Re: [Elecraft] KPA500/K3 AUX bus specification

[Bob Wilson, N6TV]

Bill,

The Y-BOX v2.1 and single $20 25ft M/F "HD15" cable could let you remote
the KPA1500 or KPA500 to the garage quite nicely, including remote power
power on/off via a K3 macro.  I haven't tested a cable that long, but know
of no reason that it won't work as long as the voltage drop isn't
significant.   Maybe a pair of these high quality cables in series would
work too (50 ft)?

See:

http://www.kkn.net/~n6tv/Y-BOX/Features.html#Remote

and

http://www.cablesondemand.com/category/HD15/product/CS-DSDHD15MF0/URvars/Items/Library/InfoManage/CS-DSDHD15MF0.htm

73,
Bob, N6TV
https://bit.ly/Y-BOX

On Mon, Apr 30, 2018, 6:29 AM Bill Frantz  wrote:

> I agree with Jim here. I am thinking of getting a KPA1500 to
> replace my Expert 1.3K. (I got the 1.3K after my wife won a
> $1000 off prize at the Top Band Dinner. I thought the 1.3K would
> have good resale value given its use on DXpeditions.)
>
> The logical place for the amp is in my garage, near the antennas
> feed points and near an electrical subpanel with 60A 240V
> service. Installing the 240 outlet in the garage is probably a
> DIY project.
>
> I do want the tight integration of the amp with the K3, so an
> AUX bus connection is required.
>
> 73 Bill AE6JV
>
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[Elecraft] KPA1500 s/n 122

[Rick Bates (WA6NHC)]

Has arrived home safely.  However since I just returned from 10 days of travel, 
including 3300 road miles (in part to collect a SteppIR DB42 and a 55’ tower), 
it’ll have to wait for a couple days. 

Purchase time was: 24 Aug @ 23:59, processed 25 Aug @ 2:00 AM, payment cleared 
30 Aug. 

Rick WA6NHC

Smell Czech correction happen
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[Elecraft] K2 Twins for sale

[Andy Yates]

K2/10 Serial # 3009 with:
    KSB2, K160RX, KNB2, KAT2
    KIO2, KDSP2, MH2 mic
    latest firmware
    K2 Keying Modification done
    K2 Temperature Compensated PLL mod
    zero beat indicator(right most LED of rf/swr meter)

KPA100/KAT100 in EC2 case

All manuals and a bunch of
assorted extra parts

$1175.00 shipped and insured

Andy - W4KIL

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Re: [Elecraft] CW AGC settings

[Don Wilhelm]

Marv,

You are quite welcome.

If any of you do not know what we are referring to, go to my website 
www.w3fpr.com and in the left column, click on the "Noisy K3" article. 
It will give you guidelines for adjusting the K3/K3S AGC parameters to 
better suit your operating preferences.  The default settings are OK, 
but are not optimum for every operating style and noise environment.


73,
Don W3FPR

On 4/30/2018 8:24 PM, marvwhee...@nwlink.com wrote:

Don:

  


If I ever meet you I owe you a donut and coffee or if you prefer a steak.

  


I read the reference to your article regarding the AGC settings on the K3. I
thought I was just living in a very noisy place but after using your article
as a guideline I made some changes as you suggested, including turning on he
attenuator, and I am hearing the weak, weak CW signals well enough to work
them. Before I could tell they were there but was unable to copy. I will be
interesting to see if it helps with Kevin on his CW net next Sunday.

  


Thanks you very much SIR!

  


73

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Re: [Elecraft] CW AGC settings

[marvwheeler]

Don:

 

If I ever meet you I owe you a donut and coffee or if you prefer a steak.

 

I read the reference to your article regarding the AGC settings on the K3. I
thought I was just living in a very noisy place but after using your article
as a guideline I made some changes as you suggested, including turning on he
attenuator, and I am hearing the weak, weak CW signals well enough to work
them. Before I could tell they were there but was unable to copy. I will be
interesting to see if it helps with Kevin on his CW net next Sunday.

 

Thanks you very much SIR!

 

73

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Re: [Elecraft] CW AGC settings

[Bill Stravinsky via Elecraft]

 Don, I just read your article to see what the hubbub was about with AGC.  I 
live in a rural area in the woods so noise is really not a  problem.
I was taught a long time ago to keep the AGC off for weak signal reception and 
it stuck with me.  Those were the S line days.  And in your
article you mention ops that can copy into the noise and that certainly 
describes me, hi.  Its kind of an ESP thing.

Thanks for all your valuable info here on the reflector.

Bill
K3WJV

On Thursday, April 26, 2018, 5:25:37 PM EDT, Don Wilhelm 
 wrote:  
 
 Thank you Mike for mentioning that article.

Yes, adjusting your AGC Threshold and Slope is preferable to running 
with AGC off.

Fortunately, the K3/K3S has an adjustable limiter to help protect the 
ears for those operators who would still choose to run with AGC off.

73,
Don W3FPR

On 4/26/2018 4:44 PM, Mike K8CN wrote:
> Don, W3FPR wrote a succinct tutorial about AGC settings on his web page
> www.w3fpr.com under the title "Noisy" K3.  I had left my AGC settings for CW
> contesting at the default values until reading Don's guidance, and once I
> reset the AGC threshold and slope parameters I had much better CW contesting
> experiences.
> 
> Mike, K8CN
> 
> 
> 
> --
> Sent from: http://elecraft.365791.n2.nabble.com/
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[Elecraft] KPA1500 Serial #112 Delivered

[Mark E. Musick]

Hello Everyone,

Those wanting updates on KPA1500 orders and deliveries, mine was delivered
today at 1:00 PM EDT via UPS and was shipped on April 24th. Serial #112.

The order date was 8/25/2017 3:12:00 PM PDT about 20 hours into the preorder
period.

It is out of the box and everything looks fine physically.

When I get it hooked up, tested into the dummy load and then into the
antenna system, I'll send a post on how it is working.

 

73,

Mark, WB9CIF

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Re: [Elecraft] FW: KPA1500 SWR meter

[Don Wilhelm]

Mike,

I have never had my hands on the innards of the KPA1500, so I can't 
offer much except for you to email supp...@elecraft.com.


73,
Don W3FPR

On 4/30/2018 1:45 PM, a...@gvtc.com wrote:

Don,

I downloaded the utility and SWR displayed stayed the same, 1.1:1 while the
display on the KPA1500 peaked at 2 to 1, one red light. This occurs around
60C. No problem until then.


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[Elecraft] K3/0 in need

[Jim Blanca]

Hi All,
I have an acquaintance, K8ZH - Rick, who is getting into remote operation.
He has the RemoteRig units, but is currently looking for a K3/0 for the
control station.

If anyone has a spare or unused K3/0 collecting dust, please let me know,
so I can pass the information on to him.

73 de Jim - KE8G
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[Elecraft] FW: KPA1500 SWR meter

[ad5a]

Don,

I downloaded the utility and SWR displayed stayed the same, 1.1:1 while the
display on the KPA1500 peaked at 2 to 1, one red light. This occurs around
60C. No problem until then.

73,

Mike AD5A

-Original Message-
From: Don Wilhelm 
Sent: Sunday, April 29, 2018 2:28 PM
To: Mike Crownover ; Mike Crownover
; elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA1500 SWR meter

Mike,

Have you looked at the SWR report shown in KPA1500 Utility?
Try that and see whether it shows the same as the display.

There are 2 pieces to the SWR - there is the sensor part and then there is
the display part.
There is a possibility that the sensor is doing OK, but the display end of
things may be what is causing the problem.  KPA1500 Utility uses a different
path (but the same sensor) for its display of SWR than the front panel
display.

In either case, it does seem (by my first guess) that there is a solder or
cable connection in the KPA1500 that is heat sensitive.

How high does the SWR go?  If it stays below 1.5, it will cause no problem
despite your concern for that behavior.

Unless I am mistaken, the SWR indication on the K3 shows only the SWR of
what is connected to the K3, which is the amplifier input

73,
Don W3FPR

On 4/29/2018 2:25 PM, Mike Crownover wrote:
> Don,
>
> Thanks for the comment. I’ve done that test and at low temps,~35c, no 
> difference at 1500 or 500. I haven’t done it at high temps yet, but I 
> would think if it were arcing, the temp of the amp wouldn’t matter, 
> although I’m certainly no expert on these matters. Additionally, I 
> would expect the SWR indicator on the screen to show the fluctuation 
> as well. It never moves from 1.1:1.
>
> Mike AD5A
>



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Re: [Elecraft] FS - K2 belonging to WB3AAL (SK)

[Don Wilhelm]

I believe Ron's K2 has been sold.
The buyer is sending a check direct to the widow.
I will ship it when she confirms that the check was received.

73,
Don W3FPR

On 4/29/2018 6:07 PM, Don Wilhelm wrote:

Hello All,

It is with deep regret that I heard of the passing of Ron Polytika WB3AAL.

About a week before he passed, he sent his K2 to me to install one of 
his K6XX CW Tuning indicators.  Unfortunately, he passed away before I 
could get to it.


I talked with Susan (Ron's XYL) this afternoon, and we agreed that I 
should try to sell Ron's K2/10.  She offered to give me a share of the 
proceeds, but I will not, the full proceeds minus shipping costs will go 
to the widow.


This is K2/10 SN 1392.  It has the K160RX, KNB2, KSB2 and KAT2 options 
installed.  It also has the 73CNC VFO knob installed.
The BFOMDKT and Thermistor Mod have been installed, but no other upgrade 
mods have been done.  The firmware level is 2.01MCU and 1.02 KIOC.

The unbuilt K6XX CW Tuning kit with button LED is also part of the package.

I believe a decent asking price for this package is $500.00 including 
shipping to any QTH with a US shipping address.  International shipment 
will be at additional cost.


I will checkout this K2 and do an alignment and calibration at no extra 
cost to assure you that you are buying a fully functional K2/10.


I can also upgrade it to the current level and/or build and install the 
K6XX CW Tuning Indicator (at extra cost) if you desire.


Please respond directly to me at d...@w3fpr.com if you are interested or 
have additional questions.


73,
Don W3FPR
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Re: [Elecraft] Reminder: Most Elecraft rigs can scan "dead" bands for signals

[Keith Trinity WE6R]

Hi Drew;
That sounds cool. Can you post your Macro strings please? That would 
save me some time.

Thanks! Keith WE6R
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Re: [Elecraft] KPA3 removal

[Keith Trinity WE6R]

Hi Martin;
No need to remove the KPA3 to test the LPA, just set KPA3 to "not inSt" 
in the config menu.

Then you can go to 12W and go thru the bands and see how it does.
Also you can run the 5W TX gain cal using the K3 Utility (or TUNE at 
exactly 5.0W on all bands) to see what happens. The resulting "TXGN LP" 
numbers are typically below 60, higher numbers indicate something wrong, 
or you may get an ERR TXG. Go to config menu item "TXGN LP", then step 
thru the bands to see each one. Or just get the results using the K3 
Utility.


On the older LPAs like yours, R18 is for Q2, the _*D*_*_river._* It is a 
different device than the two finals, Q5 (R19) and Q4 (R24).
I believe the Bias increase is 300ma for each device, please contact 
support@elecraft for the procedure on this older LPA.

Keith WE6R

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Re: [Elecraft] Odd problem

[Keith Trinity WE6R]

Hi Steve;
Your FPF, Front Panel Flash, is corrupt.
Confirm by going to Config Menu "XV1 ON", then tap 1 thru 9 and you will 
probably see a transverter (usually 9) set to "YES" when you have none.

Set all to "no" (unless you have one).

Then RE-load just the FPF with the K3 Utility.
Keith WE6R


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Re: [Elecraft] KPA500/K3 AUX bus specification

[Bill Frantz]

I agree with Jim here. I am thinking of getting a KPA1500 to 
replace my Expert 1.3K. (I got the 1.3K after my wife won a 
$1000 off prize at the Top Band Dinner. I thought the 1.3K would 
have good resale value given its use on DXpeditions.)


The logical place for the amp is in my garage, near the antennas 
feed points and near an electrical subpanel with 60A 240V 
service. Installing the 240 outlet in the garage is probably a 
DIY project.


I do want the tight integration of the amp with the K3, so an 
AUX bus connection is required.


73 Bill AE6JV

On 4/30/18 at 12:22 AM, j...@audiosystemsgroup.com (Jim Brown) wrote:

It DOES seem reasonable to publish at least an electrical 
transmission spec for it -- i.e., voltages, source and load 
impedances, whether it is intended to be terminated (impedance 
matched) or un-terminated, distance limits for various cable 
parameters. In fact, it seems unreasonable to NOT put it in the 
manual ...


---
Bill Frantz| Since the IBM Selectric, keyboards have gotten
408-356-8506   | steadily worse. Now we have touchscreen keyboards.
www.pwpconsult.com | Can we make something even worse?

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[Elecraft] K3S for Sale

[Tom Robertson]

Price reduced to $3400

Excellent Condition. K3S Factory Assembled includes options listed below, 
purchased new Jan 2017- $3400

KPA3A 100 Watt upgrade

KAT3AAntennaa tuner

KFL3A 2.8kHZ filter

KBPF3A General coverage receiver

KFl3A-250-IR 250hz 8 pole filter

KFL3A-400-IR 400 hz 8 pole filter

KRx3A -2nd Receiver - No additional filters

KPAK3AUX KPA to K3 Aux cable

Heil HMM hand mic

$3400 includes shipping. Payment via PayPal. US Only.


Tom-KQ5S

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Re: [Elecraft] KPA1500 Utility Setup

[N2TK, Tony]

That was it. The firewall settings blocked it. Tnx for all the input. It is
now installed and working.
73,
N2TK, Tony

-Original Message-
From: Bill Johnson [mailto:k9...@live.com] 
Sent: Sunday, April 29, 2018 6:28 PM
To: N2TK, Tony ; Elecraft@mailman.qth.net
Subject: RE: [Elecraft] KPA1500 Utility Setup

You may have the firewall settings high enough that the programs require:
either 1) run as an administrator or, 2) allow the program through your
firewall since these are all "*.exe" programs which are generally highly
suspect on the internet and blocked, unless you give specific permissions.  

73,
Bill
K9YEQ

https://wrj-tech.com/

-Original Message-
From: elecraft-boun...@mailman.qth.net  On
Behalf Of N2TK, Tony
Sent: Sunday, April 29, 2018 5:05 PM
To: Elecraft@mailman.qth.net
Subject: [Elecraft] KPA1500 Utility Setup

When I try to install the "KPA1500 Utility Setup 1-18-3-15" I get a message
that "This app can't run on your PC. To find a version for your PC, check
with the software publisher"

 

The PC is a i7, 64-bit operating system running Win 10 Pro.

What am I missing or doing wrong? Did I miss something in the archives?

Tnx

N2TK, Tony  

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Re: [Elecraft] KPA500/K3 AUX bus specification

[David Woolley]

You would need to sign a non-disclosure agreement for anything beyond 
the logic level (TTL) and pinout information.  I've never heard of one 
being given out for this purpose.


--
David Woolley
Owner K2 06123

On 29/04/18 21:59, ANDY DURBIN wrote:

Can someone please point me to a definition or specification for the KPA500 - 
K3 AUX Bus.   I have the KPA500 Programmer's Reference but this appears to only 
cover the KPA500 - PC interface.


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Re: [Elecraft] KPA500/K3 AUX bus specification

[Jim Brown]

On 4/29/2018 8:27 PM, Wayne Burdick wrote:

philosophical, or metaphysical questions


How appropriate on a Sunday night!

73, Jim

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Re: [Elecraft] KPA500/K3 AUX bus specification

[Jim Brown]

On 4/29/2018 2:45 PM, Don Wilhelm wrote:

The AUXBUS protocol is Elecraft proprietary and is not published.
It is the single wire communications between the K3 and its options, 
both internal and external. 


It DOES seem reasonable to publish at least an electrical transmission 
spec for it -- i.e., voltages, source and load impedances, whether it is 
intended to be terminated (impedance matched) or un-terminated, distance 
limits for various cable parameters. In fact, it seems unreasonable to 
NOT put it in the manual RS232, for example, is runs UN-terminated, and 
the limit on distance is the capacitance of the cable, not it's physical 
length. Many years ago, the RS232 spec was note that capacitance was the 
limitation.


The way to think about this is that UN-terminated circuits are analyzed 
as "lumped parameter" systems, where bandwidth limits boil down to 
degradation of rise time by RC time constants. The source Z is low, the 
receiving Z is high. TERMINATED systems function as transmission lines, 
and everything we know about traansmission lines applies.


I'm using only the AUX Bus for communication between K3 and KRC2, using 
a short length of mini Belden 75 ohm coax. If I were, for example, 
remoting a KPA500 or KPA1500, it  would be nice to run only coax (or a 
single pair out of CAT5) for that bus, which requires that you know the 
electrical limits of the circuit.


73, Jim K9YC

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Re: [Elecraft] KPA500/K3 AUX bus specification

[Matthew Cook]

Andy,

You'll find the band outputs on the KPA500 aux connector (BAND0-3) are
quite reliable and fast when it comes to detecting band change outputs.
They appear to be flipped/set quite early in the band change
sequence/exchange between the K3 and amp, certainly before RF is applied
(yay !).   At least I've not caught my K3/KPA500(s) doing anything silly in
this regard yet.

My only gripe with the BAND outputs is that 60m was encoded as  and not
 on this 4-bit interface, which means telling the difference between
the amp being physically OFF and/or on 60m requires a separate monitoring
circuit...  >:|

73

Matthew
VK5ZM

On 30 April 2018 at 09:07, ANDY DURBIN  wrote:

> Don,
>
>
> Thanks for the reply.
>
>
> I'm familiar with the PC interface and have, in the hope of tracking down
> a problem, built a logger that uses that bus to interrogate the KPA500 at
> 10 Hz.  I was hoping the AUX bus would give a faster detection of a
> spurious band change than my 10 Hz interrogation ^bn;.   I'll look at the
> bus with my DSO but I have already been given information than suggests its
> data rate will be too low to be useful.
>
>
> I may have to resort to instrumenting the shift register signals from the
> front panel to the LPF but I was hoping to avoid that.
>
>
> 73,
>
> Andy
>
>
>
>
> 
> From: Don Wilhelm 
> Sent: Sunday, April 29, 2018 2:45 PM
> To: ANDY DURBIN; elecraft@mailman.qth.net
> Subject: Re: [Elecraft] KPA500/K3 AUX bus specification
>
> The AUXBUS protocol is Elecraft proprietary and is not published.
> It is the single wire communications between the K3 and its options,
> both internal and external.
>
> The K3 Programmers Reference and KPA500 Programmers Reference gives you
> commands that can be issued from a PC or other connected computer -
> those commands are quite extensive and can give you complete control
> from a PC.
>
> 73,
> Don W3FPR
>
>
> > From: elecraft-boun...@mailman.qth.net [elecraft-boun...@mailman.qth.net]
> on behalf of ANDY DURBIN [a.dur...@msn.com]
> > Sent: Sunday, April 29, 2018 3:59 PM
> > To: elecraft@mailman.qth.net
> > Subject: [Elecraft] KPA500/K3 AUX bus specification
> >
> > Can someone please point me to a definition or specification for the
> KPA500 - K3 AUX Bus.   I have the KPA500 Programmer's Reference but this
> appears to only cover the KPA500 - PC interface.
> __
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