[Amps] Anode clearance and Chassis WANTED

[2]

>I am building a 4-1000A linear and will have 4KV on the anode.  What is 
>the MINIMUM clearance I must have from the anode to the top of the metal 
>cabinet?  It looks like it will be about 1" in my present configuration. 
> Will that be sufficient to prevent any problems?

€  The max-signal peak-V on the anode is a bit less than double the anode supply V, or, in this case, a tad under 8kV.  In dry air, 8kV can jump about 0.31" or 7.8mm.

>I am looking for a chassis 14"x13.25"x3.25".........may have to go to a 
>shorter one if the answer to above question is NO but really need the 
>3.25" for the input tuning box to fit.
>
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Rich, AG6K, 805-386-3734, www.vcnet.com/measures