Wire choice

[rnb]

Hi Kevin

Currently I have resorted to heat shrinking the heater wires so they run parallel vs twisted. I use pvc currently.  In my last builds I twisted the Teflon wires but it was way too hard for me. Just to make it easier now I do it in parallel with pvc. It doesn't seem to introduce hum in the last two builds. The only hum was due to the current balancing of the el34s which is now solved through the BMK mod. 

The other issue I am having is for pvc wires the insulation is very fragile and I guess I'm not quick enough to let the soldering iron off at times where the insulation peels back due to the heat. 
But one thing I try to do is make sure there is not an acute bend to the wire to the socket when wiring to relieve the strain. There is also a wire called Prysmian I think from digikey. They seem to be a bit less prone to pvc peeling back. He alpha wires I used peeled back alot easier. There are also eradicated pvc which stay in place. The colours for those were are a more pastel colour.

Why was twisting the teflon wire difficult? I just put one pair of ends in a vice, and the other ends in a drill on low, and it twists pretty easily.  What gauge was the conductor you were using?

Richard