AeroElectric-List Digest Archive

Thu 01/26/06


Total Messages Posted: 38



Today's Message Index:
----------------------
 
     1. 12:28 AM - 3 conductor AWG18 cable (James Foerster)
     2. 02:02 AM - Re: 3 conductor AWG18 cable (=?iso-8859-1?Q?Mich=E8le_Delsol?=)
     3. 03:06 AM - source for molex connectors (rd2@evenlink.com)
     4. 03:28 AM - Re: source for molex connectors (Bruce Gray)
     5. 04:35 AM - GPS antennas ()
     6. 04:59 AM - Re: EGT/CHT thermocouple cable (Robert L. Nuckolls, III)
     7. 05:10 AM - Bob Archer VOR antenna? (Matt Jurotich)
     8. 05:44 AM - source for molex connectors (rd2@evenlink.com)
     9. 06:23 AM - Re: EGT/CHT thermocouple cable (Ralph E. Capen)
    10. 06:48 AM - OV Module (Ron)
    11. 06:50 AM - Battery Charging Question - Fight or Switch? (Mark R Steitle)
    12. 07:06 AM - Re: EGT/CHT thermocouple cable (John Tvedte)
    13. 07:35 AM - Re: EGT/CHT thermocouple cable (Chuck Jensen)
    14. 07:46 AM - Re: 3 conductor AWG18 cable (Brian Lloyd)
    15. 08:14 AM - Re: EGT/CHT thermocouple cable (John Tvedte)
    16. 08:54 AM - Re: Bob Archer VOR antenna? (RV Builder (Michael Sausen))
    17. 09:40 AM - Re: Bob Archer VOR antenna? (Dan Checkoway)
    18. 09:54 AM - Re: 3 conductor AWG18 cable (Mickey Coggins)
    19. 10:28 AM - Why use starter contactor? (Bob Lee)
    20. 10:35 AM - Re: Bob Archer VOR antenna? (RV Builder (Michael Sausen))
    21. 10:37 AM - Re: EGT/CHT thermocouple cable (Robert L. Nuckolls, III)
    22. 10:50 AM - Re: EGT/CHT thermocouple cable (Ralph E. Capen)
    23. 11:04 AM - Re: Why use starter contactor? (sportav8r@aol.com)
    24. 11:09 AM - Re: OV Module (Robert L. Nuckolls, III)
    25. 11:10 AM - Re: Why use starter contactor? (Robert L. Nuckolls, III)
    26. 11:44 AM - Shunts (Mitchell Goodrich)
    27. 12:51 PM - Re: Why use starter contactor? (sportav8r@aol.com)
    28. 02:34 PM - Re: source for Molex connectors (Nancy Ghertner)
    29. 03:00 PM - Re: Why use starter contactor? (Robert L. Nuckolls, III)
    30. 03:03 PM - Re: 3 conductor AWG18 cable (Robert L. Nuckolls, III)
    31. 03:04 PM - Re: Shunts (Robert L. Nuckolls, III)
    32. 03:17 PM - Re: 3 conductor AWG18 cable (Bill Denton)
    33. 03:41 PM - Re: Why use starter contactor? (Ken)
    34. 03:50 PM - Re: Microswitch (Charlie Kuss)
    35. 03:53 PM - Re: 3 conductor AWG18 cable (Bruce Gray)
    36. 04:47 PM - Re: Battery Charging Question - Fight or Switch? (Brian Lloyd)
    37. 04:52 PM - Re: 3 conductor AWG18 cable (Brian Lloyd)
    38. 06:25 PM - Re: source for molex connectors (Bob C.)
 
 
 


Message 1


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    Time: 12:28:12 AM PST US
    From: "James Foerster" <jmfpublic@comcast.net>
    Subject: 3 conductor AWG18 cable
    --> AeroElectric-List message posted by: "James Foerster" <jmfpublic@comcast.net> Michele asked: I am looking for 3 conductor AWG18 cable to hook up the strobe lights. Steinair does not have it Does any one have a thought on a source for this? This was discussed one or two years ago. I don't recall the numbers, but the losses from using 22 gauge wire, which is much lighter, and available from Steinair, are quite acceptable. I'm using 22 gauge three conductor shield wire for my Whelen strobes, and expect no problem. I was very impressed at the weight of the shielded 18 gauge supplied by Whelen. The 22 gauge, needing a smaller shield, is much lighter. Search the archive if you truly believe that 18 gauge is needed. Jim Foerster, jmfpublic(at)comcast_dot_net Jabiru J400 wiring


    Message 2


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    Time: 02:02:31 AM PST US
    From: =?iso-8859-1?Q?Mich=E8le_Delsol?= <michele.delsol@microsigma.fr>
    Subject: 3 conductor AWG18 cable
    --> AeroElectric-List message posted by: =?iso-8859-1?Q?Mich=E8le_Delsol?= <michele.delsol@microsigma.fr> I should have been a little more specific - my question related to feeding the power supply and synching three strobes together. Since the current is not steady I prefer to shield the feed lines - 4 amps on 18awg should be OK. On the strobe light side, since we are dealing with 400V or so, amperage is very low and transient so 22awg should be OK. Michle -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of James Foerster Sent: jeudi 26 janvier 2006 09:25 Subject: AeroElectric-List: 3 conductor AWG18 cable --> AeroElectric-List message posted by: "James Foerster" <jmfpublic@comcast.net> Michele asked: I am looking for 3 conductor AWG18 cable to hook up the strobe lights. Steinair does not have it Does any one have a thought on a source for this? This was discussed one or two years ago. I don't recall the numbers, but the losses from using 22 gauge wire, which is much lighter, and available from Steinair, are quite acceptable. I'm using 22 gauge three conductor shield wire for my Whelen strobes, and expect no problem. I was very impressed at the weight of the shielded 18 gauge supplied by Whelen. The 22 gauge, needing a smaller shield, is much lighter. Search the archive if you truly believe that 18 gauge is needed. Jim Foerster, jmfpublic(at)comcast_dot_net Jabiru J400 wiring


    Message 3


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    Time: 03:06:08 AM PST US
    From: rd2@evenlink.com
    Subject: source for molex connectors
    --> AeroElectric-List message posted by: rd2@evenlink.com Can anyone point me to sources for molex connectors? I need several small ones male-female (2, 3, 4 pin) but neither R-Shack nor local auto stores seem to have what I need. Rumen


    Message 4


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    Time: 03:28:20 AM PST US
    From: "Bruce Gray" <Bruce@glasair.org>
    Subject: source for molex connectors
    --> AeroElectric-List message posted by: "Bruce Gray" <Bruce@glasair.org> http://www.steinair.com/ Bruce www.glasair.org -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of rd2@evenlink.com Sent: Thursday, January 26, 2006 6:02 AM Subject: AeroElectric-List: source for molex connectors --> AeroElectric-List message posted by: rd2@evenlink.com Can anyone point me to sources for molex connectors? I need several small ones male-female (2, 3, 4 pin) but neither R-Shack nor local auto stores seem to have what I need. Rumen


    Message 5


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    Time: 04:35:37 AM PST US
    From: <bakerocb@cox.net>
    Cc: <avionics-list@matronics.com>, <aeroelectric-list@matronics.com>
    Subject: GPS antennas
    --> AeroElectric-List message posted by: <bakerocb@cox.net> Responding to an AeroElectric-List message previously posted by: "Richard Sipp" <rsipp@earthlink.net> 1/26/2006 Hello Dick, My Garmin GNS 430 came with an antenna and installation instructions for the antenna that called for a large metal ground plane under the antenna. I called the Garmin tech people and protested. The technician said there was no real need for such a ground plane, but suggested that if I was going to put the antenna under a fiberglass upper cowling area near the engine that I mount it on a small metal shelf to help screen the antenna from electromagnetic junk that might be radiated from below. This I did, ensuring that the antenna had a view clear of any metal obstruction in the entire upper hemisphere. It has worked great. OC <<I know many folks have mounted their GPS antennas under fiberglass components like cowls. Most have reported no problem with reception. Has anyone with this configuration had a problem they could identify? Any reasons not to go this route? Any other considerations other than insuring unrestricted view of the sky and no metallic materials in the fiberglass.? Thanks Dick Sipp>>


    Message 6


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    Time: 04:59:46 AM PST US
    From: "Robert L. Nuckolls, III" <nuckollsr@cox.net>
    Subject: Re: EGT/CHT thermocouple cable
    --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckollsr@cox.net> At 09:45 PM 1/25/2006 -0500, you wrote: >--> AeroElectric-List message posted by: sportav8r@aol.com > >I didn't see that; thanks for pointing it out. > >Don't I recall from somewhere that it's okay to use, say, crimp-on molex >pins on the appropriate extension wires, as long as a certain symmetry of >junctions in the cable run is maintained? I think that's how i extended >by GRT probe wires ages ago, and it _seems_ to work okay. As long as your T/C wires are 20 or 22AWG, you can run them through ordinary D-sub connectors . . . SOLID MACHINED pins preferred. While the pins for a D-sub are NOT identical to the thermocouple wires being joined, they insert a pair of equal but opposing parasitic thermocouples into both leadwires. The parasitic thermocouples cancel each other out because they are in such close proximity to each other and have a common local temperature. Bob . . .


    Message 7


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    Time: 05:10:20 AM PST US
    From: Matt Jurotich <mjurotich@hst.nasa.gov>
    Subject: Bob Archer VOR antenna?
    --> AeroElectric-List message posted by: Matt Jurotich <mjurotich@hst.nasa.gov> Two questions Any significant difference in performance with the antenna installed parallel to the top of the wing vs the bottom? I know that crossing over the Bob Archer wingtip VOR antenna with the strobe and position light wires must be done in the Bob Archer defined way (he provides tie downs in the appropriate locations). But if the wires cross in front of the antenna by 6 to 12 inches is that OK? Thanks Matthew M. Jurotich e-mail mail to: <mjurotich@hst.nasa.gov> phone : 301-286-5919


    Message 8


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    Time: 05:44:12 AM PST US
    From: rd2@evenlink.com
    Subject: source for molex connectors
    --> AeroElectric-List message posted by: rd2@evenlink.com Thx rumen do not archive _____________________Original message __________________________ (received from Bruce Gray; Date: 06:29 AM 1/26/2006 -0500) --> AeroElectric-List message posted by: "Bruce Gray" <Bruce@glasair.org> http://www.steinair.com/ Bruce www.glasair.org


    Message 9


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    Time: 06:23:34 AM PST US
    From: "Ralph E. Capen" <recapen@earthlink.net>
    Subject: Re: EGT/CHT thermocouple cable
    --> AeroElectric-List message posted by: "Ralph E. Capen" <recapen@earthlink.net> >From an earlier post, I understood that this would not be applicable to a firewall situation as the temperatures are different on either side of the firewall. Somebody keep me honest here........ -----Original Message----- >From: "Robert L. Nuckolls, III" <nuckollsr@cox.net> >Sent: Jan 26, 2006 7:59 AM >To: aeroelectric-list@matronics.com >Subject: Re: AeroElectric-List: EGT/CHT thermocouple cable > >--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckollsr@cox.net> > >At 09:45 PM 1/25/2006 -0500, you wrote: > >>--> AeroElectric-List message posted by: sportav8r@aol.com >> >>I didn't see that; thanks for pointing it out. >> >>Don't I recall from somewhere that it's okay to use, say, crimp-on molex >>pins on the appropriate extension wires, as long as a certain symmetry of >>junctions in the cable run is maintained? I think that's how i extended >>by GRT probe wires ages ago, and it _seems_ to work okay. > > As long as your T/C wires are 20 or 22AWG, you can run them through > ordinary D-sub connectors . . . SOLID MACHINED pins preferred. While > the pins for a D-sub are NOT identical to the thermocouple wires being > joined, they insert a pair of equal but opposing parasitic thermocouples > into both leadwires. The parasitic thermocouples cancel each other out > because they are in such close proximity to each other and have a common > local temperature. > > Bob . . . > > > > > > >


    Message 10


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    Time: 06:48:18 AM PST US
    From: "Ron" <rondefly@rtriano.com>
    Subject: OV Module
    --> AeroElectric-List message posted by: "Ron" <rondefly@rtriano.com> I could not get the listed resistors at Digikey and went to Frys, was not able to get the 1% but was able to get some 2% and 5 %, also on the BC1.62KZCT could only get a 1.6. I am having problems getting up to the voltage stated in the troubleshooting area. Is it the tolerance of the resistors or that 1.62 one maybe? I have checked all my solder joints and went completely through the troubleshooting guide Bob has with the parts list. Any help is appreciated. Ron Triano


    Message 11


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    Time: 06:50:20 AM PST US
    Subject: Battery Charging Question - Fight or Switch?
    From: "Mark R Steitle" <mark.steitle@austin.utexas.edu>
    --> AeroElectric-List message posted by: "Mark R Steitle" <mark.steitle@austin.utexas.edu> Bob, Following an earlier Aero-Electric discussion on battery chargers, I purchased a Schumacher SC-1200A charger to use in maintaining the Odyssey PC-680 batteries in my airplane. The charger has settings for flooded-cell, deep-cycle, and AGM/Gel-cell batteries. I've been using the AGM/Gel-cell setting. I read today in the document titled Charging Odyssey Drycell Batteries (www.odysseybatteries.com/charging.htm) where it states, "In general, do not use either the gel cell or maintenance free setting, if provided on your charger. Choose the deep cycle option, should there be one on your charger." So, now I'm confused as to which to use. My PC-680 doesn't appear to have been harmed by charging on the AGM/Gel-cell setting, but now I'm confused. Should I switch to the deep-cycle setting, or continue as before? Mark Lancari ES Austin, TX


    Message 12


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    Time: 07:06:10 AM PST US
    Subject: Re: EGT/CHT thermocouple cable
    From: "John Tvedte" <JohnT@comp-sol.com>
    --> AeroElectric-List message posted by: "John Tvedte" <JohnT@comp-sol.com> Qm9iLA0KIA0KVGhlIGNhYmxlIHJlZmVyZW5jZWQgaXMgbm90IFRlZnplbCBpbnN1bGF0ZWQuICBU aGUgaGF2ZSBUZWZsb24gUEZBIChQZXJmbHVvcm9hbGtveHkpICBvciBGRVAgKEZsdW9yaW5hdGVk IEV0aHlsZW5lIFByb3B5bGVuZSkuICBUZWZ6ZWwgaXMgRVRGRSAoRXRoeWxuZSBUcmlGbHVvcm9F dGh5bGVuZSkuDQogDQpBbHNvIC0gbm90ZSB0aGF0IHRoZSBvbmx5IHN0cmFuZGVkIHdpcmUgbGlz dGVkIGluIHRoaXMgcmVmZXJlbmNlIGlzIFBWQy4NCiANCkkgY2FsbGVkIE9tZWdhIGFuZCB0YWxr ZWQgd2l0aCBKb2huIEJhY2ggKEkgdGhpbmsgaGUgaXMgaW4gcHJlLXNhbGVzIHN1cHBvcnQpIGFu ZCBoZSBzYWlkIHRoZXkgZG9uJ3QgbWFrZSB0aGVybW9jb3VwbGUgd2lyZSB3aXRoIFRlZnplbCBp bnN1bGF0aW9uLiAgSSBjb3VsZCBjdXN0b20gb3JkZXIgaWYgMjVLIGZ0IG9yIG1vcmUgd2FzIG5l ZWRlZCA6bykuICBIZSdzIGEgbmljZSBndXkgYW5kIHN1Z2dlc3RlZDogaHR0cDovL3d3dy5vbWVn YS5jb20vcHB0c3QvVEZJUl9DSF9DSV9DQ19DWV9BTC5odG1sICBJdCdzIG5vdCBzdHJhbmRlZCBl aXRoZXIuDQogDQpNY01hc3RlcnItQ2FyciBvbiBQZyA1MjcgcGVyIEFsYW4gSy4gQWRhbXNvbidz IHBvc3QuLi4uIGRvZXMgc2VsbCBGRVAgc3RyYW5kZWQgdHlwZSBKICYgSyBpbiAyMGF3Zy4gIEkg ZG9uJ3Qga25vdyBpZiBpdCdzIHR3aXN0ZWQgaG93ZXZlci4NCiANCkknbGwgY29udGFjdCBPbWVn YSBhZ2FpbiAtIGFwcHJlY2lhdGUgYW55IG90aGVyIGluc2lnaHRzLg0KIA0KSm9obg0KIA0KVGlt ZTogMDE6NDY6MDUgUE0gUFNUIFVTDQpGcm9tOiAiUm9iZXJ0IEwuIE51Y2tvbGxzLCBJSUkiIDxu dWNrb2xsc3JAY294Lm5ldD4NClN1YmplY3Q6IFJlOiBBZXJvRWxlY3RyaWMtTGlzdDogRUdUL0NI VCB0aGVybW9jb3VwbGUgY2FibGUNCg0KLS0+IEFlcm9FbGVjdHJpYy1MaXN0IG1lc3NhZ2UgcG9z dGVkIGJ5OiAiUm9iZXJ0IEwuIE51Y2tvbGxzLCBJSUkiIDxudWNrb2xsc3JAY294Lm5ldD4NCg0K QXQgMDM6MjkgUE0gMS8yNC8yMDA2IC0wNjAwLCB5b3Ugd3JvdGU6DQoNCj4tLT4gQWVyb0VsZWN0 cmljLUxpc3QgbWVzc2FnZSBwb3N0ZWQgYnk6ICJKb2huIFR2ZWR0ZSIgPEpvaG5UQGNvbXAtc29s LmNvbT4NCj4NCj5Eb2VzIGFueW9uZSBrbm93IG9mIGEgc291cmNlIGZvciB0d2lzdGVkIHBhaXIg c3RyYW5kZWQgbm9uIHNoZWF0aGVkIEogJg0KPksgdGhlcm1vY291cGxlIGNhYmxlIChleHRlbnNp b24gZ3JhZGUgaXMgZmluZSktIHdpdGggdGVmemVsIGluc3VsYXRpb24/DQo+QWxzbyB3aGF0IGlz IGJlaW5nIHVzZWQgdG8gcHJvdmlkZSBjb25uZWN0L2Rpc2Nvbm5lY3QgY2FwYWJpbGl0eT8NCg0K aHR0cDovL3d3dy5vbWVnYS5jb20vcHB0c3QvRVhHR19KWF9XSVJFLmh0bWwNCg0KaHR0cDovL3d3 dy5vbWVnYS5jb20vcHB0c3QvRVhHR19LWF9XSVJFLmh0bWwNCg0KaHR0cDovL3d3dy5vbWVnYS5j b20vcHB0c3QvR01QLmh0bWwNCg0KDQoNCiAgICAgICAgQm9iIC4gLiAuDQoNCg==


    Message 13


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    Time: 07:35:00 AM PST US
    Subject: EGT/CHT thermocouple cable
    From: "Chuck Jensen" <cjensen@dts9000.com>
    --> AeroElectric-List message posted by: "Chuck Jensen" <cjensen@dts9000.com> John, You mustr have a bad ground or your RF interference is something else!!! Chuck Jensen Do Not Archive -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of John Tvedte Sent: Thursday, January 26, 2006 10:05 AM Subject: Re: AeroElectric-List: EGT/CHT thermocouple cable --> AeroElectric-List message posted by: "John Tvedte" <JohnT@comp-sol.com> Qm9iLA0KIA0KVGhlIGNhYmxlIHJlZmVyZW5jZWQgaXMgbm90IFRlZnplbCBpbnN1bGF0ZWQu ICBU aGUgaGF2ZSBUZWZsb24gUEZBIChQZXJmbHVvcm9hbGtveHkpICBvciBGRVAgKEZsdW9yaW5h dGVk IEV0aHlsZW5lIFByb3B5bGVuZSkuICBUZWZ6ZWwgaXMgRVRGRSAoRXRoeWxuZSBUcmlGbHVv cm9F dGh5bGVuZSkuDQogDQpBbHNvIC0gbm90ZSB0aGF0IHRoZSBvbmx5IHN0cmFuZGVkIHdpcmUg bGlz dGVkIGluIHRoaXMgcmVmZXJlbmNlIGlzIFBWQy4NCiANCkkgY2FsbGVkIE9tZWdhIGFuZCB0 YWxr ZWQgd2l0aCBKb2huIEJhY2ggKEkgdGhpbmsgaGUgaXMgaW4gcHJlLXNhbGVzIHN1cHBvcnQp IGFu ZCBoZSBzYWlkIHRoZXkgZG9uJ3QgbWFrZSB0aGVybW9jb3VwbGUgd2lyZSB3aXRoIFRlZnpl bCBp bnN1bGF0aW9uLiAgSSBjb3VsZCBjdXN0b20gb3JkZXIgaWYgMjVLIGZ0IG9yIG1vcmUgd2Fz IG5l ZWRlZCA6bykuICBIZSdzIGEgbmljZSBndXkgYW5kIHN1Z2dlc3RlZDogaHR0cDovL3d3dy5v bWVn YS5jb20vcHB0c3QvVEZJUl9DSF9DSV9DQ19DWV9BTC5odG1sICBJdCdzIG5vdCBzdHJhbmRl ZCBl aXRoZXIuDQogDQpNY01hc3RlcnItQ2FyciBvbiBQZyA1MjcgcGVyIEFsYW4gSy4gQWRhbXNv bidz IHBvc3QuLi4uIGRvZXMgc2VsbCBGRVAgc3RyYW5kZWQgdHlwZSBKICYgSyBpbiAyMGF3Zy4g IEkg ZG9uJ3Qga25vdyBpZiBpdCdzIHR3aXN0ZWQgaG93ZXZlci4NCiANCkknbGwgY29udGFjdCBP bWVn YSBhZ2FpbiAtIGFwcHJlY2lhdGUgYW55IG90aGVyIGluc2lnaHRzLg0KIA0KSm9obg0KIA0K VGlt ZTogMDE6NDY6MDUgUE0gUFNUIFVTDQpGcm9tOiAiUm9iZXJ0IEwuIE51Y2tvbGxzLCBJSUki IDxu dWNrb2xsc3JAY294Lm5ldD4NClN1YmplY3Q6IFJlOiBBZXJvRWxlY3RyaWMtTGlzdDogRUdU L0NI VCB0aGVybW9jb3VwbGUgY2FibGUNCg0KLS0+IEFlcm9FbGVjdHJpYy1MaXN0IG1lc3NhZ2Ug cG9z dGVkIGJ5OiAiUm9iZXJ0IEwuIE51Y2tvbGxzLCBJSUkiIDxudWNrb2xsc3JAY294Lm5ldD4N Cg0K QXQgMDM6MjkgUE0gMS8yNC8yMDA2IC0wNjAwLCB5b3Ugd3JvdGU6DQoNCj4tLT4gQWVyb0Vs ZWN0 cmljLUxpc3QgbWVzc2FnZSBwb3N0ZWQgYnk6ICJKb2huIFR2ZWR0ZSIgPEpvaG5UQGNvbXAt c29s LmNvbT4NCj4NCj5Eb2VzIGFueW9uZSBrbm93IG9mIGEgc291cmNlIGZvciB0d2lzdGVkIHBh aXIg c3RyYW5kZWQgbm9uIHNoZWF0aGVkIEogJg0KPksgdGhlcm1vY291cGxlIGNhYmxlIChleHRl bnNp b24gZ3JhZGUgaXMgZmluZSktIHdpdGggdGVmemVsIGluc3VsYXRpb24/DQo+QWxzbyB3aGF0 IGlz IGJlaW5nIHVzZWQgdG8gcHJvdmlkZSBjb25uZWN0L2Rpc2Nvbm5lY3QgY2FwYWJpbGl0eT8N Cg0K aHR0cDovL3d3dy5vbWVnYS5jb20vcHB0c3QvRVhHR19KWF9XSVJFLmh0bWwNCg0KaHR0cDov L3d3 dy5vbWVnYS5jb20vcHB0c3QvRVhHR19LWF9XSVJFLmh0bWwNCg0KaHR0cDovL3d3dy5vbWVn YS5j b20vcHB0c3QvR01QLmh0bWwNCg0KDQoNCiAgICAgICAgQm9iIC4gLiAuDQoNCg==


    Message 14


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    Time: 07:46:14 AM PST US
    From: Brian Lloyd <brian-yak@lloyd.com>
    Subject: Re: 3 conductor AWG18 cable
    --> AeroElectric-List message posted by: Brian Lloyd <brian-yak@lloyd.com> Michle Delsol wrote: > --> AeroElectric-List message posted by: =?iso-8859-1?Q?Mich=E8le_Delsol?= <michele.delsol@microsigma.fr> > > I should have been a little more specific - my question related to feeding > the power supply and synching three strobes together. Since the current is > not steady I prefer to shield the feed lines - 4 amps on 18awg should be OK. > On the strobe light side, since we are dealing with 400V or so, amperage is > very low and transient so 22awg should be OK. Actually, amperage is very high on the HV side because you are discharging a capacitor through a virtual dead short (the ionized gas in the flash tube). The pulse is fairly short so the average current is low but the peak is quite high. Use a heavier wire. Also, shielding won't help you much. The high-current pulse will produce one heck of a magnetic field on the wire which the non-magnetic shielding won't do anything to stop. The best thing to do is to make sure that the return (ground) wire is parallel to and closely bound to the HV wire. The magnetic fields will be equal and opposite and will cancel each other out. That is all the shielding you need. As for the synchronization between the power supplies, those pulses are low-voltage, low-current signals between the power supply boxes. You don't really need a heavy wire there. -- Brian Lloyd 2243 Cattle Dr. brian-yak at lloyd dot com Folsom, CA 95630 +1.916.367.2131 (voice) +1.270.912.0788 (fax) I fly because it releases my mind from the tyranny of petty things . . . - Antoine de Saint-Exupery


    Message 15


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    Time: 08:14:48 AM PST US
    Subject: Re: EGT/CHT thermocouple cable
    From: "John Tvedte" <JohnT@comp-sol.com>
    --> AeroElectric-List message posted by: "John Tvedte" <JohnT@comp-sol.com> Bob, The cable referenced is not Tefzel insulated. The have Teflon PFA (Perfluoroalkoxy) or FEP (Fluorinated Ethylene Propylene). Tefzel is ETFE (Ethylne TriFluoroEthylene). Also - note that the only stranded wire listed in this reference is PVC. I called Omega and talked with John Bach (I think he is in pre-sales support) and he said they don't make thermocouple wire with Tefzel insulation. I could custom order if 25K ft or more was needed :o). He's a nice guy and suggested: http://www.omega.com/pptst/TFIR_CH_CI_CC_CY_AL.html It's not stranded either. McMasterr-Carr on Pg 527 per Alan K. Adamson's post.... does sell FEP stranded type J & K in 20awg. I don't know if it's twisted however. I'll contact Omega again - appreciate any other insights. BTW - Omega sells Sub-D type thermocouple alloy pins and sockets. http://www.omega.com/ppt/pptsc.asp?ref=SM_SUB-D_CONN&Nav=temg12 John Time: 01:46:05 PM PST US From: "Robert L. Nuckolls, III" <nuckollsr@cox.net> Subject: Re: AeroElectric-List: EGT/CHT thermocouple cable --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckollsr@cox.net> At 03:29 PM 1/24/2006 -0600, you wrote: >--> AeroElectric-List message posted by: "John Tvedte" <JohnT@comp-sol.com> > >Does anyone know of a source for twisted pair stranded non sheathed J & >K thermocouple cable (extension grade is fine)- with tefzel insulation? >Also what is being used to provide connect/disconnect capability? http://www.omega.com/pptst/EXGG_JX_WIRE.html http://www.omega.com/pptst/EXGG_KX_WIRE.html http://www.omega.com/pptst/GMP.html Bob . . .


    Message 16


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    Time: 08:54:36 AM PST US
    Subject: Bob Archer VOR antenna?
    From: "RV Builder (Michael Sausen)" <rvbuilder@sausen.net>
    --> AeroElectric-List message posted by: "RV Builder (Michael Sausen)" <rvbuilder@sausen.net> You will have a greater chance of airframe shadowing if you mount it in the top of the wingtip. Basically hold it wherever you plan to mount it and look around the airframe. If your line of site includes metals or carbon fiber, expect reduced signal strength and reduced range because of it. Bob is pretty adamant about routing the wires as he shows regardless. However I believe Dan Checkoway and others have ignored that when it was a ways away and he reports no problems. Michael Sausen -10 #352 Fuselage -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Matt Jurotich Sent: Thursday, January 26, 2006 7:10 AM Subject: AeroElectric-List: Bob Archer VOR antenna? --> AeroElectric-List message posted by: Matt Jurotich --> <mjurotich@hst.nasa.gov> Two questions Any significant difference in performance with the antenna installed parallel to the top of the wing vs the bottom? I know that crossing over the Bob Archer wingtip VOR antenna with the strobe and position light wires must be done in the Bob Archer defined way (he provides tie downs in the appropriate locations). But if the wires cross in front of the antenna by 6 to 12 inches is that OK? Thanks Matthew M. Jurotich e-mail mail to: <mjurotich@hst.nasa.gov> phone : 301-286-5919


    Message 17


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    Time: 09:40:46 AM PST US
    From: "Dan Checkoway" <dan@rvproject.com>
    Subject: Re: Bob Archer VOR antenna?
    --> AeroElectric-List message posted by: "Dan Checkoway" <dan@rvproject.com> It wasn't that I ignored it. It's that the instructions really apply to the OLDER style wing tips where the strobes mount on the exterior, further aft. do not archive )_( Dan RV-7 N714D (793 hours) http://www.rvproject.com ----- Original Message ----- From: "RV Builder (Michael Sausen)" <rvbuilder@sausen.net> Sent: Thursday, January 26, 2006 8:53 AM Subject: RE: AeroElectric-List: Bob Archer VOR antenna? > --> AeroElectric-List message posted by: "RV Builder (Michael Sausen)" > <rvbuilder@sausen.net> > > You will have a greater chance of airframe shadowing if you mount it in > the top of the wingtip. Basically hold it wherever you plan to mount it > and look around the airframe. If your line of site includes metals or > carbon fiber, expect reduced signal strength and reduced range because of > it. > > Bob is pretty adamant about routing the wires as he shows regardless. > However I believe Dan Checkoway and others have ignored that when it was a > ways away and he reports no problems. > > Michael Sausen > -10 #352 Fuselage > > -----Original Message----- > From: owner-aeroelectric-list-server@matronics.com > [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Matt > Jurotich > Sent: Thursday, January 26, 2006 7:10 AM > To: aeroelectric-list@matronics.com > Subject: AeroElectric-List: Bob Archer VOR antenna? > > --> AeroElectric-List message posted by: Matt Jurotich > --> <mjurotich@hst.nasa.gov> > > Two questions > > Any significant difference in performance with the antenna installed > parallel to the top of the wing vs the bottom? > I know that crossing over the Bob Archer wingtip VOR antenna with the > strobe and position light wires must be done in the Bob Archer defined way > (he provides tie downs in the appropriate locations). But if the wires > cross in front of the antenna by 6 to > 12 inches is that OK? > > Thanks > > Matthew M. Jurotich > > e-mail mail to: <mjurotich@hst.nasa.gov> > phone : 301-286-5919 > > >


    Message 18


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    Time: 09:54:23 AM PST US
    From: Mickey Coggins <mick-matronics@rv8.ch>
    Subject: Re: 3 conductor AWG18 cable
    --> AeroElectric-List message posted by: Mickey Coggins <mick-matronics@rv8.ch> > Also, shielding won't help you much. The high-current pulse will produce > one heck of a magnetic field on the wire which the non-magnetic > shielding won't do anything to stop. The best thing to do is to make > sure that the return (ground) wire is parallel to and closely bound to > the HV wire. The magnetic fields will be equal and opposite and will > cancel each other out. That is all the shielding you need. Great info. The strobe wires I have, which came with the strobe kit, have three wires, and the whole bundle is shielded. I imagine one wire is a ground, and one of the other two must be the HV wire, but any idea what the third would be? Just curious. Thanks, Mickey -- Mickey Coggins http://www.rv8.ch/ #82007 finishing do not archive


    Message 19


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    Time: 10:28:53 AM PST US
    From: "Bob Lee" <bob@flyboybob.com>
    Subject: Why use starter contactor?
    --> AeroElectric-List message posted by: "Bob Lee" <bob@flyboybob.com> I am using Z-13/8 as a guide to wiring my electrical system and I do not understand why it specifies a starter contactor. The starter already has one so it looks like increased part count which equals reduced relaibility. I looked in the Connection and all I find is "Typical Starter Contactor Wiring" on page 11-21. There is no explanation of what function the starter contactor serves. The archives only gives three hits on "starter contactor" and they do not answer the question: What is the function of the starter contacter listed in Z-13/8? Regards, Bob Lee KR-2 N52BL 92% done only 53% to go!


    Message 20


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    Time: 10:35:15 AM PST US
    Subject: Bob Archer VOR antenna?
    From: "RV Builder (Michael Sausen)" <rvbuilder@sausen.net>
    --> AeroElectric-List message posted by: "RV Builder (Michael Sausen)" <rvbuilder@sausen.net> Ok, so ignored wasn't a good choice of a word for you. :-) Anyway, I beg to differ on the "old style" as Bob still insists on it even with the RV-10 where you could separate the two by more than a foot. It happened to be convenient for me to run them across so I did it anyway but I'm with you that it probably wouldn't make a difference with enough separation. Michael Sausen -10 #352 Fuselage -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Dan Checkoway Sent: Thursday, January 26, 2006 11:40 AM Subject: Re: AeroElectric-List: Bob Archer VOR antenna? --> AeroElectric-List message posted by: "Dan Checkoway" --> <dan@rvproject.com> It wasn't that I ignored it. It's that the instructions really apply to the OLDER style wing tips where the strobes mount on the exterior, further aft. do not archive )_( Dan RV-7 N714D (793 hours) http://www.rvproject.com ----- Original Message ----- From: "RV Builder (Michael Sausen)" <rvbuilder@sausen.net> Sent: Thursday, January 26, 2006 8:53 AM Subject: RE: AeroElectric-List: Bob Archer VOR antenna? > --> AeroElectric-List message posted by: "RV Builder (Michael Sausen)" > <rvbuilder@sausen.net> > > You will have a greater chance of airframe shadowing if you mount it in > the top of the wingtip. Basically hold it wherever you plan to mount it > and look around the airframe. If your line of site includes metals or > carbon fiber, expect reduced signal strength and reduced range because of > it. > > Bob is pretty adamant about routing the wires as he shows regardless. > However I believe Dan Checkoway and others have ignored that when it was a > ways away and he reports no problems. > > Michael Sausen > -10 #352 Fuselage > > -----Original Message----- > From: owner-aeroelectric-list-server@matronics.com > [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Matt > Jurotich > Sent: Thursday, January 26, 2006 7:10 AM > To: aeroelectric-list@matronics.com > Subject: AeroElectric-List: Bob Archer VOR antenna? > > --> AeroElectric-List message posted by: Matt Jurotich > --> <mjurotich@hst.nasa.gov> > > Two questions > > Any significant difference in performance with the antenna installed > parallel to the top of the wing vs the bottom? > I know that crossing over the Bob Archer wingtip VOR antenna with the > strobe and position light wires must be done in the Bob Archer defined way > (he provides tie downs in the appropriate locations). But if the wires > cross in front of the antenna by 6 to > 12 inches is that OK? > > Thanks > > Matthew M. Jurotich > > e-mail mail to: <mjurotich@hst.nasa.gov> > phone : 301-286-5919 > >


    Message 21


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    Time: 10:37:12 AM PST US
    From: "Robert L. Nuckolls, III" <nuckollsr@cox.net>
    Subject: Re: EGT/CHT thermocouple cable
    --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckollsr@cox.net> At 09:22 AM 1/26/2006 -0500, you wrote: >--> AeroElectric-List message posted by: "Ralph E. Capen" ><recapen@earthlink.net> > > >From an earlier post, I understood that this would not be applicable to > a firewall situation as the temperatures are different on either side of > the firewall. >Somebody keep me honest here... We're talking apples and oranges here. (1) D-subs can be a useful means for providing convenience disconnects in thermocouple lines. (2) D-subs are not suitable for firewall penetrations. You can use a d-sub either forward or aft of a protected penetration, just don't depend on it for BOTH convenience disconnect AND protected penetration. Bob . . . < What is so wonderful about scientific truth...is that > < the authority which determines whether there can be > < debate or not does not reside in some fraternity of > < scientists; nor is it divine. The authority rests > < with experiment. > < --Lawrence M. Krauss >


    Message 22


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    Time: 10:50:37 AM PST US
    From: "Ralph E. Capen" <recapen@earthlink.net>
    Subject: Re: EGT/CHT thermocouple cable
    --> AeroElectric-List message posted by: "Ralph E. Capen" <recapen@earthlink.net> Thanks - I knew there was a reason I wasn't gonna do it that way........ Worth the price of my list donation once again........ -----Original Message----- >From: "Robert L. Nuckolls, III" <nuckollsr@cox.net> >Sent: Jan 26, 2006 1:36 PM >To: aeroelectric-list@matronics.com >Subject: Re: AeroElectric-List: EGT/CHT thermocouple cable > >--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckollsr@cox.net> > >At 09:22 AM 1/26/2006 -0500, you wrote: > >>--> AeroElectric-List message posted by: "Ralph E. Capen" >><recapen@earthlink.net> >> >> >From an earlier post, I understood that this would not be applicable to >> a firewall situation as the temperatures are different on either side of >> the firewall. > > >>Somebody keep me honest here... > > > We're talking apples and oranges here. > > (1) D-subs can be a useful means for providing > convenience disconnects in thermocouple lines. > > (2) D-subs are not suitable for firewall penetrations. > You can use a d-sub either forward or aft of > a protected penetration, just don't depend on > it for BOTH convenience disconnect AND > protected penetration. > > Bob . . . > > > < What is so wonderful about scientific truth...is that > > < the authority which determines whether there can be > > < debate or not does not reside in some fraternity of > > < scientists; nor is it divine. The authority rests > > < with experiment. > > < --Lawrence M. Krauss > > > > > > > >


    Message 23


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    Time: 11:04:11 AM PST US
    From: sportav8r@aol.com
    Subject: Re: Why use starter contactor?
    --> AeroElectric-List message posted by: sportav8r@aol.com Bob: its function is to arouse your curiosity so that you'd eventually discover Z-22, and eliminate the extra contactor from your plans; at least, that's what it did for me <g>. Not all starters have these, just the PM types like Sky-Tec. -Bill B -----Original Message----- From: Bob Lee <bob@flyboybob.com> Sent: Thu, 26 Jan 2006 13:32:22 -0500 Subject: AeroElectric-List: Why use starter contactor? --> AeroElectric-List message posted by: "Bob Lee" <bob@flyboybob.com> I am using Z-13/8 as a guide to wiring my electrical system and I do not understand why it specifies a starter contactor. The starter already has one so it looks like increased part count which equals reduced relaibility. I looked in the Connection and all I find is "Typical Starter Contactor Wiring" on page 11-21. There is no explanation of what function the starter contactor serves. The archives only gives three hits on "starter contactor" and they do not answer the question: What is the function of the starter contacter listed in Z-13/8? Regards, Bob Lee KR-2 N52BL 92% done only 53% to go!


    Message 24


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    Time: 11:09:00 AM PST US
    From: "Robert L. Nuckolls, III" <nuckollsr@cox.net>
    Subject: Re: OV Module
    --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckollsr@cox.net> At 06:47 AM 1/26/2006 -0800, you wrote: >--> AeroElectric-List message posted by: "Ron" <rondefly@rtriano.com> > > >I could not get the listed resistors at Digikey and went to Frys, was not >able to get the 1% but was able to get some 2% and 5 %, also on the >BC1.62KZCT could only get a 1.6. I am having problems getting up to the >voltage stated in the troubleshooting area. Is it the tolerance of the >resistors or that 1.62 one maybe? I have checked all my solder joints and >went completely through the troubleshooting guide Bob has with the parts >list. Any help is appreciated. Seems Digikey has shuffled the deck again on catalog numbers. The recommended parts list has been updated to reflect current offerings at: http://aeroelectric.com/articles/Crowbar_OV_Protection/Crowbar_E.pdf It's not possible to troubleshoot your project without seeing it. If you'll mail it to me with some cash for return postage, I'll look it over. 6936 Bainbridge Road Wichita, KS 67226-1008 Bob . . .


    Message 25


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    Time: 11:10:41 AM PST US
    From: "Robert L. Nuckolls, III" <nuckollsr@cox.net>
    Subject: Re: Why use starter contactor?
    --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckollsr@cox.net> At 01:32 PM 1/26/2006 -0500, you wrote: >--> AeroElectric-List message posted by: "Bob Lee" <bob@flyboybob.com> > >I am using Z-13/8 as a guide to wiring my electrical system and I do not >understand why it specifies a starter contactor. The starter already has >one so it looks like increased part count which equals reduced relaibility. >I looked in the Connection and all I find is "Typical Starter Contactor >Wiring" on page 11-21. There is no explanation of what function the starter >contactor serves. The archives only gives three hits on "starter contactor" >and they do not answer the question: What is the function of the starter >contacter listed in Z-13/8? See http://aeroelectric.com/articles/strtctr.pdf Bob . . . < What is so wonderful about scientific truth...is that > < the authority which determines whether there can be > < debate or not does not reside in some fraternity of > < scientists; nor is it divine. The authority rests > < with experiment. > < --Lawrence M. Krauss >


    Message 26


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    Time: 11:44:03 AM PST US
    From: "Mitchell Goodrich" <mgoodrich@tampabay.rr.com>
    Subject: Shunts
    --> AeroElectric-List message posted by: "Mitchell Goodrich" <mgoodrich@tampabay.rr.com> Hello Bob, I haven't seen this addressed anywhere and thought you would have some input. I have 2 different instruments that require a shunt to read amperage. Is there a way to use 1 shunt for 2 instruments? Mitchell 813-356-9758 -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Robert L. Nuckolls, III Sent: Thursday, January 26, 2006 2:09 PM Subject: Re: AeroElectric-List: OV Module --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckollsr@cox.net> At 06:47 AM 1/26/2006 -0800, you wrote: >--> AeroElectric-List message posted by: "Ron" <rondefly@rtriano.com> > > >I could not get the listed resistors at Digikey and went to Frys, was not >able to get the 1% but was able to get some 2% and 5 %, also on the >BC1.62KZCT could only get a 1.6. I am having problems getting up to the >voltage stated in the troubleshooting area. Is it the tolerance of the >resistors or that 1.62 one maybe? I have checked all my solder joints and >went completely through the troubleshooting guide Bob has with the parts >list. Any help is appreciated. Seems Digikey has shuffled the deck again on catalog numbers. The recommended parts list has been updated to reflect current offerings at: http://aeroelectric.com/articles/Crowbar_OV_Protection/Crowbar_E.pdf It's not possible to troubleshoot your project without seeing it. If you'll mail it to me with some cash for return postage, I'll look it over. 6936 Bainbridge Road Wichita, KS 67226-1008 Bob . . .


    Message 27


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    Time: 12:51:58 PM PST US
    From: sportav8r@aol.com
    Subject: Re: Why use starter contactor?
    --> AeroElectric-List message posted by: sportav8r@aol.com I'm planning to buffer my starter switch, wired per Z-22, through a 30A/40A peak-rated Bosch-style automotive relay; light, cheap (under $2), readily available, supports .25" fast-on terminal technology. Any real downside to that? -Bill -----Original Message----- From: Robert L. Nuckolls, III <nuckollsr@cox.net> Sent: Thu, 26 Jan 2006 13:10:21 -0600 Subject: Re: AeroElectric-List: Why use starter contactor? --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckollsr@cox.net> At 01:32 PM 1/26/2006 -0500, you wrote: >--> AeroElectric-List message posted by: "Bob Lee" <bob@flyboybob.com> > >I am using Z-13/8 as a guide to wiring my electrical system and I do not >understand why it specifies a starter contactor. The starter already has >one so it looks like increased part count which equals reduced relaibility. >I looked in the Connection and all I find is "Typical Starter Contactor >Wiring" on page 11-21. There is no explanation of what function the starter >contactor serves. The archives only gives three hits on "starter contactor" >and they do not answer the question: What is the function of the starter >contacter listed in Z-13/8? See http://aeroelectric.com/articles/strtctr.pdf Bob . . . < What is so wonderful about scientific truth...is that > < the authority which determines whether there can be > < debate or not does not reside in some fraternity of > < scientists; nor is it divine. The authority rests > < with experiment. > < --Lawrence M. Krauss >


    Message 28


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    Time: 02:34:12 PM PST US
    From: Nancy Ghertner <nghertner@verizon.net>
    Subject: Re: source for Molex connectors
    --> AeroElectric-List message posted by: Nancy Ghertner <nghertner@verizon.net> On 1/26/06 6:02 AM, "rd2@evenlink.com" <rd2@evenlink.com> wrote: > --> AeroElectric-List message posted by: rd2@evenlink.com > > Can anyone point me to sources for molex connectors? I need several small > ones male-female (2, 3, 4 pin) but neither R-Shack nor local auto stores > seem to have what I need. > > Rumen Allied Electronics www.Alliedelec.com. Lory Ghertner


    Message 29


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    Time: 03:00:15 PM PST US
    From: "Robert L. Nuckolls, III" <nuckollsr@cox.net>
    Subject: Re: Why use starter contactor?
    --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckollsr@cox.net> At 03:50 PM 1/26/2006 -0500, you wrote: >--> AeroElectric-List message posted by: sportav8r@aol.com > >I'm planning to buffer my starter switch, wired per Z-22, through a >30A/40A peak-rated Bosch-style automotive relay; light, cheap (under $2), >readily available, supports .25" fast-on terminal technology. Any real >downside to that? > >-Bill > That will work too . . . Bob . . .


    Message 30


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    Time: 03:03:19 PM PST US
    From: "Robert L. Nuckolls, III" <nuckollsr@cox.net>
    Subject: Re: 3 conductor AWG18 cable
    --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckollsr@cox.net> At 06:53 PM 1/26/2006 +0100, you wrote: >--> AeroElectric-List message posted by: Mickey Coggins ><mick-matronics@rv8.ch> > > > Also, shielding won't help you much. The high-current pulse will produce > > one heck of a magnetic field on the wire which the non-magnetic > > shielding won't do anything to stop. The best thing to do is to make > > sure that the return (ground) wire is parallel to and closely bound to > > the HV wire. The magnetic fields will be equal and opposite and will > > cancel each other out. That is all the shielding you need. > >Great info. The strobe wires I have, which came with the strobe >kit, have three wires, and the whole bundle is shielded. I imagine >one wire is a ground, and one of the other two must be the HV wire, >but any idea what the third would be? Just curious. Ground, HV out to tube, trigger voltage to fire it. See Figure 12-4 in the 'Connection . . . Bob . . .


    Message 31


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    Time: 03:04:31 PM PST US
    From: "Robert L. Nuckolls, III" <nuckollsr@cox.net>
    Subject: Re: Shunts
    --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckollsr@cox.net> At 02:43 PM 1/26/2006 -0500, you wrote: >--> AeroElectric-List message posted by: "Mitchell Goodrich" ><mgoodrich@tampabay.rr.com> > >Hello Bob, > >I haven't seen this addressed anywhere and thought you would have >some input. >I have 2 different instruments that require a shunt to read >amperage. Is there a way to use 1 shunt for 2 instruments? > >Mitchell > >813-356-9758 If they're identical instruments in that the scale factor for full scale readings are the same . . . usually 50 millivolts. Bob . . .


    Message 32


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    Time: 03:17:47 PM PST US
    From: "Bill Denton" <bdenton@bdenton.com>
    Subject: 3 conductor AWG18 cable
    --> AeroElectric-List message posted by: "Bill Denton" <bdenton@bdenton.com> Don't know if it's relevant, but Whelen now sells combined strobe/nav/position lights, run off a single, typically fuselage-mounted, strobe controller. They just use one shielded cable out to the wing tips, with conductors for both the strobes and the nav/position lights. Is it possible that you have some of that cable? -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com]On Behalf Of Robert L. Nuckolls, III Sent: Thursday, January 26, 2006 5:03 PM Subject: Re: AeroElectric-List: 3 conductor AWG18 cable --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckollsr@cox.net> At 06:53 PM 1/26/2006 +0100, you wrote: >--> AeroElectric-List message posted by: Mickey Coggins ><mick-matronics@rv8.ch> > > > Also, shielding won't help you much. The high-current pulse will produce > > one heck of a magnetic field on the wire which the non-magnetic > > shielding won't do anything to stop. The best thing to do is to make > > sure that the return (ground) wire is parallel to and closely bound to > > the HV wire. The magnetic fields will be equal and opposite and will > > cancel each other out. That is all the shielding you need. > >Great info. The strobe wires I have, which came with the strobe >kit, have three wires, and the whole bundle is shielded. I imagine >one wire is a ground, and one of the other two must be the HV wire, >but any idea what the third would be? Just curious. Ground, HV out to tube, trigger voltage to fire it. See Figure 12-4 in the 'Connection . . . Bob . . .


    Message 33


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    Time: 03:41:46 PM PST US
    From: Ken <klehman@albedo.net>
    Subject: Re: Why use starter contactor?
    --> AeroElectric-List message posted by: Ken <klehman@albedo.net> I considered that and then went and bought a 25 amp marine key switch. I wondered whether such a relay would actually increase the chance of the starter sticking on?? Most of them don't seem very robust for a 40 amp rating and inductive loads?? Ken sportav8r@aol.com wrote: >--> AeroElectric-List message posted by: sportav8r@aol.com > >I'm planning to buffer my starter switch, wired per Z-22, through a 30A/40A peak-rated Bosch-style automotive relay; light, cheap (under $2), readily available, supports .25" fast-on terminal technology. Any real downside to that? > >-Bill > >


    Message 34


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    Time: 03:50:17 PM PST US
    From: Charlie Kuss <chaztuna@adelphia.net>
    Subject: Re: Microswitch
    --> AeroElectric-List message posted by: Charlie Kuss <chaztuna@adelphia.net> At 06:37 PM 1/23/2006, you wrote: >--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" ><nuckollsr@cox.net> > >At 03:13 PM 1/23/2006 -0700, you wrote: > > >--> AeroElectric-List message posted by: "Mark R. Supinski" > ><mark.supinski@gmail.com> > > > >Can anyone tell me where to track down the Honeywell microswitch Bob calls > >out in one of the wigwag drawings? I can't seem to find anyone who actually > >stocks it. > > > >Thanks, > > > >Mark Supinski > > It's a rarely used switch, expensive and probably not stocked many > places. Allied would order it for you: > >http://www.alliedelec.com/Search/ProductDetail.asp?SKU=642-0197&SEARCH=4tl1%2D10&ID=&DESC=4TL1%2D10 > > Do a Google search on 4tl1-10. A number of parts suppliers > claim to have them in stock. > > > Bob . . . Bob & Mark, Could a Carling Technologies I series 4 pole toggle switch be substituted here? They don't offer the locking toggle. I ordered an IM251-78 switch for my 2 axis electric trim control. If memory serves me, Digikey charged me about a third of the above mentioned Honeywell switch. See http://toggle-switches.carlingtech.com/heavy-duty-toggle_switch__52.asp http://www.carlingtech.com/pdf/s_i.pdf Charlie Kuss


    Message 35


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    Time: 03:53:34 PM PST US
    From: "Bruce Gray" <Bruce@glasair.org>
    Subject: 3 conductor AWG18 cable
    --> AeroElectric-List message posted by: "Bruce Gray" <Bruce@glasair.org> Whelen literature calls it , Anode, Cathode, and Trigger. Bruce www.glasair.org -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Robert L. Nuckolls, III Sent: Thursday, January 26, 2006 6:03 PM Subject: Re: AeroElectric-List: 3 conductor AWG18 cable --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckollsr@cox.net> At 06:53 PM 1/26/2006 +0100, you wrote: >--> AeroElectric-List message posted by: Mickey Coggins ><mick-matronics@rv8.ch> > > > Also, shielding won't help you much. The high-current pulse will produce > > one heck of a magnetic field on the wire which the non-magnetic > > shielding won't do anything to stop. The best thing to do is to make > > sure that the return (ground) wire is parallel to and closely bound to > > the HV wire. The magnetic fields will be equal and opposite and will > > cancel each other out. That is all the shielding you need. > >Great info. The strobe wires I have, which came with the strobe >kit, have three wires, and the whole bundle is shielded. I imagine >one wire is a ground, and one of the other two must be the HV wire, >but any idea what the third would be? Just curious. Ground, HV out to tube, trigger voltage to fire it. See Figure 12-4 in the 'Connection . . . Bob . . .


    Message 36


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    Time: 04:47:24 PM PST US
    From: Brian Lloyd <brian-yak@lloyd.com>
    Subject: Re: Battery Charging Question - Fight or Switch?
    --> AeroElectric-List message posted by: Brian Lloyd <brian-yak@lloyd.com> Mark R Steitle wrote: > Following an earlier Aero-Electric discussion on battery chargers, I > purchased a Schumacher SC-1200A charger to use in maintaining the > Odyssey PC-680 batteries in my airplane. The charger has settings for > flooded-cell, deep-cycle, and AGM/Gel-cell batteries. I've been using > the AGM/Gel-cell setting. I read today in the document titled Charging > Odyssey Drycell Batteries (www.odysseybatteries.com/charging.htm) where > it states, "In general, do not use either the gel cell or maintenance > free setting, if provided on your charger. Choose the deep cycle > option, should there be one on your charger." So, now I'm confused as > to which to use. My PC-680 doesn't appear to have been harmed by > charging on the AGM/Gel-cell setting, but now I'm confused. Should I > switch to the deep-cycle setting, or continue as before? The charging voltages for AGM and gel-cells are quite different. If the manufacturer has put an AGM/gel setting it means that the manufacturer does not understand the difference between AGM and gel batteries. My guess is that the deep-cycle is probably closer as the charging voltages that AGM batteries like are quite close to the charging voltages needed for properly charging deep-cycle flooded-cell batteries. Ballpark charging voltages (70F-80F, (21C-27C): AGM/deep-cycle Gel-cell Charge 14.3V 13.7V Float 13.4V 13.4V It is interesting to note that the charge and float voltages for gel-cells are close enough together that you can actually get away with one setting for charge and float with gel-cells. 13.6V would probably work well for both charge and float. -- Brian Lloyd 2243 Cattle Dr. brian-yak at lloyd dot com Folsom, CA 95630 +1.916.367.2131 (voice) +1.270.912.0788 (fax) I fly because it releases my mind from the tyranny of petty things . . . - Antoine de Saint-Exupery


    Message 37


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    Time: 04:52:00 PM PST US
    From: Brian Lloyd <brian-yak@lloyd.com>
    Subject: Re: 3 conductor AWG18 cable
    --> AeroElectric-List message posted by: Brian Lloyd <brian-yak@lloyd.com> Mickey Coggins wrote: > Great info. The strobe wires I have, which came with the strobe > kit, have three wires, and the whole bundle is shielded. I imagine > one wire is a ground, and one of the other two must be the HV wire, > but any idea what the third would be? Just curious. There is ground, B+ (about 400V), and trigger. The trigger is a very low current but high voltage (about 3000V) to give the xenon in the tube a "kick" to start it ionizing. Once that happens the capacitor on the +400V line discharges through the tube until there is (virtually) nothing left in the capacitor. At that point the tube winks out and the capacitor charges again. When it comes time for the flashtube to light off again, the power supply sends out the 3000V pulse on the trigger line and the cycle starts all over again. -- Brian Lloyd 2243 Cattle Dr. brian-yak at lloyd dot com Folsom, CA 95630 +1.916.367.2131 (voice) +1.270.912.0788 (fax) I fly because it releases my mind from the tyranny of petty things . . . - Antoine de Saint-Exupery


    Message 38


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    Time: 06:25:30 PM PST US
    From: "Bob C. " <flyboy.bob@gmail.com>
    Subject: Re: source for molex connectors
    --> AeroElectric-List message posted by: "Bob C. " <flyboy.bob@gmail.com> Try http://www.steinair.com/connectors.htm they'll be there before you know it! Good Luck, Bob On 1/26/06, rd2@evenlink.com <rd2@evenlink.com> wrote: > > --> AeroElectric-List message posted by: rd2@evenlink.com > > Can anyone point me to sources for molex connectors? I need several small > ones male-female (2, 3, 4 pin) but neither R-Shack nor local auto stores > seem to have what I need. > > Rumen > >




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