---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Sat 05/15/10: 6 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:45 AM - Re: D-sub connectors, what is disadvantage of solder over crimp? (user9253) 2. 06:53 AM - Re: D-sub connectors, what is disadvantage of solder over crimp? (Charlie England) 3. 09:23 AM - Flap Motor Circuit using Bosch Ice Cube relays (jonlaury) 4. 10:12 AM - Re: D-sub connectors, what is disadvantage of solder over crimp? (Vern Little) 5. 04:15 PM - Re: D-sub connectors, what is disadvantage of solder over crimp? (Robert L. Nuckolls, III) 6. 04:16 PM - Re: Re: D-sub connectors, what is disadvantage of solder over crimp? (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 04:45:21 AM PST US Subject: AeroElectric-List: Re: D-sub connectors, what is disadvantage of solder over crimp? From: "user9253" I believe the advantage of machined pins is a better electrical connection between the male and female pins. Whether to solder or to crimp is another issue. Joe -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=297817#297817 ________________________________ Message 2 _____________________________________ Time: 06:53:10 AM PST US From: Charlie England Subject: Re: AeroElectric-List: D-sub connectors, what is disadvantage of solder over crimp? On 5/15/2010 12:23 AM, rparigoris wrote: > --> AeroElectric-List message posted by: "rparigoris" > > What is the disadvantage of using a 36 or 50 pin solder pot d-sub connectors (while having an extra set of hands to insert wires) where you heat shrink over solder pot and wire compared to using much more expensive machined pin connectors that are crimped? > > Ron Parigoris > Hi Ron, Assuming that the mating areas of the pins/sockets are gold plated, there's no electrical or reliability advantage of one over the other. Contrary to popular hangar-myth, there's no more danger of wire failure outside the joint with solder than with crimp, assuming that both are properly supported outside the joint. Actually, there's a real advantage of using solder type connectors: there's no danger of a pin backing out in use, which happens fairly often with crimp style connectors. The 'disadvantage' is that the skillset required to solder a multi-pin connector properly takes a bit longer to develop than the skillset to squeeze the handles of a crimp tool. (That's basically why crimp was developed: higher productivity & ability to use lower skilled labor). Once you acquire the proper tools (soldering iron, etc) & develop the skills, you can fabricate a cable that will be just as (or more) reliable as any made with crimps. It will just take a bit longer to do it, and you won't be able to move pins around if you get a wire in the wrong location while soldering. Also, once your skills are adequate, there's no need for heat shrink over the joints, since the exposed area of the wire will be very short (just enough to touch with the end of the solder) and will be a rigid extension of the pin itself (can't 'lean over' to touch the next bare wire). Remember, the shell will provide proper support to prevent flexing at the transition from rigid to flexible wire. If you already have a good, controlled heat, fine tip iron, buy a cheap 9pin Dsub connector & start practicing. Charlie Didn't sleep in a Holiday Inn last night, but I was an electronics tech in a couple of past lives. ________________________________ Message 3 _____________________________________ Time: 09:23:22 AM PST US Subject: AeroElectric-List: Flap Motor Circuit using Bosch Ice Cube relays From: "jonlaury" Came across this: Simple tidy and inexpensive. http://www.electricscooterparts.com/relays.html and then look at "Wiring instructions" Read this topic online here: http://forums.matronics.com/viewtopic.php?p=297834#297834 ________________________________ Message 4 _____________________________________ Time: 10:12:48 AM PST US From: "Vern Little" Subject: Re: AeroElectric-List: D-sub connectors, what is disadvantage of solder over crimp? Try soldering when you are upside down underneath your panel and you need to make a wiring change... you'll appreciate crimp connectors much more! For example, Garmin introduced frequency selection on their X96 GPSs and then Dynon announced their HSI functions on their EFIS systems, both well after product introduction. These changes only required the removal and reinsertion of existing crimp wires to enable the functions in my aircraft (a bit of foresight helped as well). You can purchase the pins from Steinair or B&C for a good price, along with the necessary tools. I've been soldering for more than 40 years, and I like the crimp pins better than the solder cup connectors. Vern -------------------------------------------------- From: "Charlie England" Sent: Saturday, May 15, 2010 6:51 AM Subject: Re: AeroElectric-List: D-sub connectors, what is disadvantage of solder over crimp? > > > On 5/15/2010 12:23 AM, rparigoris wrote: >> --> AeroElectric-List message posted by: >> "rparigoris" >> >> What is the disadvantage of using a 36 or 50 pin solder pot d-sub >> connectors (while having an extra set of hands to insert wires) where you >> heat shrink over solder pot and wire compared to using much more >> expensive machined pin connectors that are crimped? >> >> Ron Parigoris >> > Hi Ron, > > Assuming that the mating areas of the pins/sockets are gold plated, > there's no electrical or reliability advantage of one over the other. > Contrary to popular hangar-myth, there's no more danger of wire failure > outside the joint with solder than with crimp, assuming that both are > properly supported outside the joint. Actually, there's a real advantage > of using solder type connectors: there's no danger of a pin backing out > in use, which happens fairly often with crimp style connectors. > > The 'disadvantage' is that the skillset required to solder a multi-pin > connector properly takes a bit longer to develop than the skillset to > squeeze the handles of a crimp tool. (That's basically why crimp was > developed: higher productivity & ability to use lower skilled labor). > > Once you acquire the proper tools (soldering iron, etc) & develop the > skills, you can fabricate a cable that will be just as (or more) > reliable as any made with crimps. It will just take a bit longer to do > it, and you won't be able to move pins around if you get a wire in the > wrong location while soldering. Also, once your skills are adequate, > there's no need for heat shrink over the joints, since the exposed area > of the wire will be very short (just enough to touch with the end of the > solder) and will be a rigid extension of the pin itself (can't 'lean > over' to touch the next bare wire). Remember, the shell will provide > proper support to prevent flexing at the transition from rigid to > flexible wire. > > If you already have a good, controlled heat, fine tip iron, buy a cheap > 9pin Dsub connector & start practicing. > > Charlie > Didn't sleep in a Holiday Inn last night, but I was an electronics tech > in a couple of past lives. > > > > Checked by AVG - www.avg.com > 18:26:00 > ________________________________ Message 5 _____________________________________ Time: 04:15:44 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: D-sub connectors, what is disadvantage of solder over crimp? At 12:23 AM 5/15/2010, you wrote: > > >What is the disadvantage of using a 36 or 50 pin solder pot d-sub >connectors (while having an extra set of hands to insert wires) >where you heat shrink over solder pot and wire compared to using >much more expensive machined pin connectors that are crimped? > >Ron Parigoris Different skill set, more difficult to correct errors. Bob . . . ________________________________ Message 6 _____________________________________ Time: 04:16:30 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: D-sub connectors, what is disadvantage of solder over crimp? At 06:43 AM 5/15/2010, you wrote: > >I believe the advantage of machined pins is a better electrical >connection between the male and female pins. Whether to solder or >to crimp is another issue. Hmmmm . . that may well be. Certainly the machined pins with their 4-quad springs achieve a more robust mating between pins . . . but event the Garmin's and King's use formed pins that are crimped. So I suspect that for small signal applications, the performance differences are insignificant. Bob . . . ------------------------------------------------------------------------------------- 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.