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plevyakh
Joined: 10 Jan 2011
Posts: 39
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 Posted: Sat Jun 06, 2020 1:56 pm Post subject: Essential Bus Diode Voltage D-25 voltage drop of 2.3V? |
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Guys,
I'm using the standard AeroElectric Z-13/8 design with the E-Bus. I have Lighspeed dual electronic ignitions with 1 powered by main batt, and 2nd powered by the E-Bus.
I've noticed a signficant voltage drop from my Main Bus ((at) 14.3V), through the diode (D-25) and to my E-Bus ((at)12.0V).
I was expecting .5 to .7V drop across the D-25, but can't find a spec sheet for the Vf curve.
It became evident when my Low Volts warning started complaining.
What should I check to track down this increase in voltage drop?
Should I just swap in another D-25? I've been flying for 350hrs.
Is there another diode of choice now of a Diode I can use to swap in its place? Where can I purchase the AEC9001 Schottky Power Diode if that's a better option.
Thanks!
Howard
GlaStar
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Howard Plevyak
GlaStar / Cincinnati, Ohio |
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user9253
Joined: 28 Mar 2008
Posts: 1927
Location: Riley TWP Michigan
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| Posted: Sat Jun 06, 2020 3:57 pm Post subject: Re: Essential Bus Diode Voltage D-25 voltage drop of 2.3V? |
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If the diode voltage drop has been low for 350 hours, but recently increased,
then check for a bad connection between the main power bus and the E-Bus.
Schottky Diode part number: 747-DSS2X61-0045A
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Joe Gores |
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plevyakh
Joined: 10 Jan 2011
Posts: 39
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| Posted: Tue Jun 09, 2020 10:04 am Post subject: Re: Essential Bus Diode Voltage D-25 voltage drop of 2.3V? |
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Folks,
Thanks for the quick inputs. I will do some investigating on my Grand Rapids Technology EIS 4000 power and ground connections.
The EIS 4000 voltage is sensed by the power input and doesn't require a separate connection...but good power and ground wired connections to the instrument are a must.
Howard
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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Howard Plevyak
GlaStar / Cincinnati, Ohio |
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