Posted by Roy on January 15, 2004 at 12:42:16:
In Reply to: Re: Internal wiring of panels? posted by Lew on January 15, 2004 at 07:32:34:
Harry and Lew,
I do remember reading about the skin effect on the HT side of the transformers in the archives.
I an not sure that it is that important when compared to all the other aspects that go into building the speaker such as the copper charge ring, membrane coating and membrane tension.
The stock HT cable looks like a PVC insulated cable with thicker than normal multiple conductors, 0.25mm dia I think. I used a thin walled aircraft cable but as it was some time ago I would have to look up my old invoices to see what the insulation type was, I can say it was not Teflon or PVC though. I ran this through regular PVC sleeve. It is pretty impossible to run comparative tests when building just one pair panels but I must say that I have had no reason to think that I have got this wrong as my speakers are sounding spectacular.
If you did fit new wire here you would not be able to terminate it directly with the stator wire ends because they are potted. You would then have to splice onto the existing wire so you are already taking one step backwards. Added to this you would have had to break through the insulating sleeve to make the join, from a safety point of view another step backwards. I see no benefit at all in changing the stock HT wire over for another type.
My advice is to leave the HT wiring as it is.
The wiring on the primary sides of the transformers is down to personal preference and how flexible you need your cable to be. My favorite is Teflon coated Kimber 15 gauge copper wire but you have to be careful if you have fitted non stock loose resistors or capacitors. This cable has a tendency to fracture at the solder joint if it is flexed repetitively. You would need to hold the cable firmly with a plastic tie-wrap about 1/2” – 1” away from the solder joint to an insulated part of the backplate to prevent any fractures.
Making any wiring changes is a total waste of time though if you retain the banana plug jumpers. Decide on the backplate setting that suite you best and then hard wire the crossover, bypassing the jumpers altogether.
Roy
Roy