Hello friends,

I got a tough question for the wizzards out there.
Today I received 2 used 2245H in pretty good shape.
However one of them that seems to be reconed shows a very strange z-behaviour.
In free air it exhibits a z -max of only 12 Ohm at around 14 Hz.
Its a very flat depressed curve. TSP calculated by CLIO are Qm < 0.5 !! Qt < 0.15 , R dc is only slightly above 4 Ohms.

Its Brother seems to be normal with about 150 Ohms at 18,5 Hz. TSP are quite o.k. also.

Have you ever experienced such a strange thing?
What do you guys think is the reason?
Are the mechanical losses too high?
Can a bad recone job be the reason for this?
Can this unit still be used properly? (besides needing a totally different alignment)

I know thatīs a lot of questions but I just need to know whatīs going on here.
Thanks anyway for all your input
(I could post graphs if anyone would like to know)

cheers

Franz