Reducing Hum Noise on the Epiphone Valve Junior

This is a follow up to the last video I made on the modding of the little 5W Epiphone Valve Junior tube guitar practice amp. The amp sounded pretty good by the end of my wrenching, but still was a bit noisier than I would have liked. In this video, we'll try to solve some of the noise issues inherent in this version of the Valve Junior, which I believe is Version 1. I've also made a mod video on Version 2 of the amp, which I will link below.
Previous Mod Video: https://youtu.be/GnXvm7H9_k0
Version 2 Mod Video: https://youtu.be/YCn-EncL1Sc

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