subject:"\[Elecraft\] Kx2 questions"

Re: [Elecraft] KX2 Questions

2021-04-13 Thread Gary Memory

Resendingsent to Walter only by mistake.

On Tue, Apr 13, 2021 at 13:36 Gary Memory  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 
> 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  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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>
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Re: [Elecraft] KX2 Questions

2021-04-13 Thread Walter Underwood

>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  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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Re: [Elecraft] KX2 Questions

2021-04-13 Thread Wayne Burdick

Hi Dave,

> On Apr 13, 2021, at 8:03 AM, djchase  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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Re: [Elecraft] KX2 Questions

2021-04-13 Thread Bill Lederer

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  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  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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> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:Elecraft@mailman.qth.net
> >
> > This list hosted by: http://www.qsl.net
> > Please help support this email list: http://www.qsl.net/donate.html
> > Message delivered to wb0...@gmail.com
> __
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>


-- 
--w8lvn--
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Re: [Elecraft] KX2 Questions

2021-04-13 Thread Bob Liesen

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  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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> Help: http://mailman.qth.net/mmfaq.htm
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> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to wb0...@gmail.com
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[Elecraft] KX2 Questions

2021-04-13 Thread djchase

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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Re: [Elecraft] Kx2 questions

2016-07-21 Thread Don Wilhelm


Jim,

Re: Data modes ---
Yes, all you need is the cables.  As far as connecting the logic and RF 
grounds together, you may find some improvement by turning MIC BTN in 
the menu to OFF.

Many have been doing that with the KX3, and the KX2 should behave similarly.

If you want the 'best of both worlds', then you will build special 
cables that use a 4 conductor jack to separate the grounds.


73,
Don W3FPR


On 7/21/2016 8:31 PM, Jim Nestor wrote:

Just got my KX2 with ATU & internal battery. Waiting on my paddles. Have a number 
of power sources & antennas to try. Meantime, I have a couple of questions.

1) cabling for digital modes. Looking to run PSK-31 & WSJT-X. Am experienced with those 
modes on Icom 756 Pro II, Flex 1500, and K3. All I need is the cables. From looking at the 
schematics it looks like all  I need is a couple of 1/8" stereo Male-to-Male cables. No 
real question about the receive side. Looks like the transmit side (KX2 mic input) is a 
4-conductor jack with separate signal & logic grounds. Will it work with a 3-conductor 
cable which would seem to short the grounds together?



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Re: [Elecraft] Kx2 questions

2016-07-21 Thread Phil Wheeler

What correction, Jim? Mine are from an iPhone 5s
and work fine with KX2, KX3, various MP3 players,
etc. They look like this:

https://www.amazon.com/Apple-EarPods-Genuine-Stereo-Headphones/dp/B00HVVONP4/ref=sr_1_4?ie=UTF8=1469149621=8-4=apple+earbuds

Caveat: I use only the right side because my left
ear doesn't work

Phil W7OX

On 7/21/16 6:02 PM, Jim Nestor wrote:

Phil,

Correction: earbuds in- question are from iPhone
5 and have 4-conductor plug. They do work with
the iPhone but not with KX2.

Jim, WK8G

Sent from my iPad

On Jul 21, 2016, at 8:45 PM, Phil Wheeler
>
wrote:

My Apple earbuds with 4-conductor do work on my
KX2, Jim.

Phil W7OX

On 7/21/16 5:31 PM, Jim Nestor wrote:

Just got my KX2 with ATU & internal battery. Waiting on my paddles. Have a number
of power sources & antennas to try. Meantime, I have a couple of questions.

1) cabling for digital modes. Looking to run PSK-31 & WSJT-X. Am experienced with those
modes on Icom 756 Pro II, Flex 1500, and K3. All I need is the cables. From looking at the
schematics it looks like all I need is a couple of 1/8" stereo Male-to-Male cables. No
real question about the receive side. Looks like the transmit side (KX2 mic input) is a
4-conductor jack with separate signal & logic grounds. Will it work with a 3-conductor
cable which would seem to short the grounds together?

BTW, I discovered that Apple iPod earbuds (4-conductor plug) don't work. I tried pushing
the plug all the way in, and pulling it out part way. No joy. My expensive Bose earphone
work well, as do my inexpensive over-the-ear "cans". Looking for a set of
earbuds with 3-conductor plug to keep the package small.

2) can anybody recommend a small (cheap) headset? Maybe a computer, telephone,
or gaming headset? I'll probably spring for the MH3, but would like a
hands-free option.

KX2 is going along to a family reunion this weekend. We are both looking
forward to it.

73,

Jim, WK8G

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Re: [Elecraft] Kx2 questions

2016-07-21 Thread Jim Nestor

Phil,

Correction: earbuds in- question are from iPhone 5 and have 4-conductor plug. 
They do work with the iPhone but not with KX2.

Jim, WK8G

Sent from my iPad

> On Jul 21, 2016, at 8:45 PM, Phil Wheeler  wrote:
> 
> My Apple earbuds with 4-conductor do work on my KX2, Jim.
> 
> Phil W7OX
> 
>> On 7/21/16 5:31 PM, Jim Nestor wrote:
>> Just got my KX2 with ATU & internal battery. Waiting on my paddles. Have a 
>> number of power sources & antennas to try. Meantime, I have a couple of 
>> questions.
>> 
>> 1) cabling for digital modes. Looking to run PSK-31 & WSJT-X. Am experienced 
>> with those modes on Icom 756 Pro II, Flex 1500, and K3. All I need is the 
>> cables. From looking at the schematics it looks like all  I need is a couple 
>> of 1/8" stereo Male-to-Male cables. No real question about the receive side. 
>> Looks like the transmit side (KX2 mic input) is a 4-conductor jack with 
>> separate signal & logic grounds. Will it work with a 3-conductor cable which 
>> would seem to short the grounds together?
>> 
>> BTW, I discovered that Apple iPod earbuds (4-conductor plug) don't work. I 
>> tried pushing the plug all the way in, and pulling it out part way. No joy. 
>> My expensive Bose earphone work well, as do my inexpensive over-the-ear 
>> "cans". Looking for a set of earbuds with 3-conductor plug to keep the 
>> package small.
>> 
>> 2) can anybody recommend a small (cheap) headset? Maybe a computer, 
>> telephone, or gaming headset?  I'll probably spring for the MH3, but would 
>> like a hands-free option.
>> 
>> KX2 is going along  to a family reunion this weekend. We are both looking 
>> forward to it.
>> 
>> 73,
>> 
>> Jim, WK8G
> 
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Re: [Elecraft] Kx2 questions

2016-07-21 Thread Lyle Johnson


Yes, this should work fine.

73,

Lyle KK7P



1) ...Looks like the transmit side (KX2 mic input) is a 4-conductor jack with 
separate signal & logic grounds. Will it work with a 3-conductor cable which 
would seem to short the grounds together?


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Re: [Elecraft] Kx2 questions

2016-07-21 Thread Phil Wheeler

My Apple earbuds with 4-conductor do work on my
KX2, Jim.

Phil W7OX

On 7/21/16 5:31 PM, Jim Nestor wrote:

Just got my KX2 with ATU & internal battery. Waiting on my paddles. Have a number
of power sources & antennas to try. Meantime, I have a couple of questions.

2) can anybody recommend a small (cheap) headset? Maybe a computer, telephone,
or gaming headset? I'll probably spring for the MH3, but would like a
hands-free option.

KX2 is going along to a family reunion this weekend. We are both looking
forward to it.

73,

Jim, WK8G

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Re: [Elecraft] Kx2 questions

2016-07-21 Thread Walter Underwood

> On Jul 21, 2016, at 5:31 PM, Jim Nestor  wrote:
> 
> 2) can anybody recommend a small (cheap) headset? Maybe a computer, 
> telephone, or gaming headset?  I'll probably spring for the MH3, but would 
> like a hands-free option.

A lot of people like the Yamaha CM-500. I’ve posted some hints about connecting 
it to the KX3. These probably hold for the KX2.

https://observer.wunderwood.org/2015/08/16/yamaha-cm500-headset-with-ptt-on-elecraft-kx3/
 


The same setup should work for any headset with an electret mic, including some 
cheap gaming headsets.

wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)


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[Elecraft] Kx2 questions

2016-07-21 Thread Jim Nestor

Just got my KX2 with ATU & internal battery. Waiting on my paddles. Have a 
number of power sources & antennas to try. Meantime, I have a couple of 
questions.

1) cabling for digital modes. Looking to run PSK-31 & WSJT-X. Am experienced 
with those modes on Icom 756 Pro II, Flex 1500, and K3. All I need is the 
cables. From looking at the schematics it looks like all  I need is a couple of 
1/8" stereo Male-to-Male cables. No real question about the receive side. Looks 
like the transmit side (KX2 mic input) is a 4-conductor jack with separate 
signal & logic grounds. Will it work with a 3-conductor cable which would seem 
to short the grounds together?

BTW, I discovered that Apple iPod earbuds (4-conductor plug) don't work. I 
tried pushing the plug all the way in, and pulling it out part way. No joy. My 
expensive Bose earphone work well, as do my inexpensive over-the-ear "cans". 
Looking for a set of earbuds with 3-conductor plug to keep the package small.

2) can anybody recommend a small (cheap) headset? Maybe a computer, telephone, 
or gaming headset?  I'll probably spring for the MH3, but would like a 
hands-free option.

KX2 is going along  to a family reunion this weekend. We are both looking 
forward to it.

73,

Jim, WK8G




Sent from my iPad
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Re: [Elecraft] KX2 Questions

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