On Tue, 17 Nov 2020 19:04:35 -0500, OJ Oxford <
bes...@none.com>
wrote:
Sorry for the late reply. I've been busy.
>Well, since I last wrote, I finally completed six male/female
>connectors. I was smart before I started in that I opened the door with
>a fan aiming output outside. Good thing I did because some of the nylon
>got to smelling.
The cable insulation is not nylon. The XT60 connector is nylon. From
your description, methinks the wire is a silicone outer jacket.
>ordered some more 60/40.
60/40 will work, but 63/37 is about the same price and is easier to
work with. Please make sure it has rosin flux suitable for soldering
electronic components. I'm partial to no-clean flux, but the rosin
mildly activated (RMA) flux will work if you clean off the residue
after soldering. Don't use acid core or RA flux on electronics:
<
https://blog.gotopac.com/2020/03/24/rosin-flux-soldering-flux-rosin-types-classification/>
>All I have are some 25 watt pencil irons, maybe a 40 watt, and then we
>jump to a Weller 100/140 gun and 150/240 Radio Shack gun.
25 watts is too small, 40 watts might work depending on how long you
want to wait for the tip to heat and how big a tip you're using. For
a 3/16" chisel tip, that could be a long time. However, don't throw
these pencil irons away. They're the right size for soldering tiny
SMD (surface mount devices) on PCB (printed circuit boards).
>I don't think
>either had the right tip. I might be able to use the Weller if I can
>find the correct tip (or order one).
I'm not going to day anything nice about soldering guns. I have one
that I last used maybe 30 years ago. The basic problems are:
1. No temperature control or regulation.
2. Not enough mass in the tip to maintain temperature.
3. Awkward and clumsy.
4. Copper expansion and contraction causes the nuts to loosen.
5. Tends to burn adjacent components with a big soldering gun tip.
6. Fairly short tip life depending on how it's used.
There are plenty of cheap soldering stations, with temperature
control, and an assortment of tips on eBay or Amazon. I can recommend
something if you want, but I don't like recommending something I
haven't used. I'm still using 60 year old Weller soldering stations.
I keep telling myself that I'll buy something better when I run out of
parts, but it never seems to happen. Maybe something like this:
<
https://www.ebay.com/itm/254768162085>
75 watts. Note that it comes with 10 tips. However, I can't tell if
any of them are large enough to solder the #12 wire.
>I'll apply flame to the wires and see if anything burns off once I strip
>away the outer silicone shell.
You could just try using an ohmmmeter to see if you get conductivity
through the surface of any coating.
>This #12 is very fine silvery looking strands and very flexible. It is
>of the kind used in RC (radio controlled cars and aircraft) often for
>battery connections, etc.
Looks like it's silicon insulation:
<
https://hobbyking.com/en_us/catalogsearch/result/?q=12%20awg%20wire>
<
https://www.amazon.com/BNTECHGO-Silicone-Flexible-Strands-Stranded/dp/B01AQU3ST8>
680 strands of 0.08mm tinned copper wire. I use the stuff for 12V
power cord on portable 2way radios because it doesn't get stiff. It's
NOT waterproof or wicking resistant, so that's not a problem. There's
also no coating on the individual strands of wire.
The wire solders very easily. In fact so easily that I have problems
with the solder creeping up the cable and making the first cm or so
rather stiff. That also begs the question why are you having problems
soldering the wire and XT60 connector? As you can see from the
HobbyKing.com URL, they supply pre-made cables with XT60 connectors.
It should be really easy. My guess is:
1. Bad tip on the soldering gun.
2. Bad soldering gun (not hot enough).
3. Bad solder, wrong solder, no flux, wrong flux, etc.
4. Grease or oil on the connection.
>Because I wasn't able to finish all of the
>soldering today, I did put some under some screw terminals and tightened
>down onto the wire. The circuit powered on and no problems.
Ok, that works. However, I think you'll find that the screws will
chew up the fine wires in the cable. Same problem with crimping.
There's an amazing amount of "air" between the wires. If you screw
down or crimp something to the wire, it will initially feel tight.
However, as you move the cable around, the empty space will fill up
with wire strands and loosen the connection. It's worse with a screw,
which will cut strands that eventually fall out. Screws and crimps
work best with a few strands and heavier gauge wire. For your
application, soldering is the only way.
>Getting rid of the cigarette lighter has made quite a difference with
>heating. Replaced with the chassis mount XT60 and now no heating there
>BUT I can't figure out how to keep the plug in the chassis when
>disconnecting. The whole thing wants to come out.
XT60 panel mounting kit:
<
https://hobbyking.com/en_us/xt60-panel-mounting-kit.html>
There are others. I'm lazy and just glue an L-bracket to both sides
of the XT60 connector.
>No, I don't have any flux. I am going to order some at the same time I
>order more solder later. BTW, any suggestions for a proper solder tip
>for my Weller 100/140 gun would be welcome or even a recommended
>soldering iron but I want to avoid the temp controlled ones to keep cost
>down.
See my comments about flux, solder, and soldering irons.
>Thanks for your encouraging help, much appreciated. I've been an
>electronics hobbyiest for years, but never soldered anything this large.
>During my radio days, sometimes a RG8 cable would have to have an end
>soldered on, but that was about all with the large stuff.
Coaxial cables are difficult to solder. I use crimp type coax
connectors whenever possible:
<
http://www.learnbydestroying.com/jeffl/antennas/Misc/slides/crimpers.html>