AudioRoundTable.com - RDF feed
type: channel
description: Audio advice and discussions with audiophiles and professionals. Free discussion forums, open to all and frequented by industry experts. Ask questions and get advice on stereos, speakers, hi-end amplifiers, pre-amps, home theater, tube hi-fi, turntables, vinyl, tweaks, music, films, video, DVDs and more.
items: Winding Solutions

Winding Solutions
type: item
description: Hey-hey!!!, There are always compromises to make whilst picking coil geometry. For an audio output secondary, one usually wants a low DCR. But big wire gages take up a lot of radial space in the bobbin... So, if one wants a 16 ga secondary, look at wire with half this x-section area. 19 ga. Put two of them side by side in parallel. Bi-filar is the term for this method. This method also doubles the pitch of the wind, and cuts the number of turns per axial inch in half. Reducing the pitch is a good thing for high ratio designs. 10k:8R requires a turns ratio of ~35:1. We can get the whole layer covered, without resorting to leaving space between the wires. Winding bi-filar is a PiTA. I have tried it with 26 ga. Took making a few kilos of copper wire scrap before I had anything which looked reasonable. NC machines are soooooo much better at this sort of thing. Faster too. cheers, Douglas
creator: PakProtector
date: 2005-09-17T11:10:18-00:00