Talk:Balun

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There have been persistent attempts to add a link to this page pointing to the home page of an Italian electronics company that offers several models of balun. These have been posted by a number of different IPs, but all making the same errors of wikitext and English syntax and all linking to the same page.

It appears to be wikispam, and the claimed revolutionary nature of their products combined with the pseudo-scientific terminology on their website is not comforting. Andrewa 6 July 2005 17:57 (UTC)

[edit] transformer ground

with the earth ground or chassis ground left floating or unconnected on the balanced side.

All this really means is that the secondary of the transformer is not connected to ground, right? There's no ground in a transformer that isn't connected. — Omegatron 00:48, 16 December 2005 (UTC)

I have not yet really figured out how transformer baluns work and are wired, but I do understand what they do. The function of the balun is more in the transformer than it is in the connections on the outside of the transformer. The goal is to prevent certain current flows (common mode current in the coax shield) while allowing others (opposing currents in the shield vs. center conductor). I should post a good schematic picture. Each type of balun does its job slightly differently. The choke balun prevents the outside current while the coax allows the inside current. The narrow band ("hairpin") coax balun works by shorting out the common mode current with current 180 degrees out of phase -- which is why it is narrow band (you have to get the phase right). The transformer does something goofy with passing two out of three currents in opposing directions; the polarity of the winding connections is critical, but more than that I have not groked. --ssd 05:19, 3 January 2006 (UTC)

[edit] pronunciation guide for 'twin-lead'

I think possibly the pronunciation guide for 'twin-lead' is out of place here; possibly better suited to being moved into the twin-lead article itself? (anon)

I agree. Mostly. Actually, this is an encyclopedia, not a dictionary; I'm not sure the pronuciation guide belongs in the twin-lead article either. But I'll at least remove it here. And proof read the article for anything else I've missed. --ssd 04:32, 3 January 2006 (UTC)

[edit] balun picture

I don't know how to edit it myself, so I thought I'd just mention it here in case anyone wants to fix it. The picture of a 4:1 balun using a ferrite core has mispelled balanced (it's spelled in the picture 'balenced').