotke diode |
Sent from: YOGA TABLET 10 HD+
Gary Specketer <gspecketer@gmail.com> wrote:
I was going to install my diode and decided to check it with my ohm meter. To
my surprise I get no continuity in any direction any combination of pins. What
is up?
Gary
Probably your meter! Many digital meters operate on such a small voltage, when
measuring resistance that they don't even have enough to break down the forward
junction of the diode, thus indicating a high resistance in both directions.
An analog meter is my preference for this task
you could use a 1K resistor in series with a battery and put this across the diode.
The voltage measured across the resistor will be high when the diode is
forward and low when reverse voltage is applied.
Roger
Message 4
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Subject: | Re: Schotke diode |
On 4/24/2015 7:49 AM, rnjcurtis wrote:
>
>
> Sent from: YOGA TABLET 10 HD+
>
> Gary Specketer <gspecketer@gmail.com> wrote:
>
>
>
> I was going to install my diode and decided to check it with my ohm meter. To
my surprise I get no continuity in any direction any combination of pins. What
is up?
>
> Gary
>
>
> Probably your meter! Many digital meters operate on such a small voltage, when
measuring resistance that they don't even have enough to break down the forward
junction of the diode, thus indicating a high resistance in both directions.
An analog meter is my preference for this task
>
> you could use a 1K resistor in series with a battery and put this across the
diode. The voltage measured across the resistor will be high when the diode is
forward and low when reverse voltage is applied.
>
> Roger
>
Or just put the digital meter in diode test mode (look for the diode
symbol on the selector switch).
Message 5
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Subject: | Re: Schotke diode |
Ah I wondered about that as it is a cheap harbor freight one and I think it has
a coin battery
> On Apr 24, 2015, at 8:31 AM, Keith C. Borgstrom <Keith.C.Borgstrom@dartmouth.edu>
wrote:
>
>
> It could be that the batteries in you ohmmeter are too low to provide a high
enough voltage to forward-bias the diode. Put fresh batteries in and test it again.
>
> Keith
>
> -----Original Message-----
> From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Gary Specketer
> Sent: Friday, April 24, 2015 8:14 AM
> To: aeroelectric-list@matronics.com
> Subject: AeroElectric-List: Schotke diode
>
> --> <gspecketer@gmail.com>
>
>
> I was going to install my diode and decided to check it with my ohm meter. To
my surprise I get no continuity in any direction any combination of pins. What
is up?
>
> Gary
>
>
>>
>>
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>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=441207#441207
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Message 6
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Subject: | Kill circuit issue - CDI |
Have a R503 w/DCDI. Engine runs great. Shut down, not so great. Go from Both
to Off, engine runs very rough. Return to Both, clears up. Initially suspected
(keyed) ignition switch. Clean contacts, used di-electric grease, worked
fine for a couple of cycles. Problem returned. Swapped out keyed ignition with
3 position toggles (Off-On-Momentary). Again OK for couple of cycles. Replaced
wiring from switches to connectors going to CDI Modules, leaving only the
original wires (Yellow/Black) from the CDI modules. Same issue.
Unless, I'm missing something and/or someone has a suggestion, it seems to point
to one of the modules. Will try the tests described in CPS's Part #58 (resistance
readings). Since the indicated reading between the Yellow/Black and anything
else is OPEN and I'm looking for Ground to shut down, not sure what this
test will show.
Don't look forward to replacing the CDI Modules.
--------
George Alexander
FS II R503 N709FS
http://www.oh2fly.net
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=441246#441246
Message 7
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Subject: | Re: Kill circuit issue - CDI |
One of the things high on my list would be poor connection. Either broken wire
or faulty crimp on connector.
Gary
> On Apr 24, 2015, at 3:16 PM, George Alexander <gtalexander@att.net> wrote:
>
>
> Have a R503 w/DCDI. Engine runs great. Shut down, not so great. Go from Both
to Off, engine runs very rough. Return to Both, clears up. Initially suspected
(keyed) ignition switch. Clean contacts, used di-electric grease, worked
fine for a couple of cycles. Problem returned. Swapped out keyed ignition
with 3 position toggles (Off-On-Momentary). Again OK for couple of cycles.
Replaced wiring from switches to connectors going to CDI Modules, leaving only
the original wires (Yellow/Black) from the CDI modules. Same issue.
> Unless, I'm missing something and/or someone has a suggestion, it seems to point
to one of the modules. Will try the tests described in CPS's Part #58 (resistance
readings). Since the indicated reading between the Yellow/Black and
anything else is OPEN and I'm looking for Ground to shut down, not sure what this
test will show.
> Don't look forward to replacing the CDI Modules.
>
> --------
> George Alexander
> FS II R503 N709FS
> http://www.oh2fly.net
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=441246#441246
>
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Message 8
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Subject: | Re: Active VOR antenna |
Bob,
Have you been able to assess the active VOR antenna? We=99re
about 30 days from first flight and really need a retrofit VOR antenna
solution for this bird as we discussed.
Thanks,
James
From: Robert L. Nuckolls, III
Sent: Wednesday, December 03, 2014 11:14 AM
Subject: AeroElectric-List: Toroid beads VOR antenna vs. Active VOR
antenna
I may mount one of this things on my roof and
see how it compares with monitor antennas I
have for listening to local city, police and
fire services.
I have one HF active antenna up there already.
http://tinyurl.com/ou2ezdy
The 'antenna' part of this critter is only a
few inches long. I don't have any other HF
optimized antennas up yet to compare it to . . .
but this 'lump' on the end of a piece of coax
hears 'lots of stuff'. Given that the 'stuff'
of which VOR is made (high power, line of sight)
it seems that our little experiment has a high
probability of success for replacing the legacy
dipoles and whiskers so favored by our TC
brothers.
Bob . . .
Message 9
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Subject: | Re: Active VOR antenna |
At 15:43 2015-04-24, you wrote:
>Bob,
>
>Have you been able to assess the active VOR
>antenna? Were about 30 days from first
>flight and really need a retrofit VOR antenna
>solution for this bird as we discussed.
>
>Thanks,
>James
It's in the que. I've got some boards to order
for another project next week, this board can
piggyback onto the 'scrap end' . . . thanks
for rattling my cage. All the parts are on hand.
Bob . . .
Message 10
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Subject: | Ideas on a "cost effective " ground power ? |
Hello all,
I have the circular type ground power connector on my Experimental aircraft
, and I am wondering if there is a cost effective Large supply unit (meanin
g lots of amps) to be able to run all the electrical whizzes in the aircraf
t while completing the build, Radios, multi-function nav screens, even the
landing lights etc.... (I have run the battery for this but it dies out aft
er about 40 minutes then I have to recharge it for several hours to work on
it again and the charge is not designed to power devices :( )
I have seen the typical aircraft ones (like below) but that seems way expen
sive..... all I need would be 14volts and I can change the cable end is the
re some Bargin out there that will turn on the computer based Devices in th
e aircraft while running of normal 110volt ac power from the hanger that I
am just missing?
[cid:image001.png@01D07EBC.DCFBDF30]
I guess another way to ask, is what's in the BOX ? and maybe I could build
one myself for Less ???
Thanks to all in advance
Jeff.
Message 11
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Subject: | Re: Ideas on a "cost effective " ground power ? |
Message 12
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Subject: | Re: Ideas on a "cost effective " ground power ? |
JeffS,
Have you tried a good old fashion battery charger (not a maintainer).=C2-
There are lots of chargers that are capable of putting out 10-15 amps whic
h should be plenty to keep the avionics & most accessories running.=C2- (
unless you have some need to run the high-current loads for really long per
iods of time?)
I have an ancient Sears charger that can put out about 15 amps all day long
& I use it to float loads when I'm bench testing.
A quick goole search found this: Sears.com
| =C2- |
| =C2- | =C2- | =C2- | =C2- | =C2- |
| Sears.comShopYourWay Kmart MyGofer Craftsman Kenmore PartsDirect Land's E
nd Sears Home Services Sears Outlet Sell on Sears See all Sears Store Locat
or Gift Cards Gift Registry Sears Credit Card Credit Offers |
| |
| View on www.sears.com | Preview by Yahoo |
| |
| =C2- |
Others on the list may have better recommendations for chargers,
-JeffL
On Friday, April 24, 2015 5:14 PM, Gary Specketer <gspecketer@gmail.co
m> wrote:
Message 13
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Subject: | Re: Ideas on a "cost effective " ground power ? |
a little cheaper deal here:
Schumacher 10/2 Amp Dual-Rate Manual Charger - Walmart.com
| =C2- |
| =C2- | | =C2- | =C2- | =C2- | =C2- | =C2- |
| Schumacher 10/2 Amp Dual-Rate Manual Charger - Walm...Buy Schumacher 10/2
Amp Dual-Rate Manual Charger at Walmart.com |
| |
| View on www.walmart.com | Preview by Yahoo |
| |
| =C2- |
On Friday, April 24, 2015 5:54 PM, Jeff Luckey <jluckey@pacbell.net> w
rote:
JeffS,
Have you tried a good old fashion battery charger (not a maintainer).=C2-
There are lots of chargers that are capable of putting out 10-15 amps whic
h should be plenty to keep the avionics & most accessories running.=C2- (
unless you have some need to run the high-current loads for really long per
iods of time?)
I have an ancient Sears charger that can put out about 15 amps all day long
& I use it to float loads when I'm bench testing.
A quick goole search found this: Sears.com
| =C2- |
| =C2- | =C2- | =C2- | =C2- | =C2- |
| Sears.comShopYourWay Kmart MyGofer Craftsman Kenmore PartsDirect Land's E
nd Sears Home Services Sears Outlet Sell on Sears See all Sears Store Locat
or Gift Cards Gift Registry Sears Credit Card Credit Offers |
| |
| View on www.sears.com | Preview by Yahoo |
| |
| =C2- |
Others on the list may have better recommendations for chargers,
-JeffL
On Friday, April 24, 2015 5:14 PM, Gary Specketer <gspecketer@gmail.co
m> wrote:
Message 14
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Subject: | Re: Ideas on a "cost effective " ground power ? |
http://www.eaavideo.org/video.aspx?v=1009394733001
Here is an EAA video on an alternate power supply. I installed it early in my construction
and used it throughout. I have used it often since I started flying
as well. I mounted the female end securely to the engine mount just inside the
oil access door so I don't have to remove the cowl to put power to the battery.
I have a Schumacher 10/2 charger similar to the one already suggested. It is quite
happy as long as I keep the power demand down.
Regards
David Lamb
RV7A
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=441276#441276
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