Tweet
Originally posted by Dave J.
View Post
-
Dave, I have no idea how people become so bitter over time. Yes, there'll always be certain individuals that will trigger your nerves, but that's certainly not THE essence of you. I'm sure you are much softer on the inside. At least here you are among friends. -
daverave, I have been following this thread. I hope you dont mind, but I will try to explain where I think you are missing the point with this cat5 coil... Jose found a way to make an expedient coil with material that was readily to hand. Inside the cat5 cable that Jose uses, are 4 pairs of pvc insulated wire. If you take the "cable" and make two turns as described.... You now have 4 pairs wrapped around twice (or however many times you want ). Now if you were to go to each end of your coil you would be presented with 8 wires on each end.... This is really basic stuff. All you have to do is take one wire and make it your start/ beginning. Check continuity with your multimeter or battery and bulb, and find the OTHER end of the wire. Take the other end and join it to another wire, solder and cover with heatshrink. Keep doing this until all you have is two ends. You now have a coil with 16 turns. Its so easy anyone can do it. And the material Jose uses is a very attractive option, readily available in many places around the world. BnQ and TLC in Kent will have this in stock. Often these cables have different coloured pvc insulation for each of the 4 twisted pairs of wires, which makes it even easier to splice together. Basically Jose has come up with a coil that has lower inter-wire capacitance, than one that is wound with normal enamelled winding/magnet wire, and Jose even mentions this in one of his posts. Jose suggests you use the minimum of solder to make these joins. The smaller and neater the joins, the less likely they are to be detected......Originally posted by daverave View Post
If you studied the examples in the attachments made by Jose and 6666, all this would be crystal clear. Look here :
http://www.geotech1.com/forums/showt...073#post179073
http://www.geotech1.com/forums/showt...110#post179110
http://www.geotech1.com/forums/showt...132#post179132Comment
-
Hello greylourieOriginally posted by greylourie View Post
many thanks for commenting on my post....this is all new to me as in the past ive only used enamelled copper wire...which is very simple and straightforward to wind and is small cluster of wires....i will try this cat6 wire and experiment and see how i get on....i want to make a coil for my hammerhead detector with this cat6 wire...my first coil i used normal copper 30 swg wire but with resin it weighs in at around 500g which is a bit heavy than i wanted....so hopefully this time i can make a bit lighter coil....im really enjoying making my own detectors..and making friends on this forum
Comment
-
i received my cat6 wire today and i just want to know if i have to solder the six wires together to the same wire colours on each end of the coil.... then use shrink wrap on the wires.Comment
-
NOT. solder a wire of one color to a wire of another color.Comment
-
-
daverave. Imagine you have wound a coil with 16 turns. Now take some side-cutters and cut through those 16 turns. What are you left with ? How would YOU rejoin and splice it back together to make it a 16 turn coil again ???? The link kt315 has given you, and the links from Jose and 6666 on this thread explain this. Why not give us a drawing in an attachment, showing how you think the wires should be spliced.Originally posted by daverave View PostComment
-
Hi KT315....thanks for the diagrams which have helped me...can you connect to any wires as long that they are not the same colour ????Comment
-
Dave
take your cat 6 cable and wind it into a circle with several turns.
You now have two ends of the cable with wires at each end.
The cable contains several twisted pairs.
Each pair has a colored wire plus a white wire.
For example if you have 6 pairs that gives you 12 individual wires.
The ends of the colored wires are easy to identify,
you now solder the end of one wire to the end of another wire, so they are all soldered end to end IN SERIES to make one continuous wire. All going in same direction to make a coil.
For example if you have only 4 wires, you solder the end of the blue wire to the end of a white wire, then solder the OTHER end of that white wire to the end of the green wire and the OTHER end of that green wire to the end of a white wire , so one end of the coil is the blue wire and the other end of the coil is the white wire.
blue0---------------------------0white 0----------------------0green0----------------------0white0--------------0
http://www.metdet.ru/korsina2_files/image005.jpgComment
-
The order of which way you solder the wires together does not matter, you can solder all the coloured wires together first or all the whites, your choice,
all you are doing is joining individual wires together to make one single continuous wire.Comment
-
thanks 6666....i can see that now each wire has to be in series....i hope the 3 turn cable will fit into the coil housing....maybe a bit of a squeeze
Comment
-
-
Dave... open this link... there are pics... this is one-layer-printed-coil http://www.md4u.ru/viewtopic.php?f=31&t=8759Comment
-
i had a look at the link kt315...looks very impressive but i think i stick to normal coil....im just in the process of experimenting with the hammerhead pcb...im looking forward to trying different sample widths....and i have some good ideas which i might try out but will need to add second hammerhead pcb to the 1st pcb.Originally posted by kt315 View PostComment
-
i have just wound 2x...12 inch laps of the cat6 wire with an inductance of around 160 uH but the resistance is about 4 ohms...is this correct cause the resistance seems high and i thought should be no more than 1.6 ohm ????Comment
Comment