[Elecraft] KX1 power output increase -- free mod kit available

[Randy Rathbun NV0U]

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I have not opened mine up yet, but in looking at this I found a typo  
in the App Note....

it says "Locate resistor R30 on the bottom of the board between  
trimmer pot R30".... should that be R4?

Randy Rathbun NV0U
randy.nv0u at gmail.com
K2#1981, kx1 #1318, ARS #895, QRPARCI #10776, FP#1292, KCQRP #1



On Apr 5, 2006, at 6:07PM, wayne burdick wrote:

> Some KX1s have slightly lower transmitter output than others. When  
> using a 14V supply, the output may be as low as 2.5 to 3 watts  
> across all bands instead of the expected 3 to 4 watts. When using  
> the internal battery the output maybe as low as 0.75 to 1 watt  
> instead of he expected 1 to 1.5 watts.
>
> Some builders have noticed this effect only after installing the  
> KXB3080 option (30/80 meter module). The low-pass filter module  
> supplied with the KXB3080 has slightly different characteristics  
> from the original, which is necessary to obtain coverage of all  
> four bands.
>
> If you think your KX1's output is on the low side, for whatever  
> reason, you can order our model #KX1PWRMODKT at no charge. It's  
> listed at the bottom of our Parts and Mod Kits page:
>
>    http://www.elecraft.com/order_form_parts.htm
>
> The mod kit provides two resistors and instructions, and the change  
> is easy to make. If you have your own stash of resistors, you can  
> just download the application note at:
>
>    http://www.elecraft.com/manual/E740099%20KX1%20Application%20Note 
> %20Rev%20A.pdf
>
> NOTE: We don't recommend making the change if your KX1 already puts  
> out 4 watts or more on some bands. While it's generally safe to  
> operate the KX1 at 5 watts, the design was optimized at the 4-watt  
> level to provide plenty of safety margin in terms of RFI, current  
> drain, and heat sinking via the top cover.
>
> 73,
> Wayne
> N6KR
>
>
> ---
>
> http://www.elecraft.com
>
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