[Elecraft] Building KX1 with KXB3080

[Don Wilhelm]

Mike,

Be careful with the power mod.

It is only to be added to a KX1 *if* the power output with a 12 volt 
supply is less than 3 watts.

Do not operate the KX1 at greater than 4 watts at any power supply 
voltage.  Doing so places stress on the output components and can cause 
failure.

THAT is why it is not included as part of the basic build.
Most cases of low power output are associated with problem with the Low 
Pass Filter or the turns spacing on L1 and L2.

If you are getting greater than 4 watts out on your KX1 now, reduce the 
setting for R4 so you do not exceed that 4 watt limit.

73,
Don W3FPR

Mike wrote:
> Steve,
> 
>   The only exceptions I would make to that are 1) the paddle, and 2) the power modification kit.  The power mod kit replaces resistor R30 which I found to be a real hassle once trimmer CA and amplifier Q6 are in place.  I can't think of any reason not to make it part of the basic build.
> 
> Of course, I'm only an hour old so I defer to ANYone else's opinion.
>