[Elecraft] Re: KPA100 assembly question

[Eric Swartz WA6HHQ - Elecraft]

Hi Bob,

The spot you mention is a result of milling the heatsink surface slightly at 
that point to compensate for tolerance build up in the overall flatness of the 
heatsink when it is extruded. There still will be slight variations in the 
flatness of the heatsink mounting locations, but they should not be a problem. 
Its OK to slightly flex the board on installation.  .025" on a PC board the 
size of the KPA100's is not a problem.

73, Eric  WA6HHQ


Bob Nielsen wrote:
> Wayne,
> 
> The manual mentions shorter standoffs at the front edge but those are
> where the heat shield is installed.  I am referring to an earlier step
> on page 35 where the five 3/8" standoffs which support the PC board on
> the heatsink are installed (there are also two standoffs which are part
> of the pedestal).  The heatsink has a milled area at the back where the
> standoff nearest the fan is mounted which is ~.025 or so below the rest
> of the heatsink, so that standoff is lower than the others.
> 
> Bob
>