[R-390] Alternative to IERC tube shields?

[2002tii]

Osamu Hazawa wrote:

>I found this heat dissipating tube shield originally prepared for
>audiophiles.
>http://thetubestore.com/eat-cooldamper.html
>The heat reduction is just 10% so it must be just waste of money.
>
>Considering the increased price for the IERC tube shields, can it be an
>alternative?

I actually tested these in their original application (high-end 
high-fi), and found that both the plates and the envelopes of tubes 
ran significantly hotter with the devices installed.  More audiofool snake oil.

Best regards,

Don