For minimum airflow resistance for a forced air cooled amplifier it
would seem the blower needs to discharge in a straight line directly
into the underside of the valve socket. This leads to a fairly tall
structure with the blower underneath the RF deck.
What is the "right" way to make the physical connection between blower
and air system socket? Rigid ducting? Something resilient like rubber?
Or (what intrigues me) how about a fabric transition duct as shown in
several places here
http://users.pipeline.com.au/~burst/stc.htm
The "floppy" fabric seems attractive as a way to take up minor (major?)
misalignment between the blower and RF deck if they are built as
separate units and should help isolate any blower vibration. A competent
seamstress (seam-master) would be able to take differences in duct shape
and size in their stride too.
Has anyone got a feel for the pros and cons of the use of fabric rather
than more rigid blower couplings?
73, Alan G3XAQ
--
Alan Ibbetson
alan@g3xaq.net
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