[Elecraft] FS: K2/100

2020-10-21 Thread Tim Tucker
Listing this for a local ham W6KLE who is not on this list.  Contact info
is below:

--
Selling my elecraft K2 100 watts with KAT 100
10/80 meters built in DSP all filters real time clock and more
All manuals
Works great built by W3FPR, I'm the original owner
Very clean non smoking
1.600 shipping incl ships to the US lower 48 states only
pacs...@gmail.com

--


-- 
Owner, worldwidedx.com
AE6LX, Amateur Radio
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[Elecraft] [K2][K1] Legacy Tuneups, Rescue, Build Services

2020-10-21 Thread Alan D. Wilcox

  "W3DVX Rescues Legacy Elecrafts"

Hello,

Does your K1 or K2 need repair? Tuneup?
Want to sell, but it needs some attention before offering it for sale?
In addition to tuning your rig, I can also rescue a building project you 
might have started some time ago.


See what my clients have said about my construction and service work at 
http://www.eham.net/reviews/detail/6768
Photos of the popular "Twins" -- the KPA100 and KAT100 in EC2 enclosure 
-- are at

https://wilcoxengineering.com/kpa100-in-ec2/
Cheers,
Alan

Alan D. Wilcox, W3DVX (K2-5373, K3-40)
570-916-9590 (cell, text)
http://amazon.com/author/alandwilcox
Williamsport, PA 17701




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Re: [Elecraft] Fwd: Sunspots sunspots sunspots

2020-10-21 Thread Lyn Norstad
I saw a noticeable uptick on 15 meters, having made a total of 74 contacts
on 10/18 and 10/20 using FT8.

73
Lyn, W0LEN


-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Wayne Burdick
Sent: Wednesday, October 21, 2020 1:22 PM
To: Elecraft Reflector
Subject: [Elecraft] Fwd: Sunspots sunspots sunspots

Bonnie, KQ6XA, posted an encouraging update on sunspots to the HF Pack list.

I can't attach an image to this, but you can click on the provided URL which
shows activity for yesterday.

73,
Wayne
N6KR



> [hfpack] Sunspots sunspots sunspots
> 
> For those who haven't been tuning in to HF for a while, propagation is
improving!
> All the bands are hopping with signals today.
> Sunspots have been up at about 12 to 20 for about the past 11 days. 
> The solar flux is about 74, which is pretty good, compared to the past 3
years.
> The A index is currently at 4 (excellent). 
> The K index is currently at 1 (good).
> See sunspot graph attached. 
> -Bonnie KQ6XA
> 
> http://www.sidc.be/silso/DATA/EISN/EISNcurrent.png




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[Elecraft] Sunspots sunspots sunspots

2020-10-21 Thread Andy Durbin
Many more EU station on 15 m today than I have seen for a while.  17 m gave me 
a QSO with OD5KU for an ATNO earlier in the day.  Even earlier than that I 
worked JA on 160 m for the first time despite my hopelessly inadequate 5 ft agl 
antenna.

I thought my luck must have changed but I suppose sunspots could have been 
implicated.

73,
Andy, k3wyc
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Re: [Elecraft] Amplitude variation on K3S with JT65B

2020-10-21 Thread Jim Brown

On 10/21/2020 10:56 AM, Rick NK7I wrote:
Also the response of the sound card has some variation at different 
pitches (it's not a totally flat response), so try different tones.


If it does, it's broke, or a piece of crap.

73, Jim K9YC
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[Elecraft] Fwd: Sunspots sunspots sunspots

2020-10-21 Thread Wayne Burdick
Bonnie, KQ6XA, posted an encouraging update on sunspots to the HF Pack list.

I can't attach an image to this, but you can click on the provided URL which 
shows activity for yesterday.

73,
Wayne
N6KR



> [hfpack] Sunspots sunspots sunspots
> 
> For those who haven't been tuning in to HF for a while, propagation is 
> improving!
> All the bands are hopping with signals today.
> Sunspots have been up at about 12 to 20 for about the past 11 days. 
> The solar flux is about 74, which is pretty good, compared to the past 3 
> years.
> The A index is currently at 4 (excellent). 
> The K index is currently at 1 (good).
> See sunspot graph attached. 
> -Bonnie KQ6XA
> 
> http://www.sidc.be/silso/DATA/EISN/EISNcurrent.png 
> 



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[Elecraft] IF Shjft inoperative

2020-10-21 Thread Jim Spaulding


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Re: [Elecraft] Amplitude variation on K3S with JT65B

2020-10-21 Thread Rick NK7I
Fake It keeps the tones between 1500-2000 Hz. (not 1000) so that the 
harmonic energy is out of the passband.


Also the response of the sound card has some variation at different 
pitches (it's not a totally flat response), so try different tones.


73,
Rick NK7I


On 10/21/2020 6:19 AM, Dave wrote:

Conrad,

My friend just had the issue you described with a different brand radio. He was 
transmitting near the high end of the TX filter and on higher tones of the FT8 
the power would drop causing the TX power to waiver.

The fix for him was to enable Fake It in the WSJT-X radio settings tab. That 
keeps the TX audio centered between 1 kHz and 2 kHz. Well within the TX filter 
bandwidth.

Dave wo2x

Sent from my waxed string and tin cans.


On Oct 21, 2020, at 7:51 AM, Conrad PA5Y  wrote:

Hello while I wait for feedback from the (no doubt overwhelmed) Elecraft 
support I thought that I would ask the group about a problem that I have with 
my K3S.

When I run JT65B and even to a lesser extent FT8 I see unacceptable amplitude 
variation on both the 6m output and the transverter output (on 28MHz). If I put 
my E4406 Spectrum analyser on peak hold with a narrow span and 10Hz RBW I see 
amplitude variations of a little over 1dB on the modulation tones across the 
passband.

To save time.


  1.  On the ALC meter I have 4 bars lit up with the 5th occasionally 
flickering - the audio drive level is correct; it is not an ALC issue
  2.  I calibrated the TX drive - the effect is observed at 1mw, 5W, 50W and 
100W on 6m.
  3.  I am using DATA A so no TX EQ or compression
  4.  The audio has from WSJT-X been measured on a UPV audio analyser and there 
is less than 0.1dB variation when using a UMC404HD sound card
  5.  The effect is observed with both Line input drive and the UMC404HD 
soundcard and the internal K3S codec
  6.  My old TS2000X does not exhibit more than 0.1dB amplitude variation with 
the same sound card providing audio and the same test setup
  7.  I have verified the amplitude variations at RF with a diode detector and 
an oscilloscope
  8.  The effect is clearly visible on several power meters
  9.  This AM causes some spectral re-growth, although this is tolerable

So given all that I am beginning to wonder if the problem is due to filter 
ripple in the standard K3S 2.7kHz filter? I cannot think of anything else. I 
was considering buying an Inrad #718 filter.

This is very critical for EME when signals are weak at the RX side, if you have 
amplitude variations and you are at the threshold of detection at the receiving 
station this can cause decodes to fail. This is more important on 6m EME than 
2m where I have more margin.

I think that this will be quite common, has anybody else got a K3S and the 
equipment to check and verify my observations?

73

Conrad PA5Y
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Re: [Elecraft] Amplitude variation on K3S with JT65B

2020-10-21 Thread Jim Brown

On 10/21/2020 4:49 AM, Conrad PA5Y wrote:

So given all that I am beginning to wonder if the problem is due to filter 
ripple in the standard K3S 2.7kHz filter?


Many years ago, when I replaced stock 2.7kHz filters with 2.8 kHz 
filters in both my rigs, it significantly reduced the incidental AM I 
was seeing on RTTY.


73, Jim K9YC
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Re: [Elecraft] Amplitude variation on K3S with JT65B

2020-10-21 Thread Lou Mecseri
My K3 doing the same variation. Now I am running my K3, at 70% bellow 
100 watts so it will not push above the limit like I did with my KPA500. 
My KPA500 is back at the Elecraft hospital.


KE1F

On 10/21/2020 10:48 AM, Dr. William J. Schmidt wrote:

I have a K3 and a K3S at my Caribbean station... I see the same behavior on
my K3S but not on the K3.  I've calibrated it several times but have not
diagnosed it past that.  I've seen the power vary by as much as 50% at
times.


Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ

Owner - Operator
Big Signal Ranch – K9ZC
Staunton, Illinois

Owner – Operator
Villa Grand Piton – J68HZ
Soufriere, St. Lucia W.I.
Rent it: www.VillaGrandPiton.com
Like us on Facebook!

Moderator – North American QRO Group at Groups.IO.

email:  b...@wjschmidt.com


-Original Message-
From: elecraft-boun...@mailman.qth.net  On
Behalf Of Conrad PA5Y
Sent: Wednesday, October 21, 2020 6:50 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Amplitude variation on K3S with JT65B

Hello while I wait for feedback from the (no doubt overwhelmed) Elecraft
support I thought that I would ask the group about a problem that I have
with my K3S.

When I run JT65B and even to a lesser extent FT8 I see unacceptable
amplitude variation on both the 6m output and the transverter output (on
28MHz). If I put my E4406 Spectrum analyser on peak hold with a narrow span
and 10Hz RBW I see amplitude variations of a little over 1dB on the
modulation tones across the passband.

To save time.


   1.  On the ALC meter I have 4 bars lit up with the 5th occasionally
flickering - the audio drive level is correct; it is not an ALC issue
   2.  I calibrated the TX drive - the effect is observed at 1mw, 5W, 50W and
100W on 6m.
   3.  I am using DATA A so no TX EQ or compression
   4.  The audio has from WSJT-X been measured on a UPV audio analyser and
there is less than 0.1dB variation when using a UMC404HD sound card
   5.  The effect is observed with both Line input drive and the UMC404HD
soundcard and the internal K3S codec
   6.  My old TS2000X does not exhibit more than 0.1dB amplitude variation
with the same sound card providing audio and the same test setup
   7.  I have verified the amplitude variations at RF with a diode detector
and an oscilloscope
   8.  The effect is clearly visible on several power meters
   9.  This AM causes some spectral re-growth, although this is tolerable

So given all that I am beginning to wonder if the problem is due to filter
ripple in the standard K3S 2.7kHz filter? I cannot think of anything else. I
was considering buying an Inrad #718 filter.

This is very critical for EME when signals are weak at the RX side, if you
have amplitude variations and you are at the threshold of detection at the
receiving station this can cause decodes to fail. This is more important on
6m EME than 2m where I have more margin.

I think that this will be quite common, has anybody else got a K3S and the
equipment to check and verify my observations?

73

Conrad PA5Y
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Re: [Elecraft] Amplitude variation on K3S with JT65B

2020-10-21 Thread Dr. William J. Schmidt
I have a K3 and a K3S at my Caribbean station... I see the same behavior on
my K3S but not on the K3.  I've calibrated it several times but have not
diagnosed it past that.  I've seen the power vary by as much as 50% at
times.


Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ 

Owner - Operator
Big Signal Ranch – K9ZC
Staunton, Illinois

Owner – Operator
Villa Grand Piton – J68HZ
Soufriere, St. Lucia W.I.
Rent it: www.VillaGrandPiton.com
Like us on Facebook! 

Moderator – North American QRO Group at Groups.IO.

email:  b...@wjschmidt.com


-Original Message-
From: elecraft-boun...@mailman.qth.net  On
Behalf Of Conrad PA5Y
Sent: Wednesday, October 21, 2020 6:50 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Amplitude variation on K3S with JT65B

Hello while I wait for feedback from the (no doubt overwhelmed) Elecraft
support I thought that I would ask the group about a problem that I have
with my K3S.

When I run JT65B and even to a lesser extent FT8 I see unacceptable
amplitude variation on both the 6m output and the transverter output (on
28MHz). If I put my E4406 Spectrum analyser on peak hold with a narrow span
and 10Hz RBW I see amplitude variations of a little over 1dB on the
modulation tones across the passband.

To save time.


  1.  On the ALC meter I have 4 bars lit up with the 5th occasionally
flickering - the audio drive level is correct; it is not an ALC issue
  2.  I calibrated the TX drive - the effect is observed at 1mw, 5W, 50W and
100W on 6m.
  3.  I am using DATA A so no TX EQ or compression
  4.  The audio has from WSJT-X been measured on a UPV audio analyser and
there is less than 0.1dB variation when using a UMC404HD sound card
  5.  The effect is observed with both Line input drive and the UMC404HD
soundcard and the internal K3S codec
  6.  My old TS2000X does not exhibit more than 0.1dB amplitude variation
with the same sound card providing audio and the same test setup
  7.  I have verified the amplitude variations at RF with a diode detector
and an oscilloscope
  8.  The effect is clearly visible on several power meters
  9.  This AM causes some spectral re-growth, although this is tolerable

So given all that I am beginning to wonder if the problem is due to filter
ripple in the standard K3S 2.7kHz filter? I cannot think of anything else. I
was considering buying an Inrad #718 filter.

This is very critical for EME when signals are weak at the RX side, if you
have amplitude variations and you are at the threshold of detection at the
receiving station this can cause decodes to fail. This is more important on
6m EME than 2m where I have more margin.

I think that this will be quite common, has anybody else got a K3S and the
equipment to check and verify my observations?

73

Conrad PA5Y
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This email has been checked for viruses by AVG.
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Re: [Elecraft] Amplitude variation on K3S with JT65B

2020-10-21 Thread Dave
Conrad, 

My friend just had the issue you described with a different brand radio. He was 
transmitting near the high end of the TX filter and on higher tones of the FT8 
the power would drop causing the TX power to waiver. 

The fix for him was to enable Fake It in the WSJT-X radio settings tab. That 
keeps the TX audio centered between 1 kHz and 2 kHz. Well within the TX filter 
bandwidth. 

Dave wo2x

Sent from my waxed string and tin cans. 

> On Oct 21, 2020, at 7:51 AM, Conrad PA5Y  wrote:
> 
> Hello while I wait for feedback from the (no doubt overwhelmed) Elecraft 
> support I thought that I would ask the group about a problem that I have with 
> my K3S.
> 
> When I run JT65B and even to a lesser extent FT8 I see unacceptable amplitude 
> variation on both the 6m output and the transverter output (on 28MHz). If I 
> put my E4406 Spectrum analyser on peak hold with a narrow span and 10Hz RBW I 
> see amplitude variations of a little over 1dB on the modulation tones across 
> the passband.
> 
> To save time.
> 
> 
>  1.  On the ALC meter I have 4 bars lit up with the 5th occasionally 
> flickering - the audio drive level is correct; it is not an ALC issue
>  2.  I calibrated the TX drive - the effect is observed at 1mw, 5W, 50W and 
> 100W on 6m.
>  3.  I am using DATA A so no TX EQ or compression
>  4.  The audio has from WSJT-X been measured on a UPV audio analyser and 
> there is less than 0.1dB variation when using a UMC404HD sound card
>  5.  The effect is observed with both Line input drive and the UMC404HD 
> soundcard and the internal K3S codec
>  6.  My old TS2000X does not exhibit more than 0.1dB amplitude variation with 
> the same sound card providing audio and the same test setup
>  7.  I have verified the amplitude variations at RF with a diode detector and 
> an oscilloscope
>  8.  The effect is clearly visible on several power meters
>  9.  This AM causes some spectral re-growth, although this is tolerable
> 
> So given all that I am beginning to wonder if the problem is due to filter 
> ripple in the standard K3S 2.7kHz filter? I cannot think of anything else. I 
> was considering buying an Inrad #718 filter.
> 
> This is very critical for EME when signals are weak at the RX side, if you 
> have amplitude variations and you are at the threshold of detection at the 
> receiving station this can cause decodes to fail. This is more important on 
> 6m EME than 2m where I have more margin.
> 
> I think that this will be quite common, has anybody else got a K3S and the 
> equipment to check and verify my observations?
> 
> 73
> 
> Conrad PA5Y
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[Elecraft] Amplitude variation on K3S with JT65B

2020-10-21 Thread Conrad PA5Y
Hello while I wait for feedback from the (no doubt overwhelmed) Elecraft 
support I thought that I would ask the group about a problem that I have with 
my K3S.

When I run JT65B and even to a lesser extent FT8 I see unacceptable amplitude 
variation on both the 6m output and the transverter output (on 28MHz). If I put 
my E4406 Spectrum analyser on peak hold with a narrow span and 10Hz RBW I see 
amplitude variations of a little over 1dB on the modulation tones across the 
passband.

To save time.


  1.  On the ALC meter I have 4 bars lit up with the 5th occasionally 
flickering - the audio drive level is correct; it is not an ALC issue
  2.  I calibrated the TX drive - the effect is observed at 1mw, 5W, 50W and 
100W on 6m.
  3.  I am using DATA A so no TX EQ or compression
  4.  The audio has from WSJT-X been measured on a UPV audio analyser and there 
is less than 0.1dB variation when using a UMC404HD sound card
  5.  The effect is observed with both Line input drive and the UMC404HD 
soundcard and the internal K3S codec
  6.  My old TS2000X does not exhibit more than 0.1dB amplitude variation with 
the same sound card providing audio and the same test setup
  7.  I have verified the amplitude variations at RF with a diode detector and 
an oscilloscope
  8.  The effect is clearly visible on several power meters
  9.  This AM causes some spectral re-growth, although this is tolerable

So given all that I am beginning to wonder if the problem is due to filter 
ripple in the standard K3S 2.7kHz filter? I cannot think of anything else. I 
was considering buying an Inrad #718 filter.

This is very critical for EME when signals are weak at the RX side, if you have 
amplitude variations and you are at the threshold of detection at the receiving 
station this can cause decodes to fail. This is more important on 6m EME than 
2m where I have more margin.

I think that this will be quite common, has anybody else got a K3S and the 
equipment to check and verify my observations?

73

Conrad PA5Y
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[Elecraft] K2 RF Gain Potentiometer

2020-10-21 Thread Ray Spreadbury via Elecraft
I have just got a secondhand K2 # 5835 and find that the RF Gain pot needs 
replacing. The component is available from Elecraft but the shipping cost to 
the UK and the likely long delay means that I would prefer to source this here 
or in Europe from Mouser UK or similar supplier if possible.
I know it’s a 5K linear pot but does anyone know a Mouser part number or other 
supplier please?
Would it be a good idea to replace the 3 other identical pots at the same time?
Similarly does anyone know the Mouser part number for the 5K audio taper AF 
Gain pot?
73
Ray G3XLG

Sent from Mail for Windows 10

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