Cooling Options for ST-120

The ST-120 seems to run on the very warm side and with summer around the corner thinking about cooling options. A lot of heat builds up in the power tranny while the already hot running Weber SS rectifier and capacitor can are in very close proximity (and the KT88s). I'm most concerned about the cap can baking. As a general rule in electronics for every 10 deg C component temperature rise reduces its life in half and hold especially true for electrolytic caps.

It seems normal convection can't remove all the heat from the amp. Experimenting with a desktop fan blowing gently on the power transformer rear reduces its temperature dramatically to almost room temperature. It doesn't take a lot of air movement but this fan is too loud so need something quieter. Anyone have a other solutions to consider? Thanks as always... Scott

Maybe something like this:
Lasko Clip Stik

I'm not trying to ruffle feathers but just asking for cooling options for my environment. The temperature readings indicate at an ambient temp of 69 deg F the cap can outer case measures 129 deg F. What if the ambient temp is 20 deg F warmer? The can cap would be about 129 + 20 = 149 deg F (65 deg C). Cap life would be 20,000 hrs. @ 65 deg C in this case. I'm just going by the Authenticap datasheet at the rated ripple current (pg 2).
Authenticap Datasheet

that's about 14 years of life if you're lucky enough to spend 4 hours a day listening to them!

Laptop cooler?

I got one of these at Wallyworld back when I had an HTPC that was toasting in the hot August doldrums. Too cheap here to run AC ... 8" fan moves a lot of air but is dead quiet.



You could probably just prop one up behind the amp. Then all you need is a 5v power source ... they make wall warts you can plug the usb cord into ...