[Elecraft] K2 Buyers remorse
jerry
jerry at tr2.com
Sun Aug 8 09:18:52 EDT 2021
On 2021-08-08 00:08, Matt Maguire wrote:
> The K2 works beautifully with the silent KXPA100, if you make a small
> keying circuit:
*** Good idea. Actually, I have do have a keying circuit in my QRP K2.
Bought
it as a kit from W8FGU. Works perfect with my Tiny Linear project.
The Tiny Linear
has a fan also, but not as loud.
I am working on another linear which will have the following
characteristics:
* 15W in, 600W out
* RF deck with a pair of MRF300 LDMOS devices
* All band switched LPF.
* Monstrous heat sink.
* Color touch screen.
* Either no fan, or the quietest fan I can figure out. I will have to
do it by experimentation - detailed thermal design is beyond me :). The
circuit is supposed to
be 70% efficient - that means that for 600W out, you put 750W in, and
have to dissipate
150W. I have a 1-kW RF resistor that can bolt to a backplate. And I
can feed it 86VAC ( for 150W dissipation) from a variac.
Getting a little off-topic here. Sorry about that.
- Jerry KF6VB
More information about the Elecraft
mailing list