[Elecraft] Rig forCW

[Mike Short]

Newer LDMOS amps don’t need much input power to develop full output. I am
building a 600W amp that needs about 3watts input. My KX3 will do
just fine. In fact I had an input attenuator made that will allow full
power from the KX3 drive the amp at full power. I also have a K3/10.

Mike
AI4NS


On Tue, May 12, 2020 at 07:44 W0FK <lladerman at earthlink.net> wrote:

> The KX3 allows you to add roofing filters (KXFL3 option), wherease kx2 does
> not.
>
> “ The KXFL3 is actually 4 different filters that are shared between Phone
> and CW modes.  Containing 2 filters for each mode, the filters switch
> points
> are:
> CW Mode:  500 hz and 1500 hz
> Phone mode:  1800 hz and your choice of 2400 or 2900, menu configurable”
>
> If the kx3 is your main radio, and your focus is CW, having the ability to
> add narrow passband filtering is essential.
>
> Are you planning to run more power than 10-15 watts? If so, adding
> capabilities up to 100 watts via an external amp is pretty simple. If
> you’re
> going to be adding more power, and don’t plan on using the portability of
> the kx3, consider a used K3/100 which has a lot more flexibility for narrow
> roofing filters, 100 amps built in and an easier path to adding a kw amp.
>
> 73, Lou, W0FK
>

>