[Amps] Meaning of "conduction cooled"

[Steve Thompson]

Vic K2VCO wrote:
> Floyd Sense wrote:
> 
>>Most amps today use convection cooling.  To me, radiation cooling would 
>>imply no airflow used and that isn't seen very often.
> 
> 
> I would say that external anode tubes like the 3Cx800, etc. are 
> convection (or more precisely, forced-air) cooled, 
But doesn't convection (and forced air) start with conduction between 
the hot surface and the air - so they're all conduction cooled?

I'd say a 'conduction cooled' tube displaces the heat through a solid 
link to a cooled surface rather than conducting it directly into the 
cooling air (or fluid) close to source.

Steve