[Elecraft] OT- AOR clearance items

[Johnny Siu]

Hello elecrafters,
 
It is definitely off-topic.
 
A local ham asked me to post this for him.  All the items have to be sold at 
one go. 
   
Model  Description  Qty   
ADO-D88I  D88I ADONIS Microphone Cable  2   
ADO-D88MI  D88MI ADONIS Microphone Cable  1   
AOR-AA8000CE  AA8000CE AOR AC Adaptor (*AR8200MK3)  28   
AOR-AR300  AR-300 AOR Trans. View Camera (NTSC)  8   
AOR-AR300-CABLE(I)  Cable from AOR AR300 to Icom Radio  3   
AOR-AR300-CABLE(K)  Cable from AOR AR300 to Kenwood Radio  2   
AOR-AR300-CABLE(M)  Cable from AOR AR300 to Motorola Radio  5   
AOR-AR300-CABLE(Y)  Cable from AOR AR300 to Yaesu Radio  3   
AOR-CR8000  CR-8000 Recording Lead (*AR8000)  5   
AOR-CU8232  CU-8232 AOR I/F (*AR8000)  3   
AOR-SPECTRUM-MASTER  AOR Spectrum Master Software (CD)  1   
　  (*AR5000/+3 / AR5000A/A+3 Receivers)  　 
Total price (excluding shipping):US$650.00 

   

If you are interested, please email me off-the-list.  I apologise the QRM 
caused here.


TNX & 73,
Johnny VR2XMC
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Re: [Elecraft] [K3] Audio circuit distortion

[Jim Brown]

On 7/23/2013 12:15 PM, Don Putnick wrote:

It didn't compete with the <0.3% distortion of the Icom 756 Pro III.


Single numbers like this are quite inadequate to describe distortion. 
There are MANY kinds, and many manifestations. THD is a particularly 
poor metric for non-linearity, because some orders of harmonics are FAR 
more audible (and unpleasant) than others, and also because it does not 
include intermodulation. For example, there's a popular audio signal 
processing tool that includes a knob called "warmth."  It ADDS 2nd 
harmonic distortion. In general, higher order harmonics are audible are 
MUCH lower levels because they are relatively un-musical.  Digital 
distortions are also quite audible,and at relatively low levels, again 
because they are not naturally part of speech or music.


I'm quite satisfied with the audio quality of the K3 once those early 
issues were corrected. I've got a nice stereo rig to listen to music, 
most of which is acoustic jazz. I completely agree with Wayne's design 
priorities.


73, Jim K9YC
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[Elecraft] [K3] Audio circuit distortion

[Don Putnick]

To the three of you who took my question seriously, thank you for your answers.
To the rest, you're welcome for the opportunity to have some fun.
73 Don NA6Z
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Re: [Elecraft] KAT500 Assembly Question

[Ron D'Eau Claire]

Yep, and an errata to the kit assy manual has been created. Thanks for the
comment.

73, Ron AC7AC

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ian Kahn - Ham
Sent: Tuesday, July 23, 2013 4:53 PM
To: gdaug...@stanford.edu; elecraft@mailman.qth.net
Subject: Re: [Elecraft] KAT500 Assembly Question

All,

Thanks for the quick responses. Dick Dievendorff got back to me and
confirmed what everyone told me - use the pan head screw.

73,

--Ian
Ian Kahn, KM4IK
Roswell, GA  EM74ua
km4ik@gmail.com
K3 #281, P3 #688, KPA500 #1468
HRD v5.x/6.0 Test Team

-Original Message-
From: gdaug...@stanford.edu [mailto:gdaug...@stanford.edu]
Sent: Tuesday, July 23, 2013 5:19 PM
To: Ian Kahn - Ham
Subject: Re: [Elecraft] KAT500 Assembly Question

> I'm assembling KAT500 s/n 860 and have reached the step where I attach 
> the L-bracket at LB1 on the circuit board.  The instructions don't 
> specify whether the 3/16" 4-40 screw used is flat head or pan head.
> Can anyone who has assembled the KAT500 offer guidance?  I'm waiting 
> on Elecraft support for an answer, but am impatient to get this 
> finished and installed with the rest of my K-Line today/tonight.

Usually the hole is countersunk if the intent is to use a flat head screw.
If the hole is NOT countersunk, I'd use a pan head, so long as the head
standing proud of the surface will not interfere with some other part(s).

73,

George T Daughters, K6GT
CU in the California QSO Party (CQP)
October 5-6, 2013



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Re: [Elecraft] Fw: HIgh swr on 6m

[Vic K2VCO]

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Re: [Elecraft] Fw: HIgh swr on 6m

[Edward R Cole]

I have seen higher SWR with amplifiers connected in-line but not 
energized.  It seems I saw this in recent tests I made with my Mirage 
A1015G (10w/150w), so I did a quick check.


I ran 5w with the K3/10 so I could use the 5A element (25-60 MHz) in 
my Bird power meter and tested into a dummy load to start with.


had 1.0 SWR indicated by the K3 and zero reflected showing on the 
Bird with power adjusted exactly to 5w forward.  Then I inserted the 
6m PA and got exactly the same readings.  I did see forward power 
shift about 0.2w so its not a perfect match.


I repeated the test with my 3-element 6m yagi as load.  Straight 
connection shows 0.25w reflected and SWR=1.5.  I got exactly the same 
measurements when the amp was inserted.


I would not have been surprised to see a change in readings with the 
antenna load since it is not a perfect match.  Getting a good match 
is often not realized with the open frame relays that are commonly 
used in ham amplifiers

---
While I had everything set up I decided to measure the amp output 
with my 100H and 500H elements.   With 6w drive I found I get 100w 
output showing with the 100H and 110w showing with the 500H.  With 
power set to full output of 8w 130w is displayed with the 500H 
element.  I typically claim it will do 125w.


Subject: Re: [Elecraft] Fw: HIgh swr on 6m
Message-ID:
<1374596684.57332.yahoomail...@web181002.mail.ne1.yahoo.com>
Content-Type: text/plain; charset=iso-8859-1

Stewart, do you have an amplifier attached? ?I have found that having 
my Clipperton L in the circuit causes high SWR on 6 meters, but if I 
connect direct to the antenna switch the SWR on my SteppIR is low as 
it should be. ?

?
Willis 'Cookie' Cooke
K5EWJ & Trustee N5BPS, USS Cavalla, USS Stewart

73, Ed - KL7UW
http://www.kl7uw.com
dubus...@gmail.com
"Kits made by KL7UW" 


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Re: [Elecraft] [K3] Audio circuit distortion

[David Gilbert]

So very true.  Three or four years ago a midwest ham called me during 
the NAQP SSB contest with an almost unreadable S9+10 signal. I managed 
to decipher enough of his callsign to return to him, and I told him he 
needed to back off his mic gain.  He did and it helped, and by the time 
I got him to where he was perfectly readable and not distorting any 
worse than anyone else he was down to about S8.  I told him he should 
leave it there, but I'll bet $100 he didn't.


It's a wonder some manufacturer hasn't put out a rig with knobs that go 
up to 11.


73,
Dave   AB7E



On 7/23/2013 2:25 PM, Doug Person wrote:
 Unless you were listening to FM broadcast, how could you possibly 
appreciate a .3% THD?  I always assumed anything less than 1% was more 
than adequate for our kind of communications.  If we get down to this 
level of performance, we'll need to work on the 50% or so of stations 
that only concern themselves with output power - not audio quality.  
There is a lot of dreadfully distorted signals on 20 meter SSB.  
Nothing beats working a station that is s9+20 and barely 
understandable because he has compression and mic gain pushed up so he 
sees 1500 watts on his output meter all the time.



73, Doug -- K0DXV


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Re: [Elecraft] [K3] Audio circuit distortion

[David Gilbert]

Or how about this.  You can buy mattresses with magnets installed in 
them for "magneto-therapy" while you sleep, and you can also buy totally 
non-ferrous mattresses (at outrageous prices) so that they won't harm 
your health by distorting the earth's natural magnetic field.


No wonder the aliens have decided we are worth visiting ...

73,
Dave   AB7E






On 7/23/2013 2:47 PM, Ron D'Eau Claire wrote:

And there are those who spend hundreds of dollars on a-c power cords for
their audio systems that have been cryogenically treated to "align the
copper crystals to avoid turbulence in the a-c power flowing through the
cord from the wall outlet".

The problem is that human perception determines satisfaction, and perception
is not always based on objective data.

73, Ron AC7AC



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Re: [Elecraft] [K3] Audio circuit distortion

[K0TNT]

I had an industrial electronics distributor swear to me that his speaker 
cables needed to be "broken in", sounded too "bright" until they had 
been used for a week. They also had to be very large because of the AC 
Skin Effect. Thin wires just didn't sound good.
One morning, as a joke, I came into his office with my jumper cables and 
said, "Mitch, I have your new speaker cables right here!" He actually 
thought about it for a couple of seconds.
Never could convince him that he was chasing ghosts. But the laughs were 
worth it.


73, Carl K0TNT


On 7/23/2013 6:39 PM, David Christ wrote:

I haven't laughed so hard in a long time.  How ignorant their customers must 
be.  I really enjoyed the 4 for $115 covers for your wall outlets that would 
keep RFI out of the wiring.  Wonder if they would cure RF feedback :-).  So 
much for the laws of physics.



The people who write the ad copy for this stuff probably have second jobs 
writing political ads.

David K0LUM


On Jul 23, 2013, at 5:20 PM, Frank Precissi wrote:


You have got to be kidding me:

http://www.revolutionpower.com/p/Oyaide+Li50EXs+Power+Cable+1.8m/151/

http://www.revolutionpower.com/p/Oyaide+Tunami+GPX-R+004+Power+Cable/274/

Its to the point where it blurs the line between over-the-top serious and a
joke.  $500 power cable to feed mediocre caps and transformers in an amp.

-Frank
KG6EYC



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Re: [Elecraft] [K3] Audio circuit distortion

[Goldtr8 (KD8NNU)]

I think the rain and fog has gone to their heads.  LOL



~73
Don
KD8NNU
-.- -.. ---.. -. -. ..-
-Original Message- 
From: David Christ

Sent: Tuesday, July 23, 2013 7:39 PM
To: Elecraft Group
Subject: Re: [Elecraft] [K3] Audio circuit distortion

I haven't laughed so hard in a long time.  How ignorant their customers must 
be.  I really enjoyed the 4 for $115 covers for your wall outlets that would 
keep RFI out of the wiring.  Wonder if they would cure RF feedback :-).  So 
much for the laws of physics.




The people who write the ad copy for this stuff probably have second jobs 
writing political ads.


David K0LUM


On Jul 23, 2013, at 5:20 PM, Frank Precissi wrote:


You have got to be kidding me:

http://www.revolutionpower.com/p/Oyaide+Li50EXs+Power+Cable+1.8m/151/

http://www.revolutionpower.com/p/Oyaide+Tunami+GPX-R+004+Power+Cable/274/

Its to the point where it blurs the line between over-the-top serious and 
a

joke.  $500 power cable to feed mediocre caps and transformers in an amp.

-Frank
KG6EYC




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Re: [Elecraft] KAT500 Assembly Question

[Ian Kahn - Ham]

All,

Thanks for the quick responses. Dick Dievendorff got back to me and
confirmed what everyone told me - use the pan head screw.

73,

--Ian 
Ian Kahn, KM4IK
Roswell, GA  EM74ua
km4ik@gmail.com
K3 #281, P3 #688, KPA500 #1468
HRD v5.x/6.0 Test Team

-Original Message-
From: gdaug...@stanford.edu [mailto:gdaug...@stanford.edu] 
Sent: Tuesday, July 23, 2013 5:19 PM
To: Ian Kahn - Ham
Subject: Re: [Elecraft] KAT500 Assembly Question

> I'm assembling KAT500 s/n 860 and have reached the step where I attach 
> the L-bracket at LB1 on the circuit board.  The instructions don't 
> specify whether the 3/16" 4-40 screw used is flat head or pan head.  
> Can anyone who has assembled the KAT500 offer guidance?  I'm waiting 
> on Elecraft support for an answer, but am impatient to get this 
> finished and installed with the rest of my K-Line today/tonight.

Usually the hole is countersunk if the intent is to use a flat head screw.
If the hole is NOT countersunk, I'd use a pan head, so long as the head
standing proud of the surface will not interfere with some other part(s).

73,

George T Daughters, K6GT
CU in the California QSO Party (CQP)
October 5-6, 2013



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Re: [Elecraft] [K3] Audio circuit distortion

[David Christ]

I haven't laughed so hard in a long time.  How ignorant their customers must 
be.  I really enjoyed the 4 for $115 covers for your wall outlets that would 
keep RFI out of the wiring.  Wonder if they would cure RF feedback :-).  So 
much for the laws of physics.



The people who write the ad copy for this stuff probably have second jobs 
writing political ads.

David K0LUM


On Jul 23, 2013, at 5:20 PM, Frank Precissi wrote:

> You have got to be kidding me:
> 
> http://www.revolutionpower.com/p/Oyaide+Li50EXs+Power+Cable+1.8m/151/
> 
> http://www.revolutionpower.com/p/Oyaide+Tunami+GPX-R+004+Power+Cable/274/
> 
> Its to the point where it blurs the line between over-the-top serious and a
> joke.  $500 power cable to feed mediocre caps and transformers in an amp.
> 
> -Frank
> KG6EYC
> 
> 

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Re: [Elecraft] [K3] Audio circuit distortion

[David Gilbert]

I have to admit that I didn't realize mechanical vibrations at the wall 
socket were such a problem.


http://www.revolutionpower.com/p/Oyaide+WPC-Z+Faceplate/58/ ($249.00)

Actually, I respect this company for it's audacity and for the economic 
Darwinism it promotes.;)


73,
Dave   AB7E



On 7/23/2013 3:07 PM, Wes (N7WS) wrote:
Speaking of P.T. Barnum, here are his offspring: 
http://www.revolutionpower.com/o/Oyaide/


I'll bet that the people who buy this crap would be aghast to know 
that the power company has supplied their AC power through oxidized 
aluminum wire and some of those electrons came from nuclear power 
plants and are radioactive!!!.






On 7/23/2013 2:50 PM, Brian Hemmis wrote:

Now they are even selling high end FUSES for your audio gear !
PT Barnum was right ...

Brian K3USC



On Jul 23, 2013, at 5:47 PM, Ron D'Eau Claire  wrote:

And there are those who spend hundreds of dollars on a-c power cords 
for

their audio systems that have been cryogenically treated to "align the
copper crystals to avoid turbulence in the a-c power flowing through 
the

cord from the wall outlet".

The problem is that human perception determines satisfaction, and 
perception

is not always based on objective data.

73, Ron AC7AC

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Doug Person
Sent: Tuesday, July 23, 2013 2:25 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] [K3] Audio circuit distortion

I once wired a guy's $20K audio system with RG8.  He claimed it made 
all the
difference.  He also claimed that vinyl was vastly superior to 
CD's.  I told
him he had a wonderful imagination.  The very best and cleanest 
vinyl with a
radial tracking arm turntable and a top of the line cartridge could 
just
barely make a 40db s/n.  Digital audio can do 100db anytime. Many 
years of
selling audio gear taught me about the psychology of hearing. It 
takes an
experienced ear to appreciate a truly flat response. Most people 
prefer a

very unbalanced equalization.
I got lots of chuckles switching between a $300 system and a $3000 
system

and having most people prefer the cheap setup.

Having designed loud speakers professionally (of which 1,000s were 
sold), I

am equipped with very refined and experienced hearing. Unless you were
listening to FM broadcast, how could you possibly appreciate a .3% 
THD?  I
always assumed anything less than 1% was more than adequate for our 
kind of
communications.  If we get down to this level of performance, we'll 
need to
work on the 50% or so of stations that only concern themselves with 
output
power - not audio quality.  There is a lot of dreadfully distorted 
signals
on 20 meter SSB.  Nothing beats working a station that is s9+20 and 
barely
understandable because he has compression and mic gain pushed up so 
he sees

1500 watts on his output meter all the time.

So, IMHO, the K3 has absolutely splendid audio when I have a chance 
to work
another station whose audio is actually adjusted correctly. It 
amazes me

that most rigs today have a monitor function.  Must be the most unused
feature of all time.

73, Doug -- K0DXV


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Re: [Elecraft] Optimum Monitor for the P3 SVGA?

[Ron D'Eau Claire]

It was pointed out to me that the resolution of the Acer 20 inch monitor is
not mentioned. I run mine at 1280x1024

It does not support 1440X900.

73, Ron AC7AC

-Original Message-


I just grabbed an Acer 20 inch that was on sale for under $100 at a local
store. 

20-inch (diagonal) Widescreen LED
Dynamic contrast : Dynamic: 12,000,000:1 Native: 1,000:1 Viewing Angles (CR
= 10) : Horizonal: 170° Vertical: 160°
Ports: VGA & DVI with HDCP
5ms response time

http://tinyurl.com/kl82klk (compressed URL to Amazon.com offering)

I prefer LED types having had enough fluorescent backlights die on me over
the years, Hi! 

Works FB for me. Of course, the size depends on how much space you have, how
far away from you it is placed, etc. Mine is about 2 feet from me. 

73, Ron AC7AC

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[Elecraft] FS K3, KPA500, KAT500, cables and various accessories

[RANDY DIDDEL]

Hi group,

K3/100F SN7170 with KAT3K, 8 Pole KFL3A-2.8K SSB filter
AUX Control cables from K3 to KPA500 and KPA500
KAT500F SN 298
KPA500K SN 1213
USB control cables for CAT functionality.
SignaLink USB and K3 cables/internal K3 jumper.
All corresponding manuals and literature.

All components have the latest production firmware installed.

All parts were purchased between 12/2012 and 2/2013 so they look and perform 
like new.

Almost 6,000 invested. Want to sell as a set and not part it out. 4800.00 
Shipped and insured. Cashier’s check drawn on a major bank (pieces shipped when 
check clears), or Paypal +3%.

Pictures of the rig and parts here: 
http://randydiddel.wordpress.com/2013/07/22/elecraft-k3-and-accessories-for-sale/


If you would like we might be able to set up a Sked with it as it is all 
currently hooked up in my shack.

Please contact off list at k5rhd...@gmail.com   

73

K5RHD

/randy
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Re: [Elecraft] [K3] Audio circuit distortion

[Frank Precissi]

You have got to be kidding me:

http://www.revolutionpower.com/p/Oyaide+Li50EXs+Power+Cable+1.8m/151/

http://www.revolutionpower.com/p/Oyaide+Tunami+GPX-R+004+Power+Cable/274/

Its to the point where it blurs the line between over-the-top serious and a
joke.  $500 power cable to feed mediocre caps and transformers in an amp.

-Frank
KG6EYC


On Tue, Jul 23, 2013 at 3:07 PM, Wes (N7WS)  wrote:

> Speaking of P.T. Barnum, here are his offspring:
> http://www.revolutionpower.**com/o/Oyaide/
>
> I'll bet that the people who buy this crap would be aghast to know that
> the power company has supplied their AC power through oxidized aluminum
> wire and some of those electrons came from nuclear power plants and are
> radioactive!!!.
>
>
>
>
>
>
> On 7/23/2013 2:50 PM, Brian Hemmis wrote:
>
>> Now they are even selling high end FUSES for your audio gear !
>> PT Barnum was right ...
>>
>> Brian K3USC
>>
>>
>>
>> On Jul 23, 2013, at 5:47 PM, Ron D'Eau Claire  wrote:
>>
>>  And there are those who spend hundreds of dollars on a-c power cords for
>>> their audio systems that have been cryogenically treated to "align the
>>> copper crystals to avoid turbulence in the a-c power flowing through the
>>> cord from the wall outlet".
>>>
>>> The problem is that human perception determines satisfaction, and
>>> perception
>>> is not always based on objective data.
>>>
>>> 73, Ron AC7AC
>>>
>>> -Original Message-
>>> From: elecraft-boun...@mailman.qth.**net
>>> [mailto:elecraft-bounces@**mailman.qth.net]
>>> On Behalf Of Doug Person
>>> Sent: Tuesday, July 23, 2013 2:25 PM
>>> To: elecraft@mailman.qth.net
>>> Subject: Re: [Elecraft] [K3] Audio circuit distortion
>>>
>>> I once wired a guy's $20K audio system with RG8.  He claimed it made all
>>> the
>>> difference.  He also claimed that vinyl was vastly superior to CD's.  I
>>> told
>>> him he had a wonderful imagination.  The very best and cleanest vinyl
>>> with a
>>> radial tracking arm turntable and a top of the line cartridge could just
>>> barely make a 40db s/n.  Digital audio can do 100db anytime.  Many years
>>> of
>>> selling audio gear taught me about the psychology of hearing.  It takes
>>> an
>>> experienced ear to appreciate a truly flat response. Most people prefer a
>>> very unbalanced equalization.
>>> I got lots of chuckles switching between a $300 system and a $3000 system
>>> and having most people prefer the cheap setup.
>>>
>>> Having designed loud speakers professionally (of which 1,000s were
>>> sold), I
>>> am equipped with very refined and experienced hearing. Unless you were
>>> listening to FM broadcast, how could you possibly appreciate a .3% THD?
>>>  I
>>> always assumed anything less than 1% was more than adequate for our kind
>>> of
>>> communications.  If we get down to this level of performance, we'll need
>>> to
>>> work on the 50% or so of stations that only concern themselves with
>>> output
>>> power - not audio quality.  There is a lot of dreadfully distorted
>>> signals
>>> on 20 meter SSB.  Nothing beats working a station that is s9+20 and
>>> barely
>>> understandable because he has compression and mic gain pushed up so he
>>> sees
>>> 1500 watts on his output meter all the time.
>>>
>>> So, IMHO, the K3 has absolutely splendid audio when I have a chance to
>>> work
>>> another station whose audio is actually adjusted correctly.  It amazes me
>>> that most rigs today have a monitor function.  Must be the most unused
>>> feature of all time.
>>>
>>> 73, Doug -- K0DXV
>>>
>>
> __**__**__
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-- 
CW: NAQCC #6554 | SKCC #10435 | FISTS #16155 | SOC #1038 | FP #3186
Digital: FHC #4224 | 30MDG #6370 | DMC #5698
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Re: [Elecraft] Optimum Monitor for the P3 SVGA?

[Tom]

One caveat with the 1920x1080. Not all monitors work correctly. I have 4 sell 
monitors none of which work right.
Tom

Sent from my iPhone

On 2013-07-23, at 5:28 PM, Dave Hachadorian  wrote:

> Resolution 1920 x 1080, the bigger the better.  I have two K3/P3's with two 
> 23" monitors.  The wider they are, the more bandwidth you can monitor without 
> scrunching all the signals together.  The higher they are, the more time 
> history you can see.
> 
> You can get a 23" 1920 x 1080 monitor for about $120 any time on Amazon.  If 
> you hunt for sales, you can do even better.  Mine are Dell refurbs that I got 
> for $75 on sale (not currently available).
> 
> Dave Hachadorian, K6LL
> Big Bear Lake, CA
> 
> 
> 
> -Original Message- From: ato...@cybermesa.com
> Sent: Tuesday, July 23, 2013 1:10 PM
> To: elecraft@mailman.qth.net
> Subject: [Elecraft] Optimum Monitor for the P3 SVGA?
> 
> I have recently received the P3SVGA and need to procure a suitable
> monitor. Are there any preferences of one size and/or resolution over
> another?
> 
> Alden Oyer, AG5S
> 
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Re: [Elecraft] [K3] Audio circuit distortion

[Wes (N7WS)]

Like me, he's retired now and a he's one of group of we retirees who get 
together once a month for lunch.  I'll pass along your offer.



On 7/23/2013 2:22 PM, Wayne Burdick wrote:

"Wes (N7WS)" wrote:


Are you one of those guys who can hear the difference in speaker wire?

Don't I wish.



I had a guy working for me who was a musician and audiophile who claimed he 
could tell the difference.  I referred him to Bob Pease.

If you find another one, refer him to us. We'll give him the work bench that 
includes a crystal ball and divining rod.

Wayne
N6KR


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Re: [Elecraft] [K3] Audio circuit distortion

[Wes (N7WS)]

Speaking of P.T. Barnum, here are his offspring:  
http://www.revolutionpower.com/o/Oyaide/


I'll bet that the people who buy this crap would be aghast to know that the 
power company has supplied their AC power through oxidized aluminum wire and 
some of those electrons came from nuclear power plants and are radioactive!!!.






On 7/23/2013 2:50 PM, Brian Hemmis wrote:

Now they are even selling high end FUSES for your audio gear !
PT Barnum was right ...

Brian K3USC



On Jul 23, 2013, at 5:47 PM, Ron D'Eau Claire  wrote:


And there are those who spend hundreds of dollars on a-c power cords for
their audio systems that have been cryogenically treated to "align the
copper crystals to avoid turbulence in the a-c power flowing through the
cord from the wall outlet".

The problem is that human perception determines satisfaction, and perception
is not always based on objective data.

73, Ron AC7AC

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Doug Person
Sent: Tuesday, July 23, 2013 2:25 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] [K3] Audio circuit distortion

I once wired a guy's $20K audio system with RG8.  He claimed it made all the
difference.  He also claimed that vinyl was vastly superior to CD's.  I told
him he had a wonderful imagination.  The very best and cleanest vinyl with a
radial tracking arm turntable and a top of the line cartridge could just
barely make a 40db s/n.  Digital audio can do 100db anytime.  Many years of
selling audio gear taught me about the psychology of hearing.  It takes an
experienced ear to appreciate a truly flat response. Most people prefer a
very unbalanced equalization.
I got lots of chuckles switching between a $300 system and a $3000 system
and having most people prefer the cheap setup.

Having designed loud speakers professionally (of which 1,000s were sold), I
am equipped with very refined and experienced hearing. Unless you were
listening to FM broadcast, how could you possibly appreciate a .3% THD?  I
always assumed anything less than 1% was more than adequate for our kind of
communications.  If we get down to this level of performance, we'll need to
work on the 50% or so of stations that only concern themselves with output
power - not audio quality.  There is a lot of dreadfully distorted signals
on 20 meter SSB.  Nothing beats working a station that is s9+20 and barely
understandable because he has compression and mic gain pushed up so he sees
1500 watts on his output meter all the time.

So, IMHO, the K3 has absolutely splendid audio when I have a chance to work
another station whose audio is actually adjusted correctly.  It amazes me
that most rigs today have a monitor function.  Must be the most unused
feature of all time.

73, Doug -- K0DXV


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Re: [Elecraft] [K3] Audio circuit distortion

[Harlan]

Wayne
 The radio wouldn't work unless you were grounded...  ;)

Sent from my Verizon Wireless 4G LTE DROID

Wayne Burdick  wrote:

>Brian Hemmis  wrote:
>
>> Now they are even selling high end FUSES for your audio gear !
>> PT Barnum was right ...
>> 
>> Brian K3USC
>
>
>One of my best memories is from when I was about 9 years old and first heard a 
>local radio station using nothing but a germanium diode and a high-Z earphone. 
>I repeat the experiment every so often, just to stay grounded.
>
>Wayne
>N6KR
>
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Re: [Elecraft] [K3] Audio circuit distortion

[George Danner]

One of the Monster Wire/Oxygen Free wire guys!
I've had a few of those as well - Incidentally they will never participate 
in an A/B test!
George
AI4VZ

--
From: "Wayne Burdick" 
Sent: Tuesday, July 23, 2013 5:22 PM
To: "Wes (N7WS)" 
Cc: 
Subject: Re: [Elecraft] [K3] Audio circuit distortion

"Wes (N7WS)" wrote:

> Are you one of those guys who can hear the difference in speaker wire?

Don't I wish.


> I had a guy working for me who was a musician and audiophile who claimed 
> he could tell the difference.  I referred him to Bob Pease.

If you find another one, refer him to us. We'll give him the work bench that 
includes a crystal ball and divining rod.

Wayne
N6KR





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Re: [Elecraft] [K3] Audio circuit distortion

[Wayne Burdick]

Brian Hemmis  wrote:

> Now they are even selling high end FUSES for your audio gear !
> PT Barnum was right ...
> 
> Brian K3USC


One of my best memories is from when I was about 9 years old and first heard a 
local radio station using nothing but a germanium diode and a high-Z earphone. 
I repeat the experiment every so often, just to stay grounded.

Wayne
N6KR

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Re: [Elecraft] KPA500 efficiency

[Yngvi (TF3Y)]

Thanks for the info Lyle. Interesting!

I must study the KPA500 design.
I find it a bit embarrassing having assembled the KPA500 without having
more fundamental insight into its design.

73, Yngvi TF3Y


On Tue, Jul 23, 2013 at 9:26 PM, Lyle Johnson  wrote:

> The KPA500 has no knowledge of mode. It is a "linear" amplifier, only and
> always.
>
> 73,
>
> Lyle KK7P
>
>
>  However, I got no comment on the operating class of the amplifier on CW or
>> whether it depends on what mode you are operating the K3. Anyone?
>>
>
>
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Re: [Elecraft] [K3] Audio circuit distortion

[Brian Hemmis]

Now they are even selling high end FUSES for your audio gear !
PT Barnum was right ...

Brian K3USC



On Jul 23, 2013, at 5:47 PM, Ron D'Eau Claire  wrote:

> And there are those who spend hundreds of dollars on a-c power cords for
> their audio systems that have been cryogenically treated to "align the
> copper crystals to avoid turbulence in the a-c power flowing through the
> cord from the wall outlet". 
> 
> The problem is that human perception determines satisfaction, and perception
> is not always based on objective data. 
> 
> 73, Ron AC7AC
> 
> -Original Message-
> From: elecraft-boun...@mailman.qth.net
> [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Doug Person
> Sent: Tuesday, July 23, 2013 2:25 PM
> To: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] [K3] Audio circuit distortion
> 
> I once wired a guy's $20K audio system with RG8.  He claimed it made all the
> difference.  He also claimed that vinyl was vastly superior to CD's.  I told
> him he had a wonderful imagination.  The very best and cleanest vinyl with a
> radial tracking arm turntable and a top of the line cartridge could just
> barely make a 40db s/n.  Digital audio can do 100db anytime.  Many years of
> selling audio gear taught me about the psychology of hearing.  It takes an
> experienced ear to appreciate a truly flat response. Most people prefer a
> very unbalanced equalization.  
> I got lots of chuckles switching between a $300 system and a $3000 system
> and having most people prefer the cheap setup.
> 
> Having designed loud speakers professionally (of which 1,000s were sold), I
> am equipped with very refined and experienced hearing. Unless you were
> listening to FM broadcast, how could you possibly appreciate a .3% THD?  I
> always assumed anything less than 1% was more than adequate for our kind of
> communications.  If we get down to this level of performance, we'll need to
> work on the 50% or so of stations that only concern themselves with output
> power - not audio quality.  There is a lot of dreadfully distorted signals
> on 20 meter SSB.  Nothing beats working a station that is s9+20 and barely
> understandable because he has compression and mic gain pushed up so he sees
> 1500 watts on his output meter all the time.
> 
> So, IMHO, the K3 has absolutely splendid audio when I have a chance to work
> another station whose audio is actually adjusted correctly.  It amazes me
> that most rigs today have a monitor function.  Must be the most unused
> feature of all time.
> 
> 73, Doug -- K0DXV
> 
> 
> __
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Re: [Elecraft] [K3] Audio circuit distortion

[Ron D'Eau Claire]

And there are those who spend hundreds of dollars on a-c power cords for
their audio systems that have been cryogenically treated to "align the
copper crystals to avoid turbulence in the a-c power flowing through the
cord from the wall outlet". 

The problem is that human perception determines satisfaction, and perception
is not always based on objective data. 

73, Ron AC7AC

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Doug Person
Sent: Tuesday, July 23, 2013 2:25 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] [K3] Audio circuit distortion

I once wired a guy's $20K audio system with RG8.  He claimed it made all the
difference.  He also claimed that vinyl was vastly superior to CD's.  I told
him he had a wonderful imagination.  The very best and cleanest vinyl with a
radial tracking arm turntable and a top of the line cartridge could just
barely make a 40db s/n.  Digital audio can do 100db anytime.  Many years of
selling audio gear taught me about the psychology of hearing.  It takes an
experienced ear to appreciate a truly flat response. Most people prefer a
very unbalanced equalization.  
I got lots of chuckles switching between a $300 system and a $3000 system
and having most people prefer the cheap setup.

Having designed loud speakers professionally (of which 1,000s were sold), I
am equipped with very refined and experienced hearing. Unless you were
listening to FM broadcast, how could you possibly appreciate a .3% THD?  I
always assumed anything less than 1% was more than adequate for our kind of
communications.  If we get down to this level of performance, we'll need to
work on the 50% or so of stations that only concern themselves with output
power - not audio quality.  There is a lot of dreadfully distorted signals
on 20 meter SSB.  Nothing beats working a station that is s9+20 and barely
understandable because he has compression and mic gain pushed up so he sees
1500 watts on his output meter all the time.

So, IMHO, the K3 has absolutely splendid audio when I have a chance to work
another station whose audio is actually adjusted correctly.  It amazes me
that most rigs today have a monitor function.  Must be the most unused
feature of all time.

73, Doug -- K0DXV


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Re: [Elecraft] [K3] Audio circuit distortion

[wb4jfi]

I use oxygen-depleted speaker wire for all my wire antennas.  It's the 
reason why I can work stations that others can't even hear.  Occasionally, 
those stations are even using RF, but most of the time I can directly hear 
the key clicks from their key disturbing the overly-oxygenated air at the 
key gap.  I DO have problems when a ham is using an electronic keyer, and 
must rely on receiving the actual RF signal in those cases.


What, you call me an air-head?  My brain has been oxygen-depleted for years, 
and I LIKE IT!

73, Terry, WB4JFI

-Original Message- 
From: Wes (N7WS)

Sent: Tuesday, July 23, 2013 4:52 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] [K3] Audio circuit distortion

Are you one of those guys who can hear the difference in speaker wire?

I had a guy working for me who was a musician and audiophile who claimed he
could tell the difference.  I referred him to Bob Pease.


On 7/23/2013 1:22 PM, Wayne Burdick wrote:

  Don Putnick  wrote:

I watched the presentation again. Yes, Rob said the K3 was fixed in 2008. 
He also said the fix wasn't as good as he'd like. It didn't compete with 
the <0.3% distortion of the Icom 756 Pro III. So if you look at the 
distortion products at 44:20, would the average amateur (like me) be able 
to hear that?

Short answer: No.

I have excellent hearing (I'm an acoustic guitarist and pianist in my 
"spare time"), and after we made all the updates to the K3, I burned quite 
a bit of lab time trying to hear what Rob was talking about.  I tried 
*really* hard, as did my staff. We couldn't hear it. Rob is superhuman :)


True, it would be possible to reclaim a bit of extra AF headroom by using 
an AF amp that's heavily biased (class A). But 99% of operators would not 
benefit, the radio would draw an extra 200-300 mA with no signal in 
receive mode, and the chip(s) would need fairly extensive heat sinking. 
Doesn't seem like a good tradeoff.


(Disclaimer: I'm biased towards energy efficiency and portability.)

Wayne
N6KR



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Re: [Elecraft] Optimum Monitor for the P3 SVGA?

[Hank Garretson]

On Tue, Jul 23, 2013 at 2:28 PM, Dave Hachadorian wrote:

The higher they are, the more time history you can see.
>

Is that the case? I thought I asked question about more history with SVGA
awhile back, and I though the answer was that history duration was
established by P3.

Did I misinterpret? In particular, right now the way my P3 is setup I get
about ten seconds of waterfall history. If I keep those P3 settings, can I
see more than ten seconds of waterfall on the SVGA? If yes, how much more?

73,

Hank, W6SX

Mammoth Lakes, California

Elevation 8083 feet in John Muir's Range of Light
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Re: [Elecraft] Optimum Monitor for the P3 SVGA?

[Mike K2MK]

Hi Alden,

It's a good question. I would suppose that it's advisable to get a monitor
with a native resolution that matches the selections indicated in the SVGA
manual. I'm not sure what happens when the two disagree. I would like to
hear from folks that have gone through this exercise. Per the current manual
the only resolutions available are:
1024x768, 1280x1040, 1440x900, and 1920x1080.

Elecraft also states in the manual that 1440x900 or less is best for Fixed
Tune Mode. I prefer fixed tune mode and I have to say that the screen goes
through a lot of gyrations when coming out of transmit or when I hit spots
from within WriteLog. If I'm doing a lot of spot jumping I'll switch to
Tracking Mode.

A common feature of monitors is multiple inputs. If your PC has multiple
monitor outputs then you would be able to use the new monitor as a secondary
PC monitor as well as a P3 monitor. If you go this way you'll want a monitor
that has front panel button for input selection as opposed to input
selection through a menu.

Enjoy your SVGA board. It really enhances the K3/P3 experience.

73,
Mike K2MK


atoyer wrote
> I have recently received the P3SVGA and need to procure a suitable
> monitor. Are there any preferences of one size and/or resolution over
> another?
> 
> Alden Oyer, AG5S





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View this message in context: 
http://elecraft.365791.n2.nabble.com/Optimum-Monitor-for-the-P3-SVGA-tp7577047p7577059.html
Sent from the Elecraft mailing list archive at Nabble.com.
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Re: [Elecraft] Optimum Monitor for the P3 SVGA?

[Dave Hachadorian]

Resolution 1920 x 1080, the bigger the better.  I have two 
K3/P3's with two 23" monitors.  The wider they are, the more 
bandwidth you can monitor without scrunching all the signals 
together.  The higher they are, the more time history you can 
see.


You can get a 23" 1920 x 1080 monitor for about $120 any time on 
Amazon.  If you hunt for sales, you can do even better.  Mine are 
Dell refurbs that I got for $75 on sale (not currently 
available).


Dave Hachadorian, K6LL
Big Bear Lake, CA



-Original Message- 
From: ato...@cybermesa.com

Sent: Tuesday, July 23, 2013 1:10 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Optimum Monitor for the P3 SVGA?

I have recently received the P3SVGA and need to procure a 
suitable
monitor. Are there any preferences of one size and/or resolution 
over

another?

Alden Oyer, AG5S

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Re: [Elecraft] KPA500 efficiency

[Lyle Johnson]

The KPA500 has no knowledge of mode. It is a "linear" amplifier, only 
and always.


73,

Lyle KK7P


However, I got no comment on the operating class of the amplifier on CW or
whether it depends on what mode you are operating the K3. Anyone?


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Re: [Elecraft] [K3] Audio circuit distortion

[Doug Person]

I once wired a guy's $20K audio system with RG8.  He claimed it made all 
the difference.  He also claimed that vinyl was vastly superior to 
CD's.  I told him he had a wonderful imagination.  The very best and 
cleanest vinyl with a radial tracking arm turntable and a top of the 
line cartridge could just barely make a 40db s/n.  Digital audio can do 
100db anytime.  Many years of selling audio gear taught me about the 
psychology of hearing.  It takes an experienced ear to appreciate a 
truly flat response. Most people prefer a very unbalanced equalization.  
I got lots of chuckles switching between a $300 system and a $3000 
system and having most people prefer the cheap setup.


Having designed loud speakers professionally (of which 1,000s were 
sold), I am equipped with very refined and experienced hearing. Unless 
you were listening to FM broadcast, how could you possibly appreciate a 
.3% THD?  I always assumed anything less than 1% was more than adequate 
for our kind of communications.  If we get down to this level of 
performance, we'll need to work on the 50% or so of stations that only 
concern themselves with output power - not audio quality.  There is a 
lot of dreadfully distorted signals on 20 meter SSB.  Nothing beats 
working a station that is s9+20 and barely understandable because he has 
compression and mic gain pushed up so he sees 1500 watts on his output 
meter all the time.


So, IMHO, the K3 has absolutely splendid audio when I have a chance to 
work another station whose audio is actually adjusted correctly.  It 
amazes me that most rigs today have a monitor function.  Must be the 
most unused feature of all time.


73, Doug -- K0DXV

On 7/23/2013 2:52 PM, Wes (N7WS) wrote:

Are you one of those guys who can hear the difference in speaker wire?

I had a guy working for me who was a musician and audiophile who 
claimed he could tell the difference.  I referred him to Bob Pease.



On 7/23/2013 1:22 PM, Wayne Burdick wrote:

  Don Putnick  wrote:

I watched the presentation again. Yes, Rob said the K3 was fixed in 
2008. He also said the fix wasn't as good as he'd like. It didn't 
compete with the <0.3% distortion of the Icom 756 Pro III. So if you 
look at the distortion products at 44:20, would the average amateur 
(like me) be able to hear that?

Short answer: No.

I have excellent hearing (I'm an acoustic guitarist and pianist in my 
"spare time"), and after we made all the updates to the K3, I burned 
quite a bit of lab time trying to hear what Rob was talking about.  I 
tried *really* hard, as did my staff. We couldn't hear it. Rob is 
superhuman :)


True, it would be possible to reclaim a bit of extra AF headroom by 
using an AF amp that's heavily biased (class A). But 99% of operators 
would not benefit, the radio would draw an extra 200-300 mA with no 
signal in receive mode, and the chip(s) would need fairly extensive 
heat sinking. Doesn't seem like a good tradeoff.


(Disclaimer: I'm biased towards energy efficiency and portability.)

Wayne
N6KR



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Re: [Elecraft] [K3] Audio circuit distortion

[Wayne Burdick]

"Wes (N7WS)" wrote:

> Are you one of those guys who can hear the difference in speaker wire?

Don't I wish.


> I had a guy working for me who was a musician and audiophile who claimed he 
> could tell the difference.  I referred him to Bob Pease.

If you find another one, refer him to us. We'll give him the work bench that 
includes a crystal ball and divining rod.

Wayne
N6KR





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Re: [Elecraft] KPA500 efficiency

[Yngvi (TF3Y)]

Hi Ignacy.

Many thanks for the response.

The reason for my query was that I was puzzled by my calculated efficiency
numbers - I felt they were high. This also led me to wonder about the
operating class of the amplifier, i.e. whether it was operating in linear
mode on CW or not.

I have confirmed the accuracy of the LP-100A which conforms broadly with
the built in meter of the KPA500.
The LP-100A was factory built so I'd get a NIST calibrated unit. It's an
impressive instrument.

I have not confirmed the accuracy of the KPA500 voltage and current
measurements. I don't think there is anything to adjust in order to
calibrate these.

I did get a response from Wayne N6KR on another email list, where I posted
my message as well. I'm sure he doesn't mind me quoting him: "As with all
broadband power amplifiers, the efficiency of the KPA500 varies somewhat
from band to band due to variations in matching circuit efficiency and
transformer
performance. That's why "typical" efficiency is specified."
However, I got no comment on the operating class of the amplifier on CW or
whether it depends on what mode you are operating the K3. Anyone?

73, Yngvi TF3Y
http://www.tf3y.net


On Tue, Jul 23, 2013 at 6:45 PM, Ignacy  wrote:

> 78% efficiency seems high. But your calculations assume that all the meters
> are accurate.
>
> KPA500 is rated at 500W in linear mode and is supposed to have an
> efficiency
> around 50% at this level. At a higher drive the amp will be less linear but
> at a higher efficiency.  At low power the efficiency increases  linearly
> with output power. If about 50% with 500W then about 62% with 620W.
>
> A data sheet for Microsemi 1 KW module shows efficiency curves in Fig 19 at
> www.freescale.com/files/rf_if/doc/data_sheet/MRFE6VP61K25H.pdf. About 65%
>
> efficiency at 700W with IMD3<-40db.  Reaching 80% at 1.4 KW and IMD3>-28db.
> The dissipation is about 370W at 700W level and 350 at the 1.4 KW level.
> These numbers do not include losses in transformers and filters.
>
> Ignacy, NO9E
>
>
>
>
>
> --
> View this message in context:
> http://elecraft.365791.n2.nabble.com/KPA500-efficiency-tp7577015p7577042.html
> Sent from the Elecraft mailing list archive at Nabble.com.
> __
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Re: [Elecraft] KAT500 Assembly Question

[Dick Dievendorff]

Generally flat head screws are used on the externally visible surfaces (top
and sides), and pan head screws are used otherwise.

I'd use a pan head here.

I'll ask the manual author to update the manual.

Happy building!

73 de Dick, K6KR


-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ian Kahn - Ham
Sent: Tuesday, July 23, 2013 13:41 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] KAT500 Assembly Question

I'm assembling KAT500 s/n 860 and have reached the step where I attach the
L-bracket at LB1 on the circuit board.  The instructions don't specify
whether the 3/16" 4-40 screw used is flat head or pan head.  Can anyone who
has assembled the KAT500 offer guidance?  I'm waiting on Elecraft support
for an answer, but am impatient to get this finished and installed with the
rest of my K-Line today/tonight.

 

Thanks for any and all assistance.

 

73 es gud DX de

 

-- Ian

Ian Kahn, KM4IK

Roswell, GA  EM74ua

  km4ik@gmail.com

K3 #281, P3 #688, KPA500 #1468

HRD v5.x/6.0 Test Team

 

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Re: [Elecraft] [K3] Audio circuit distortion

[Wes (N7WS)]

Are you one of those guys who can hear the difference in speaker wire?

I had a guy working for me who was a musician and audiophile who claimed he 
could tell the difference.  I referred him to Bob Pease.



On 7/23/2013 1:22 PM, Wayne Burdick wrote:

  Don Putnick  wrote:


I watched the presentation again. Yes, Rob said the K3 was fixed in 2008. He also 
said the fix wasn't as good as he'd like. It didn't compete with the <0.3% 
distortion of the Icom 756 Pro III. So if you look at the distortion products at 
44:20, would the average amateur (like me) be able to hear that?

Short answer: No.

I have excellent hearing (I'm an acoustic guitarist and pianist in my "spare 
time"), and after we made all the updates to the K3, I burned quite a bit of lab 
time trying to hear what Rob was talking about.  I tried *really* hard, as did my staff. 
We couldn't hear it. Rob is superhuman :)

True, it would be possible to reclaim a bit of extra AF headroom by using an AF 
amp that's heavily biased (class A). But 99% of operators would not benefit, 
the radio would draw an extra 200-300 mA with no signal in receive mode, and 
the chip(s) would need fairly extensive heat sinking. Doesn't seem like a good 
tradeoff.

(Disclaimer: I'm biased towards energy efficiency and portability.)

Wayne
N6KR



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[Elecraft] K3 Audio Distortion

[Phil Brown]

Just like to add my 2 cents worth.
I like to listen to am radio with my K3 (6971) and it is fitted with the 13Khz 
xtal filter in that position, the audio to me is quite superb and I have 
several other rigs and short wave receivers to compare it to.
I have never made any comments on the reflector before so I thought I would 
just add, while I'm here that the K3 is the best transceiver I have ever owned 
and I have had quite a few.
Recently took part in a ZL memorial contest and used a friends K3 with a P3 
panadapter, it made all the difference, just superb.
Phil, ZL1PB.


Sent from my iPad
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[Elecraft] KAT500 Assembly Question

[Ian Kahn - Ham]

I'm assembling KAT500 s/n 860 and have reached the step where I attach the
L-bracket at LB1 on the circuit board.  The instructions don't specify
whether the 3/16" 4-40 screw used is flat head or pan head.  Can anyone who
has assembled the KAT500 offer guidance?  I'm waiting on Elecraft support
for an answer, but am impatient to get this finished and installed with the
rest of my K-Line today/tonight.

 

Thanks for any and all assistance.

 

73 es gud DX de

 

-- Ian

Ian Kahn, KM4IK

Roswell, GA  EM74ua

  km4ik@gmail.com

K3 #281, P3 #688, KPA500 #1468

HRD v5.x/6.0 Test Team

 

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Re: [Elecraft] Optimum Monitor for the P3 SVGA?

[Ron D'Eau Claire]

I just grabbed an Acer 20 inch that was on sale for under $100 at a local
store. 

20-inch (diagonal) Widescreen LED
Dynamic contrast : Dynamic: 12,000,000:1 Native: 1,000:1
Viewing Angles (CR = 10) : Horizonal: 170° Vertical: 160°
Ports: VGA & DVI with HDCP
5ms response time

http://tinyurl.com/kl82klk (compressed URL to Amazon.com offering)

I prefer LED types having had enough fluorescent backlights die on me over
the years, Hi! 

Works FB for me. Of course, the size depends on how much space you have, how
far away from you it is placed, etc. Mine is about 2 feet from me. 

73, Ron AC7AC


-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of ato...@cybermesa.com
Sent: Tuesday, July 23, 2013 1:11 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Optimum Monitor for the P3 SVGA?

I have recently received the P3SVGA and need to procure a suitable monitor.
Are there any preferences of one size and/or resolution over another?

Alden Oyer, AG5S


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Re: [Elecraft] [K3] Audio circuit distortion

[Wayne Burdick]

 Don Putnick  wrote:

> I watched the presentation again. Yes, Rob said the K3 was fixed in 2008. He 
> also said the fix wasn't as good as he'd like. It didn't compete with the 
> <0.3% distortion of the Icom 756 Pro III. So if you look at the distortion 
> products at 44:20, would the average amateur (like me) be able to hear that?

Short answer: No. 

I have excellent hearing (I'm an acoustic guitarist and pianist in my "spare 
time"), and after we made all the updates to the K3, I burned quite a bit of 
lab time trying to hear what Rob was talking about.  I tried *really* hard, as 
did my staff. We couldn't hear it. Rob is superhuman :)

True, it would be possible to reclaim a bit of extra AF headroom by using an AF 
amp that's heavily biased (class A). But 99% of operators would not benefit, 
the radio would draw an extra 200-300 mA with no signal in receive mode, and 
the chip(s) would need fairly extensive heat sinking. Doesn't seem like a good 
tradeoff. 

(Disclaimer: I'm biased towards energy efficiency and portability.)

Wayne
N6KR


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Re: [Elecraft] KPA500 #1584 alive an running

[Richard Ferch]

DL1OLI wrote:


the K3 shows messages from the KPA500 if I press OPER/STBY but shouldn't the K3 
\
decrease the power to 40W in OPER ? And in standby increase to 100W?

Fw K3: 4.60 FE KPA:1.23

What can be the fault?


Oli, IIRC you need to set the K3's CONFIG:PWR SET menu item to PER BAND 
to make this work. In PER BAND mode, the K3 will remember two different 
power settings on each band; one when the KPA500 is off or in STANDBY, 
and a different one for when the KPA500 is in OPERATE.


73,
Rich VE3KI
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[Elecraft] Optimum Monitor for the P3 SVGA?

[atoyer]

I have recently received the P3SVGA and need to procure a suitable
monitor. Are there any preferences of one size and/or resolution over
another?

Alden Oyer, AG5S

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Re: [Elecraft] [K3] Audio circuit distortion

[Scott Manthe]

Given that a decent stereo has a total harmonic distortion of something 
less than .05 percent, you might be able to "hear" those distortion 
products, but what would that mean? Most amateur communication is done 
surrounded by noise or immersed in noise, with imperfect signals, 
adjusted imperfectly. So, does that 3/10ths of a percent distortion 
product really mean anything on the air? I don't know, but I'm guessing 
it doesn't mean much, but I'm not an audiophile, so I might be dead wrong.


73,
Scott, N9AA


On 7/23/13 3:15 PM, Don Putnick wrote:

I watched the presentation again. Yes, Rob said the K3 was fixed in 2008. He also 
said the fix wasn't as good as he'd like. It didn't compete with the <0.3% 
distortion of the Icom 756 Pro III. So if you look at the distortion products at 
44:20, would the average amateur (like me) be able to hear that?



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Re: [Elecraft] LP-100 Wattmeter Won't Boot up

[Jessie Oberreuter]

 I had the same experience last winter.  What I found, however, was 
that the LP-100 was "working" in that I could still use it over the serial 
port, but the front panel display appeared to be dead.  I'm guessing the 
display died, but I have one of the early models with the now unobtanium 
displays, so I figured I'd need to contact Larry.  I'm not on the yahoo 
group, so let me know what you find out!



On Tue, 23 Jul 2013, Brian F. Wruble wrote:


Hi guys:

I have had an LP-100 wattmeter for a long time, and it was in my spare
parts bin, for whatever reason.  I brought it back out to put it back into
service with my new K3, and it won't light up.  The power light comes on,
but the screen stays black.

I believe I bought this assembled, at least I don't recall building it as a
kit. It has been some years now.

Does anyone have troubleshooting suggestions?

Tnx de Brian W3BW


*Brian F. Wruble, C.F.A.

*70 is the new 40.*
*
Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077
Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD 21930
eFax  305.768.0278
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[Elecraft] [K3] Audio circuit distortion

[Don Putnick]

I watched the presentation again. Yes, Rob said the K3 was fixed in 2008. He 
also said the fix wasn't as good as he'd like. It didn't compete with the <0.3% 
distortion of the Icom 756 Pro III. So if you look at the distortion products 
at 44:20, would the average amateur (like me) be able to hear that?
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[Elecraft] KPA500 Power On Sequence

[Larry Russell]

Is there a routine to be followed to power up the KPA500?  I recently added
the KPA500 to 

my K3 to complete my K-Line. Sometimes when I punch the power on button of
the KPA500

nothing happens till I cycle the switch on the back of the AMP off and back
on and then the

front power on switch will work.   I've not seen anything on this in the
Digest..

If I power the Amp on first before the K3 it seems to work 8 out of 10 times
but not 100%

of the time.   

 

Is there a sequence I need to follow?

 

Larry -  K5ZCJ

k5...@cox.net

K3 # 6592

P3 # 2166

KAT500 # 0655

KPA500 # 1488

 

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Re: [Elecraft] KPA500 efficiency

[Ignacy]

78% efficiency seems high. But your calculations assume that all the meters
are accurate.

KPA500 is rated at 500W in linear mode and is supposed to have an efficiency
around 50% at this level. At a higher drive the amp will be less linear but
at a higher efficiency.  At low power the efficiency increases  linearly
with output power. If about 50% with 500W then about 62% with 620W.   

A data sheet for Microsemi 1 KW module shows efficiency curves in Fig 19 at
www.freescale.com/files/rf_if/doc/data_sheet/MRFE6VP61K25H.pdf‎. About 65%
efficiency at 700W with IMD3<-40db.  Reaching 80% at 1.4 KW and IMD3>-28db.
The dissipation is about 370W at 700W level and 350 at the 1.4 KW level.
These numbers do not include losses in transformers and filters. 

Ignacy, NO9E

 



--
View this message in context: 
http://elecraft.365791.n2.nabble.com/KPA500-efficiency-tp7577015p7577042.html
Sent from the Elecraft mailing list archive at Nabble.com.
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[Elecraft] Elecraft Key

[Tomy]

I have a nice black base Elecraft Paddle key for sale. Used it very little
Make an offer! 


73! Tomy Ivan KF7GC
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Re: [Elecraft] KpA 100 amp and tuner

[Ariel Jacala]

They started taking orders for the KXPA100 and will start shipping sometime in 
August.  From the context it appears you are referring to the amp for the KX3.

Ariel NY4G

Sent from my iPhone

On Jul 23, 2013, at 11:57 AM, "George Howe Jr"  wrote:

> Does anyone know if the amp with tuner is ready for sale and in stock?
> 
> Jeff Drew, N4JDU
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[Elecraft] Inv-L joy

[Tom Boucher]

Sorry! Wrong reflector - was meant for the 160 one
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[Elecraft] Inv-L joy

[Tom Boucher]

What bothers me about putting the actual antenna wire across the tree is that 
it is then very close and in fact touching the tree. I'm not sure what loss the 
tree would cause by having it so close.

My inverted-L is held 85 ft up in an ash tree by nylon rope. I have a rope and 
insulator near the bottom which stands it off from the tree in the direction of 
the top section. I guess mine is 5 or 6 ft away at the top and further at the 
bottom.

Nylon rope is pretty good from an abrasion viewpoint but it will still abrade. 
My L came down recently after well over a year of backwards and forward over 
the branches, so now my annual maintenance will include lowering the antenna, 
shortening the halyard at the top end to allow a fresh section of rope across 
the branches.

Polyester rope is not nearly as abrasion resistant as nylon but looks very 
similar, so be careful what you are using!

73
Tom G3OLB
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Re: [Elecraft] KpA 100 amp and tuner

[Don Wilhelm]

Jeff (and all),

If you are asking about the KPA100 and KAT100 (for the K2), then the 
answer is yes, it has been shipping from stock for a long time.
The KPA3 and KAT3 100 watt amp and tuner for the K3 has been shipping 
for a good long time now too.
OTOH if you meant the KXPA100 and the KXAT100 (for the KX3 and other 
transceivers) - not yet, but soon.


The point here is that due to the close resemblance in product 
designations, it is helpful if you can refer to the product with the 
proper designations - it helps avoid confusion about which you are 
referring to.
Nothing personal intended Jeff, but your question made a very good 
example - these sources of confusion occur often on the reflector.


73,
Don W3FPR

On 7/22/2013 6:13 PM, George Howe Jr wrote:

Does anyone know if the amp with tuner is ready for sale and in stock?




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Re: [Elecraft] KpA 100 amp and tuner

[George Danner]

from:   
http://www.elecraft.com/elecraft_shipping_status.htm 

In engineering development and test. 
Estimated shipping date Q2. 

73
George
AI4VZ

-Original Message- 
From: George Howe Jr 

Does anyone know if the amp with tuner is ready for sale and in stock?

Jeff Drew, N4JDU
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Re: [Elecraft] [K3] Audio circuit distortion

[Scott Manthe]

On 7/23/13 11:39 AM, Don Putnick wrote:

How much of the audio quality described in the recent threads can be attributed 
to the audio circuit distortion, as reported by Rob Sherwood at this year's 
Dayton Contest Academy? The K3 audio section starts around 41:40 into the video.

http://www.youtube.com/watch?v=SOf2OOGeGi8&feature=c4-overview-vl&list=PLRSwUN4qr1Loc58Ip6IB7d43IXkjMat8H

Don NA6Z
K3, KPA500, KAT500

Since that issue was addressed in 2008, I'm not sure they're related. 
Here is one of Wayne's comments from that thread:

Rob helped us identify the K3's audio output distortion issue, which we 
subsequently cleaned up with a hardware change (five years ago) and new 
firmware (about three years ago).

If you have an older K3, see:

http://www.elecraft.com/K3/mods/K3_AF_Stage_Upgrade_Instructions_Rev_B.pdf

This mod, long since incorporated into production, adds a large RF choke in 
series with the AF amplifier stage's DC supply. As Rob's plots show, this 
dramatically knocked down the IMD products; most are now down 70-80 dB. I have 
pretty good ears, and once we made this change, I couldn't hear any difference 
between the internal amplifier and external powered speakers.

Rob is correct that it would be possible to further reduce low-level distortion 
products. However, many of these fall outside the hearing range of the average 
user because they're related to an image of the 12-kHz CODEC sampling rate. 
What's left within hearing range could be reduced with a change in the AF amp 
IC, though there are diminishing returns and pragmatic considerations. The 
stereo audio amplifier IC we use is capable of driving two 4-ohm speakers at up 
to a few watts apiece, and it generates no RFI because it is a classic analog 
device running class AB. We could get higher drive power using a beefier analog 
device with much higher quiescent current, or by using a class-D or higher 
switching-style device. The former would increase the radio's current drain 
substantially, while the latter would require additional shielding and 
decoupling.

As always, our goal is to continuously improve the K3 in a way that is 
applicable to units in the field. If we find a practical way to achieve a 
further significant improvement in the audio channel, we'll certainly make it 
available.

73,
Wayne
N6KR


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Re: [Elecraft] K3 Erratic SSB Power Output

[G8DX]

Thanks to everybody that took the time to reply to my post.

Yesterday I took my rig to a different shack with a different ground, PSU, 
load, meter and feeder to eliminate any problems at my station, but sadly the 
problem is still there. The Array Solutions Power Master on the fast setting 
really demonstrated the problem clearly - here's a quick video of the issue (no 
mic connected - just two tone activated). The rig was set to about 50w and the 
power control wasn't touched during the video. Excuse the conversation in the 
background - but you get the idea! 

http://youtu.be/Gl2k7gfelV4

Today I had the cases off and checked all the various pins and sockets were 
properly mated, I also had both the LPA and KPA out to double check them. I 
also had D1 on the LPA reworked but no change. Physically everything looks FB.

So far a bit disappointing and right on top of the IOTA Test. Currently in 
discussion with Elecraft about a resolution.

--
73 de G8DX/M




On 22 Jul 2013, at 17:32, "Terry Schieler"  wrote:

> Jack,
> I just sent my K3 (474) off to Elecraft service after wrestling with that 
> same problem.  My TX output was suddenly all over the place.  The K3 power 
> out bar graph showed 25% lower power than I had dialed up, but good, 
> calibrated external watt meters were showing 40-50% higher power than what I 
> had set on the K3.
> 
> After reading your post I wonder if a new version of Firm Ware might have 
> caused something to go wack-o.
> 
> Terry W0FM
> 
> 
> -Original Message-
> From: JACK WHITE [mailto:g...@btinternet.com] 
> Sent: Sunday, July 21, 2013 2:12 PM
> To: elecraft@mailman.qth.net
> Subject: [Elecraft] K3 Erratic SSB Power Output
> 
> Hello K3 Reflector.
> 
> 
> I have an issue with my new K3/100 #7482. On SSB the peak power output isn't 
> stable. The SSB power output fluctuates about +/- 15% of where it is set, but 
> occasionally spikes to much more. The issue is on all bands but seems worse 
> on 12/10m. I have tested the rig connected straight to a 1kW Bird 50ohm load 
> and have tried 2 different linear power supplies. The problem is present 
> using the two tone test feature, microphone or direct PC audio fed into the 
> rig. 
> 
> 
> The real problem is: I set up my Acom 1000 at the legal limit here (400w) and 
> the power output is all over the place, sometimes 150w, then maybe 500w, then 
> 300w, then all of a sudden the power can spike to 1kW+. I operate mostly CW. 
> Things seem more stable on CW, but compared to my previous Jap rigs 
> (FT1000MP, FT990, TS850) etc, the power output is very difficult to properly 
> regulate. On my previous rigs, I'd set them up to drive the Acom to a certain 
> power level and they'd run for hours rock solid without a peep.
> 
> 
> I've had an e-mail exchange with a friendly Elecraft Guy which resulted in me 
> redoing the TX Gain calibration, he said the numbers looked good, but the 
> problem persists. I am curious to see if anybody else has this issue and 
> knows of a fix? As it is, the rig isn't much use to me.
> 
> 
> 
> Cheers
> 
> 
> 
> Jack G8DX  
> 
> 
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Re: [Elecraft] Fw: HIgh swr on 6m

[WILLIS COOKE]

Stewart, do you have an amplifier attached?  I have found that having my 
Clipperton L in the circuit causes high SWR on 6 meters, but if I connect 
direct to the antenna switch the SWR on my SteppIR is low as it should be.  
 
Willis 'Cookie' Cooke 
K5EWJ & Trustee N5BPS, USS Cavalla, USS Stewart



 From: Stewart Rolfe 
To: "elecraft@mailman.qth.net"  
Sent: Tuesday, July 23, 2013 10:09 AM
Subject: [Elecraft] Fw: HIgh swr on 6m
 

Posted this to support but no reply yet, maybe on a well earned summer break?! 
Anyone here help?

Thanks,
Stewart, GW0ETF


- Forwarded Message -
>From: Stewart Rolfe 
>To: "k3supp...@elecraft.com"  
>Sent: Monday, 22 July 2013, 9:10
>Subject: HIgh swr on 6m
> 
>
>
>Hi,
>
>
>Just tried 6m for the first time on #145(!) and getting high swr into a well 
>matched antenna as well as a dummy load plugged directly into either antenna 
>socket; around 2.1/2.6:1 and high enough for tx calibration to fail.
>
>
>All other bands fine so wondering if I should check the low pass filter?
>
>
>73,
>Stewart Rolfe, GW0ETF
>
>
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[Elecraft] KpA 100 amp and tuner

[George Howe Jr]

Does anyone know if the amp with tuner is ready for sale and in stock?

Jeff Drew, N4JDU
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[Elecraft] FS: K2/100 & KAT100-1 & Alpha 9500

[K8MV]

*K2/100 S/N 5475*

Includes the following options
KAF2
KNB2
KIO2
K60XV
K160RX
KDSP2
KSB2
ETS15
Dimple VFO Knob

*KAT100-1*

All manuals and cables included.  Professionally built by Alan, W3DVX
Realigned December 2012
Everything works great, non-smoking, never been mobile.

$1450 including insurance and shipping CONUS.

*Alpha 9500*

1 year old, 3 years left on warranty, Less than 2 hours operating time.

$6250 including insurance and shipping CONUS



--
View this message in context: 
http://elecraft.365791.n2.nabble.com/FS-K2-100-KAT100-1-Alpha-9500-tp7576875.html
Sent from the Elecraft mailing list archive at Nabble.com.
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[Elecraft] KPA500 #1584 alive an running

[Oli, DL1OLI]

Hello List,

I am pleased to announce that the Elecraft KPA 500 #1584 is alive and running 
fine.

This morning i collected the package from the customs office. After I arrived 
at home I checked all the parts.
Nothing was missing so I started the assembley. After about 5 hours the KPA 
emmitted the first Radio signal.

Now it is connected to my K3 with the KPAK3AUX (the 15 pole and the Y-cable) 
cable and the K3 shows messages from the KPA500 if I press OPER/STBY
but shouldn't the K3 decrease the power to 40W in OPER ? And in standby 
increase to 100W?

Fw K3: 4.60 FE KPA:1.23

What can be the fault?

73 Oli
DL1OLI/AJ4UR
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[Elecraft] [K3] Audio circuit distortion

[Don Putnick]

How much of the audio quality described in the recent threads can be attributed 
to the audio circuit distortion, as reported by Rob Sherwood at this year's 
Dayton Contest Academy? The K3 audio section starts around 41:40 into the video.

http://www.youtube.com/watch?v=SOf2OOGeGi8&feature=c4-overview-vl&list=PLRSwUN4qr1Loc58Ip6IB7d43IXkjMat8H

Don NA6Z
K3, KPA500, KAT500
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Re: [Elecraft] LP-100 Wattmeter Won't Boot up

[iain macdonnell - N6ML]

Hi Brian,

Suggest you ask here: http://groups.yahoo.com/group/LP-100/

73,

~iain / N6ML



On Tue, Jul 23, 2013 at 7:35 AM, Brian F. Wruble  wrote:
> Hi guys:
>
> I have had an LP-100 wattmeter for a long time, and it was in my spare
> parts bin, for whatever reason.  I brought it back out to put it back into
> service with my new K3, and it won't light up.  The power light comes on,
> but the screen stays black.
>
> I believe I bought this assembled, at least I don't recall building it as a
> kit. It has been some years now.
>
>  Does anyone have troubleshooting suggestions?
>
> Tnx de Brian W3BW
>
>
> *Brian F. Wruble, C.F.A.
>
> *70 is the new 40.*
> *
> Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077
> Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD 21930
> eFax  305.768.0278
> __
> Elecraft mailing list
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[Elecraft] Fw: HIgh swr on 6m

[Stewart Rolfe]

Posted this to support but no reply yet, maybe on a well earned summer break?! 
Anyone here help?

Thanks,
Stewart, GW0ETF


- Forwarded Message -
>From: Stewart Rolfe 
>To: "k3supp...@elecraft.com"  
>Sent: Monday, 22 July 2013, 9:10
>Subject: HIgh swr on 6m
> 
>
>
>Hi,
>
>
>Just tried 6m for the first time on #145(!) and getting high swr into a well 
>matched antenna as well as a dummy load plugged directly into either antenna 
>socket; around 2.1/2.6:1 and high enough for tx calibration to fail.
>
>
>All other bands fine so wondering if I should check the low pass filter?
>
>
>73,
>Stewart Rolfe, GW0ETF
>
>
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[Elecraft] LP-100 Wattmeter Won't Boot up

[Brian F. Wruble]

Hi guys:

I have had an LP-100 wattmeter for a long time, and it was in my spare
parts bin, for whatever reason.  I brought it back out to put it back into
service with my new K3, and it won't light up.  The power light comes on,
but the screen stays black.

I believe I bought this assembled, at least I don't recall building it as a
kit. It has been some years now.

 Does anyone have troubleshooting suggestions?

Tnx de Brian W3BW


*Brian F. Wruble, C.F.A.

*70 is the new 40.*
*
Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077
Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD 21930
eFax  305.768.0278
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Re: [Elecraft] k3 7536

[Greg]

You can probably get by with a TX Delay setting of 10 without noticing
any issues but 20 is definitely what is causing your problem.

73
Greg
AB7R

On 7/23/13, Igor Sokolov  wrote:
> Hank, this is known problem. Set TX dly to default and see the result.
>
> 73, Igor UA9CDC
> - Original Message -
> From: "Pfizenmayer" 
> To: 
> Sent: Tuesday, July 23, 2013 1:39 PM
> Subject: [Elecraft] k3 7536
>
>
>> Called V73NS  tonite on 20 CW and he could not make out keying - said very
>>
>> choppy - the keying sounds fine in the headphones virtually no matter what
>>
>> I do. But on external rx it does in fact sound very choppy and sometimes
>> misses characters ,
>>
>> Using LOGIKIT CMOS4  external keyer - not the internal keyer.
>>
>> Using
>> VOX
>> QSK SEMI
>> TX dly 020 (tx delay is also affecting CW weight)
>> CW QRQ is OFF
>>
>> P3 is connected on the RS232 buss.
>>
>> I turned off  the logging computer - rebooted the K3 and still sounds
>> lousy
>>
>> If I use PTT with a foot pedal to PTT jack  CW gets even more choppy
>>
>> OK  , what have I got set wrong 
>>
>> Hank K7HP
>> __
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>
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Re: [Elecraft] K3/0 Mini

[Keith Heimbold]

I will be placing a first hour order on website for one. Last I heard was 
August of this year.

Keith
AK6ZZ

Sent from my iPhone please excuse typos

On Jul 23, 2013, at 7:10 AM, "Brian F. Wruble"  wrote:

> Anyone know when this will be available?
> 
> Tnx de Brian W3BW
> 
> 
> *Brian F. Wruble, C.F.A.
> 
> *70 is the new 40.*
> *
> Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077
> Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD 21930
> eFax  305.768.0278
> __
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[Elecraft] K3/0 Mini

[Brian F. Wruble]

Anyone know when this will be available?

Tnx de Brian W3BW


*Brian F. Wruble, C.F.A.

*70 is the new 40.*
*
Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077
Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD 21930
eFax  305.768.0278
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Re: [Elecraft] [KX3} rig control with fldigi

[Nate Bargmann]

* On 2013 22 Jul 21:57 -0500, Mike WA8BXN wrote:
> I have found the solution to my problem. First, when the initialize button
> is pressed an error message appeared on the bottom of the main window, not
> on the configuration window that pops up. It took me a while to see that. I
> am using the hamlib option to control the KX3. It seems the com port number
> cannot be bigger than 9 for it to work. My Elecraft USB cable defaulted to a
> com port greater than 9, so it did not work. Going to device manager for
> that com port, one can change to com port number, in my case I changed it to
> com2 and it works fine now. 

Hi Mike, et. al.

The latest version of Fldigi that is in testing (I'm not exactly sure,
ask Dave, W1HKJ, for which version of Fldigi this change affects)
includes the latest version of Hamlib where the COM9+ limitation should
be removed.

If there are issues with the KX3 Hamlib support, please let me know.

73, de Nate >>

-- 

"The optimist proclaims that we live in the best of all
possible worlds.  The pessimist fears this is true."

Ham radio, Linux, bikes, and more: http://www.n0nb.us
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Re: [Elecraft] k3 7536

[Igor Sokolov]

Hank, this is known problem. Set TX dly to default and see the result.

73, Igor UA9CDC
- Original Message - 
From: "Pfizenmayer" 

To: 
Sent: Tuesday, July 23, 2013 1:39 PM
Subject: [Elecraft] k3 7536


Called V73NS  tonite on 20 CW and he could not make out keying - said very 
choppy - the keying sounds fine in the headphones virtually no matter what 
I do. But on external rx it does in fact sound very choppy and sometimes 
misses characters ,


Using LOGIKIT CMOS4  external keyer - not the internal keyer.

Using
VOX
QSK SEMI
TX dly 020 (tx delay is also affecting CW weight)
CW QRQ is OFF

P3 is connected on the RS232 buss.

I turned off  the logging computer - rebooted the K3 and still sounds 
lousy


If I use PTT with a foot pedal to PTT jack  CW gets even more choppy

OK  , what have I got set wrong 

Hank K7HP
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Re: [Elecraft] k3 7536

[Tim Hague]

Hank, can I suggest that you try the internal keyer, that will at least prove 
if it's the rig or your external keyer. I'd then start to look for RF feedback 
problems.

Best regards, Tim Hague
Skype m0afj.Tim
Sent on my iPad


On 23 Jul 2013, at 08:39, "Pfizenmayer"  wrote:

> Called V73NS  tonite on 20 CW and he could not make out keying - said very 
> choppy - the keying sounds fine in the headphones virtually no matter what I 
> do. But on external rx it does in fact sound very choppy and sometimes misses 
> characters ,
> 
> Using LOGIKIT CMOS4  external keyer - not the internal keyer. 
> 
> Using 
> VOX
> QSK SEMI
> TX dly 020 (tx delay is also affecting CW weight) 
> CW QRQ is OFF 
> 
> P3 is connected on the RS232 buss. 
> 
> I turned off  the logging computer - rebooted the K3 and still sounds lousy
> 
> If I use PTT with a foot pedal to PTT jack  CW gets even more choppy 
> 
> OK  , what have I got set wrong 
> 
> Hank K7HP 
> __
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[Elecraft] k3 7536

[Pfizenmayer]

Called V73NS  tonite on 20 CW and he could not make out keying - said very 
choppy - the keying sounds fine in the headphones virtually no matter what I 
do. But on external rx it does in fact sound very choppy and sometimes misses 
characters ,

Using LOGIKIT CMOS4  external keyer - not the internal keyer. 

Using 
VOX
QSK SEMI
TX dly 020 (tx delay is also affecting CW weight) 
CW QRQ is OFF 

P3 is connected on the RS232 buss. 

I turned off  the logging computer - rebooted the K3 and still sounds lousy

If I use PTT with a foot pedal to PTT jack  CW gets even more choppy 

OK  , what have I got set wrong 

Hank K7HP 
__
Elecraft mailing list
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Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

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Please help support this email list: http://www.qsl.net/donate.html