[TowerTalk] A3WS HELP

[Jacques RAMBAUD]

A good friend F8BBL is having a problem with a brand new A3WS : the VSWR is not good, the antenna resonate at about 1 MHz too high in frequency despite the fact that dimensions have been double and triple checked, tests have been done at different height .We have increased the length of the driven element by up to 20 cm, resonance shifted no more than 300 KHz.Now we are suspecting that traps are not OK. 
Like to know if somebody had the same problem already?
Does somebody know the resonance frequency of the traps?
Among the 6 traps one looks very different , the central tube is shifted but changing the position of this trap from driven to reflector ended with no change.
Cuscraft is supposed to send an other trap .
Can somebody suggest a method to check the resonance frequency, we had no luck with the MFJ 259 and the dip option ,this week end we will have an Agilent  network analizer so I suppose that coupling with few turns we should see the resonance frequency and see if they all look the same .
Many thanks for the help.
73 Jacques F6BKI