Aesthetix Calypso getting hot on the left side


I've just bought a used Aesthetix Calypso preamp and I'm very happy with its sound.
But I'm worried as it gets hot over the left side of it.
The source of the heat is on the left side of the common board, just on the left of the AC cable channel before it enter the transformers enclosure.
It's definitely hotter than on the right side, but not so hot that I couldn't place my hand on the cover over it.

Do you think this is normal?

Kiriakos
kiriak
That's where the tubes are. The tubes for the right channel are in the middle and the ones for the left channel are all the way over to the left. There are no tubes near the right corner. No tubes, no heat.
Thanks for the response.

The heat comes from the capacitors or the tranzistor on the left side of the common board (just on the left of the power cord groove).
I hope this helps.
Kiriak -

any tubed gear will get warm to hot. No worries, make certain that it is well-ventilated.
Thanks for the answer!

Do you mean that the tubes get hot?

In my piece, the tubes get a little warm,
but some other components ( a transistor or a few capacitors) on the other common board, just to the left of the power cord canal, get quite hot.

Does an owner of a Calypso have noticed this specific issue?

Excuses for me repeating on this.........