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Clean set. Tubes I can see are OEM. White or yellow = OEM, red labeled are replacements.
Hoz out usually fused with a Bel-Fuse Those 2 green squares are examples
Hoz will be black & say 500-1. Center rear on top or under chassis IF it uses one.
Careful of that HO tube, VERY expensive !
Zeno
I don't recall seeing a fuse for that but I'll get in there tomorrow and look.