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Old 14th Jan 2018, 8:55 am   #6
dseymo1
Retired Dormant Member
 
Join Date: Dec 2007
Location: Shropshire, UK.
Posts: 3,051
Default Re: Hitachi SR-302 light bulb identification

Quote:
Originally Posted by jamezx88 View Post
Hmm, I'm not sure, but I'm guessing it would be default 240V?

After about an hour it started to get even hotter (specifically the metal plate in the centre) so I switched it off.
The metal plate is a heatsink, intended to dissipate heat produced (mostly) by the output transistors. It's therefore normal for it to get hot, particularly if the set is used at high volume. If it's getting very hot at idle, though, it might be worth checking the bias on the output devices.
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