Re: [Elecraft] When Transmitting on FT8 - KPA500 has issues - KD8ZYD

[Don Wilhelm]

Andy,

That appears to be a TS-590/HDSDR problem and not a KPA500 problem.
You can likely get more support from th TS-590 and HDSDR forums than 
from us on the Elecraft reflector.


73,
Don W3FPR

On 7/2/2019 10:19 PM, Andy Durbin wrote:

"In my case HDSDR sound output had spontaneously changed to TS-590 TX CODEC 
creating a feedback loop through
the PC.  Break the loop and all is normal.

– Question, how do you break the loop?"


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Re: [Elecraft] The ERR 12V Message Question

[Bob McGraw K4TAX]

First, check all power connections.   And if your radio is powered 
through a DC distribution strip, my suggestion is to not use the strip 
for the radio power.   In other words, connect the radio power cable 
direct to the power supply.    Also shorten the power cable to be more 
convenient and have less voltage drop. It is a law of physics;   more 
wire, more connections = more resistance = more voltage drop for a given 
value of current.  Thus Ohms law  is E = I x R    {Those power 
distribution blocks are most often very problematic, regardless of what 
the advertising, or rating,  or sales person said.}


As to 10 watts, there is a K3/10 model which is a 10 watt radio. 
However, like the 100 watt version it should not be run at 100% power or 
otherwise 10 watts for FT-8 for a 10 watt radio.   When you turn the PWR 
back to 12 watts or so with a 100 watt radio, you will hear a relay 
click.  This is the switching of the KPA3 {100 watt amp} out of the 
circuit and then LPA is used as the PA.   It is rated for 10 watts.  I 
wouldn't suggesting running it at 10 watts no more than I would suggest 
running the KPA3 at 100 watts in the FT-8 mode.   About 50% rated power 
is a safe value.


As suggestion, remove the covers and remove the KPA3, examine and clean 
the power connectors and put it back in the radio.  This might solve the 
issue and be good for another few months.   Of course replacement of the 
power connectors is preferred for long term service.


73

Bob, K4TAX


On 7/2/2019 18:07, Joseph M. Durnal wrote:

I'm not sure if I am experiencing the KPA3 power connector issue or
not.  I've gotten the ERR 12V message twice today.  Powering the K3
off and on again will clear the message, but it came back, but cleared
again after a power cycle.

And, as I type this while transmitting some FT8 in the background, it
gave me the error message again.  The full Elecraft K3  KPA3 Power
Connector Replacement  procedure looks like something I won't have
time to do until next month, is there a quick bandaid I an try until
then?  Also, is it safe to use the K3 at 10 watts until I get it
fixed?

Thanks & 73 de Joseph M. Durnal - NE3R




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Re: [Elecraft] When Transmitting on FT8 - KPA500 has issues - KD8ZYD

[Nr4c]

Does this happen without the amp?  

Sent from my iPhone
...nr4c. bill


> On Jul 2, 2019, at 8:13 PM, Fred  wrote:
> 
> I’m going to try and answer all the questions that have shown up in this
> thread.  I really appreciate all the ideas and things to check.  I do have
> a day job (7 years to go) so I only have time to play with this at night
> and try and debug.
> 
> 
> 
> I drive my KPA 500 with somewhere between 20 and 25 watts from the K3
> depending on the band
> 
> 
> 
> I do not get any faults on the KPA 500 or KAT 500.
> 
> 
> 
> The fault log on the KPA 500 was clean
> 
> 
> 
> I will test with WSJTx in the Tune mode and report back.  I will check the
> sound card settings to make sure they are correct
> 
> 
> 
> My computer is home built, i5-4590 CPU @ 3.3 GHz, 16 GB Memory, SSD Drive,
> decent graphics card
> 
> 
> 
> Andy, K3WYC posted - I have not looked at the video but this sounds very
> similar to a problem I have seen.   In my case HDSDR sound output had
> spontaneously changed to TS-590 TX CODEC creating a feedback loop through
> the PC.  Break the loop and all is normal.  – Question, how do you break
> the loop?
> 
> 
> 
> All connections are good.  When I built the K-Line, I made all new Co-ax
> cables with Amphenol connectors.  All Elecraft cables are less than 2 years
> old.
> 
> 
> 
> I need to add a ground from my MFJ Anderson Power Poll connection strip.
> Everything else is grounded to a ground bar, to a 10 foot copper rod
> outside the house, connected to another 10 foot copper rod at my tower and
> so on.
> 
> 
> 
> I have not tried to see if this happens at 200 watts.  I need to pay
> attention to see if it happens just on certain bands, or only on my Mosley
> or my wire dipole.  It never happens if I am not using the KPA 500.
> 
> 
> 
> Jack, W6FB if I let this go and check things as it is happening, do you
> think I could damage my equipment?  That is one thing that worries me so
> when it happens, I kill the transmit ASAP
> 
> 
> 
> I want to thank everyone in the Elecraft community for all the replies!!
> Thanks a lot!!
> 
> 
> 
> Please let me know if anyone has any other questions.
> 
> 
> 
> Fred, KD8ZYD
> 
> -- 
> Thanks,
> 
> Fred
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[Elecraft] KPA1500 PSU FAN ISSUE RESOLVED

[eric norris via Elecraft]

The squealing PSU fan issue was so bad, I didn't turn the KPA1500 on for many 
months.  When I finally did, the squeal was gone.  Since it did not turn up on 
burn-in, I can only guess that some jostling in shipping did something.  After 
hours of running it has not come back.  Better yet, with the piercing 
high-pitch scream gone, my Bose noise-cancelling phones again give me a quiet 
shack  
This is ironic.  Amid many complaining about KPA1500 fan noise, my complaints 
of what turned out to be a defect condition got lost.  The same thing happened 
to me with my KPA500, which made a house-filling buzzing sound.  At that time 
many were complaining about the KPA500 buzz.  I finally arranged a call with 
support, and was told as soon as I powered it up that that is not normal.  In 
that case, support sent me a slightly different transformer bolt, and some 
different washers--problem solved.  In the KPA1500 case, supoort sent me a new 
led board, and a 50v output resistor as well as new fans.  Once I got the psu 
cover off, I saw that replacing the fans was beyond my current fine motor 
skills.  The hive mind suggested taking sound readings with the Sound Meter 
app, so for those who care, here are the pre and post led board replacement 
numbers.  I only wish I would have thought of this while that puppy was 
howling.  Old board:  quiet shack 3am 2.5 ft above fans 33db.  KPA1500 in idle: 
47db. Same cdx, new board  quiet shack 33db, KPA1500 at idle: 42db.  Noticeably 
quieter.  Quieter than one of my AL800Hs.  Quieter than Boudicca the cat 
purring.
Now the sun is shining, my faith in Elecraft is restored, and I love the 
KPA1500 again.  I should have known Elecraft would not release an amplifier 
that sounded like a 737 on throttle up.
73 Eric WD6DBM

Sent from Yahoo Mail on Android
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Re: [Elecraft] When Transmitting on FT8 - KPA500 has issues - KD8ZYD

[Andy Durbin]

"In my case HDSDR sound output had spontaneously changed to TS-590 TX CODEC 
creating a feedback loop through
the PC.  Break the loop and all is normal.  

– Question, how do you break the loop?"

In my case I simply changed HDSDR sound output back to the Virtual Audio Cable 
it was intended to be assigned to.   If not using VAC the normal output 
selection would probably be PC speakers.

The symptoms of the feedback loop were oscillation of power output and TS-590 
ALC at about 1 Hz.   The oscillation frequency depends on the delay between 
signal detection by my SDRPlay RSP, demodulation by HDSDR, and output on PC USB 
audio to the TS-590.   Seen it several times.  The first time was quite 
alarming.  Quick fix is to kill HDSDR.

I don't remember hearing any relay click at 1 Hz but I suppose it's possible 
the feedback loop could cause the KPA500 attenuator relay to activate.

73,
Andy, k3wyc

73,
Andy, k3wyc


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Re: [Elecraft] The ERR 12V Message Question

[Dennis Moore]

That issue went away for me when I switched to a shorter heavier power 
cord. How long/what gauge is your present power cable?


Running 10 watts shouldn't present a problem, not much current draw so 
not much loss in the cable/connector.


Dennis NJ6G

On 7/2/2019 18:07, Joseph M. Durnal wrote:

I'm not sure if I am experiencing the KPA3 power connector issue or
not.  I've gotten the ERR 12V message twice today.  Powering the K3
off and on again will clear the message, but it came back, but cleared
again after a power cycle.

And, as I type this while transmitting some FT8 in the background, it
gave me the error message again.  The full Elecraft K3  KPA3 Power
Connector Replacement  procedure looks like something I won't have
time to do until next month, is there a quick bandaid I an try until
then?  Also, is it safe to use the K3 at 10 watts until I get it
fixed?

Thanks & 73 de Joseph M. Durnal - NE3R


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[Elecraft] The ERR 12V Message Question

[Joseph M. Durnal]

I'm not sure if I am experiencing the KPA3 power connector issue or
not.  I've gotten the ERR 12V message twice today.  Powering the K3
off and on again will clear the message, but it came back, but cleared
again after a power cycle.

And, as I type this while transmitting some FT8 in the background, it
gave me the error message again.  The full Elecraft K3  KPA3 Power
Connector Replacement  procedure looks like something I won't have
time to do until next month, is there a quick bandaid I an try until
then?  Also, is it safe to use the K3 at 10 watts until I get it
fixed?

Thanks & 73 de Joseph M. Durnal - NE3R
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Re: [Elecraft] When Transmitting on FT8 - KPA500 has issues - KD8ZYD

[Fred]

I’m going to try and answer all the questions that have shown up in this
thread.  I really appreciate all the ideas and things to check.  I do have
a day job (7 years to go) so I only have time to play with this at night
and try and debug.



I drive my KPA 500 with somewhere between 20 and 25 watts from the K3
depending on the band



I do not get any faults on the KPA 500 or KAT 500.



The fault log on the KPA 500 was clean



I will test with WSJTx in the Tune mode and report back.  I will check the
sound card settings to make sure they are correct



My computer is home built, i5-4590 CPU @ 3.3 GHz, 16 GB Memory, SSD Drive,
decent graphics card



Andy, K3WYC posted - I have not looked at the video but this sounds very
similar to a problem I have seen.   In my case HDSDR sound output had
spontaneously changed to TS-590 TX CODEC creating a feedback loop through
the PC.  Break the loop and all is normal.  – Question, how do you break
the loop?



All connections are good.  When I built the K-Line, I made all new Co-ax
cables with Amphenol connectors.  All Elecraft cables are less than 2 years
old.



I need to add a ground from my MFJ Anderson Power Poll connection strip.
Everything else is grounded to a ground bar, to a 10 foot copper rod
outside the house, connected to another 10 foot copper rod at my tower and
so on.



I have not tried to see if this happens at 200 watts.  I need to pay
attention to see if it happens just on certain bands, or only on my Mosley
or my wire dipole.  It never happens if I am not using the KPA 500.



Jack, W6FB if I let this go and check things as it is happening, do you
think I could damage my equipment?  That is one thing that worries me so
when it happens, I kill the transmit ASAP



I want to thank everyone in the Elecraft community for all the replies!!
Thanks a lot!!



Please let me know if anyone has any other questions.



Fred, KD8ZYD

-- 
Thanks,

Fred
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Re: [Elecraft] Elecraft KX4

[Rick WA6NHC]

And don't forget that he modified the Baudot code (he called it upper 
and lower sets, not case) so that we could transfer binary (actual 
programs) via RTTY, all on the 146.10/70 repeater.


Those were fun days.

Rick nhc


On 7/2/2019 11:34 AM, Alan wrote:


My favorite example of early free software contributors was Irv Hoff 
W6FFC (SK).  He was big in RTTY (radioteletype) in the early days. 
Among other things, he designed the "Mainline" series of FSK 
demodulators and the AK1 frequency-shift keyer.  He wrote a couple of 
dozen articles about RTTY in QST and elsewhere back in the 1960s and 
early 70s.


Later he got into computers.  Somewhere he acquired a surplus DEC 
computer and had fun programming it to run his RTTY station.  When 
personal computers came out in the 1970s, Irv jumped right in. His 
contributions to free software included IMP (Irv's Modem Program, 
later "Improved" Modem Program), which became the standard for CP/M 
and other early home computers.


He also wrote many other utilities that he shared freely.  Just a few 
I happen to know about: LHA (file compression and archive program), 
XIZ and XZI to translate machine code from Intel 8080 to Zilog Z-80 
and vice-versa, BD (find bad disk sectors and lock them out), CHEK 
(CRC file integrity checker), MDM (another modem program), M7LIB 
(manage telephone numbers in MDM library), file13 (file search 
utility), filt (text filters), find (find ASCII string in a file), 
form (source code formatter), formatin (format text files), justify 
(right margin justification), kmd (RCMP utility), listt (list text 
files to printer with nice formatting), mcatxcat (disk catalog 
system), neat (source code reformatter), osmdm (modem program for 
Osborne 1 computer), oxmdm (modem program for Osborne Executive 
computer), FOR (search RCMP list), DIRR (directory listing program), 
etc. etc.


Alan N1AL a6...@gmail.com 

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[Elecraft] TESTING

[Jim Ragsdale]

Testing...thanks!

73, Jim W5LA

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Re: [Elecraft] P3 Keyboard current available through USB

[Alan]

The P3 SVGA USB connector is intended for a keyboard or memory stick, 
which are low-power devices.  For that reason, the current is limited to 
a single unit load = 100 mA (x 5V = 1/2 watt).


Alan N1AL


On 7/2/19 9:00 AM, w4sc wrote:

Looking for the specified current that can be supplied through the keyboard USB 
connector.  USB2.0 spec says 500ma.  What current (ma) is available from P3?  
Is it limited to a lower value through a current monitor / switch?

Sent from Mail for Windows 10

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Re: [Elecraft] Elecraft KX4

[Alan]

> I suspect ELecraft do actually support modified hardware, which most 
people wouldn't.


Yes, I believe that is true.  Wayne and Eric are long-time supporters of 
homebrewing.


> Incidentally a lot of the original developers of the internet (before 
commercialisation) were radio amateurs.


My favorite example of early free software contributors was Irv Hoff 
W6FFC (SK).  He was big in RTTY (radioteletype) in the early days. Among 
other things, he designed the "Mainline" series of FSK demodulators and 
the AK1 frequency-shift keyer.  He wrote a couple of dozen articles 
about RTTY in QST and elsewhere back in the 1960s and early 70s.


Later he got into computers.  Somewhere he acquired a surplus DEC 
computer and had fun programming it to run his RTTY station.  When 
personal computers came out in the 1970s, Irv jumped right in.  His 
contributions to free software included IMP (Irv's Modem Program, later 
"Improved" Modem Program), which became the standard for CP/M and other 
early home computers.


He also wrote many other utilities that he shared freely.  Just a few I 
happen to know about: LHA (file compression and archive program), XIZ 
and XZI to translate machine code from Intel 8080 to Zilog Z-80 and 
vice-versa, BD (find bad disk sectors and lock them out), CHEK (CRC file 
integrity checker), MDM (another modem program), M7LIB (manage telephone 
numbers in MDM library), file13 (file search utility), filt (text 
filters), find (find ASCII string in a file), form (source code 
formatter), formatin (format text files), justify (right margin 
justification), kmd (RCMP utility), listt (list text files to printer 
with nice formatting), mcatxcat (disk catalog system), neat (source code 
reformatter), osmdm (modem program for Osborne 1 computer), oxmdm (modem 
program for Osborne Executive computer), FOR (search RCMP list), DIRR 
(directory listing program), etc. etc.


Alan N1AL

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[Elecraft] FS: ELECRAFT P3, P3TXMON

[W0FK]

 
P3 Panadapter. Comes with cblp3y cable to interface with the K3S and cables
for the K3. $599 plus shipping.
 
P3TXMON P3 transmit monitor/DCHF-2000 1.8-54 MHz, 1- 2000W coupler. $175
plus shipping.
 
Buy both for $775, shipping included 50 States.
 
PayPal and certified checks accepted, US sales only. 
 
Please contact me off the list to lladerman AT earthlink DOT net.

73, Lou, W0FK
  




-
St. Louis, MO

"The difference between stupidity and genius is that 
genius has its limits." Albert Einstein


--
Sent from: http://elecraft.365791.n2.nabble.com/
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Re: [Elecraft] KX2 waterfall

[Phil Genera]

They're available on ebay, apparently, and the listing links to videos of
the required modification.

-- 
Phil
W1JV


On Tue, Jul 2, 2019 at 12:13 PM Adam Goler  wrote:

> Pretty cool. Might have to look into this...
>
> Thanks!
>
> On Mon, Jul 1, 2019 at 11:24 PM Todd KH2TJ  wrote:
>
> > There was some chatter a couple months back about a board designed by
> > UC6UAA that replaces the KXIO2 board.
> >
> > https://www.youtube.com/watch?v=Onf63FwbiZo
> > 
> > Transceiver Elecraft KX2, I/Q out and time board and PowerSDR. UC6UAA
> > Russia. seg...@mail.ru 
> > Демонстрация работы платы "I/Q выхода и времени". Трансивер KX2 и
> > программа PowerSDR.
> > www.youtube.com
> >
> >
> > Haven't heard much more about it
> >
> > Later,
> > Todd KH2TJ
> >
> >
>
> --
> Adam Goler, PhD
> Cell: (425) 985 8700
>
>
>
> "Fear is the mind killer."
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Re: [Elecraft] No TX output in data mode

[Bob McGraw K4TAX]

I've found that all USB cables are not created equal.  Some are 
apparently better shielded than others.   I tried and replaced 3 or 4 
different ones / brands / lengths, in the same location and 
configuration {between my K3S and my laptop} before I found one that did 
not cause the WSJT-X software to lock up or default on the computer.    
Some bands were OK while some were always problematic.   I also found 
that adding a snap-on ferrite at the computer was a big aid in resolving 
the issue.   As of now, I can work 160M - 6M at 500 watts {where 
permitted} all modes with the KPA500 with zero issues.


As to "grounding", or bonding,  I do have and strongly suggest that each 
piece of equipment is bonded or connected by an individual dedicated 
conductor to a common point.  I use the station power supply as the 
common point.   Some say that daisy chain method is preferred, although 
I prefer the star method.   As to a "station ground" to the outside 
world, in some cases the length of the conductor used between the 
station and external ground point becomes an antenna in the presence of 
the transmitted signal, thus forcing the station above RF ground.   In 
my case I only use the AC 3rd pin ground for safety and for all 
equipment. Lightning protection is done outside of the house, hence no 
dedicated "station ground" is employed.    Antennas here use both coax 
fed types and balanced line types.


Good luck with your endeavors.

73

Bob, K4TAX

P.S. - based on your commentI suggest you not keep or use your 
laptop in the water.   HI  HI




On 7/2/2019 8:05 AM, Bill Weaver wrote:
   
  While using my K3 in data A mode with wsjt-x software on 6M, TX stopped, and other data modes also have no TX output. RX remains OK, and CW and SSB TX  &  RX still work OK. Need suggestions on diagnosis or reset process. Direct replies off list are OK. Thanks, Skip W5GAI

I occasionally have rf get into the laptop and blow it out of the water and everything 
including the above symptom results. A reboot of the laptop and K3S restart after moving 
some wires around usually fix it. In my case, better bonding and judicious use of ferrite 
would cure the problem. I'm still in a "temporary" mode with the station build 
:-). I'll get there!
  73
  Bill WE5P
  


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Re: [Elecraft] KX2 waterfall

[Adam Goler]

Pretty cool. Might have to look into this...

Thanks!

On Mon, Jul 1, 2019 at 11:24 PM Todd KH2TJ  wrote:

> There was some chatter a couple months back about a board designed by
> UC6UAA that replaces the KXIO2 board.
>
> https://www.youtube.com/watch?v=Onf63FwbiZo
> 
> Transceiver Elecraft KX2, I/Q out and time board and PowerSDR. UC6UAA
> Russia. seg...@mail.ru 
> Демонстрация работы платы "I/Q выхода и времени". Трансивер KX2 и
> программа PowerSDR.
> www.youtube.com
>
>
> Haven't heard much more about it
>
> Later,
> Todd KH2TJ
>
>

-- 
Adam Goler, PhD
Cell: (425) 985 8700



"Fear is the mind killer."
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[Elecraft] P3 Keyboard current available through USB

[w4sc]

Looking for the specified current that can be supplied through the keyboard USB 
connector.  USB2.0 spec says 500ma.  What current (ma) is available from P3?  
Is it limited to a lower value through a current monitor / switch?

Sent from Mail for Windows 10

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[Elecraft] KPA 1500 Remote Program V1.27

[Burl Borcherding]

The new software release V1.27 (6/21/19) will now allow WAN connections to your 
KPA 1500 for true remote operations.  You can now get rid of the extra devices 
and or computer to control you KPA1500 remotely outside your LAN.
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[Elecraft] FS: ELECRAFT P3, P3SVGA, P3TXMON

[W0FK]

P3 Panadapter. Comes with cblp3y cable to interface with the K3S and cables
for the K3. $599 plus shipping.
  
P3SVGA P3 Video/FFT Adapter for $245, includes shipping to 50 States.. 
  
P3TXMON P3 transmit monitor/DCHF-2000 1.8-54 MHz, 1- 2000W coupler. $175
plus shipping.
  
Buy all 3 for $999, shipping included 50 States.
   
Shipping and insurance for value included to “lower 48,” AK and HI will be
additional due to distances involved. PayPal and certified checks accepted,
US sales only. 
 
Please contact me off the list at lladerman AT earthlink DOT net. 73, Lou,
W0FK
 





-
St. Louis, MO

"The difference between stupidity and genius is that 
genius has its limits." Albert Einstein


--
Sent from: http://elecraft.365791.n2.nabble.com/
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[Elecraft] No TX output in data mode

[Bill Weaver]

 

 

 
>  
>  While using my K3 in data A mode with wsjt-x software on 6M, TX stopped, and 
> other data modes also have no TX output. RX remains OK, and CW and SSB TX  &  
> RX still work OK. Need suggestions on diagnosis or reset process. Direct 
> replies off list are OK. Thanks, Skip W5GAI 

 
> I occasionally have rf get into the laptop and blow it out of the water and 
> everything including the above symptom results. A reboot of the laptop and 
> K3S restart after moving some wires around usually fix it. In my case, better 
> bonding and judicious use of ferrite would cure the problem. I'm still in a 
> "temporary" mode with the station build :-). I'll get there!
 
>
 
> 73
 
> Bill WE5P
 
 
 
   
 

 
 
 
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Re: [Elecraft] Elecraft KX4

[David Woolley]

In my experience, radio amateurs behave like the general public with 
respect to intellectual property; they generally only respect property 
rights in physical objects.  They'll copy magazine articles without 
paying royalties to publisher, play videos at clubs in spite of the home 
use only warnings, etc.


Much experimentation with equipment is probably legally dodgy, although 
I think there are patent exemptions for experimentation, but possibly 
not for subsequent use beyond validating the design,


In terms of only supporting official versions, there are techniques, 
such as digital signatures, to identify official firmware, even if 
people violate trademarks.  Android is open source, but is still trusted 
for some secure applications.


I suspect ELecraft do actually support modified hardware, which most 
people wouldn't.


Incidentally a lot of the original developers of the internet (before 
commercialisation) were radio amateurs.  One of the big reasons that we 
have TCP/IP now and not something based on X.25, and the OSI model, is 
the open source nature of the key implementations.


--
David Woolley

On 01/07/2019 19:10, Alan wrote:
The software was copyrighted, but that didn't prevent some hams (in 
Germany as I recall) from running a reverse compiler on the code, making 
a few minor changes, and re-compiling it so they could make pirate chips.


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