[AMPS] How much screws on top cover of 2m W6PO 8877 amp?

[Carsten Esch]

Hi,

I build some W6PO 2m linears with the 3CX1500A7 in the past but was
always wondering on how to decide how many screws (what distance between
screws) I should use to get the top cover closed (regarding RF).
What if I use perforated metall for the top cover? What would be the
'maximum' size for these holes? 

Thanks for your answers in advance!

Carsten, DL6LAU

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