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Re: Advice on Primary



Original poster: "david baehr" <dfb25@xxxxxxxxxxx>


That looks VERY NICE !! The one thing I like to do is make a smooth bend of the tubing and take it right down through the base, that way I can make the connections below ,....no sharp edges close to the secondary...........
>From: "Tesla list" <tesla@xxxxxxxxxx>
>To: tesla@xxxxxxxxxx
>Subject: Re: Advice on Primary
>Date: Thu, 24 Feb 2005 07:40:34 -0700
>
>Original poster: "James Robinson" <james.robinson@xxxxxxxxx>
>
>Hi,
>
>I have posted a pic of my "hole" wound primary here along with a pic
>of the secondary :
>
>http://img201.exs.cx/my.php?loc=img201&image=teslaprimary9wc.jpg
>http://img199.exs.cx/my.php?loc=img199&image=secondary1br.jpg
>
>The strike rail isn't quite finished (don't panic there will be a
>break in it!) and needs a bit of straightening - but nearly there.
>The base is made from 6mm polycarbonate, with routings to hold the
>formers which are 3mm polythene glued in with platic glue.
>
>The secondary is about 6" diameter for scale.
>
>James Robinson
>
>
>----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
>To: <tesla@xxxxxxxxxx>
>Sent: Wednesday, February 23, 2005 12:00 AM
>Subject: Advice on Primary
>
>
>>Original poster: "Medina, Benjamin (UMR-Student)" <bamxbb@xxxxxxx>
>>
>>Hello,
>>
>>I know this topic has already been discussed but I am still having
>>doubts when it comes to the winding of the copper tubing through
>>the holes or notches of the supports. So if someone could clear
>>this up for me that would be very much appreciated.
>>
>>As of now this is what I plan on using:
>>
>>1. A 50ft roll of 1/4" OD refrigeration copper tubing.
>>2. A 3/4" thick sheet of plywood as the base.
>>3. 5 supports in an L shape cut out from a cutting board I got at
>>WAL-MART fixed to the plywood base with screws (similar to the
>>image below).
>>
>>
>>http://hot-streamer.com/temp/Medinaimage001.jpg
>>
>>
>>At first I thought of fixing the supports to the base and winding
>>the tubing through the holes, but now I am realizing it will be a
>>PAIN!! Therefore, should I slide in the supports, starting at the
>>center and work my way outside, through the entire roll of tubing?
>>Or should I start at the ends and work my way inside?
>>
>>Some people prefer holes in the supports; others prefer notches. I
>>am not sure about this. I am thinking that the notches might bend
>>the tubing if one is not careful when doing this. Any suggestions?
>>
>>Say I want 15 turns. While winding the tubing, let's say I run out
>>of tubing on the 11th turn. Is it okay to solder another continuous
>>piece of tubing to the original, to complete the 15 turns or not? I
>>guess, what I am asking is if I need a continuous roll of tubing or
>>not? Will this affect the coupling and/or the overall performance
>>of the TC?
>>
>>Another thing I noticed is the fact that the tubing is double
>>wounded, making it even more tedious to work with it. A guy at Home
>>Depot suggested to unroll the tubing on the floor and then wind it
>>on/through the supports. Any suggestions?
>>
>>I appreciate your time. Thanks for the help.
>>
>>Regards,
>>
>>Benjamin Medina
>>Rolla, Missouri.
>
>
>