[Elecraft] Re: KPA100 assembly question

[Wayne Burdick]

Bob, 

All seven milled standoffs in the heatsink should be at the same level. The
additional surrounding mill depth in the part of the heatsink that you mentioned
is taken into account. So there should be no gap between the standoffs and the
PCB at any point. If there is, it must be due to very slight warpage of the PC
board, which is unavoidable in boards of this size. So you should not need a washer.

Remember to put the two shorter standoffs at the front edge of the heatsink,
corresponding with the reduced height of the shield in this area. This is
explained in the instructions.

73,
Wayne
N6KR

Bob Nielsen wrote:
> 
> I inserted the setscrews into the heatsink and threaded the standoffs
> onto five of them.  The one near the back center is at a lower level
> than the others, since the portion of the heatsink where this is
> installed has a section milled below the rest of the heatsink.  When
> the pc board is installed it rests on the other standoffs but there is
> a ~.025 gap between the board and the standoff at that position.  Is
> this correct?  Should a washer be installed to support the board?