Ok. Let’s try this again…RCA 9TC240 Alignment

[Chris K]

So I was able to salvage one core slug out of the 2 in T-103. At this point I don’t have another slug with the coarse thread pitch of the original. I’ve looked on eBay for similar substitutes with no luck. There is a Merit trap coil that is available that’s close. I think this trap is 21.25/22.0 and the Merit trap is 21.25/21.8. I’m wondering if that’s close enough to do some creative tuning to get it to work in the RCA

[Penthode]

The trap in the RCA is mutually coupled to the 21.9MHz tuned stage part of the stagger tuned strip and you really must replace it with the same. It will be easier to fix the RCA transformer.

Looked like the other slug is smashed. Did you damage the coil former encased by the bakelite cover?

If the rest is intact and you need only the core. If the only replacements you have have a finer thread but is of the same diameter, that would work as the slug make the thread in the tube.

Can you show some more pictures? What is the diameter of the slug?