Hi,
ok... now that JPlayer wrote about (why?
) that there's no reason to miss that part of the story to get a larger picture.
Me and Qiaozhi found the Heathkit schematic of original MD used inside the PD.
Qiaozhi at first realized that something similar was both in an old Heathkit schematic but something was wrong in that respect to the reverse engineering schematic of PD, different connections and components.
Then I found another schematic, that time was another , later MD, always by Heathkit, and we realized it was the exact same stuff of what's inside the PD... in it's main part that uses the coil in the round container.
It's an off-resonance kind.
So we concluded that the PD was not a design by Alonso as claimed on the old thread about PD... but something probably modified and adapted by him using parts from different stuff, like that MD from heathkit... that's about 70% of PD circuit...other stuff like audio part is really easy thing and unimportant. Last "unknown" piece is a broadband amplitude modulation receiver... but very basic stuff. There couldn't be a patent about simply cause the technology of that MD is already patented by the Heathkit corp. in the 60's and 70's. The radio part is out maybe from 100years already... what you wanna patent of it ?
Marconi probably hold that patent before...
Now, that's why I told you I'm so sure of no mistakes in the MD part: we know many months ago that it was copied from the Heathkit MD I wrote, that IT IS an Heathkit MD inside just with a smaller coil than original, and so everything is right in it... don't forget Heathkit's engineers made its design!
Actually some of us made it for real, and works also cool, but as normal MD!
But all the rest seems more and more a fairy tale.
Kind regards,
Max