a real challange?

[Electronic M]

Originally Posted by Kevin Kuehn

Good to know. I expect that you checked the winding's for continuity prior to installation. We generally don't know the storage environment that NOS coils have been exposed to over the years, so it's not entirely unlikely to find one open.

I see that a lot with early to mid 30s Philco radio antenna and osc coils...they are often corroded open. Luckily they are single layer and easy to rewind by hand.