Alpha Transmission Line Rules?

14G-Dutch^ · 11th February 2006, 05:18 PM

1.) Does An Alpha HAVE to be configured as a Staight line? Can it be folded at all?

2.) Is the Crossectional formula result a Fixed reqirement? Or can you narrow it, and adjust the length?

Thanks,

Jon King

GM · 11th February 2006, 07:37 PM

Greets!

1) No. Yes.

2) No, there's some flexibility, especially if you're willing to reduce stuffing and accept the increased ripple in its passband. If you increase the length, then you lower Fp, ergo the CSA has to increase for a given Qp and vice versa. Bottom line, net Vp needs to be ~constant and there's a ~ half octave Fp flexibility on either side of the optimum without an obviously audible difference in free space, but room modes can of course affect this.

GM

11th February 2006, 05:18 PM	#1
14G-Dutch^ diyAudio Member Join Date: Feb 2006 Location: Columbus Ohio	Alpha Transmission Line Rules? 1.) Does An Alpha HAVE to be configured as a Staight line? Can it be folded at all? 2.) Is the Crossectional formula result a Fixed reqirement? Or can you narrow it, and adjust the length? Thanks, Jon King

11th February 2006, 07:37 PM	#2
GM diyAudio Member Join Date: Jun 2003 Location: Chamblee, Ga.	Re: Alpha Transmission Line Rules? Greets! 1) No. Yes. 2) No, there's some flexibility, especially if you're willing to reduce stuffing and accept the increased ripple in its passband. If you increase the length, then you lower Fp, ergo the CSA has to increase for a given Qp and vice versa. Bottom line, net Vp needs to be ~constant and there's a ~ half octave Fp flexibility on either side of the optimum without an obviously audible difference in free space, but room modes can of course affect this. GM __________________ Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.

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