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KX2 Questions

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djchase

KX2 Questions

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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Bob Liesen

Re: KX2 Questions

Hi Dave,
I don't have those numbers in front of me, but wanted to offer that I
have a KX2 and love it. The learning curve for me was pretty steep in
terms of the menus etc, but YMMV. I run almost exclusively CW, and find it
performs very well in that mode. I would strongly recommend the book that
Elecraft offers for this rig, as it is much more detailed than the basic
user manual.

72 es stay well!
Bob WB0POQ

On Tue, Apr 13, 2021 at 10:10 AM djchase <[hidden email]> 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
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

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Bill Lederer

Re: KX2 Questions

I have the kx2 and absolutely love it.

1. What is the approximate current draw for the KX2 on transmit at 5 watts
CW?2.

At 10 watts, it is 1.87 amps. At 5 watts, it is 1.49 amps. Receive is about
0.15 amps.

2. What is the narrowest receiver filter width on CW?

It goes down to 0.05 kHz.

On Tue, Apr 13, 2021 at 10:33 AM Bob Liesen <[hidden email]> wrote:

> Hi Dave,
> I don't have those numbers in front of me, but wanted to offer that I
> have a KX2 and love it. The learning curve for me was pretty steep in
> terms of the menus etc, but YMMV. I run almost exclusively CW, and find it
> performs very well in that mode. I would strongly recommend the book that
> Elecraft offers for this rig, as it is much more detailed than the basic
> user manual.
>
> 72 es stay well!
> Bob WB0POQ
>
> On Tue, Apr 13, 2021 at 10:10 AM djchase <[hidden email]> 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
> > ______________________________________________________________
> > Elecraft mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:[hidden email]
> >
> > This list hosted by: http://www.qsl.net
> > Please help support this email list: http://www.qsl.net/donate.html
> > Message delivered to [hidden email]
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]
>

--
--w8lvn--
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wayne burdick

Re: KX2 Questions

Administrator

In reply to this post by djchase

Hi Dave,

> On Apr 13, 2021, at 8:03 AM, djchase <[hidden email]> 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?

Typically 1.2 to 1.5 amps, varying somewhat with supply voltage and load impedance.

> 2. What is the narrowest receiver filter width on CW?

50 Hz primary audio filter, 30 Hz audio-peaking filter (APF). These can be controlled independently. The bandpass can be widened up to about 4 kHz, as well as shifted. The KX2 also has DSP-based noise blanking, auto-notch, and noise reduction.

73,
Wayne
N6KR

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Gary Memory

Re: KX2 Questions

In reply to this post by djchase

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

On Tue, Apr 13, 2021 at 13:36 Gary Memory <[hidden email]> 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 <[hidden email]>
> 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 <[hidden email]> 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
>> > ______________________________________________________________
>> > Elecraft mailing list
>> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> > Help: http://mailman.qth.net/mmfaq.htm
>> > Post: mailto:[hidden email]
>> >
>> > This list hosted by: http://www.qsl.net
>> > Please help support this email list: http://www.qsl.net/donate.html
>> > Message delivered to [hidden email]
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to [hidden email]
>>
>