[Elecraft] High Power PA Option vs. Auto-Tuner and Battery Options

[Ron D' Eau Claire]

> <<The catch is that such an amplifier can't legally be sold in the US.>>
>
> It can't be sold as a separate amplifier but it can and will be
> sold as a part
> for a QRO K2.  Anybody that has a K2 can get the KPA100 as part
> for it...and, if
> slightly enterprising, can build it into a separate enclosure.
>
> Lou W7DZN

There's also an excellent series of "kit" amps that will produce from 100 to
several hundred watts output available from CCI
(http://www.communication-concepts.com/index.html).

See the Builder's Resources/Application Notes/A Homebrew 100 Watt External
Amp for the K2 on the Elecraft web site for an example of a 100 watt version
built by Bob, NC6M.

They are sold legally in the US apparently because they aren't 'turn key'
solutions. They require you to choose the amplifier board you want (for the
desired output power) then choose the output filters you want (for the bands
you want to cover). Bandswitching, T/R switching, enclosure and power supply
design are left up to the builder.

For that reason, I'd not recommend them to a new builder, but they are one
solution to the quest for more power.

Ron AC7AC
K2 # 1289