---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Sun 03/25/07: 6 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:41 AM - test (Bob McCallum) 2. 06:50 AM - Re: test (BobsV35B@aol.com) 3. 05:12 PM - Capacitors for Whelen strobe power supply (Dennis Haverlah) 4. 06:47 PM - Good Deal on Power Guard (Speedy11@aol.com) 5. 07:40 PM - There is no 'ineptness' (Fergus Kyle) 6. 11:08 PM - Re: Capacitors for Whelen strobe power supply (James Foerster) ________________________________ Message 1 _____________________________________ Time: 06:41:58 AM PST US From: "Bob McCallum" Subject: AeroElectric-List: test do not archive this test. (No list mail for two days) Bob McC ________________________________ Message 2 _____________________________________ Time: 06:50:59 AM PST US From: BobsV35B@aol.com Subject: Re: AeroElectric-List: test In a message dated 3/25/2007 8:43:40 A.M. Central Daylight Time, robert.mccallum2@sympatico.ca writes: do not archive this test. (No list mail for two days) Bob McC Me Too!! I think it is just slow due to 'Lectric Bob being out of town. Do Not Archive. Happy Skies, Old Bob AKA Bob Siegfried Ancient Aviator Stearman N3977A Brookeridge Air Park LL22 Downers Grove, IL 60516 630 985-8503 ________________________________ Message 3 _____________________________________ Time: 05:12:45 PM PST US From: Dennis Haverlah Subject: AeroElectric-List: Capacitors for Whelen strobe power supply A friend gave me his Whelen strobe power supply. It was still cycling but not firing the strobes. Whelen will not repair it because they no longer support this unit. I checked the capacitors and found one of the two main capacitors has low resistance - partial short I believe. I'd like to try to make it work again for use in my RV 7A. The capacitors are 400UF - 300 VDC. They were manufactured by Sprague and have the # D77072 on the aluminum case. Also the numbers 7821L 19-03 are also on the case. Does anyone have a source I can purchase 2 from? I have looked on the web but don't know which capacitor design these are - aluminum, electroletic, etc. Thanks much, Dennis H. ________________________________ Message 4 _____________________________________ Time: 06:47:29 PM PST US From: Speedy11@aol.com Subject: AeroElectric-List: Good Deal on Power Guard If anyone is interested, I have a 12V Composite Design Power Guard (see it at _http://www.compositedesigninc.com/Power_Guard.htm_ (http://www.compositedesigninc.com/Power_Guard.htm) ) that I don't need and I'll sell it at 40% off retail with free shipping. If you want photos send me a note off the list at speedy11 at aol.com. It is new, unused and never installed. It doesn't fit my needs but maybe someone on this list can use it. Stan Sutterfield ________________________________ Message 5 _____________________________________ Time: 07:40:59 PM PST US From: "Fergus Kyle" Subject: AeroElectric-List: There is no 'ineptness' .......only ineptitude. Ferg Kyle ________________________________ Message 6 _____________________________________ Time: 11:08:37 PM PST US From: "James Foerster" Subject: AeroElectric-List: re: Capacitors for Whelen strobe power supply Dennis, Digikey catalog lists 12 different capacitors, 9 of which are in stock, which would work for you if they fit mechanically. These are all 350v at 390UF units. You can use anything rated 300 volts or better, and the 400UF is rather approximate, as the electrolytics are rated + and - 20%. It seems that 390 UF is now commonly used. Prices run from the $5 to $7 range. I will try to send you the results of the search on the Digikey site privately. Below are 390UF at 350v units: Diameter(mm) Length(mm) P11920-ND 25 40 P11921-ND 30 30 P11790-ND 25 45 P11791-ND 30 30 There are others, but mainly the ratings differ for service life at rated temperature. The first two are 3000 hr at 85 degrees C, the next two are 2000 hr at 105 degrees C. Search for these part numbers on the Digikey site, and they will lead you to all the information. Jim Foerster J400 wiring-veerry sloooly ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.