[Elecraft] 5W Mod?

[Don Wilhelm]

Jim,

You have sharp eyes!

That mod is simply a change in the number of turns on T4 as indicated on the
schematic.

BUT CONSIDER CAREFULLY:
This change will improve the efficiency at the 5 watt level and below, but
the efficiency will be decreased for power levels above 5 watts.  In
addition, a K2 having this mod should not be used in SSB or any of the data
modes - in other words it should only be applied to a 'CW-only QRP-at-5
watts or below' K2.

If you are going to operate on battery power at less than 5 watts with a CW
only capable K2, then you may want to make the change - otherwise, don't
consider it.

Since most folks want to add the KSB2 option and operate at higher than 5
watts, and possibly add the KPA100, the information has been dropped from
the manual - it remains only on the schematic.

73,
Don W3FPR

> -----Original Message-----
>
> I saw a note on the K2 schematic about improving efficiency at 5W
> levels and
> it suggesting go to a "modifications section."
>
> I can't find any such section in my Manual or the one online.
>
> Where can I find this?
>
> 73
>
> jim ab3cv
>
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