MLTL impedance curve..any help?

[mondogenerator]

im familiar with running impedance curves on reflex and sealed enclosures. My current project is likely to be MLTL, and when completed i wish to run a impedance curve to confirm the designed resonance. Looking at MJK's site it appears at least to be very similar to a reflex impedance curve, with reduced excursion and impedance at the resoanace, unless in reading it wrongly and the other of the twin peaks is due to other factors.

Can anyone confirm if im right assuming its akin to a reflex impedance curve?

 

[planet10]

Yes, an ML-TL looks broadly like a BR. There will also likely be some smaller peaks further up that represent unsuppressesd line resonances. As damping is increased, the lower peak will start decreasing followed by the upper, and the ripples further up should all but disappear.

dave