05-09-2013, 05:13 PM
(This post was last modified: 05-09-2013, 05:22 PM by Radio Fixer.)
I don't think its necessary to use solder tags David, or desirable. The tags will have to be right near the edge and likely to break out the cheek material (I assume you were thinking of riveting them on).
I have never found an O/C field coil where the break was at the lead in or lead out wire ... they lasted decades to this day. Most breaks are from corrosion and the not so good quality of the wire made in those days. I doubt with such elegant construction that you will break a wire but if you do, just clean, twist and solder before a wrap of mylar tape. In fields that I have unwound there were joins, often more than one with different wire being used up (joined in the same exact way and never an open there).
For the lead in wire a good way is to drill a small hole thru the bobbin cheek and push the insulated wire thru it laid along the bobbin. This supports the lead in and then the coil wire can be joined to it. Insulate a smooth joint with tape and wind over it. At the other end its similar but without the support hole. Of course you would put a couple of turns of the tape between the join and the winding.
A maxim of restoration should be don't try to improve on tried and tested methods.
BTW is the voice coil OK, sometimes EKCO for no reason I can see used ali wire that is very prone to being open.
Gary
I have never found an O/C field coil where the break was at the lead in or lead out wire ... they lasted decades to this day. Most breaks are from corrosion and the not so good quality of the wire made in those days. I doubt with such elegant construction that you will break a wire but if you do, just clean, twist and solder before a wrap of mylar tape. In fields that I have unwound there were joins, often more than one with different wire being used up (joined in the same exact way and never an open there).
For the lead in wire a good way is to drill a small hole thru the bobbin cheek and push the insulated wire thru it laid along the bobbin. This supports the lead in and then the coil wire can be joined to it. Insulate a smooth joint with tape and wind over it. At the other end its similar but without the support hole. Of course you would put a couple of turns of the tape between the join and the winding.
A maxim of restoration should be don't try to improve on tried and tested methods.
BTW is the voice coil OK, sometimes EKCO for no reason I can see used ali wire that is very prone to being open.
Gary
