[Elecraft] RF feedback? only when using KXPA100

[David F. Reed]

This did not used to happen; it is new to my set-up, nothing I am aware 
of has changed...


When trying to operate JT65, if I set the power to 10 watts, everything 
is fine (KXPA100 is not active).
If I set to anything above 10 watts (yeah, like 11 watts or more), I get 
bad RF feedback (sounds like motor boating in monitor).
SWR via tune looks good, all cables have been taken out, checked and 
re-inserted.


I am stumped and looking for hints as to what I ought to look at next, 
or re-check or try.


Thanks & 73 de Dave, W5SV
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Re: [Elecraft] KAT500 and KPA500 Remote software Server / Client issue - This time in Text Format

[Serge Bertuzzo]

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[Elecraft] Loading a KX3 frequency memory editor file into a KX2

[Dan Baker]

Simply asked, can this be done? This file has 160 and 6 meters in it.
Should those channels be deleted first?

Thanks,Dan KM6CQ


Don't sacrifice your hobby
for the right house.
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[Elecraft] Elecraft CW Net Announcement

[kev...@coho.net]

Good Evening,

This week has been hot and very smoky.  Only today is there enough 
breeze to see the surrounding mountains.  All week it was very calm and 
the smoke thick.  Sleeping is not easy when the smell of smoke wakes you 
up all the time.  Your natural instinct is to find the fire but these 
aren't even close.


The massive sunspot of two weeks ago is back but most of its energy has 
been expended.  Even so the solar wind has not ceased.  The only real 
impediment should be summer storms and just plain weak signals.  
However, you just never can tell.


Please join us tomorrow on:
   14050 kHz at 2200z Sunday (3 PM PDT Sunday)
7045 kHz at z Monday (5 PM PDT Sunday)

73,
Kevin. KD5ONS

-

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Re: [Elecraft] KAT500 and KPA500 Remote software Server / Client issue - This time in Text Format

[tomb18]

HiThis might be a long shot but recently I ran into an issue where I could not 
access a iP to IR gateway for my home theater. It uses a web interface to allow 
configuration. I tried disabling all firewalls, all kinds of things. Then I 
went to another computer and it worked fine. So I configured it, and later that 
day I got a message that there was a new version of my antivirus software which 
is Avast. So I installed it. Later that evening I went to update the gateway 
again and could not connect! Perplexed I went to bed. Next morning I thought 
about it and said, hey what about the antivirus software? I disabled it and low 
and behold it worked on all PC's. Seems that antivirus software is now also 
restricting access to network devices that are not considered standard. You 
might give it a try. 73 Tom Va2fsq.com 



Sent from my Samsung Galaxy smartphone.
 Original message From: Serge Bertuzzo  
Date: 2017-08-05  9:13 PM  (GMT-05:00) To: elecraft  
Subject: [Elecraft] KAT500 and KPA500 Remote software Server / Client issue - 
This time in Text Format 
Hello to the group. 

I have downloaded both the KAT500 and KPA500 remote software. I am using them at
my remote site. I have a Windows 10 computer that I can access via Anydesk or
Teamviewer. 

I am unable to connect to either program in a Server/Client combination. I keep
getting a message that "failed to connect".

What I have done so far is:

I am able to Ping the host PC from a couple of other computers within the same
network.
I am able to get the programs working if I connect directly to the remote
computer (using either the Host IP address or local host)
I temporarily disabled all firewall programs on all computers
I cannot connect from 2 separate computers on the same network (Windows 7)
At the remote site I have an ethernet switch that I connected to directly and
was still not able to access the computer about 5 feet away
I have made sure that the port has been opened in my DSL router (although when
using the same network I realize that this is not required)
I have the latest  firmware in both the KPA500 and KAT 500
Not quite sure what I am doing wrong. Any assistance would be greatly
appreciated as I am presently at the remote site for the weekend.

73

Serge

VA3SB
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Re: [Elecraft] Spectrum pic

[Wes Stewart]

Thanks Brian.

I've been reviewing my test setup.  Because of limited USB ports on my normal 
station computer (laptop) I have been using a new (to me) desktop I'm building 
to be the station computer, to run both WSJT-X and my SDR-IQ software 
(SpectraVue) for this investigation.  The sidebands I mentioned are quite 
noticeable but it started to not make sense to me in the way they moved as I 
changed the tone frequency.


To eliminate possible crosstalk between programs I went back to the laptop 
running WSJT and used my other K3 as a manually tuned spectrum analyzer.  The 
sidebands are still there but way down in the mud.  I think I'm hearing what's 
being generated in the SDR-IQ but I have yet to prove that, or understand why 
they might be generated.  It's not overload, the main signal and sidebands 
change amplitude dB per dB in sync with a stepped attenuator on the input.  And 
as I said elsewhere, when I was suffering TX IMD issues this same receiver was 
used to document the problem and when the radio went back to Elecraft for mods, 
they agreed with my numbers.


That said I decided to check calibration on the SDR-IQ while running on the new 
computer.  A lot of the processing is done in the SDR-IQ so I didn't expect an 
issue other than tweaking FFT gain in the SpectraVue program.  I connected the 
XG2 and tuned it in on 14.06 MHz.  The trace was jumping in amplitude about 3-4 
dB at about a 1 Hz rate.  I also run Lady Heather via a serial port to a 
Motorola Oncore timing receiver (1PPS) and I've seen it take over my mouse 
before, making it jump all over the screen.  So I disconnected the serial port 
without effect.  I rebooted and started only SpectraVue and saw the same issue.


One last experiment (for now) was to use a third computer to run the SDR-IQ.  On 
this one everything is perfectly stable.  So I have a baffling problem with one 
computer, unfortunately the one I was using to present earlier data, which are 
of course now suspect.


Nevertheless, the cyclic ALC is still there and the difficulty in setting levels 
is too.


Frankly, I don't know why I'm doing all of this for a mode that I don't even 
like.

Regards,

Wes


On 8/5/2017 2:47 PM, Brian Hunt wrote:

Not seeing your -50 dBc side bands. Maybe there is a little blip at -68 dBc. 
Pic below is WSJT-X FT8 @ 1500 Hz with 100 Hz/division, BW 10 Hz. The old scope 
is pretty drifty at those numbers. 
I'll add it to my photo site.

73,
Brian, K0DTJ





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[Elecraft] KAT500 and KPA500 Remote software Server / Client issue - This time in Text Format

[Serge Bertuzzo]

Hello to the group. 

I have downloaded both the KAT500 and KPA500 remote software. I am using them at
my remote site. I have a Windows 10 computer that I can access via Anydesk or
Teamviewer. 

I am unable to connect to either program in a Server/Client combination. I keep
getting a message that "failed to connect".

What I have done so far is:

I am able to Ping the host PC from a couple of other computers within the same
network.
I am able to get the programs working if I connect directly to the remote
computer (using either the Host IP address or local host)
I temporarily disabled all firewall programs on all computers
I cannot connect from 2 separate computers on the same network (Windows 7)
At the remote site I have an ethernet switch that I connected to directly and
was still not able to access the computer about 5 feet away
I have made sure that the port has been opened in my DSL router (although when
using the same network I realize that this is not required)
I have the latest  firmware in both the KPA500 and KAT 500
Not quite sure what I am doing wrong. Any assistance would be greatly
appreciated as I am presently at the remote site for the weekend.

73

Serge

VA3SB
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[Elecraft] KX3 Heatsink discussion

[Jan]

I'm puzzled by the comment posted yesterday:  by Jim W7JR

""I've been doing a lot of FT-8 using my KX3 and my KXPA100 at 20 watts,
and have noticed that the KX3 is heating up quite a bit and is almost
hot to the touch""

Why should the KX3 be heating up, when the AMP is running only 20W ?
Is the KX3 "drive" not backed-down at this level ?? HELP

Cheers, Jan K1ND

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Re: [Elecraft] K3: Odd ALC behavior

[David Anderson via Elecraft]

I was thinking that as the "ALC" meter isn't really showing ALC, but audio 
level when below I believe 5 bars? - that the ALC isn't being modulated, rather 
what we may be seeing is an artefact caused by the way the peak level of the 
audio is detected by sampling the audio at a particular sampling rate.  

Because it isn't just a simple hardware analog peak detector that is used, the 
audio meter reading displayed will beat between the sampling rate of the audio 
detector and the actual frequency of the tone, even an absolutely pure tone 
with no harmonics. 

I have seen similar odd things happen with another make of radio with their 
power meter (which again is sampled) and AM modulation on the transmission. 
Putting a true analog power meter on the output showed no variation in power 
output, it was all an illusion.

It's just one of those annoying things that happen when we aren't dealing with 
purely analog methods of detection of frequencies. You see similar aliases when 
using modern Digital Sampling Oscilloscopes.

As you have pointed out the solution can only involve moving the software's 
tune frequency to a frequency that does not beat at such a visibly slow rate 
with the audio detector sampling rate. 

73 from David GM4JJJ

> On 5 Aug 2017, at 00:45, Wayne Burdick  wrote:
> 
> Is it possible that a beat note between tones (and their harmonics) is what’s 
> modulating the ALC reading? If so, moving the tone slightly off the standard 
> pitch may be an acceptable workaround.
> 
> Wayne
> N6KR
> 
> 
>> On Aug 4, 2017, at 1:42 PM, Wes Stewart  wrote:
>> 
>> Good find Brian!!! I see it too in FT8.
>> 
>> This probably explains the great variability in results reported. Some of us 
>> have a problem, others say, Huh, what the heck are you talking about?
>> 
>> Wes, N7WS
>> 
>> 
>>> On 8/4/2017 11:33 AM, Brian Hunt wrote:
>>> Here's some followup:
>>> FLDIGI shows the "pumping" affect with carrier tones of 500, 1000, 1500, 
>>> and 2000 Hz.
>>> WSJT-X 1.8 shows the "pumping" affect with carrier tones of 1000, 1500 and 
>>> 2000 Hz (couldn't select 500 Hz).
>>> 
>>> The affect is very narrow with frequency.  10 Hz either way and the output 
>>> and ALC display and MON output is rock solid.  Changing the K3 filter 
>>> center frequency has no effect on the above.
>>> 
>>> 73,
>>> Brian, K0DTJ
>>> 
 On 8/4/2017 10:58, Brian Hunt wrote:
 I spent some quality time with my K3, FLDIGI and an oscilloscope today.  I 
 had the same problem as described.  Looking at my USB soundcard output to 
 the K3, the amplitude of the audio from FLDIGI in TUNE mode was rock 
 solid. Looking at the MON output from the K3, the level oscillated in time 
 with the ALC "pumping" at about 2.4 Hz (timed with a stop watch).  At the 
 same time the K3 power output into a dummy load was rock solid at a 
 selected 10 watts.
 
 Then I changed the carrier frequency in FLDIGI slightly off 1500 Hz and 
 the "pumping" went away!  At 1515 Hz I could easily set the ALC to the 
 desired 4 bars solid, 5th flickering.  Then I remembered (and verified) 
 that the default filter center in DATA A mode is 1500 Hz. I changed the 
 filter center frequency to 1450 Hz and moved the FLDIGI frequency around 
 but couldn't reproduce the "pumping".
 
 I plan to repeat the same tests with WSJT-X 1.8 but wanted to get this out 
 to the group.
 
 73,
 Brian, K0DTJ
 
>>> 
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>> 
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Re: [Elecraft] K3: Odd ALC behavior

[Wes Stewart]

I said earlier:

"If I set the tone to 1500 Hz, the FT8 mid-band target, I'm presented with the 
cyclic ALC and some ~193 Hz, -50 dBc sidebands. "


Ten KHz/div is too coarse to see these.  Try again.

Wes  N7WS

On 8/5/2017 1:01 PM, Brian Hunt wrote:
Here are some spectrum photos from the tune signals of both FLDIGI and WSJT-X 
1.8.  All three are essentially identical showing some low level sideband 
noise +/- 30 kHz and down > 60dBc.  There's no apparent difference in the 
spectra between pumping and non-pumping ALC, as Wes reported.


http://www.pbase.com/brhunt/spectrum_photos

Enjoy!

73,
Brian, K0DTJ 


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Re: [Elecraft] K3: Odd ALC behavior

[Brian Hunt]

Here are some spectrum photos from the tune signals of both FLDIGI and 
WSJT-X 1.8.  All three are essentially identical showing some low level 
sideband noise +/- 30 kHz and down > 60dBc.  There's no apparent 
difference in the spectra between pumping and non-pumping ALC, as Wes 
reported.


http://www.pbase.com/brhunt/spectrum_photos

Enjoy!

73,
Brian, K0DTJ

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Re: [Elecraft] K3: Odd ALC behavior

[Wes Stewart]

Nope, I was responding to Joe.  I top posted right above his commentary per 
Elecraft list guidelines.


On 8/5/2017 12:47 PM, M. George wrote:

Wes, I understand that... assuming you are responding to me... I was asking
Joe what .inf file to modify and then reinstall the USB CODEC generic
driver to disable the irritating microphone boost which makes it too
sensitive.  I'm taking about the KIO3B USB CODEC here... Max NG7M

On Sat, Aug 5, 2017 at 1:24 PM, Wes Stewart  wrote:


Except when the sound card is in the computer instead of the radio, "Line
In" is receiving signal from the program via the sound card 'speaker'
output, not the microphone.  Moving the card into the radio doesn't change
this. The only thing changed is it's too darned sensitive.

Regards,

Wes  N7WS


  On 8/5/2017 9:39 AM, Joe Subich, W4TV wrote:


On 8/5/2017 11:14 AM, Wes Stewart wrote:


But IMHO, you need to put a 30 dB attenuator on the input of the
internal sound card; it is way too sensitive. I'm having to run the Windows
gain at less than 5% and Line In at 10 or less.


Actually, you need to adjust the options in the Windows *.inf file
used for the PCM-series CODEC (or use the codec that identifies as
line level).  Windows is turning on a 20 dB preamp in the CODEC.

I suspect if one sets the Windows Sound Options (Control Panel) to
display dB rather than percentage, the minimum level will be some-
thing like 16 to 20 dB!  That indicated the fixed 20 dB "mic preamp"
is engaged.

73,

... Joe, W4TV



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Re: [Elecraft] K3: Odd ALC behavior

[M. George]

Wes, I understand that... assuming you are responding to me... I was asking
Joe what .inf file to modify and then reinstall the USB CODEC generic
driver to disable the irritating microphone boost which makes it too
sensitive.  I'm taking about the KIO3B USB CODEC here... Max NG7M

On Sat, Aug 5, 2017 at 1:24 PM, Wes Stewart  wrote:

> Except when the sound card is in the computer instead of the radio, "Line
> In" is receiving signal from the program via the sound card 'speaker'
> output, not the microphone.  Moving the card into the radio doesn't change
> this. The only thing changed is it's too darned sensitive.
>
> Regards,
>
> Wes  N7WS
>
>
>  On 8/5/2017 9:39 AM, Joe Subich, W4TV wrote:
>
>>
>> On 8/5/2017 11:14 AM, Wes Stewart wrote:
>>
>>> But IMHO, you need to put a 30 dB attenuator on the input of the
>>> internal sound card; it is way too sensitive. I'm having to run the Windows
>>> gain at less than 5% and Line In at 10 or less.
>>>
>>
>> Actually, you need to adjust the options in the Windows *.inf file
>> used for the PCM-series CODEC (or use the codec that identifies as
>> line level).  Windows is turning on a 20 dB preamp in the CODEC.
>>
>> I suspect if one sets the Windows Sound Options (Control Panel) to
>> display dB rather than percentage, the minimum level will be some-
>> thing like 16 to 20 dB!  That indicated the fixed 20 dB "mic preamp"
>> is engaged.
>>
>> 73,
>>
>>... Joe, W4TV
>>
>>
>> On 8/5/2017 11:14 AM, Wes Stewart wrote:
>>
>>> Wayne,
>>>
>>> There are no beat notes. These frequencies, at least from the FT8
>>> program in Tune mode are single frequency.  Based upon output RF spectrum
>>> measurements*, with for example 1010 Hz input and 4-5 bars of ALC, I see
>>> spurious or intermodulation sidebands, down -65 dBc.  If I change nothing
>>> else but adjust the tone frequency to 1000 Hz  the spectrum is the same but
>>> the ALC bars are cyclic, going from none to 4-5, at about the 2 HZ rate
>>> Brian reported earlier. (Slow ALC in action?)  That's the good news.
>>>
>>> If I set the tone to 1500 Hz, the FT8 mid-band target, I'm presented
>>> with the cyclic ALC and some ~193 Hz, -50 dBc sidebands.
>>>
>>> I have tried this with both the K3S internal sound card and via Line
>>> In/Out into my laptop sound card.  The results are more-or-less the same.
>>> But IMHO, you need to put a 30 dB attenuator on the input of the internal
>>> sound card; it is way too sensitive.  I'm having to run the Windows gain at
>>> less than 5% and Line In at 10 or less.
>>>
>>> I would suggest that you do some measurements with a low-distortion sine
>>> wave audio source run into the radio to eliminate the possibility that this
>>> junk is a result of all of the digitally generated tones.
>>>
>>> If this (what I will call a) problem continues to exist then I think a
>>> fix is in order.  Expecting users to select particular frequencies to use
>>> to set gain levels isn't an acceptable workaround.
>>>
>>> Regards,
>>>
>>> Wes  N7WS
>>>
>>>
>>> * My "spectrum analyzer" is my SDR-IQ which I have used to measure TX
>>> IMD on both my K3 and K3S.  Your IMD
>>>   measurements on my K3S concurred with mine within 1 dB or less.
>>>
>>> On 8/4/2017 4:45 PM, Wayne Burdick wrote:
>>>
 Is it possible that a beat note between tones (and their harmonics) is
 what’s modulating the ALC reading? If so, moving the tone slightly off the
 standard pitch may be an acceptable workaround.

 Wayne
 N6KR


 On Aug 4, 2017, at 1:42 PM, Wes Stewart  wrote:
>
> Good find Brian!!! I see it too in FT8.
>
> This probably explains the great variability in results reported. Some
> of us have a problem, others say, Huh, what the heck are you talking 
> about?
>
> Wes, N7WS
>
>
> On 8/4/2017 11:33 AM, Brian Hunt wrote:
>
>> Here's some followup:
>> FLDIGI shows the "pumping" affect with carrier tones of 500, 1000,
>> 1500, and 2000 Hz.
>> WSJT-X 1.8 shows the "pumping" affect with carrier tones of 1000,
>> 1500 and 2000 Hz (couldn't select 500 Hz).
>>
>> The affect is very narrow with frequency.  10 Hz either way and the
>> output and ALC display and MON output is rock solid.  Changing the K3
>> filter center frequency has no effect on the above.
>>
>> 73,
>> Brian, K0DTJ
>>
>> On 8/4/2017 10:58, Brian Hunt wrote:
>>
>>> I spent some quality time with my K3, FLDIGI and an oscilloscope
>>> today.  I had the same problem as described.  Looking at my USB 
>>> soundcard
>>> output to the K3, the amplitude of the audio from FLDIGI in TUNE mode 
>>> was
>>> rock solid. Looking at the MON output from the K3, the level oscillated 
>>> in
>>> time with the ALC "pumping" at about 2.4 Hz (timed with a stop watch).  
>>> At
>>> the same time the K3 power output into a dummy load was rock solid at a
>>> selected 

[Elecraft] OT: For Sale KPA100 kit new in box

[Eric Ward]

100W option kit for K2, box never opened.  Purchased at Dayton in May 2016,
I've downsized to an apartment and am unlikely to build it.  Would like to
get it into hands of someone who will.
Asking $350 plus shipping. ($489.95 new)
73 Eric N0HHS
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Re: [Elecraft] KX3/KX2 CAT to Rigblaster Advantage

[Don Wilhelm]

Erik,

Use the RS-232 interface, but you will need the KXSER cable to connect 
the KX3/2 to the DB9 connector.  You can order it from Elecraft or 
construct your own.  If you do not have the parts on hand but still want 
to build it, order the kit of parts W1SERKT from Elecraft.


I am certain the schematic appears in other places, but one I know about 
is on page 30 of the XG3 Owner's Manual - download it from the Elecraft 
website.


73,
Don W3FPR

On 8/5/2017 2:11 PM, Erik Tkal wrote:

The Rigblaster Advantage has both 3.5mm TTL CI-V/CAT and DB9 RS-232 interfaces, 
but it’s not clear which would be best to connect to the KX3/KX2.

Googling found old posts that the KX3 ACC1 is flexible enough to handle either, 
so easiest would be a 3.5mm stereo mini cable, but does it have to be straight 
through or crossover?  If I use 3.5mm to DB9 would it be direct connection or 
is a special level converter cable needed?  I have many USB-serial cables for 
my KX3/PX3/KXPA100/KX2, never thought to specify the DB9 version for any of 
them just to have one handy… :-/


   Thanks and 73,
   Erik Tkal  -  W1QED



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Re: [Elecraft] K3: Odd ALC behavior

[Wes Stewart]

Except when the sound card is in the computer instead of the radio, "Line In" is 
receiving signal from the program via the sound card 'speaker' output, not the 
microphone.  Moving the card into the radio doesn't change this. The only thing 
changed is it's too darned sensitive.


Regards,

Wes  N7WS

 On 8/5/2017 9:39 AM, Joe Subich, W4TV wrote:


On 8/5/2017 11:14 AM, Wes Stewart wrote:
But IMHO, you need to put a 30 dB attenuator on the input of the internal 
sound card; it is way too sensitive. I'm having to run the Windows gain at 
less than 5% and Line In at 10 or less.


Actually, you need to adjust the options in the Windows *.inf file
used for the PCM-series CODEC (or use the codec that identifies as
line level).  Windows is turning on a 20 dB preamp in the CODEC.

I suspect if one sets the Windows Sound Options (Control Panel) to
display dB rather than percentage, the minimum level will be some-
thing like 16 to 20 dB!  That indicated the fixed 20 dB "mic preamp"
is engaged.

73,

   ... Joe, W4TV


On 8/5/2017 11:14 AM, Wes Stewart wrote:

Wayne,

There are no beat notes. These frequencies, at least from the FT8 program in 
Tune mode are single frequency.  Based upon output RF spectrum measurements*, 
with for example 1010 Hz input and 4-5 bars of ALC, I see spurious or 
intermodulation sidebands, down -65 dBc.  If I change nothing else but adjust 
the tone frequency to 1000 Hz  the spectrum is the same but the ALC bars are 
cyclic, going from none to 4-5, at about the 2 HZ rate Brian reported 
earlier. (Slow ALC in action?)  That's the good news.


If I set the tone to 1500 Hz, the FT8 mid-band target, I'm presented with the 
cyclic ALC and some ~193 Hz, -50 dBc sidebands.


I have tried this with both the K3S internal sound card and via Line In/Out 
into my laptop sound card.  The results are more-or-less the same.  But IMHO, 
you need to put a 30 dB attenuator on the input of the internal sound card; 
it is way too sensitive.  I'm having to run the Windows gain at less than 5% 
and Line In at 10 or less.


I would suggest that you do some measurements with a low-distortion sine wave 
audio source run into the radio to eliminate the possibility that this junk 
is a result of all of the digitally generated tones.


If this (what I will call a) problem continues to exist then I think a fix is 
in order.  Expecting users to select particular frequencies to use to set 
gain levels isn't an acceptable workaround.


Regards,

Wes  N7WS


* My "spectrum analyzer" is my SDR-IQ which I have used to measure TX IMD on 
both my K3 and K3S.  Your IMD

  measurements on my K3S concurred with mine within 1 dB or less.

On 8/4/2017 4:45 PM, Wayne Burdick wrote:
Is it possible that a beat note between tones (and their harmonics) is 
what’s modulating the ALC reading? If so, moving the tone slightly off the 
standard pitch may be an acceptable workaround.


Wayne
N6KR



On Aug 4, 2017, at 1:42 PM, Wes Stewart  wrote:

Good find Brian!!! I see it too in FT8.

This probably explains the great variability in results reported. Some of 
us have a problem, others say, Huh, what the heck are you talking about?


Wes, N7WS


On 8/4/2017 11:33 AM, Brian Hunt wrote:

Here's some followup:
FLDIGI shows the "pumping" affect with carrier tones of 500, 1000, 1500, 
and 2000 Hz.
WSJT-X 1.8 shows the "pumping" affect with carrier tones of 1000, 1500 and 
2000 Hz (couldn't select 500 Hz).


The affect is very narrow with frequency.  10 Hz either way and the output 
and ALC display and MON output is rock solid.  Changing the K3 filter 
center frequency has no effect on the above.


73,
Brian, K0DTJ

On 8/4/2017 10:58, Brian Hunt wrote:
I spent some quality time with my K3, FLDIGI and an oscilloscope today.  
I had the same problem as described.  Looking at my USB soundcard output 
to the K3, the amplitude of the audio from FLDIGI in TUNE mode was rock 
solid. Looking at the MON output from the K3, the level oscillated in 
time with the ALC "pumping" at about 2.4 Hz (timed with a stop watch).  
At the same time the K3 power output into a dummy load was rock solid at 
a selected 10 watts.


Then I changed the carrier frequency in FLDIGI slightly off 1500 Hz and 
the "pumping" went away!  At 1515 Hz I could easily set the ALC to the 
desired 4 bars solid, 5th flickering.  Then I remembered (and verified) 
that the default filter center in DATA A mode is 1500 Hz. I changed the 
filter center frequency to 1450 Hz and moved the FLDIGI frequency around 
but couldn't reproduce the "pumping".


I plan to repeat the same tests with WSJT-X 1.8 but wanted to get this 
out to the group.


73,
Brian, K0DTJ



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[Elecraft] KX3/KX2 CAT to Rigblaster Advantage

[Erik Tkal]

The Rigblaster Advantage has both 3.5mm TTL CI-V/CAT and DB9 RS-232 interfaces, 
but it’s not clear which would be best to connect to the KX3/KX2.

Googling found old posts that the KX3 ACC1 is flexible enough to handle either, 
so easiest would be a 3.5mm stereo mini cable, but does it have to be straight 
through or crossover?  If I use 3.5mm to DB9 would it be direct connection or 
is a special level converter cable needed?  I have many USB-serial cables for 
my KX3/PX3/KXPA100/KX2, never thought to specify the DB9 version for any of 
them just to have one handy… :-/


  Thanks and 73,
  Erik Tkal  -  W1QED



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Re: [Elecraft] K3: Odd ALC behavior

[M. George]

Joe, are you talking about the wdma_usb.inf file to disable the 20 dB mic
boost?  I have been searching around for details on making the inf change
in Windows 10.  I may be missing something in the search, but if you have
modified the inf file for Windows 10, I would be really helpful if you have
more details.  I looked carefully through wdma_usb.inf and I can't see
anything obvious.  From windows 10 in my case.

Max NG7M

On Sat, Aug 5, 2017 at 10:39 AM, Joe Subich, W4TV  wrote:

>
> On 8/5/2017 11:14 AM, Wes Stewart wrote:
>
>> But IMHO, you need to put a 30 dB attenuator on the input of the internal
>> sound card; it is way too sensitive. I'm having to run the Windows gain at
>> less than 5% and Line In at 10 or less.
>>
>
> Actually, you need to adjust the options in the Windows *.inf file
> used for the PCM-series CODEC (or use the codec that identifies as
> line level).  Windows is turning on a 20 dB preamp in the CODEC.
>
> I suspect if one sets the Windows Sound Options (Control Panel) to
> display dB rather than percentage, the minimum level will be some-
> thing like 16 to 20 dB!  That indicated the fixed 20 dB "mic preamp"
> is engaged.
>
> 73,
>
>... Joe, W4TV
>
>
> On 8/5/2017 11:14 AM, Wes Stewart wrote:
>
>> Wayne,
>>
>> There are no beat notes. These frequencies, at least from the FT8 program
>> in Tune mode are single frequency.  Based upon output RF spectrum
>> measurements*, with for example 1010 Hz input and 4-5 bars of ALC, I see
>> spurious or intermodulation sidebands, down -65 dBc.  If I change nothing
>> else but adjust the tone frequency to 1000 Hz  the spectrum is the same but
>> the ALC bars are cyclic, going from none to 4-5, at about the 2 HZ rate
>> Brian reported earlier. (Slow ALC in action?)  That's the good news.
>>
>> If I set the tone to 1500 Hz, the FT8 mid-band target, I'm presented with
>> the cyclic ALC and some ~193 Hz, -50 dBc sidebands.
>>
>> I have tried this with both the K3S internal sound card and via Line
>> In/Out into my laptop sound card.  The results are more-or-less the same.
>> But IMHO, you need to put a 30 dB attenuator on the input of the internal
>> sound card; it is way too sensitive.  I'm having to run the Windows gain at
>> less than 5% and Line In at 10 or less.
>>
>> I would suggest that you do some measurements with a low-distortion sine
>> wave audio source run into the radio to eliminate the possibility that this
>> junk is a result of all of the digitally generated tones.
>>
>> If this (what I will call a) problem continues to exist then I think a
>> fix is in order.  Expecting users to select particular frequencies to use
>> to set gain levels isn't an acceptable workaround.
>>
>> Regards,
>>
>> Wes  N7WS
>>
>>
>> * My "spectrum analyzer" is my SDR-IQ which I have used to measure TX IMD
>> on both my K3 and K3S.  Your IMD
>>   measurements on my K3S concurred with mine within 1 dB or less.
>>
>> On 8/4/2017 4:45 PM, Wayne Burdick wrote:
>>
>>> Is it possible that a beat note between tones (and their harmonics) is
>>> what’s modulating the ALC reading? If so, moving the tone slightly off the
>>> standard pitch may be an acceptable workaround.
>>>
>>> Wayne
>>> N6KR
>>>
>>>
>>> On Aug 4, 2017, at 1:42 PM, Wes Stewart  wrote:

 Good find Brian!!! I see it too in FT8.

 This probably explains the great variability in results reported. Some
 of us have a problem, others say, Huh, what the heck are you talking about?

 Wes, N7WS


 On 8/4/2017 11:33 AM, Brian Hunt wrote:

> Here's some followup:
> FLDIGI shows the "pumping" affect with carrier tones of 500, 1000,
> 1500, and 2000 Hz.
> WSJT-X 1.8 shows the "pumping" affect with carrier tones of 1000, 1500
> and 2000 Hz (couldn't select 500 Hz).
>
> The affect is very narrow with frequency.  10 Hz either way and the
> output and ALC display and MON output is rock solid.  Changing the K3
> filter center frequency has no effect on the above.
>
> 73,
> Brian, K0DTJ
>
> On 8/4/2017 10:58, Brian Hunt wrote:
>
>> I spent some quality time with my K3, FLDIGI and an oscilloscope
>> today.  I had the same problem as described.  Looking at my USB soundcard
>> output to the K3, the amplitude of the audio from FLDIGI in TUNE mode was
>> rock solid. Looking at the MON output from the K3, the level oscillated 
>> in
>> time with the ALC "pumping" at about 2.4 Hz (timed with a stop watch).  
>> At
>> the same time the K3 power output into a dummy load was rock solid at a
>> selected 10 watts.
>>
>> Then I changed the carrier frequency in FLDIGI slightly off 1500 Hz
>> and the "pumping" went away!  At 1515 Hz I could easily set the ALC to 
>> the
>> desired 4 bars solid, 5th flickering.  Then I remembered (and verified)
>> that the default filter center in DATA A mode is 1500 Hz. I changed the
>> 

Re: [Elecraft] K3: Odd ALC behavior

[Joe Subich, W4TV]

On 8/5/2017 11:14 AM, Wes Stewart wrote:
But IMHO, you need to put a 30 dB attenuator on the input of the 
internal sound card; it is way too sensitive. I'm having to run the 
Windows gain at less than 5% and Line In at 10 or less.


Actually, you need to adjust the options in the Windows *.inf file
used for the PCM-series CODEC (or use the codec that identifies as
line level).  Windows is turning on a 20 dB preamp in the CODEC.

I suspect if one sets the Windows Sound Options (Control Panel) to
display dB rather than percentage, the minimum level will be some-
thing like 16 to 20 dB!  That indicated the fixed 20 dB "mic preamp"
is engaged.

73,

   ... Joe, W4TV


On 8/5/2017 11:14 AM, Wes Stewart wrote:

Wayne,

There are no beat notes. These frequencies, at least from the FT8 
program in Tune mode are single frequency.  Based upon output RF 
spectrum measurements*, with for example 1010 Hz input and 4-5 bars of 
ALC, I see spurious or intermodulation sidebands, down -65 dBc.  If I 
change nothing else but adjust the tone frequency to 1000 Hz  the 
spectrum is the same but the ALC bars are cyclic, going from none to 
4-5, at about the 2 HZ rate Brian reported earlier. (Slow ALC in 
action?)  That's the good news.


If I set the tone to 1500 Hz, the FT8 mid-band target, I'm presented 
with the cyclic ALC and some ~193 Hz, -50 dBc sidebands.


I have tried this with both the K3S internal sound card and via Line 
In/Out into my laptop sound card.  The results are more-or-less the 
same.  But IMHO, you need to put a 30 dB attenuator on the input of the 
internal sound card; it is way too sensitive.  I'm having to run the 
Windows gain at less than 5% and Line In at 10 or less.


I would suggest that you do some measurements with a low-distortion sine 
wave audio source run into the radio to eliminate the possibility that 
this junk is a result of all of the digitally generated tones.


If this (what I will call a) problem continues to exist then I think a 
fix is in order.  Expecting users to select particular frequencies to 
use to set gain levels isn't an acceptable workaround.


Regards,

Wes  N7WS


* My "spectrum analyzer" is my SDR-IQ which I have used to measure TX 
IMD on both my K3 and K3S.  Your IMD

  measurements on my K3S concurred with mine within 1 dB or less.

On 8/4/2017 4:45 PM, Wayne Burdick wrote:
Is it possible that a beat note between tones (and their harmonics) is 
what’s modulating the ALC reading? If so, moving the tone slightly off 
the standard pitch may be an acceptable workaround.


Wayne
N6KR



On Aug 4, 2017, at 1:42 PM, Wes Stewart  wrote:

Good find Brian!!! I see it too in FT8.

This probably explains the great variability in results reported. 
Some of us have a problem, others say, Huh, what the heck are you 
talking about?


Wes, N7WS


On 8/4/2017 11:33 AM, Brian Hunt wrote:

Here's some followup:
FLDIGI shows the "pumping" affect with carrier tones of 500, 1000, 
1500, and 2000 Hz.
WSJT-X 1.8 shows the "pumping" affect with carrier tones of 1000, 
1500 and 2000 Hz (couldn't select 500 Hz).


The affect is very narrow with frequency.  10 Hz either way and the 
output and ALC display and MON output is rock solid.  Changing the 
K3 filter center frequency has no effect on the above.


73,
Brian, K0DTJ

On 8/4/2017 10:58, Brian Hunt wrote:
I spent some quality time with my K3, FLDIGI and an oscilloscope 
today.  I had the same problem as described.  Looking at my USB 
soundcard output to the K3, the amplitude of the audio from FLDIGI 
in TUNE mode was rock solid. Looking at the MON output from the K3, 
the level oscillated in time with the ALC "pumping" at about 2.4 Hz 
(timed with a stop watch).  At the same time the K3 power output 
into a dummy load was rock solid at a selected 10 watts.


Then I changed the carrier frequency in FLDIGI slightly off 1500 Hz 
and the "pumping" went away!  At 1515 Hz I could easily set the ALC 
to the desired 4 bars solid, 5th flickering.  Then I remembered 
(and verified) that the default filter center in DATA A mode is 
1500 Hz. I changed the filter center frequency to 1450 Hz and moved 
the FLDIGI frequency around but couldn't reproduce the "pumping".


I plan to repeat the same tests with WSJT-X 1.8 but wanted to get 
this out to the group.


73,
Brian, K0DTJ



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Re: [Elecraft] K3: Odd ALC behavior

[EUGENE GABRY]

I agree with Wes on his below statement. Same here exactly.


Gene

N9TF

> 
> On August 5, 2017 at 10:14 AM Wes Stewart  wrote:
> 
> 
> I have tried this with both the K3S internal sound card and via Line 
> In/Out into
> my laptop sound card. The results are more-or-less the same. But IMHO, you
> need to put a 30 dB attenuator on the input of the internal sound card; 
> it is
> way too sensitive. I'm having to run the Windows gain at less than 5% and 
> Line
> In at 10 or less.
> 
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Re: [Elecraft] OT Yamaha CM-500 ear pads

[Jorge Diez - CX6VM]

They offer free shipping, so dont need to wait, just change shipping options

73,
Jorge
CX6VM/CW5W


Libre
de virus. www.avast.com

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

2017-08-05 12:15 GMT-03:00 Jeff Griffin :

> News flash! If you don't complete your order at Koss and then wait a bit,
> you will get an email from them offering free shipping. So I turned around
> and ordered 2 set's for $10.00 with free shipping
>
>
> 73 Jeff kb2m
>
>
> -Original Message-
> From: Jeff Griffin [mailto:jeff_grif...@comcast.net]
> Sent: Saturday, August 5, 2017 9:38 AM
> To: 'elecraft@mailman.qth.net'
> Subject: RE: [Elecraft] OT Yamaha CM-500 ear pads
>
> I was also going to order a replacement set from Koss. The $5.00 I had no
> problem with, but the $12.95 to ship was a bit much. Now I'm also
> interested
> in a set of Beyerdynamics velour pads...
>
> 73 Jeff kb2m
>
> -Original Message-
> From: elecraft-boun...@mailman.qth.net
> [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Joe Subich, W4TV
> Sent: Saturday, August 5, 2017 9:12 AM
> To: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] OT Yamaha CM-500 ear pads
>
>
> On 8/5/2017 8:07 AM, Charlie T, K3ICH wrote:
> > If you get a set of Beyerdynamics velour pads, you'll never go back to
> > that flaky vinyl surface that OEM Yamaha and Sony use.
>
> What model number and have you actually tried them on the CM-500?
>
> I tried a couple of the generic replacements with the CM-500 and was never
> able to make them fit properly.  Still have my original CM-500 without
> earpads in the junk box until I find replacements that will fit.  I'm about
> to order the Koss replacements, but if I could get a higher quality version
> that *is known to fit*, I'd jump on them.
>
> 73,
>
> ... Joe, W4TV
>
>
> On 8/5/2017 8:07 AM, Charlie T, K3ICH wrote:
> > If you get a set of Beyerdynamics velour pads, you'll never go back to
> > that flaky vinyl surface that OEM Yamaha and Sony use.
> >
> > They may even be to exact same size too , so I'd bet the Sony type
> > will fit the CM-500. I have both and they look identical.
> >
> > They're a tad pricier at about $23  than the cheap Chicom replacements
> > and best price I've found on them is from Sweetwater Music.
> >
> > As a side note, I bought a cheap set of pads for a couple bucks, and
> > they ruined the sound of the Sony's, because they were too small and
> > didn't fit my ears properly.
> > They are now in the trash. The Beyerdynamics fit perfectly and are
> > very comfortable.
> >
> > 73, Charlie k3ICH
> >
> >
> >
> > -Original Message-
> > From: elecraft-boun...@mailman.qth.net
> > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of mpupeza mpupeza
> > Sent: Friday, August 04, 2017 11:47 PM
> > To: Bob Wilson, N6TV ; elecraft
> > 
> > Subject: Re: [Elecraft] OT Yamaha CM-500 ear pads
> >
> > Bob, et al,
> > I installed the Koss UR40 pads on the CM-500 headset. I can't remember
> > which video but the Yamaha and Koss are the same size pads.
> > 73
> > Mike VE3EQP .>
> >
> >> -- Original Message --
> >> From: "Bob Wilson, N6TV" 
> >> Date: August 4, 2017 at 9:45 PM
> >>
> >>
> >> Mike,
> >>
> >> Which video?  Are you installing the new UR40 pads on a CM500 or on a
> > KOSS?
> >>
> >> 73,
> >> Bob, N6TV
>
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> Message delivered to cx6vm.jo...@gmail.com
>



-- 
73,
Jorge
CX6VM/CW5W
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Re: [Elecraft] K3S ALC video

[Wes Stewart]

OK, I see it now.  What's the point?

Wes  N7WS

On 8/5/2017 7:27 AM, Bob McGraw K4TAX wrote:

Several have asked, this link should work.

73

Bob, K4TAX

K3S s/n 10163

https://www.dropbox.com/s/an06t907tx8xgid/Video%20Aug%2004%2C%208%2012%2025%20AM.mov?dl=0 



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[Elecraft] For Sale - Gamma Research HPS-1a

[pkhjr via Elecraft]

Very small power supply, used it to power my K3 and my KX3 wKXPA100 works as
it should.  Used in RV to conserve space.  Modified with PowerPole pigtail
instead of the molex.  Here's a review done by AD5X 
http://www.ad5x.com/images/Presentations/GammaHPS-1a.pdf

Asking $175 shipped consider trade for Elecraft SP3. Paypal preferred or
personal check.  Contact me offline.

73 Tex
k...@yahoo.com



--
View this message in context: 
http://elecraft.365791.n2.nabble.com/For-Sale-Gamma-Research-HPS-1a-tp7633123.html
Sent from the Elecraft mailing list archive at Nabble.com.
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Re: [Elecraft] OT Yamaha CM-500 ear pads

[Jeff Griffin]

News flash! If you don't complete your order at Koss and then wait a bit,
you will get an email from them offering free shipping. So I turned around
and ordered 2 set's for $10.00 with free shipping


73 Jeff kb2m


-Original Message-
From: Jeff Griffin [mailto:jeff_grif...@comcast.net] 
Sent: Saturday, August 5, 2017 9:38 AM
To: 'elecraft@mailman.qth.net'
Subject: RE: [Elecraft] OT Yamaha CM-500 ear pads

I was also going to order a replacement set from Koss. The $5.00 I had no
problem with, but the $12.95 to ship was a bit much. Now I'm also interested
in a set of Beyerdynamics velour pads...

73 Jeff kb2m

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Joe Subich, W4TV
Sent: Saturday, August 5, 2017 9:12 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] OT Yamaha CM-500 ear pads


On 8/5/2017 8:07 AM, Charlie T, K3ICH wrote:
> If you get a set of Beyerdynamics velour pads, you'll never go back to 
> that flaky vinyl surface that OEM Yamaha and Sony use.

What model number and have you actually tried them on the CM-500?

I tried a couple of the generic replacements with the CM-500 and was never
able to make them fit properly.  Still have my original CM-500 without
earpads in the junk box until I find replacements that will fit.  I'm about
to order the Koss replacements, but if I could get a higher quality version
that *is known to fit*, I'd jump on them.

73,

... Joe, W4TV


On 8/5/2017 8:07 AM, Charlie T, K3ICH wrote:
> If you get a set of Beyerdynamics velour pads, you'll never go back to 
> that flaky vinyl surface that OEM Yamaha and Sony use.
> 
> They may even be to exact same size too , so I'd bet the Sony type 
> will fit the CM-500. I have both and they look identical.
> 
> They're a tad pricier at about $23  than the cheap Chicom replacements 
> and best price I've found on them is from Sweetwater Music.
> 
> As a side note, I bought a cheap set of pads for a couple bucks, and 
> they ruined the sound of the Sony's, because they were too small and 
> didn't fit my ears properly.
> They are now in the trash. The Beyerdynamics fit perfectly and are 
> very comfortable.
> 
> 73, Charlie k3ICH
> 
> 
> 
> -Original Message-
> From: elecraft-boun...@mailman.qth.net 
> [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of mpupeza mpupeza
> Sent: Friday, August 04, 2017 11:47 PM
> To: Bob Wilson, N6TV ; elecraft 
> 
> Subject: Re: [Elecraft] OT Yamaha CM-500 ear pads
> 
> Bob, et al,
> I installed the Koss UR40 pads on the CM-500 headset. I can't remember 
> which video but the Yamaha and Koss are the same size pads.
> 73
> Mike VE3EQP .>
> 
>> -- Original Message --
>> From: "Bob Wilson, N6TV" 
>> Date: August 4, 2017 at 9:45 PM
>>
>>
>> Mike,
>>
>> Which video?  Are you installing the new UR40 pads on a CM500 or on a
> KOSS?
>>
>> 73,
>> Bob, N6TV

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Re: [Elecraft] K3: Odd ALC behavior

[Wes Stewart]

Wayne,

There are no beat notes. These frequencies, at least from the FT8 program in 
Tune mode are single frequency.  Based upon output RF spectrum measurements*, 
with for example 1010 Hz input and 4-5 bars of ALC, I see spurious or 
intermodulation sidebands, down -65 dBc.  If I change nothing else but adjust 
the tone frequency to 1000 Hz  the spectrum is the same but the ALC bars are 
cyclic, going from none to 4-5, at about the 2 HZ rate Brian reported earlier.  
(Slow ALC in action?)  That's the good news.


If I set the tone to 1500 Hz, the FT8 mid-band target, I'm presented with the 
cyclic ALC and some ~193 Hz, -50 dBc sidebands.


I have tried this with both the K3S internal sound card and via Line In/Out into 
my laptop sound card.  The results are more-or-less the same.  But IMHO, you 
need to put a 30 dB attenuator on the input of the internal sound card; it is 
way too sensitive.  I'm having to run the Windows gain at less than 5% and Line 
In at 10 or less.


I would suggest that you do some measurements with a low-distortion sine wave 
audio source run into the radio to eliminate the possibility that this junk is a 
result of all of the digitally generated tones.


If this (what I will call a) problem continues to exist then I think a fix is in 
order.  Expecting users to select particular frequencies to use to set gain 
levels isn't an acceptable workaround.


Regards,

Wes  N7WS


* My "spectrum analyzer" is my SDR-IQ which I have used to measure TX IMD on 
both my K3 and K3S.  Your IMD

 measurements on my K3S concurred with mine within 1 dB or less.

On 8/4/2017 4:45 PM, Wayne Burdick wrote:

Is it possible that a beat note between tones (and their harmonics) is what’s 
modulating the ALC reading? If so, moving the tone slightly off the standard 
pitch may be an acceptable workaround.

Wayne
N6KR



On Aug 4, 2017, at 1:42 PM, Wes Stewart  wrote:

Good find Brian!!! I see it too in FT8.

This probably explains the great variability in results reported. Some of us 
have a problem, others say, Huh, what the heck are you talking about?

Wes, N7WS


On 8/4/2017 11:33 AM, Brian Hunt wrote:

Here's some followup:
FLDIGI shows the "pumping" affect with carrier tones of 500, 1000, 1500, and 
2000 Hz.
WSJT-X 1.8 shows the "pumping" affect with carrier tones of 1000, 1500 and 2000 
Hz (couldn't select 500 Hz).

The affect is very narrow with frequency.  10 Hz either way and the output and 
ALC display and MON output is rock solid.  Changing the K3 filter center 
frequency has no effect on the above.

73,
Brian, K0DTJ

On 8/4/2017 10:58, Brian Hunt wrote:

I spent some quality time with my K3, FLDIGI and an oscilloscope today.  I had the same 
problem as described.  Looking at my USB soundcard output to the K3, the amplitude of the 
audio from FLDIGI in TUNE mode was rock solid. Looking at the MON output from the K3, the 
level oscillated in time with the ALC "pumping" at about 2.4 Hz (timed with a 
stop watch).  At the same time the K3 power output into a dummy load was rock solid at a 
selected 10 watts.

Then I changed the carrier frequency in FLDIGI slightly off 1500 Hz and the "pumping" 
went away!  At 1515 Hz I could easily set the ALC to the desired 4 bars solid, 5th flickering.  
Then I remembered (and verified) that the default filter center in DATA A mode is 1500 Hz. I 
changed the filter center frequency to 1450 Hz and moved the FLDIGI frequency around but couldn't 
reproduce the "pumping".

I plan to repeat the same tests with WSJT-X 1.8 but wanted to get this out to 
the group.

73,
Brian, K0DTJ



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[Elecraft] K3S ALC video

[Bob McGraw K4TAX]

Several have asked, this link should work.

73

Bob, K4TAX

K3S s/n 10163

https://www.dropbox.com/s/an06t907tx8xgid/Video%20Aug%2004%2C%208%2012%2025%20AM.mov?dl=0


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[Elecraft] KX2 Speaker... works fine now. Thanks

[sniels...@nc.rr.com]

Adjusting Monitor setting to 0 worked nicely.

Thank you,

Steve - KI4EZL
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Re: [Elecraft] KX2 - speaker relays ssb transmission???

[Don Wilhelm]

Steve,

Easy, just turn the MONitor volume to zero.

73,
Don W3FPR

On 8/5/2017 10:03 AM, sniels...@nc.rr.com wrote:

When I key my MH3 mic (on KX2) the radio keys, but also my speaker sends out my 
voice too.  I hear myself, loud, as I am transmitting.  What setting do I 
change to stop the transmission that I send, from come through the speaker too?

Steve - KI4EZL
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Re: [Elecraft] KX2 - speaker relays ssb transmission???

[kevino z]

You need to MONITOR level - read the manual and it has instructions.

No trees were killed in the sending of this message. However, a large number of 
electrons were terribly inconvenienced !

On Aug 5, 2017, at 10:05, "sniels...@nc.rr.com" 
> wrote:

When I key my MH3 mic (on KX2) the radio keys, but also my speaker sends out my 
voice too.  I hear myself, loud, as I am transmitting.  What setting do I 
change to stop the transmission that I send, from come through the speaker too?

Steve - KI4EZL
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[Elecraft] KX2 - speaker relays ssb transmission???

[sniels...@nc.rr.com]

When I key my MH3 mic (on KX2) the radio keys, but also my speaker sends out my 
voice too.  I hear myself, loud, as I am transmitting.  What setting do I 
change to stop the transmission that I send, from come through the speaker too?

Steve - KI4EZL
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[Elecraft] KX3 Heat Sink

[w4sc]

Hi Jim,

I purchased the PRO-Audio KX31 heat sink for my KX3.

After looking at the available designs at the time, the choices were narrowed 
to two. The KX31, and VE7 designs.  The larger ultimate KX32 and VE7,nor the 
improved Elecraft designs were available at the time.

The deciding reason I chose the KX31 over the available VE7 design was 
aesthetic.  I liked the “rounding over” of the dissipating fins and that the 
tool access to the mounting screws were on centers that did not cut through any 
fins.  The differences between the cost negligible, and performance, are 
extremely small.

73 de Ben W4SC
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Re: [Elecraft] OT Yamaha CM-500 ear pads

[Joe Subich, W4TV]

On 8/5/2017 8:07 AM, Charlie T, K3ICH wrote:
If you get a set of Beyerdynamics velour pads, you'll never go back 
to that flaky vinyl surface that OEM Yamaha and Sony use. 


What model number and have you actually tried them on the CM-500?

I tried a couple of the generic replacements with the CM-500 and was
never able to make them fit properly.  Still have my original CM-500
without earpads in the junk box until I find replacements that will
fit.  I'm about to order the Koss replacements, but if I could get a
higher quality version that *is known to fit*, I'd jump on them.

73,

   ... Joe, W4TV


On 8/5/2017 8:07 AM, Charlie T, K3ICH wrote:

If you get a set of Beyerdynamics velour pads, you'll never go back to that
flaky vinyl surface that OEM Yamaha and Sony use.

They may even be to exact same size too , so I'd bet the Sony type will fit
the CM-500. I have both and they look identical.

They're a tad pricier at about $23  than the cheap Chicom replacements and
best price I've found on them is from Sweetwater Music.

As a side note, I bought a cheap set of pads for a couple bucks, and they
ruined the sound of the Sony's, because they were too small and didn't fit
my ears properly.
They are now in the trash. The Beyerdynamics fit perfectly and are very
comfortable.

73, Charlie k3ICH



-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of mpupeza mpupeza
Sent: Friday, August 04, 2017 11:47 PM
To: Bob Wilson, N6TV ; elecraft 
Subject: Re: [Elecraft] OT Yamaha CM-500 ear pads

Bob, et al,
I installed the Koss UR40 pads on the CM-500 headset. I can't remember which
video but the Yamaha and Koss are the same size pads.
73
Mike VE3EQP .>


-- Original Message --
From: "Bob Wilson, N6TV" 
Date: August 4, 2017 at 9:45 PM


Mike,

Which video?  Are you installing the new UR40 pads on a CM500 or on a

KOSS?


73,
Bob, N6TV

On Fri, Aug 4, 2017 at 5:10 PM, mpupeza mpupeza 
wrote:


I ordered Koss UR40 cushions from Koss and they were $5.00 + $0.35
Tax (S+H
FREE) to my Winter Home in Florida. Perfect fit but snug and awkward
to install.
I looked how to do them on Youtube. There are several screws to
loosen under the rim of the old ones. They were mail delivered in
less than a week. Much cheaper than a new headset.
Mike VE3EQP .>

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Re: [Elecraft] OT Yamaha CM-500 ear pads

[Charlie T, K3ICH]

If you get a set of Beyerdynamics velour pads, you'll never go back to that
flaky vinyl surface that OEM Yamaha and Sony use.

They may even be to exact same size too , so I'd bet the Sony type will fit
the CM-500. I have both and they look identical.

They're a tad pricier at about $23  than the cheap Chicom replacements and
best price I've found on them is from Sweetwater Music.

As a side note, I bought a cheap set of pads for a couple bucks, and they
ruined the sound of the Sony's, because they were too small and didn't fit
my ears properly.
They are now in the trash. The Beyerdynamics fit perfectly and are very
comfortable.

73, Charlie k3ICH



-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of mpupeza mpupeza
Sent: Friday, August 04, 2017 11:47 PM
To: Bob Wilson, N6TV ; elecraft 
Subject: Re: [Elecraft] OT Yamaha CM-500 ear pads

Bob, et al,
I installed the Koss UR40 pads on the CM-500 headset. I can't remember which
video but the Yamaha and Koss are the same size pads.
73
Mike VE3EQP .>

> -- Original Message --
> From: "Bob Wilson, N6TV" 
> Date: August 4, 2017 at 9:45 PM
> 
> 
> Mike,
> 
> Which video?  Are you installing the new UR40 pads on a CM500 or on a
KOSS?
> 
> 73,
> Bob, N6TV
> 
> On Fri, Aug 4, 2017 at 5:10 PM, mpupeza mpupeza 
> wrote:
> 
> > I ordered Koss UR40 cushions from Koss and they were $5.00 + $0.35 
> > Tax (S+H
> > FREE) to my Winter Home in Florida. Perfect fit but snug and awkward 
> > to install.
> > I looked how to do them on Youtube. There are several screws to 
> > loosen under the rim of the old ones. They were mail delivered in 
> > less than a week. Much cheaper than a new headset.
> > Mike VE3EQP .>
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