Posted by
Randy Rathbun NV0U on
URL: http://elecraft.85.s1.nabble.com/KX1-power-output-increase-free-mod-kit-available-tp388518p388521.html
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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
[hidden email]
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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