AeroElectric-List Digest Archive

Wed 12/11/13


Total Messages Posted: 3



Today's Message Index:
----------------------
 
     1. 11:55 AM - Whelan capacitor substitute (Joe Dubner)
     2. 03:59 PM - Re: Whelan capacitor substitute (Robert L. Nuckolls, III)
     3. 07:54 PM - Re: Whelan capacitor substitute (Joe Dubner)
 
 
 


Message 1


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    Time: 11:55:55 AM PST US
    From: Joe Dubner <jdubner@yahoo.com>
    Subject: Whelan capacitor substitute
    Does anyone have firsthand experience replacing the Whelan 51-3361401-42 capacitor assembly in a strobe power supply? Specifically, can you give me a DigiKey, Mouser, Allied, etc. part number for a suitable photo flash capacitor substitute based on firsthand experience? The Whelan parts (and complete assemblies) are crazy-expensive. It's enough to make me change out the entire system to LEDs :-( But I'd really rather just repair the power supply and keep on flying. Thanks, Joe Independence, OR


    Message 2


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    Time: 03:59:17 PM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Re: Whelan capacitor substitute
    At 01:54 PM 12/11/2013, you wrote: > >Does anyone have firsthand experience replacing the Whelan >51-3361401-42 capacitor assembly in a strobe power >supply? Specifically, can you give me a DigiKey, Mouser, Allied, >etc. part number for a suitable photo flash capacitor substitute >based on firsthand experience? > >The Whelan parts (and complete assemblies) are >crazy-expensive. It's enough to make me change out the entire >system to LEDs :-( But I'd really rather just repair the power >supply and keep on flying. Consider patching "non flash rated" capacitors in. The worst that happens is that they don't last as long as the original parts. But as long as you can do the work yourself, the price differences might make the shorter service life an attractive alternative. Can you read capacity and voltage values off the parts? Bob . . .


    Message 3


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    Time: 07:54:38 PM PST US
    From: Joe Dubner <jdubner@yahoo.com>
    Subject: Re: Whelan capacitor substitute
    Robert L. Nuckolls, III wrote, On 12/11/2013 15:58: > <nuckolls.bob@aeroelectric.com> > > Consider patching "non flash rated" capacitors > in. The worst that happens is that they don't > last as long as the original parts. But as long > as you can do the work yourself, the price differences > might make the shorter service life an attractive > alternative. > > Can you read capacity and voltage values off > the parts? There are no markings other than a "Whelen" brand name and part number. But a web site selling replacement parts gave me a tip when it called them 400uF at 360WVDC. There are two of them in series and I measured 230VDC across each so that 360 WVDC rating seems reasonable. I "patched" in a couple of junkbox 470uF/450WVDC capacitors. Alas, the power supply still does not work. Upon close examination I now see some charred components and a swelled filter capacitor in the low voltage section. Rather than make the huge effort to reverse engineer and fix it, I think I'll buy a new Nova power supply for under $100 and move on. Thanks for the idea, Bob. I'm attaching a picture of the HV capacitors if for no other reason than to to satisfy peoples' curiosity. Best, Joe Independence, OR




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