RCA CTC2B Peaking Coils

[old_tv_nut]

Do you have the details on what the inductances and self-resonant frequencies should be, and what you actually have?

If you want to experiment, here are some ideas:
If you can't get or wind the proper coils yourself, you might be able to get higher SRF by using 2 coils of half the inductance in series, or some such arrangement. Also, if the SRF is close but you still see ringing, you might try damping the self resonance by putting some large resistance across the coil.