date:20200616

[Elecraft] Future of KPA500 & KAT500

2020-06-16 Thread Don Putnick

With the sunset of the K3S, what are the plans for the future of the KPA500
and KAT500? Enquiring minds want to know.
73 Don NA6Z
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Re: [Elecraft] updated K3

2020-06-16 Thread Paul Gacek via Elecraft

Here is a link to an eBay search that looks for “completed” auction (sold) for 
a K3.

https://www.ebay.com/sch/i.html?_from=R40&_nkw=Elecraft+k3&_in_kw=1&_ex_kw=&_sacat=0_Complete=1&_udlo=&_udhi=&_ftrt=901&_ftrv=1&_sabdlo=&_sabdhi=&_samilow=&_samihi=&_sadis=15&_stpos=92656&_sargn=-1%26saslc%3D1&_salic=1&_sop=13&_dmd=1&_ipg=50&_fosrp=1

Might help gauge what others have paid but prices are quite varied depending on 
supply and demand.

K1 and KX1 sell for more now than when available from Elecraft.

Paul Gacek
W6PNG/M0SNA
www.nomadic.blog

> On Jun 16, 2020, at 5:20 PM, Norman Smith  wrote:
> 
> A couple of yrs ago I bought a K3, in great condition, from a friend who
> was entering an assisted care facility.  I sent it to elecraft to upgrade
> to a k3s equivalent with all updates incl a second receiver and full
> compliment of filters.  The rules in my HOA changed eliminating the
> possibility of an antenna. The radio has sat in the unopened box as
> received back from Elecraft, fully loaded and unpacked.  I"m wondering what
> would be a fair price range to ask for the radio?  all comments welcome
> Norm Smith K7BYV
> 
> 
> Virus-free.
> www.avast.com
> 
> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
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Re: [Elecraft] Field Day and clean radios

2020-06-16 Thread Gwen Patton

I use a Verilux UV-C wand. It's the real deal, not a black light sold as a
sanitizer. I also have a water purifier that makes a combination of
hydrogen peroxide and hypochlorous acid. Put a dose in a liter of water,
let it sit for 30 minutes, and it's purified of all but cryptosporidium...
But leave it 4 hours and that's dead, too.

But put a few doses in a liter of water and don't let it sit, and it's a
very good surface disinfectant that won't hurt anything that water won't
hurt. It's not bleach, it's the same chlorine compound your white blood
cells generate to kill pathogens, and is used in municipal water treatment
systems. Cheap disinfectant, made to order.

You can get a spray bottle that supposedly does the same just for making
disinfectant solution, but the cheap ones are from China and will take a
while to arrive.

73,
Gwen, NG3P

On Tue, Jun 16, 2020, 9:14 PM Wes  wrote:

> I'm glad to see such agreement.  Since I used to do a little woodworking I
> had a
> half box of 3M N95 masks in my shop when this thing hit.  I also bought
> nitrile
> gloves by the box and had about a hundred each of large and small (for my
> SO) on
> hand.  Since then, I've purchased a couple of boxes more of each size
> although
> the gouging doubled the price on the last batch.  Despite now having
> hundreds of
> them, we keep just a couple of pair in the car when we go out and use
> sanitizer
> on them when we get back in the car.
>
> It doesn't damage the gloves and saves our hands.  I would suggest doing
> that
> for the FD operation.
>
> Wes  N7WS
>
> On 6/16/2020 4:31 PM, Wes wrote:
> > If you're going to worry about it, nitrile gloves.
> >
> > Wes  N7WS
> >
> > On 6/16/2020 4:02 PM, AB1DD wrote:
> >> Hi All,
> >>
> >> Question on cleaning a K3, specifically during Field Day. We need to
> clean
> >> the K3 before a change of operators. What is safe, IE not take off the
> button
> >> labels? Alcohol? We will take the rubber ring off the tuning nob.
> >>
> >> What's good?
> >>
> >
> > __
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Re: [Elecraft] Field Day and clean radios

2020-06-16 Thread Adrian

Is it possible that all participants can use their personal laptop for 
remote control, requiring only the clean of the usb cable, and perhaps 
microphone during user change?




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Re: [Elecraft] Field Day and clean radios

2020-06-16 Thread Wes

I'm glad to see such agreement.  Since I used to do a little woodworking I had a 
half box of 3M N95 masks in my shop when this thing hit.  I also bought nitrile 
gloves by the box and had about a hundred each of large and small (for my SO) on 
hand.  Since then, I've purchased a couple of boxes more of each size although 
the gouging doubled the price on the last batch.  Despite now having hundreds of 
them, we keep just a couple of pair in the car when we go out and use sanitizer 
on them when we get back in the car.


It doesn't damage the gloves and saves our hands.  I would suggest doing that 
for the FD operation.


Wes  N7WS

On 6/16/2020 4:31 PM, Wes wrote:

If you're going to worry about it, nitrile gloves.

Wes  N7WS

On 6/16/2020 4:02 PM, AB1DD wrote:

Hi All,

Question on cleaning a K3, specifically during Field Day. We need to clean 
the K3 before a change of operators. What is safe, IE not take off the button 
labels? Alcohol? We will take the rubber ring off the tuning nob.


What's good?



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Re: [Elecraft] Field Day and clean radios

2020-06-16 Thread RICHARD Martin

UV Wands
I checked several LED Chinese uV wands for c band output.  They were
frauds. Buyer beware.

Dick KN6AA

On Tue, Jun 16, 2020, 18:02 W2xj  wrote:

> If that were the case, the radio should never be used outdoors.
>
> Sent from my iPad
>
> > On Jun 16, 2020, at 7:41 PM, Walter Underwood 
> wrote:
> >
> > UV could be rough on the plastic.
> >
> > I strongly agree with the suggestion to use nitrile gloves. That also
> puts the responsibility onto the guest operator instead of onto the person
> who tried to sanitize the radio.
> >
> > wunder
> > K6WRU
> > Walter Underwood
> > CM87wj
> > http://observer.wunderwood.org/ (my blog)
> >
> >> On Jun 16, 2020, at 4:27 PM, W2xj  wrote:
> >>
> >> handheld UV sanitizer.
> >>
> >> Sent from my iPad
> >>
>  On Jun 16, 2020, at 7:03 PM, AB1DD  wrote:
> >>>
> >>> Hi All,
> >>>
> >>> Question on cleaning a K3, specifically during Field Day. We need to
> clean the K3 before a change of operators. What is safe, IE not take off
> the button labels? Alcohol? We will take the rubber ring off the tuning nob.
> >>>
> >>> What's good?
> >>>
> >>> --
> >>>
> >>> 73,
> >>> Carl
> >>> AB1DD
> >>>
> >>> Resistance is futile.
> >>> (don't know about reactance, though)
> >>>
> >>> __
> >>> Elecraft mailing list
> >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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> >>>
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> >>> Please help support this email list: http://www.qsl.net/donate.html
> >>> Message delivered to w...@w2xj.net
> >>
> >> __
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Re: [Elecraft] k4 price Shock

2020-06-16 Thread Adrian


It was far worse before recent AU$ improvement.

The main reason I went with the FTDX101MP instead.


On 17/6/20 10:54 am, Gary Gregory wrote:

lol, well perhaps I should put this in simple perspective: Figures are
Australian Dollars which can be made to look like Banana
republic pesos..TIC ok


Purchase price K4D in AUD  $6,850.00

freight in USD $ ?

10% GST on both K4 plus freight: minimum $685.00

total Minimum Cost landed will be in the order of $7,535 (still got the
freight cost to add)

Price Shock?...Yep,..value for money?..you betcha. Absolutely going to be a
game changer. reality?..Sad face for me.

Not everyone can afford everything they want and as much as I would love to
own one, it is not going to happen. I am happy with my K3 with all the
options I need and it does a great job every day.

let's end this thread now in the interest of not giving Eric extra work :-)

73
gary

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Re: [Elecraft] Field Day and clean radios

2020-06-16 Thread W2xj

If that were the case, the radio should never be used outdoors. 

Sent from my iPad

> On Jun 16, 2020, at 7:41 PM, Walter Underwood  wrote:
> 
> UV could be rough on the plastic.
> 
> I strongly agree with the suggestion to use nitrile gloves. That also puts 
> the responsibility onto the guest operator instead of onto the person who 
> tried to sanitize the radio.
> 
> wunder
> K6WRU
> Walter Underwood
> CM87wj
> http://observer.wunderwood.org/ (my blog)
> 
>> On Jun 16, 2020, at 4:27 PM, W2xj  wrote:
>> 
>> handheld UV sanitizer.
>> 
>> Sent from my iPad
>> 
 On Jun 16, 2020, at 7:03 PM, AB1DD  wrote:
>>> 
>>> Hi All,
>>> 
>>> Question on cleaning a K3, specifically during Field Day. We need to clean 
>>> the K3 before a change of operators. What is safe, IE not take off the 
>>> button labels? Alcohol? We will take the rubber ring off the tuning nob.
>>> 
>>> What's good?
>>> 
>>> -- 
>>> 
>>> 73,
>>> Carl
>>> AB1DD
>>> 
>>> Resistance is futile.
>>> (don't know about reactance, though)
>>> 
>>> __
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>> Message delivered to w...@w2xj.net 
>> 
>> __
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> 
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[Elecraft] k4 price Shock

2020-06-16 Thread Gary Gregory

lol, well perhaps I should put this in simple perspective: Figures are
Australian Dollars which can be made to look like Banana
republic pesos..TIC ok


Purchase price K4D in AUD  $6,850.00

freight in USD $ ?

10% GST on both K4 plus freight: minimum $685.00

total Minimum Cost landed will be in the order of $7,535 (still got the
freight cost to add)

Price Shock?...Yep,..value for money?..you betcha. Absolutely going to be a
game changer. reality?..Sad face for me.

Not everyone can afford everything they want and as much as I would love to
own one, it is not going to happen. I am happy with my K3 with all the
options I need and it does a great job every day.

let's end this thread now in the interest of not giving Eric extra work :-)

73
gary
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[Elecraft] 80 Meter Net 7/14

2020-06-16 Thread Paul Van Dyke

We had 5 show up and put up with the new log issues
THANK YOU ALL!!
NC0JW got in long haul from CO

See you next Sunday night 0100z  3.940 +/-
73's Paul   KB9AVO
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[Elecraft] updated K3

2020-06-16 Thread Norman Smith

A couple of yrs ago I bought a K3, in great condition, from a friend who
was entering an assisted care facility.  I sent it to elecraft to upgrade
to a k3s equivalent with all updates incl a second receiver and full
compliment of filters.  The rules in my HOA changed eliminating the
possibility of an antenna. The radio has sat in the unopened box as
received back from Elecraft, fully loaded and unpacked.  I"m wondering what
would be a fair price range to ask for the radio?  all comments welcome
Norm Smith K7BYV


Virus-free.
www.avast.com

<#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
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Re: [Elecraft] Field Day and clean radios

2020-06-16 Thread Fred Jensen

I volunteered at the local blood center for 15 years or so.  They had 
wipes [can't remember the name] for hands, and Caviwipes for surfaces.


https://www.metrex.com/en-us/products/surface-disinfectants/caviwipes

One can should last all FD and then some, there's a big roll inside 
soaked in the disinfectant.  They seemed safe for any surface, we used 
them to wipe down the apheresis machines which were covered with printed 
legends and the like.


However, I'd recommend nitrile gloves for all the operators.  They go 
inside-out when removed, easy disposal, personal hand wipes for after 
removal.  Clean the radios, mics, paddles, keyboards, and 
monitors/laptops after FD.  This also shifts much of the responsibility 
for appropriate behavior to the operators.


73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County
On 6/16/2020 4:47 PM, George Thornton wrote:

Assuming this is not just keying you are also going to have to disinfect the 
microphone.  You also have issues with computer keyboards for logging.

For working with computers I would think the commercial equipment wipes would 
be OK.

I typically wet paper towels with alcohol so it is damp but not dripping.  I 
have used that method to clean screens and keyboards on laptops with no 
problems.

I do think the virus is pretty vulnerable outside the human body.   70 percent 
or higher concentration of alcohol wiped across a surface should kill any virus 
that got there.

-Original Message-
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of Michael Van Norman
Sent: Tuesday, June 16, 2020 4:36 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Field Day and clean radios

This sounds like the right answer.  Have operators use gloves and then clean 
once at the end.

/Mike
K6VN

On 6/16/20 16:31, Wes wrote:

If you're going to worry about it, nitrile gloves.

Wes  N7WS

On 6/16/2020 4:02 PM, AB1DD wrote:

Hi All,

Question on cleaning a K3, specifically during Field Day. We need to
clean the K3 before a change of operators. What is safe, IE not take
off the button labels? Alcohol? We will take the rubber ring off the
tuning nob.

What's good?


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Re: [Elecraft] Field Day and clean radios

2020-06-16 Thread Hank Garretson

It is endless. Sanitize the radio, the keyboard, the pencil, the paper, the
desk, the chair, the mouse, the ...

Better bet. Keep your blooming hands away from your face! Don't ever touch
your face!

Contest, Cope Exuberantly,

Hank, W6SX
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Re: [Elecraft] Field Day and clean radios

2020-06-16 Thread George Thornton

Assuming this is not just keying you are also going to have to disinfect the 
microphone.  You also have issues with computer keyboards for logging.

For working with computers I would think the commercial equipment wipes would 
be OK.

I typically wet paper towels with alcohol so it is damp but not dripping.  I 
have used that method to clean screens and keyboards on laptops with no 
problems.

I do think the virus is pretty vulnerable outside the human body.   70 percent 
or higher concentration of alcohol wiped across a surface should kill any virus 
that got there.

-Original Message-
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of Michael Van Norman
Sent: Tuesday, June 16, 2020 4:36 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Field Day and clean radios

This sounds like the right answer.  Have operators use gloves and then clean 
once at the end.

/Mike
K6VN

On 6/16/20 16:31, Wes wrote:
> If you're going to worry about it, nitrile gloves.
>
> Wes  N7WS
>
> On 6/16/2020 4:02 PM, AB1DD wrote:
>> Hi All,
>>
>> Question on cleaning a K3, specifically during Field Day. We need to 
>> clean the K3 before a change of operators. What is safe, IE not take 
>> off the button labels? Alcohol? We will take the rubber ring off the 
>> tuning nob.
>>
>> What's good?
>>
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Re: [Elecraft] Field Day and clean radios

2020-06-16 Thread Walter Underwood

UV could be rough on the plastic.

I strongly agree with the suggestion to use nitrile gloves. That also puts the 
responsibility onto the guest operator instead of onto the person who tried to 
sanitize the radio.

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

> On Jun 16, 2020, at 4:27 PM, W2xj  wrote:
> 
> handheld UV sanitizer.
> 
> Sent from my iPad
> 
>> On Jun 16, 2020, at 7:03 PM, AB1DD  wrote:
>> 
>> Hi All,
>> 
>> Question on cleaning a K3, specifically during Field Day. We need to clean 
>> the K3 before a change of operators. What is safe, IE not take off the 
>> button labels? Alcohol? We will take the rubber ring off the tuning nob.
>> 
>> What's good?
>> 
>> -- 
>> 
>> 73,
>> Carl
>> AB1DD
>> 
>> Resistance is futile.
>> (don't know about reactance, though)
>> 
>> __
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Re: [Elecraft] Field Day and clean radios

2020-06-16 Thread Michael Van Norman

This sounds like the right answer.  Have operators use gloves and then 
clean once at the end.


/Mike
K6VN

On 6/16/20 16:31, Wes wrote:

If you're going to worry about it, nitrile gloves.

Wes  N7WS

On 6/16/2020 4:02 PM, AB1DD wrote:

Hi All,

Question on cleaning a K3, specifically during Field Day. We need to 
clean the K3 before a change of operators. What is safe, IE not take 
off the button labels? Alcohol? We will take the rubber ring off the 
tuning nob.


What's good?


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Re: [Elecraft] Field Day and clean radios

2020-06-16 Thread Wes


If you're going to worry about it, nitrile gloves.

Wes  N7WS

On 6/16/2020 4:02 PM, AB1DD wrote:

Hi All,

Question on cleaning a K3, specifically during Field Day. We need to clean the 
K3 before a change of operators. What is safe, IE not take off the button 
labels? Alcohol? We will take the rubber ring off the tuning nob.


What's good?



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Re: [Elecraft] Field Day and clean radios

2020-06-16 Thread W2xj

handheld UV sanitizer.

Sent from my iPad

> On Jun 16, 2020, at 7:03 PM, AB1DD  wrote:
> 
> Hi All,
> 
> Question on cleaning a K3, specifically during Field Day. We need to clean 
> the K3 before a change of operators. What is safe, IE not take off the button 
> labels? Alcohol? We will take the rubber ring off the tuning nob.
> 
> What's good?
> 
> -- 
> 
> 73,
> Carl
> AB1DD
> 
> Resistance is futile.
> (don't know about reactance, though)
> 
> __
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[Elecraft] Field Day and clean radios

2020-06-16 Thread AB1DD


Hi All,

Question on cleaning a K3, specifically during Field Day. We need to 
clean the K3 before a change of operators. What is safe, IE not take off 
the button labels? Alcohol? We will take the rubber ring off the tuning nob.


What's good?

--

73,
Carl
AB1DD

Resistance is futile.
(don't know about reactance, though)

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Re: [Elecraft] KPA1500 Operation on 6 Meters

2020-06-16 Thread Adrian

Ok on that, My best guess now, as I think you are thinking, is that some 
component(s) in the amp 6m circuitry are breaking down, changing impedance


in the amp output sector. Do you have a schematic, or have the link to 
it? A good look at that may give more clues ?


On 17/6/20 1:25 am, Ed G wrote:


Hi Adrian,

 Yes, I also substituted a new piece of coax of different length 
going right from the K3 to the KPA1500 input…same SWR anomaly still 
observed.


--Ed, N3CW—

Sent from Mail  for 
Windows 10


*From: *Adrian 
*Sent: *Tuesday, June 16, 2020 11:09 AM
*To: *Ed G ; Larry (K8UT) 
; elecraft@mailman.qth.net 


*Subject: *Re: [Elecraft] KPA1500 Operation on 6 Meters

Just curious to see if you have tried a different length jumper (coax

patch lead between radio & amp) to see if you get the same result  ?



 



<#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>

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Re: [Elecraft] KPA1500 Operation on 6 Meters

2020-06-16 Thread George Kidder

Internal oscillation suppressed by higher drive level?  What does it do 
in operate with zero drive?



On 6/16/2020 11:25 AM, Ed G wrote:

[This message came from an external source. If suspicious, report to 
ab...@ilstu.edu]

Hi Adrian,
  Yes, I also substituted a new piece of coax of different length going 
right from the K3 to the KPA1500 input…same SWR anomaly still observed.
--Ed, N3CW—


Sent from Mail for Windows 10

From: Adrian
Sent: Tuesday, June 16, 2020 11:09 AM
To: Ed G; Larry (K8UT); elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA1500 Operation on 6 Meters

Just curious to see if you have tried a different length jumper (coax
patch lead between radio & amp) to see if you get the same result  ?

On 17/6/20 12:09 am, Ed G wrote:

This morning I put my DL2K dummy load right on the KPA1500 amp output (tried 
both ANT1 and ANT2)…I am still seeing the same SWR anomaly, where lower drive 
levels are giving high SWR readings on the KPA1500 display.  By putting the 
dummy load right at the KPA1500 output, I eliminated a bunch of coax cables and 
switchboxes.

So at this point the issue appears to be one internal to the KPA1500.  Also 
appears to be not related to any previously-known high power RF causes, as in 
my case the problem is there at low drive levels and goes away at maximum 
drive/RF out.  So I remain puzzled.

--Ed, N3CW—


Sent from Mail for Windows 10

From: Larry (K8UT)
Sent: Monday, June 15, 2020 9:33 PM
To: ed.n...@gmail.com; elecraft@mailman.qth.net
Subject: Re[2]: [Elecraft] KPA1500 Operation on 6 Meters

Ed,

Your dummy load choices at 1500 watts range from expensive and good (Bird) to 
cheap and not-so-good. For example the MFJ-264 is listed as handling 1500 watts 
but if you read the fine print (the derating curve printed on its case ) you're 
limited to 8 seconds at 1500 watts. And each time you stress that dummy load 
its resistor value climbs by a few ohms.

Frustrated with the commercial options available, I built a dummy load using a 
huge heatsink from a salvage VHF transmitter and a series/parallel combination 
of four 50 ohm 250 watt resistors purchased on eBay.

https://www.ebay.com/itm/1PCS-Anaren-RFP-250-50RM-RFP250-50-RF-Power-Flanged-Resistors-250-Watts-50-ohm/133028134252?hash=item1ef9183d6c:g:uHQAAOSwyFhcvsvw

-larry (K8UT)

-- Original Message --
From: "Ed G" 
To: "Larry (K8UT)" ; "elecraft@mailman.qth.net" 

Sent: 2020-06-15 10:57:32 AM
Subject: RE: [Elecraft] KPA1500 Operation on 6 Meters

Hi Larry,
   Yes, exact same problem is there with a known good dummy load in place 
of the Steppir yagi I normally use.
--Ed—


Sent from Mail for Windows 10

From: Larry (K8UT)
Sent: Monday, June 15, 2020 10:09 AM
To: Ed G; elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA1500 Operation on 6 Meters

Ed,

Not seeing that here. SWR value unchanged at 10, 20, 30, 35 watts of
drive. Suggest you test into a dummy load to see if the problem goes
away, which would suggest some issue with power level into the feedline
or antenna.

-larry (K8UT)


-- Original Message --
From: "Ed G" 
To: "elecraft@mailman.qth.net" 
Sent: 2020-06-15 9:48:55 AM
Subject: [Elecraft] KPA1500 Operation on 6 Meters


Folks,
I am trying to understand some odd KPA1500 operation on 6 meters.  When 
setting the power output of my K3 to give varying amounts of drive to the 
KPA1500, I am seeing SWR as displayed on the KPA1500 changing by a significant 
amount depending on the drive level.  This is with the KPA1500 tuner bypassed. 
An LP-100A on the output of the KPA1500 is also used and displays the correct 
low SWR at all drive levels that I would expect to be seeing on the KPA1500 
display.
For example, with 5 watts drive from the K3, I see 1.3 SWR on the 
LP-100, and 2.5:1 on the KPA1500 display.  As I increase drive, the KPA1500 SWR 
display goes down proportionally, until I get to about 40 watts drive. At the 
40 watt drive level, I am seeing a nice healthy 1600 watts output, and both the 
LP-100 and the KPA1500 are showing the same 1.3 SWR.  15 watts drive shows 1.3 
on the LP100 and 2.0:1 on the KPA1500 display. So I am not sure why the SWR 
sensing and display in the KPA1500 is behaving this way?  I do not see this 
oddity on any other bands.
I might also add that attempting to get the KPA1500 internal tuner to 
bring down the high SWR as seen on the KPA1500 results in a drop in SWR 
displayed on the KPA1500 to where SWR almost equals that on the LP-100, but 
using the tuner I would expect that to be even better.
--Ed—




--
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
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Re: [Elecraft] Q codes

2020-06-16 Thread Fred Jensen


ZPA: Your speech is distorted

QNR: I am approaching my point of no return

73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 6/16/2020 12:01 PM, Todd KH2TJ wrote:

 Forget off hand what the Z code was for
"Your totally distorted"!  but after a weeks worth of watchstanding,  
I would treat the younger Marines on my watch to total distortion down 
at the E club on the start of our off time and we'd all get to the 
"point of no return" (forgot that Z code too!)...


73, Todd KH2TJ



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Re: [Elecraft] Best Audio Interfaces 2020?

2020-06-16 Thread K1FFX

I have two of these:

https://www.amazon.com/Behringer-U-Control-UCA202-Ultra-Low-Interface/dp/B000KW2YEI

I've used them on Windows, Mac OS, and Raspberry Pi ... just plug-and-play,
no drivers needed anywhere.  Also use them with my sound system for
connecting my laptop to an analog audio mixer.  The UCA202 also has an
optical stereo output, which I've used.

My experience using either Windows or Mac OS is that it's much easier to
interface with an external USB soundcard than it is using the audio in/out
jacks on the PC.

Nice device for not much money.

Regards -

Bruce K1FFX




-
Bruce Rosen
K1FFX
K2/100 6982 KSB2 KAT100-1 KAF2 KIO2

--
Sent from: http://elecraft.365791.n2.nabble.com/
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Re: [Elecraft] Q codes

2020-06-16 Thread Todd KH2TJ

It was an unwritten rule, but the use of ZBM2 on any circuit was a big no-no, 
or at least during my time with Naval Security Group.   Anytime we had trubs 
with an outlying station, we would gather up the translog and any other copy of 
the Comms and up the chain of command it would go...I think I only saw a ZBM2 
fly by once while I was out on Guam.  It went across one of IO circuits during 
GW I.  Heard thru the grapevine weeks later that Op was relieved...We were 
required to maintain a copy  of the ACP-131 on the watch floor.  It made for 
some interesting reading on slow mid-watches.  I recall we came up with all 
sorts of Q/Z codes that we Zapped back and forth.  I think we used INT QBF Mate 
K quite often in place of ZBM2      Always a good laugh to get a Chief of the 
Watch to ask what the hell was QBF... There were all kinds of Z codes in use 
too that we would throw out just to mess with the ops on the other end...Great 
times during  a slow midwatch!   Forget off hand what the Z code was for
"Your totally distorted"!  but after a weeks worth of watchstanding,  I would 
treat the younger Marines on my watch to total distortion down at the E club on 
the start of our off time and we'd all get to the "point of no return" (forgot 
that Z code too!)...


73, Todd KH2TJ





Good point Andy!  QLF seems to refer to sending ability.  ZBM2 refers to
overall operating ability ... I think ... ACP's 126 and 131 leave a lot
to the reader's imagination.


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Re: [Elecraft] K3s discontinued?

2020-06-16 Thread hawley, charles j jr

I wondered too, since the K4 was almost a bargain with it's features over the 
K3 with options price wise.

I watched the video...ELECRAFT K4 IN DEPTH with WA6HHQ at Waters & Stanton Ltd 
Portsmouth UK

https://www.youtube.com/watch?v=r-PHL68WIdg

and got anxious to get one when they quit hogging them for themselves. :)

Chuck KE9UW
c-haw...@illinois.edu

Sent from my iPad

On Jun 16, 2020, at 11:56 AM, Charlie T  wrote:

I don't understand the "shock" at the K4 pricing.

If you "load-up" a K3S with all the options you'd have to buy that are
included in the K4,  AND add a P3,  with VGA & transmit monitor,
I think you'll find the K4 is a BARGAIN!

73, Charlie k3ICH




-Original Message-
From: elecraft-boun...@mailman.qth.net  On
Behalf Of Wayne Burdick
Sent: Monday, June 15, 2020 11:24 PM
To: Gary Gregory 
Cc: Elecraft Reflector 
Subject: Re: [Elecraft] K3s discontinued?

Gary, VK1ZZ, wrote:

I was hoping to add a K3s to my current setup (K3 #679) but that
appears to be out of the question dammit.


Hi Gary,

We sold the last K3S, I believe, but we'll have a number of upgraded, fully
warranted K3's available for purchase on the web site sometime soon. Some
were used for DXpeditions.


Was there a reason why the K3s was discontinued?

Yes; we felt it was time to create a new, hybrid SDR with a large,
integrated touch screen and virtually unlimited hardware/software expansion
capability.

The K3/K3S had a good run -- over 12 years. During that time we created many
options and accessories and released dozens of free firmware upgrades.
Everything we learned from that experience, plus a lot of new R, is being
incorporated into the K4. (It's an exciting radio. For me, every morning
it's a battle of wills to stop playing with it and get my work done :)

We're looking forward to getting the K4 into customers' hands. Our suppliers
are coming back on line. And so are we ... but we're prioritizing the health
of our staff, which requires some heroics from the facilities department.

73,
Wayne
N6KR



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Re: [Elecraft] K3s discontinued?

2020-06-16 Thread Wes

Speaking of pricing shock, two weeks ago I took, "Sparky", my little 18-pound 
Poodle-mix dog to his favorite dog park.  Inside the enclosure there is a 
half-buried piece of 3-foot diameter concrete pipe that makes a tunnel for the 
dogs to run through.  He ran in and immediately yipped, came out and ran to the 
far end of the enclosure faster that I've ever seen him go.  I ran to the pipe 
and discovered a very agitated Diamondback rattlesnake, buzzing away.  I 
gathered up Sparky and discovered puncture wounds right on his snout.


Fortunately, our vet's office was ten minutes away.  They are using "curb 
service" with the virus issue so they took in the dog and my credit card.  Once 
they ran the card for a $1K deposit they began treatment.  Several days and 
nights of agony for us and the dog later, he is doing fine with just a couple of 
scabs left on the nose.  The final cost was $3,200, almost exactly the price I 
paid for my K3S.


Wes  N7WS


  On 6/15/2020 8:32 PM, Charlie T wrote:

I don't understand the "shock" at the K4 pricing.

If you "load-up" a K3S with all the options you'd have to buy that are
included in the K4,  AND add a P3,  with VGA & transmit monitor,
  I think you'll find the K4 is a BARGAIN!

73, Charlie k3ICH




-Original Message-
From: elecraft-boun...@mailman.qth.net  On
Behalf Of Wayne Burdick
Sent: Monday, June 15, 2020 11:24 PM
To: Gary Gregory 
Cc: Elecraft Reflector 
Subject: Re: [Elecraft] K3s discontinued?

Gary, VK1ZZ, wrote:


I was hoping to add a K3s to my current setup (K3 #679) but that
appears to be out of the question dammit.


Hi Gary,

We sold the last K3S, I believe, but we'll have a number of upgraded, fully
warranted K3's available for purchase on the web site sometime soon. Some
were used for DXpeditions.



Was there a reason why the K3s was discontinued?

Yes; we felt it was time to create a new, hybrid SDR with a large,
integrated touch screen and virtually unlimited hardware/software expansion
capability.

The K3/K3S had a good run -- over 12 years. During that time we created many
options and accessories and released dozens of free firmware upgrades.
Everything we learned from that experience, plus a lot of new R, is being
incorporated into the K4. (It's an exciting radio. For me, every morning
it's a battle of wills to stop playing with it and get my work done :)

We're looking forward to getting the K4 into customers' hands. Our suppliers
are coming back on line. And so are we ... but we're prioritizing the health
of our staff, which requires some heroics from the facilities department.

73,
Wayne
N6KR



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[Elecraft] K3s for sale

2020-06-16 Thread barry halterman

I sold the Kx3 and Px3, however I still need a good home for the K3s. It is
very clean, none smoker, and has extra filters BUT no ATU or DVR.
Serious inquiries only.
Thanks for reading
Barry
K3bo
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Re: [Elecraft] K3s discontinued?

2020-06-16 Thread W6IPA

This is probably true in term of value. I am also on the opinion that having an 
option between the K2 and the K4 makes sense, even if it doesn’t have all the 
bells and whistles. Like having a kx2 and kx3.

JC/W6IPA.

> On Jun 15, 2020, at 8:32 PM, Charlie T  wrote:
> 
> I don't understand the "shock" at the K4 pricing.
> 
> If you "load-up" a K3S with all the options you'd have to buy that are 
> included in the K4,  AND add a P3,  with VGA & transmit monitor, 
> I think you'll find the K4 is a BARGAIN!
> 
> 73, Charlie k3ICH
> 
> 
> 
> 
> -Original Message-
> From: elecraft-boun...@mailman.qth.net 
>   > On
> Behalf Of Wayne Burdick
> Sent: Monday, June 15, 2020 11:24 PM
> To: Gary Gregory mailto:vk1zzg...@gmail.com>>
> Cc: Elecraft Reflector  >
> Subject: Re: [Elecraft] K3s discontinued?
> 
> Gary, VK1ZZ, wrote:
> 
>> I was hoping to add a K3s to my current setup (K3 #679) but that 
>> appears to be out of the question dammit.
> 
> 
> Hi Gary,
> 
> We sold the last K3S, I believe, but we'll have a number of upgraded, fully
> warranted K3's available for purchase on the web site sometime soon. Some
> were used for DXpeditions.
> 
> 
>> Was there a reason why the K3s was discontinued?
> 
> Yes; we felt it was time to create a new, hybrid SDR with a large,
> integrated touch screen and virtually unlimited hardware/software expansion
> capability. 
> 
> The K3/K3S had a good run -- over 12 years. During that time we created many
> options and accessories and released dozens of free firmware upgrades.
> Everything we learned from that experience, plus a lot of new R, is being
> incorporated into the K4. (It's an exciting radio. For me, every morning
> it's a battle of wills to stop playing with it and get my work done :)
> 
> We're looking forward to getting the K4 into customers' hands. Our suppliers
> are coming back on line. And so are we ... but we're prioritizing the health
> of our staff, which requires some heroics from the facilities department.
> 
> 73,
> Wayne
> N6KR
> 
> 
> 
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
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Re: [Elecraft] K3s discontinued?

2020-06-16 Thread K5WA

Gary,

 

There are a good number of extremely loaded “pre-owned” K3 and K3S units 
available these days.  I’ve seen a bare bones K3 for a little as $1300 USD and 
I sold my completely loaded contesting K3s for barely over $2000 so a GREAT 
deal can be had.  It would be worth the risk of an eBay purchase to pick up one 
of these units and load it up with upgrades/accessories.   Some of the sales on 
eBay are rigs of estate sales and the seller has no clue what he is selling.  
One guy had a description of a K3 “receiver” so I asked him if the transmitter 
wasn’t working…he didn’t know it could transmit.  Maybe it couldn’t but it was 
so cheap that buying it and sending it in for repair would be very reasonable 
if I couldn’t have fixed it myself.

 

I don’t know if you have kept up with all the upgrades that were available for 
your #679 over the years but I had #234 and #5xx something that were all 
brought up to current standards.  You would need some pretty good test 
equipment to notice much of a performance difference between them and new K3S.  
They were VERY competitive and still are for someone else while I’m waiting on 
a pair of K4s to replace them. 

 

If I end up not liking my new K4s (not very likely), I always know I can sell 
them and revert back to “pre-owned” K3 models and probably make money.  .

 

Good luck,

 

Bob K5WA

 

> As one who normally does not buy unwanted used equipment, I was hoping to

> add a K3s to my current setup (K3 #679) but that appears to be out of the

> question dammit.

> 

> Gary

> 

> VK1ZZ

 

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Re: [Elecraft] K3s discontinued?

2020-06-16 Thread Charlie T

I don't understand the "shock" at the K4 pricing.

If you "load-up" a K3S with all the options you'd have to buy that are 
included in the K4,  AND add a P3,  with VGA & transmit monitor, 
 I think you'll find the K4 is a BARGAIN!

73, Charlie k3ICH

-Original Message-
From: elecraft-boun...@mailman.qth.net  On
Behalf Of Wayne Burdick
Sent: Monday, June 15, 2020 11:24 PM
To: Gary Gregory 
Cc: Elecraft Reflector 
Subject: Re: [Elecraft] K3s discontinued?

Gary, VK1ZZ, wrote:

> I was hoping to add a K3s to my current setup (K3 #679) but that 
> appears to be out of the question dammit.

Hi Gary,

We sold the last K3S, I believe, but we'll have a number of upgraded, fully
warranted K3's available for purchase on the web site sometime soon. Some
were used for DXpeditions.

> Was there a reason why the K3s was discontinued?

Yes; we felt it was time to create a new, hybrid SDR with a large,
integrated touch screen and virtually unlimited hardware/software expansion
capability. 

The K3/K3S had a good run -- over 12 years. During that time we created many
options and accessories and released dozens of free firmware upgrades.
Everything we learned from that experience, plus a lot of new R, is being
incorporated into the K4. (It's an exciting radio. For me, every morning
it's a battle of wills to stop playing with it and get my work done :)

We're looking forward to getting the K4 into customers' hands. Our suppliers
are coming back on line. And so are we ... but we're prioritizing the health
of our staff, which requires some heroics from the facilities department.

73,
Wayne
N6KR

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Re: [Elecraft] Best Audio Interfaces 2020?

2020-06-16 Thread Jim Brown

On 6/16/2020 8:06 AM, Eric KG6MZS wrote:

Interesting.  So what level do you recommend?

Sorry, forgot to finish that thought. Level should be adjusted so that 
the green bar stays in the range of 70-75 dB with the strongest signals 
filling the display, but never turning red, which indicates digital clip.

On 6/16/2020 5:17 AM, Wes wrote:
> And when I spoke of digital modes, I meant RTTY, the only one I
> seriously use.

The same concerns apply to the decoding of weak RTTY signals.

73, Jim K9YC

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Re: [Elecraft] KPA1500 Operation on 6 Meters

2020-06-16 Thread Paul Baldock


At 07:30 AM 6/16/2020, you wrote:
So, summary question for the KPA1500 amp designers: With 5 watts 
drive and the amp in STBY, the KPA1500 display reads the correct 1.3:1 SWR.



I think the designers will tell you that the SWR meter does not read 
well until you have about 20-30 watts passing through it.


Here's what mine reads in STBY, in to precision 100W dummy 
load  connected on the back of the Amp (no coax involved) at 50.1MHz.


60W 1.3
30W 1.3
24W 1.3
18W 1.2
12W 1.2
6W  1.0

Here's what mine reads in OPER, in to a "cantenna" 1000W dummy load at 50.1MHz.

106W 1.3
314W 1.3
447W 1.2
693W 1.2
1071W 1.2

You will see that the AMP SWR  meter reads 1.2-1.3 all the way from 
12W  to 1071W.
It should of  read ofcourse 1.0 in to the precision dummy load, not 
1.3. It has worked this way since being born about 2 years ago. I 
called Elecraft to ask if there was an adjustment for this, and they said no.


By the way on 29MHz in to the precision load the internal SWR meter 
reads 1.1, and then from 24.9MHz to 1.8MHz reads 1.0.


Assuming your LP100 sensor is connected directly to the back of the 
AMP (no coax involved) and always reads the same at all power levels 
then I agree your AMP has an internal problem.


Good luck

- Paul KW7Y





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Re: [Elecraft] Spurs on 6 meters on FT8

2020-06-16 Thread cbscholl

I have an older K3 ( under 3000) so I do not have the newer KPA3A. Several
yeas ago I had to replace at least one of the driver transistors. At that
time I also changed some transformers either on the driver or final board. I
do not remember without looking but the nature of the wire change was either
to or from enameled. I also recently installed gold pins because the pins
leading from the main board to the interface board to the KPA3 had
tarnished. Those are the only changes that I have made to the TX side since
it had been sent back to the factory by the prior owner. Barney K3LA



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Sent from: http://elecraft.365791.n2.nabble.com/
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Re: [Elecraft] KPA1500 Operation on 6 Meters

2020-06-16 Thread Ed G

Hi Adrian,
 Yes, I also substituted a new piece of coax of different length going 
right from the K3 to the KPA1500 input…same SWR anomaly still observed.
--Ed, N3CW—


Sent from Mail for Windows 10

From: Adrian
Sent: Tuesday, June 16, 2020 11:09 AM
To: Ed G; Larry (K8UT); elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA1500 Operation on 6 Meters

Just curious to see if you have tried a different length jumper (coax 
patch lead between radio & amp) to see if you get the same result  ?

On 17/6/20 12:09 am, Ed G wrote:
> This morning I put my DL2K dummy load right on the KPA1500 amp output (tried 
> both ANT1 and ANT2)…I am still seeing the same SWR anomaly, where lower drive 
> levels are giving high SWR readings on the KPA1500 display.  By putting the 
> dummy load right at the KPA1500 output, I eliminated a bunch of coax cables 
> and switchboxes.
>
> So at this point the issue appears to be one internal to the KPA1500.  Also 
> appears to be not related to any previously-known high power RF causes, as in 
> my case the problem is there at low drive levels and goes away at maximum 
> drive/RF out.  So I remain puzzled.
>
> --Ed, N3CW—
>
>
> Sent from Mail for Windows 10
>
> From: Larry (K8UT)
> Sent: Monday, June 15, 2020 9:33 PM
> To: ed.n...@gmail.com; elecraft@mailman.qth.net
> Subject: Re[2]: [Elecraft] KPA1500 Operation on 6 Meters
>
> Ed,
>
> Your dummy load choices at 1500 watts range from expensive and good (Bird) to 
> cheap and not-so-good. For example the MFJ-264 is listed as handling 1500 
> watts but if you read the fine print (the derating curve printed on its case 
> ) you're limited to 8 seconds at 1500 watts. And each time you stress that 
> dummy load its resistor value climbs by a few ohms.
>
> Frustrated with the commercial options available, I built a dummy load using 
> a huge heatsink from a salvage VHF transmitter and a series/parallel 
> combination of four 50 ohm 250 watt resistors purchased on eBay.
>
> https://www.ebay.com/itm/1PCS-Anaren-RFP-250-50RM-RFP250-50-RF-Power-Flanged-Resistors-250-Watts-50-ohm/133028134252?hash=item1ef9183d6c:g:uHQAAOSwyFhcvsvw
>
> -larry (K8UT)
>
> -- Original Message --
> From: "Ed G" 
> To: "Larry (K8UT)" ; "elecraft@mailman.qth.net" 
> 
> Sent: 2020-06-15 10:57:32 AM
> Subject: RE: [Elecraft] KPA1500 Operation on 6 Meters
>
> Hi Larry,
>   Yes, exact same problem is there with a known good dummy load in place 
> of the Steppir yagi I normally use.
> --Ed—
>   
>   
> Sent from Mail for Windows 10
>   
> From: Larry (K8UT)
> Sent: Monday, June 15, 2020 10:09 AM
> To: Ed G; elecraft@mailman.qth.net
> Subject: Re: [Elecraft] KPA1500 Operation on 6 Meters
>   
> Ed,
>   
> Not seeing that here. SWR value unchanged at 10, 20, 30, 35 watts of
> drive. Suggest you test into a dummy load to see if the problem goes
> away, which would suggest some issue with power level into the feedline
> or antenna.
>   
> -larry (K8UT)
>   
>   
> -- Original Message --
> From: "Ed G" 
> To: "elecraft@mailman.qth.net" 
> Sent: 2020-06-15 9:48:55 AM
> Subject: [Elecraft] KPA1500 Operation on 6 Meters
>   
>> Folks,
>>    I am trying to understand some odd KPA1500 operation on 6 meters.  
>> When setting the power output of my K3 to give varying amounts of drive to 
>> the KPA1500, I am seeing SWR as displayed on the KPA1500 changing by a 
>> significant amount depending on the drive level.  This is with the KPA1500 
>> tuner bypassed. An LP-100A on the output of the KPA1500 is also used and 
>> displays the correct low SWR at all drive levels that I would expect to be 
>> seeing on the KPA1500 display.
>>    For example, with 5 watts drive from the K3, I see 1.3 SWR on the 
>> LP-100, and 2.5:1 on the KPA1500 display.  As I increase drive, the KPA1500 
>> SWR display goes down proportionally, until I get to about 40 watts drive. 
>> At the 40 watt drive level, I am seeing a nice healthy 1600 watts output, 
>> and both the LP-100 and the KPA1500 are showing the same 1.3 SWR.  15 watts 
>> drive shows 1.3 on the LP100 and 2.0:1 on the KPA1500 display. So I am not 
>> sure why the SWR sensing and display in the KPA1500 is behaving this way?  I 
>> do not see this oddity on any other bands.
>>    I might also add that attempting to get the KPA1500 internal tuner to 
>> bring down the high SWR as seen on the KPA1500 results in a drop in SWR 
>> displayed on the KPA1500 to where SWR almost equals that on the LP-100, but 
>> using the tuner I would expect that to be even better.
>> --Ed—
>>   
>>   
>>   
>>   
>> --
>> This email has been checked for viruses by Avast antivirus software.
>> https://www.avast.com/antivirus
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>>   
>> This list hosted by: http://www.qsl.net
>> Please help support this email

Re: [Elecraft] Best Audio Interfaces 2020?

2020-06-16 Thread Eric KG6MZS

Thanks Wes.  Yes, my older iMac has an audio input and a surprisingly good 
soundcard.

The reason I need the interface now is that my newer MacBook Pro doesn’t have a 
mic jack, so an external USB device is the only practical option.  Ideally the 
USB interface would be USB-C, but I don’t think much will be lost in the 
conversion to USB A.

Thanks again to everybody who responded,
Eric, KG6MZS

> On Jun 16, 2020, at 5:17 AM, Wes  wrote:
> 
> I should have stated for KG6MZS that my computers do have audio inputs to the 
> internal cards.

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Re: [Elecraft] KPA1500 Operation on 6 Meters

2020-06-16 Thread Adrian

Just curious to see if you have tried a different length jumper (coax 
patch lead between radio & amp) to see if you get the same result  ?


On 17/6/20 12:09 am, Ed G wrote:

This morning I put my DL2K dummy load right on the KPA1500 amp output (tried 
both ANT1 and ANT2)…I am still seeing the same SWR anomaly, where lower drive 
levels are giving high SWR readings on the KPA1500 display.  By putting the 
dummy load right at the KPA1500 output, I eliminated a bunch of coax cables and 
switchboxes.

So at this point the issue appears to be one internal to the KPA1500.  Also 
appears to be not related to any previously-known high power RF causes, as in 
my case the problem is there at low drive levels and goes away at maximum 
drive/RF out.  So I remain puzzled.

--Ed, N3CW—


Sent from Mail for Windows 10

From: Larry (K8UT)
Sent: Monday, June 15, 2020 9:33 PM
To: ed.n...@gmail.com; elecraft@mailman.qth.net
Subject: Re[2]: [Elecraft] KPA1500 Operation on 6 Meters

Ed,

Your dummy load choices at 1500 watts range from expensive and good (Bird) to 
cheap and not-so-good. For example the MFJ-264 is listed as handling 1500 watts 
but if you read the fine print (the derating curve printed on its case ) you're 
limited to 8 seconds at 1500 watts. And each time you stress that dummy load 
its resistor value climbs by a few ohms.

Frustrated with the commercial options available, I built a dummy load using a 
huge heatsink from a salvage VHF transmitter and a series/parallel combination 
of four 50 ohm 250 watt resistors purchased on eBay.

https://www.ebay.com/itm/1PCS-Anaren-RFP-250-50RM-RFP250-50-RF-Power-Flanged-Resistors-250-Watts-50-ohm/133028134252?hash=item1ef9183d6c:g:uHQAAOSwyFhcvsvw

-larry (K8UT)

-- Original Message --
From: "Ed G" 
To: "Larry (K8UT)" ; "elecraft@mailman.qth.net" 

Sent: 2020-06-15 10:57:32 AM
Subject: RE: [Elecraft] KPA1500 Operation on 6 Meters

Hi Larry,
  Yes, exact same problem is there with a known good dummy load in place of 
the Steppir yagi I normally use.
--Ed—
  
  
Sent from Mail for Windows 10
  
From: Larry (K8UT)

Sent: Monday, June 15, 2020 10:09 AM
To: Ed G; elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA1500 Operation on 6 Meters
  
Ed,
  
Not seeing that here. SWR value unchanged at 10, 20, 30, 35 watts of

drive. Suggest you test into a dummy load to see if the problem goes
away, which would suggest some issue with power level into the feedline
or antenna.
  
-larry (K8UT)
  
  
-- Original Message --

From: "Ed G" 
To: "elecraft@mailman.qth.net" 
Sent: 2020-06-15 9:48:55 AM
Subject: [Elecraft] KPA1500 Operation on 6 Meters
  

Folks,
   I am trying to understand some odd KPA1500 operation on 6 meters.  When 
setting the power output of my K3 to give varying amounts of drive to the 
KPA1500, I am seeing SWR as displayed on the KPA1500 changing by a significant 
amount depending on the drive level.  This is with the KPA1500 tuner bypassed. 
An LP-100A on the output of the KPA1500 is also used and displays the correct 
low SWR at all drive levels that I would expect to be seeing on the KPA1500 
display.
   For example, with 5 watts drive from the K3, I see 1.3 SWR on the 
LP-100, and 2.5:1 on the KPA1500 display.  As I increase drive, the KPA1500 SWR 
display goes down proportionally, until I get to about 40 watts drive. At the 
40 watt drive level, I am seeing a nice healthy 1600 watts output, and both the 
LP-100 and the KPA1500 are showing the same 1.3 SWR.  15 watts drive shows 1.3 
on the LP100 and 2.0:1 on the KPA1500 display. So I am not sure why the SWR 
sensing and display in the KPA1500 is behaving this way?  I do not see this 
oddity on any other bands.
   I might also add that attempting to get the KPA1500 internal tuner to 
bring down the high SWR as seen on the KPA1500 results in a drop in SWR 
displayed on the KPA1500 to where SWR almost equals that on the LP-100, but 
using the tuner I would expect that to be even better.
--Ed—
  
  
  
  
--

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Home:

Re: [Elecraft] Best Audio Interfaces 2020?

2020-06-16 Thread Eric KG6MZS

Interesting.  So what level do you recommend?

It looks like I am able to pick up a used ASUS Xonar U5.

Thanks for the replies everybody,
Eric KG6MZS

> On Jun 15, 2020, at 8:51 PM, Jim Brown  wrote:
> 
> One thing I differ with in the WSJT-X instructions is to set band noise to 30 
> dB on the green voltmeter bar. That's fine for modes like MSK144 and ISCAT B, 
> but gives up FAR too much dynamic range for modes like FT8, FT4, JT65, and 
> JT9.

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[Elecraft] FW: KPA1500 Operation on 6 Meters

2020-06-16 Thread Dr. William J. Schmidt

It may be more efficient for you to contact Rene (the KPA1500 support guy) at 
Elecraft and discuss this with him... ???  I doubt anyone in the forum has seen 
the schematics or was involved it its development to the point where they could 
help you.


-Original Message-
From: elecraft-boun...@mailman.qth.net 
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ed G
Sent: Tuesday, June 16, 2020 9:30 AM
To: Larry (K8UT) ; elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA1500 Operation on 6 Meters

So, summary question for the KPA1500 amp designers:

With 5 watts drive and the amp in STBY, the KPA1500 display reads the correct 
1.3:1 SWR.  When I switch the amp to OPER, SWR reads 2.5:1 with the same 5 
watts drive.  All hardware/cabling outside the KPA1500 remains the same for 
each case. Reminder that this anomaly is seen only on 6 meters; other bands are 
fine.  BTW power out with 5 watts drive is about 150 watts, and internal 
KPA1500 tuner is bypassed.

What is different inside the KPA1500 as to how the SWR is sensed and displayed 
between STBY and OPER?

--Ed, N3CW—


Sent from Mail for Windows 10

From: Larry (K8UT)
Sent: Monday, June 15, 2020 9:33 PM
To: ed.n...@gmail.com; elecraft@mailman.qth.net
Subject: Re[2]: [Elecraft] KPA1500 Operation on 6 Meters

Ed,

Your dummy load choices at 1500 watts range from expensive and good (Bird) to 
cheap and not-so-good. For example the MFJ-264 is listed as handling 1500 watts 
but if you read the fine print (the derating curve printed on its case ) you're 
limited to 8 seconds at 1500 watts. And each time you stress that dummy load 
its resistor value climbs by a few ohms.

Frustrated with the commercial options available, I built a dummy load using a 
huge heatsink from a salvage VHF transmitter and a series/parallel combination 
of four 50 ohm 250 watt resistors purchased on eBay.

https://www.ebay.com/itm/1PCS-Anaren-RFP-250-50RM-RFP250-50-RF-Power-Flanged-Resistors-250-Watts-50-ohm/133028134252?hash=item1ef9183d6c:g:uHQAAOSwyFhcvsvw

-larry (K8UT)

-- Original Message --
From: "Ed G" 
To: "Larry (K8UT)" ; "elecraft@mailman.qth.net" 

Sent: 2020-06-15 10:57:32 AM
Subject: RE: [Elecraft] KPA1500 Operation on 6 Meters

Hi Larry,
 Yes, exact same problem is there with a known good dummy load in place of 
the Steppir yagi I normally use.
--Ed—
 
 
Sent from Mail for Windows 10
 
From: Larry (K8UT)
Sent: Monday, June 15, 2020 10:09 AM
To: Ed G; elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA1500 Operation on 6 Meters
 
Ed,
 
Not seeing that here. SWR value unchanged at 10, 20, 30, 35 watts of drive. 
Suggest you test into a dummy load to see if the problem goes away, which would 
suggest some issue with power level into the feedline or antenna.
 
-larry (K8UT)
 
 
-- Original Message --
From: "Ed G" 
To: "elecraft@mailman.qth.net" 
Sent: 2020-06-15 9:48:55 AM
Subject: [Elecraft] KPA1500 Operation on 6 Meters
 
>Folks,
>  I am trying to understand some odd KPA1500 operation on 6 meters.  When 
> setting the power output of my K3 to give varying amounts of drive to the 
> KPA1500, I am seeing SWR as displayed on the KPA1500 changing by a 
> significant amount depending on the drive level.  This is with the KPA1500 
> tuner bypassed. An LP-100A on the output of the KPA1500 is also used and 
> displays the correct low SWR at all drive levels that I would expect to be 
> seeing on the KPA1500 display.
>  For example, with 5 watts drive from the K3, I see 1.3 SWR on the 
> LP-100, and 2.5:1 on the KPA1500 display.  As I increase drive, the KPA1500 
> SWR display goes down proportionally, until I get to about 40 watts drive. At 
> the 40 watt drive level, I am seeing a nice healthy 1600 watts output, and 
> both the LP-100 and the KPA1500 are showing the same 1.3 SWR.  15 watts drive 
> shows 1.3 on the LP100 and 2.0:1 on the KPA1500 display. So I am not sure why 
> the SWR sensing and display in the KPA1500 is behaving this way?  I do not 
> see this oddity on any other bands.
>  I might also add that attempting to get the KPA1500 internal tuner to 
> bring down the high SWR as seen on the KPA1500 results in a drop in SWR 
> displayed on the KPA1500 to where SWR almost equals that on the LP-100, but 
> using the tuner I would expect that to be even better.
>--Ed—
> 
> 
> 
> 
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Re: [Elecraft] KPA1500 Operation on 6 Meters

2020-06-16 Thread Ed G

So, summary question for the KPA1500 amp designers:

With 5 watts drive and the amp in STBY, the KPA1500 display reads the correct 
1.3:1 SWR.  When I switch the amp to OPER, SWR reads 2.5:1 with the same 5 
watts drive.  All hardware/cabling outside the KPA1500 remains the same for 
each case. Reminder that this anomaly is seen only on 6 meters; other bands are 
fine.  BTW power out with 5 watts drive is about 150 watts, and internal 
KPA1500 tuner is bypassed.

What is different inside the KPA1500 as to how the SWR is sensed and displayed 
between STBY and OPER?

--Ed, N3CW—


Sent from Mail for Windows 10

From: Larry (K8UT)
Sent: Monday, June 15, 2020 9:33 PM
To: ed.n...@gmail.com; elecraft@mailman.qth.net
Subject: Re[2]: [Elecraft] KPA1500 Operation on 6 Meters

Ed,

Your dummy load choices at 1500 watts range from expensive and good (Bird) to 
cheap and not-so-good. For example the MFJ-264 is listed as handling 1500 watts 
but if you read the fine print (the derating curve printed on its case ) you're 
limited to 8 seconds at 1500 watts. And each time you stress that dummy load 
its resistor value climbs by a few ohms.

Frustrated with the commercial options available, I built a dummy load using a 
huge heatsink from a salvage VHF transmitter and a series/parallel combination 
of four 50 ohm 250 watt resistors purchased on eBay.

https://www.ebay.com/itm/1PCS-Anaren-RFP-250-50RM-RFP250-50-RF-Power-Flanged-Resistors-250-Watts-50-ohm/133028134252?hash=item1ef9183d6c:g:uHQAAOSwyFhcvsvw

-larry (K8UT)

-- Original Message --
From: "Ed G" 
To: "Larry (K8UT)" ; "elecraft@mailman.qth.net" 

Sent: 2020-06-15 10:57:32 AM
Subject: RE: [Elecraft] KPA1500 Operation on 6 Meters

Hi Larry,
 Yes, exact same problem is there with a known good dummy load in place of 
the Steppir yagi I normally use.
--Ed—
 
 
Sent from Mail for Windows 10
 
From: Larry (K8UT)
Sent: Monday, June 15, 2020 10:09 AM
To: Ed G; elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA1500 Operation on 6 Meters
 
Ed,
 
Not seeing that here. SWR value unchanged at 10, 20, 30, 35 watts of 
drive. Suggest you test into a dummy load to see if the problem goes 
away, which would suggest some issue with power level into the feedline 
or antenna.
 
-larry (K8UT)
 
 
-- Original Message --
From: "Ed G" 
To: "elecraft@mailman.qth.net" 
Sent: 2020-06-15 9:48:55 AM
Subject: [Elecraft] KPA1500 Operation on 6 Meters
 
>Folks,
>  I am trying to understand some odd KPA1500 operation on 6 meters.  When 
>setting the power output of my K3 to give varying amounts of drive to the 
>KPA1500, I am seeing SWR as displayed on the KPA1500 changing by a significant 
>amount depending on the drive level.  This is with the KPA1500 tuner bypassed. 
>An LP-100A on the output of the KPA1500 is also used and displays the correct 
>low SWR at all drive levels that I would expect to be seeing on the KPA1500 
>display.
>  For example, with 5 watts drive from the K3, I see 1.3 SWR on the 
>LP-100, and 2.5:1 on the KPA1500 display.  As I increase drive, the KPA1500 
>SWR display goes down proportionally, until I get to about 40 watts drive. At 
>the 40 watt drive level, I am seeing a nice healthy 1600 watts output, and 
>both the LP-100 and the KPA1500 are showing the same 1.3 SWR.  15 watts drive 
>shows 1.3 on the LP100 and 2.0:1 on the KPA1500 display. So I am not sure why 
>the SWR sensing and display in the KPA1500 is behaving this way?  I do not see 
>this oddity on any other bands.
>  I might also add that attempting to get the KPA1500 internal tuner to 
>bring down the high SWR as seen on the KPA1500 results in a drop in SWR 
>displayed on the KPA1500 to where SWR almost equals that on the LP-100, but 
>using the tuner I would expect that to be even better.
>--Ed—
> 
> 
> 
> 
>--
>This email has been checked for viruses by Avast antivirus software.
>https://www.avast.com/antivirus
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>Elecraft mailing list
>Home: http://mailman.qth.net/mailman/listinfo/elecraft
>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 k...@charter.net
 


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Re: [Elecraft] KPA1500 Operation on 6 Meters

2020-06-16 Thread Ed G

This morning I put my DL2K dummy load right on the KPA1500 amp output (tried 
both ANT1 and ANT2)…I am still seeing the same SWR anomaly, where lower drive 
levels are giving high SWR readings on the KPA1500 display.  By putting the 
dummy load right at the KPA1500 output, I eliminated a bunch of coax cables and 
switchboxes.  

So at this point the issue appears to be one internal to the KPA1500.  Also 
appears to be not related to any previously-known high power RF causes, as in 
my case the problem is there at low drive levels and goes away at maximum 
drive/RF out.  So I remain puzzled.

--Ed, N3CW—


Sent from Mail for Windows 10

From: Larry (K8UT)
Sent: Monday, June 15, 2020 9:33 PM
To: ed.n...@gmail.com; elecraft@mailman.qth.net
Subject: Re[2]: [Elecraft] KPA1500 Operation on 6 Meters

Ed,

Your dummy load choices at 1500 watts range from expensive and good (Bird) to 
cheap and not-so-good. For example the MFJ-264 is listed as handling 1500 watts 
but if you read the fine print (the derating curve printed on its case ) you're 
limited to 8 seconds at 1500 watts. And each time you stress that dummy load 
its resistor value climbs by a few ohms.

Frustrated with the commercial options available, I built a dummy load using a 
huge heatsink from a salvage VHF transmitter and a series/parallel combination 
of four 50 ohm 250 watt resistors purchased on eBay.

https://www.ebay.com/itm/1PCS-Anaren-RFP-250-50RM-RFP250-50-RF-Power-Flanged-Resistors-250-Watts-50-ohm/133028134252?hash=item1ef9183d6c:g:uHQAAOSwyFhcvsvw

-larry (K8UT)

-- Original Message --
From: "Ed G" 
To: "Larry (K8UT)" ; "elecraft@mailman.qth.net" 

Sent: 2020-06-15 10:57:32 AM
Subject: RE: [Elecraft] KPA1500 Operation on 6 Meters

Hi Larry,
 Yes, exact same problem is there with a known good dummy load in place of 
the Steppir yagi I normally use.
--Ed—
 
 
Sent from Mail for Windows 10
 
From: Larry (K8UT)
Sent: Monday, June 15, 2020 10:09 AM
To: Ed G; elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA1500 Operation on 6 Meters
 
Ed,
 
Not seeing that here. SWR value unchanged at 10, 20, 30, 35 watts of 
drive. Suggest you test into a dummy load to see if the problem goes 
away, which would suggest some issue with power level into the feedline 
or antenna.
 
-larry (K8UT)
 
 
-- Original Message --
From: "Ed G" 
To: "elecraft@mailman.qth.net" 
Sent: 2020-06-15 9:48:55 AM
Subject: [Elecraft] KPA1500 Operation on 6 Meters
 
>Folks,
>  I am trying to understand some odd KPA1500 operation on 6 meters.  When 
>setting the power output of my K3 to give varying amounts of drive to the 
>KPA1500, I am seeing SWR as displayed on the KPA1500 changing by a significant 
>amount depending on the drive level.  This is with the KPA1500 tuner bypassed. 
>An LP-100A on the output of the KPA1500 is also used and displays the correct 
>low SWR at all drive levels that I would expect to be seeing on the KPA1500 
>display.
>  For example, with 5 watts drive from the K3, I see 1.3 SWR on the 
>LP-100, and 2.5:1 on the KPA1500 display.  As I increase drive, the KPA1500 
>SWR display goes down proportionally, until I get to about 40 watts drive. At 
>the 40 watt drive level, I am seeing a nice healthy 1600 watts output, and 
>both the LP-100 and the KPA1500 are showing the same 1.3 SWR.  15 watts drive 
>shows 1.3 on the LP100 and 2.0:1 on the KPA1500 display. So I am not sure why 
>the SWR sensing and display in the KPA1500 is behaving this way?  I do not see 
>this oddity on any other bands.
>  I might also add that attempting to get the KPA1500 internal tuner to 
>bring down the high SWR as seen on the KPA1500 results in a drop in SWR 
>displayed on the KPA1500 to where SWR almost equals that on the LP-100, but 
>using the tuner I would expect that to be even better.
>--Ed—
> 
> 
> 
> 
>--
>This email has been checked for viruses by Avast antivirus software.
>https://www.avast.com/antivirus
>__
>Elecraft mailing list
>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 k...@charter.net
 


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Re: [Elecraft] Best Audio Interfaces 2020?

2020-06-16 Thread Wes

I should have stated for KG6MZS that my computers do have audio inputs to the 
internal cards.


And when I spoke of digital modes, I meant RTTY, the only one I seriously use.

Wes  N7WS


On 6/15/2020 8:51 PM, Jim Brown wrote:

On 6/15/2020 4:55 PM, Wes wrote:

OK  QSL.

All of my computers have soundcards including the, soon to be replaced, shack 
Lenovo laptop. I tried a TASCAM US-100, highly recommended by K9YC, without 
seeing any improvement over the Lenovo on digital modes.


Hi Wes,

You might want to look at the piece I wrote on the topic, which details my 
testing. It was pretty rigorous. The USB interfaces I recommended were equally 
good, decoded to much greater signal to noise levels, and produced almost 
twice as many decodes as the sound system built into the two T43 Thinkpads 
used for the tests.


Pulling out the weakest signals requires a lot of dynamic range if very strong 
signals are present, and cheap A/D converters can have poor linearity close to 
the low end of the dynamic range. WSJT-X uses 48 kHz 16-bit, theoretical 96 
dB, real life more like 90. It's not unusual for there to be locals 30-50 dB 
over S9 when the band is open, so every little bit of dynamic range can matter 
when you're trying to work the weak ones. All of this is why I started my 
search in the semi-pro audio world.


One thing I differ with in the WSJT-X instructions is to set band noise to 30 
dB on the green voltmeter bar. That's fine for modes like MSK144 and ISCAT B, 
but gives up FAR too much dynamic range for modes like FT8, FT4, JT65, and JT9.


73, Jim K9YC 


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