[Elecraft] KX2 Questions

[Gary Memory]

Resending....sent to Walter only by mistake.

On Tue, Apr 13, 2021 at 13:36 Gary Memory <radiomemory at gmail.com> wrote:

> I’ve had my KX2 for a couple years now.  Have taken it with me on dozes of
> trips and hikes.  Done FD with it (to be sure, I didn’t place or win
> anything...by far!).  I use several different external battery packs
> depending on where and what I am doing.  I also keep a charged Elecraft
> battery pack internally.
>
> I’ve always been curious what my battery draw is. This query caused me to
> test it.  Setup:  Internal battery removed.  Antenna is a 1 foot BNC jumper
> into a bird, 25 W slug, bird dummy load on the other side.  External
> battery, Zippy Compact 8400 LiFe, fully charged.  Power connections Johnson
> PP, including a inline blade fuse holder, both POS and Gnd fuses.  Fluke
> meter, measured at the inline fuse holder (volts measured from top of
> fuses, and amps measured by removing the POS fuse and then inserting meter
> leads into the fuse socket.
>
> Results:
> Receive - 13.1 V, .17 A
> TX (XMT button held down until TX is locked ON then turning the PWR up for
> as much RF as it would produce)  12.9 V, 2.2A, bird showing 8 W
>
> Not scientific.  Test gear is not calibrated, but good enuf for me.  I was
> simply curious and have never taken the time.  In the end, I love this
> radio!  Completely perfect for my wants and needs.
>
> Gary, N7BRJ
>
>
> On Tue, Apr 13, 2021 at 12:21 Walter Underwood <wunder at wunderwood.org>
> wrote:
>
>> From the KX-line brochure, the filter passband is variable from 50 to
>> 4000 Hz. The audio peaking filter goes narrower than that.
>>
>> https://ftp.elecraft.com/KX3/Manuals%20Downloads/kxline-11_16.pdf
>>
>> The specs give a current of 1 to 2 A at 10 W. That varies based on the
>> supply voltage, so you need to pick a voltage to get a good answer for
>> that.
>>
>> wunder
>> K6WRU
>> Walter Underwood
>> CM87wj
>> http://observer.wunderwood.org/ (my blog)
>>
>> > On Apr 13, 2021, at 8:03 AM, djchase <djchase at charter.net> wrote:
>> >
>> > I am a long time CW operator, but new to this group.  I am considering
>> purchasing a KX2, but I have been unable to find answers to these two
>> questions:1.  What is the approximate current draw for the KX2 on transmit
>> at 5 watts CW?2.  What is the narrowest receiver filter width on CW? Many
>> thanks in advance for any help with these questions.73 es 72,DaveK8RXB Sent
>> from my Galaxy
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>