Silvertone 8106

[DavGoodlin]

What does your new coil measure compared to the existing one?
Sams schemo shows 4 ohms, and if the new one measured the same as the old one, inductance is likely the same, so it may be better to use only the 33pF caps.

The only way the 4.7 pF would work is if the resonant frequency can be found within the tuning range of L15. The resonant frequency is likely 4.5 MC, so the sound is both amplified by the video amp tube AND taken off via L15 without loading down the video signal going to CRT cathode

Of course, you need to tune the primary and secondary slugs per the sams schematic, which may not have a method simpler than using a signal generator and oscilloscope.

I often did the sound take-off (secondary) by ear but always use a plastic hex tool.