Re: [CAD_CAM_EDM_DRO] re: reliable information and a question about transformers

Hi all, this is for Elliot Burke,
To wind a transformer secondary in a welded laminate frame may not be so
bad. It depends on what voltage you want to have the secondary deliver.
Try one or two turns with a suitable length piece of wire and connect the
primary to a 120v outlet (AC of course) and measure the voltage on the
secondary. From that you can get the "turns per volt" figure you need.
Then, if you only need say 3 volts on the secondary, that figure divided by
the "volts per turn" will give you the number of turns to add. If your
secondary voltage is to be fairly low, you may be in luck and only have to
feed a small number of turns through that closed frame. People hand wind
toroid transformers all the time. Your problem is no different. On the
other hand, If you need 5000 volts, you have a problem and I would suggest
you buy a factory build.
Henry

----- Original Message -----
From: "Elliot Burke" <elliot@...>
To: "CAD_CAM_EDM_DRO" <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Saturday, May 05, 2001 12:11 PM
Subject: [CAD_CAM_EDM_DRO] re: reliable information and a question about
transformers


> Although not a frequent contributor this this list, I have found the
> information here extremely useful.
> The best information is that which allows us to decide for ourselves if
> something is true, and that is the sort most common here.
> It appears that most of the posters here are of the DIY type, and the list
> is for the benefit of DIY's, so what could be better?
>
> Example:
> I just picked up a microwave oven from the side of the road. Took it to
> pieces, removed magnetron (cool!) and transformer. Found the windings to
be
> as described here, that is, separated along the center pole of the
magnetic
> structure. Cut the secondary winding off the transformer with old wood
> chisel.
> The transformer laminations are welded together.
>
> Is there are easy way to wind a secondary on this coil?
>
> or do I have to thread all the wire for each turn through the space where
> the original winding was. Not looking forward to that.
>
> Elliot Burke
>
>
>
> Welcome to CAD_CAM_EDM_DRO@...,an unmoderated list for the
discussion of shop built systems, for CAD, CAM, EDM, and DRO.
>
> Addresses:
> Post message: CAD_CAM_EDM_DRO@yahoogroups.com
> Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
> Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
> List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@...
> Moderator: jmelson@... timg@... [Moderator]
> URL to this page: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
> bill,
> List Manager
>
> FAQ: http://www.ktmarketing.com/faq.html
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>