Appreciate the input Jeff, now the situation makes sense.
I am still curious though about the play on words regard the final head configuration.
Some ads say Biaxial, others say DD.
In engineering terms, I understand there to be an implied difference.
If I were asked to replicate both types, there would be a difference.
So far the lads who have opened these heads have told us nothing about what they have deduced technically.
It will be a pity if the exercise was simply done out of curiosity rather than a proper engineering investigation.
I did contacts one of the recipients to find out if it were possible to purchase the redundant heads, but so far no luck.
There is no mystery regarding the common DD coil, or its various forms of screening. It is the whether the title Bi-axial was truly applicable as something different, rather than being used to imply something a little more complex.....MattR.UK.
MattR.UK.