What lore do you ignore?

[Zero-ELEC]

Yes, I do remember that being implied. IIRC it's that the ore is from Corvos which is close to (and I think elsewhere stated to be geographically similar to) Thavnair.

So if it is giantsgall or similar, it's possible that the radios have a small amount of power to protect from a single burst of tempering, but it's the dragon scales that give it lasting energy to protect you in a danger zone, or something like that.

Corvos is across the Corvos Narrow in the Bounty, north of Thavnair. It would make sense if they would share materials. Although Corvos is not geographically similar to Thavnair, but rather to Labyrinthos, which is explicitly said to be based on the geography and climate of Corvos.