813 Amp Build

[W9ZSL]

The 813 arrived today.  Dumb question time.  I'm going to build the RF amp on one chassis and the output Pi Net on another to be mounted just above it; Gates BC-1T style.  813 to be mounted front and center on the RF deck with window.  I know they don't need a lot of cooling and I have a nice fan that can do the job above chassis.

So here's the dumb question.  My socket is a standard ceramic.  There seems to be three ways to mount the thing.  Mine is a Johnson.  Got it and the toob from Al Hart (TNX Al!). Mounting it on top of the chassis is dumb.  So I probably should cut a hole and mount it underneath which is logical.  HOWEVER I've seen situations where the hole is large enough to allow the base of the tube to be recessed and the socket is suspended on metal standoffs below the chassis.  I'm thinking I'd rather mount the ceramic socket below and leave the tube base above.  Is the only advantage reducing panel height?

[VE3LYX]

Some tubes like 807s and 1625s which are also beam power like being mounted low, It is my belief and understanding the extra shielding can be a benifit. I have even done that with some HD 6l6s. And if it is merely a figment of one's imagination what could it heurt?
don

[N2DTS]

Does not matter, but mounting below allows convection air to flow around the tube well.
You an add spring clips to ground the metal base for shielding.
Recessed mounting allows for a shorter front panel.
No point in a window for an 813, the plate is not supposed to glow, and you would need screening or metal coated glass to keep the RF out of your face (and microphone).