[Moon-net] W6PO 2m amp cooling/ ventillation question.

[Hugh Duff]

Work and family commitments have limited my hobby time but I'm finally 
getting close to completing my W6PO 2m 8877 amp.  I have a question 
about venting the plate compartment;

I designed the amp to use an inverted U shaped cover which also acts to 
seal the top of the anode compartment rather than a rectangular cover 
for the plate compartment and separate cover for the complete amp. 
For a cleaner look I thought about making the cover without vent holes 
in the top. Instead I would vent the hot air through suitably sized 
cutouts high up on the back side of the anode compartment. Obviously the 
better the tube can be cooled and vented, the better but I wonder if 
anyone else done this without any ill effects or would I be asking for 
trouble with overheating ?

Also, Is there a recommended material  i.e. mesh/perforated steel etc. 
for RF screening at the blower intake of the input compartment and the 
exhaust hole(s) of the plate compartment ?

73 de Hugh VA3TO
www.va3to.com