[Ron Ramirez]

Mike_RF

I read the link, thanks. On my computer when on the Philco Library home page, if I hover my mouse over the Shop Talk > Techniques link, the lower portion of the drop-down menu is not visible so I could not find the page originally. But if I click Techniques, then I can find the link.

Anyway...

That page does not specify which version of model 90 it is talking about - whether it be part (2) in all three versions; part (5) in the early and mid versions, part (7) in the early and mid versions, or part (8) in the late version. So, I cannot tell.

What I can tell you is that the primary winding of coil (2) of your set is the little bobbin mounted at the top of the coil form. The exact number of turns is not critical as long as it is in the neighborhood of 250 turns, and may be scramble wound if it needs to be rewound. As you know in my blog, I cheated and used a bobbin assembly from another Philco coil (not from a 90, but close enough) to fix mine.