Re: [Elecraft] OT - Way off topic Acom2000a

[W5RDW]

Go to this group on Yahoo Groups. Array Solutions (distributor for Acom)
shows up quite often to answer questions.

http://groups.yahoo.com/group/acom-list/





-
Roger W5RDW
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Re: [Elecraft] K2 and RTTY - a few questions

[Bill Coleman]

On Feb 12, 2013, at 7:59 AM, Don Wilhelm  wrote:

> As far as having to switch to RTTYrev for 15 meters and above, I thought the 
> K2 automatically compensated for th sideband switch.  It does that for SSB, 
> but I don't know about RTTY, I have never checked.  The K does remember the 
> mode on a per band basis, so once you are set up, it should be transparent 
> for operation.  The mixing scheme changes at 15 meters, not 20.

It does it correctly, as you suggested. I think this fellow may have his BFO 
settings incorrect for RTTY REV.

Bill Coleman, AA4LR, PP-ASELMail: aa...@arrl.net
Web: http://boringhamradiopart.blogspot.com
Quote: "Not within a thousand years will man ever fly!"
   -- Wilbur Wright, 1901

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Re: [Elecraft] K2 and RTTY - a few questions

[Bill Coleman]

On Feb 11, 2013, at 11:54 PM, "Andy, KU7T"  wrote:

> Question 1: My frequency is 1000Hz off compared to what DX cluster spots
> show.  When I see  a spot at 14.077 it, is for at 14.078. This must have to
> do with the fact that the filters centers at 1000Hz, but is there a way to
> compensate somewhere for this? Would be nice to be able to use the band map
> of my contest program to jump to stations I would like to work.

If you use the N!MM contesting software, you can program an offset. Generally, 
the frequency of the spot should be the Mark frequency, so your offset should 
be the value of your mark frequency.

> Question 2: I noticed that 15m and up, I had to put both MTTY and the K2 in
> RTTY reverse.  Is this correct? I happen to remember that the switch to USB
> from LSB happens on 20m. Now I am wondering if this is something special for
> RTTY or not.

I would double-check that you have the sidebands correct on your RTTY mode BFO 
settings. It sounds to me like you have both sides tuned to the same sideband. 
Member RTTY and RTTY REV should correspond to LSB and USB, respectively, much 
like the CW and CW REV modes.

The K2 does an internal inversion on 15m and up, but it picks the opposite 
sideband, so it all comes out the same. However, you've got to have the BFO 
settings right.

I've got a blog posting about how I set up my K2/100 filters here:
http://boringhamradiopart.blogspot.com/2010/02/configuring-elecraft-k2-crystal-filters.html

There's several tips in this posting. Note that I opted for a RTTY center 
frequency of 1500 Hz, which required a slight modification to the BFO 
oscillator to get enough range. It's in the article.

The K2/100 works pretty well on RTTY. My only complaint is that the transmitter 
gain varies wildly from band to band, so you have to carefully adjust the audio 
input level when you change bands.

Bill Coleman, AA4LR, PP-ASELMail: aa...@arrl.net
Web: http://boringhamradiopart.blogspot.com
Quote: "Not within a thousand years will man ever fly!"
   -- Wilbur Wright, 1901

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[Elecraft] K3; soundcard manager for digital modes. Update

[Richard Fjeld]

Update on the Romac soundcard manager.  

For digital voice, it seems I have to do the USB sound settings manually (which 
isn't bad).  The Romac software adjusts the computer soundcard fine, but the 
sliders in the USB screen don't seem to function.

Rich, n0ce

- Original Message - 
From: Richard Fjeld 
To: elecraft...@yahoogroups.com ; elecraft posting 
Sent: Thursday, February 21, 2013 12:18 AM
Subject: Fw: K3; maybe K2, soundcard manager for digital modes.


Here is where I downloaded it from:

http://www.romacsoftware.com/SoundManagement.htm


- Original Message - 
From: Richard Fjeld 
To: elecraft...@yahoogroups.com ; elecraft posting 
Sent: Thursday, February 21, 2013 12:12 AM
Subject: K3; maybe K2, soundcard manager for digital modes.


I don't remember where I read about this, but I have tried it, and at first 
glance it looks good.  Unlike starting your software, and then setting your 
soundcard, you open this program from your toolbar and it starts your software 
for you and sets the soundcard.  When you are done, it sets the soundcard back 
to 'normal Windows' level.

I read it is supposed to work with Windows 7 but I have only tried it with XP.

Read a short description here; 
http://download.cnet.com/RoMac-Sound-Card-Manager/3000-2141_4-75819615.html

Rich, n0ce
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Re: [Elecraft] KAT500 for remote operation

[Ron D'Eau Claire]

Greg, there is really no requirement to ever push the KAT500 TUNE switch.
That is a "convenience". 

Once the KAT500 has been "tuned" to a particular frequency, it will store
the settings and jump its tuning settings back to them when it senses RF at
that frequency from any transmitter. No button pushing or other involvement
is necessary as long as nothing changes in the antenna system.

The "TUNE" switch is used ONLY when first commanding the KAT500 to tune the
antenna system for a particular frequency with a particular antenna. 

Note that many antennas do not provide a low SWR across the entire Ham band,
especially on the lower frequency bands. The KAT500 divides the spectrum up
into segments and can memorize the tuning settings for *every* segment to
ensure optimum SWR across the spectrum. 

If you are setting your KAT500 up for remote operation, you might want to
make sure it has a memorized tuning setting for every frequency segment in
each band.  

 > Below 3 MHz the segments are 10 kHz wide.
 > From 3 MHz through 26 MHz the segments are 20 kHz wide.
 > From 26 MHz to 38 MHz the segments are 100 kHz wide.
 > From 38 MHz to 60 MHz the segments are 200 kHz wide.

That involves transmitting briefly inside Ham bands every 10 kHz below 3
MHz, every 20 kHz between 3 and 26 MHz, etc. 

The KAT500 also stores the antenna you chose (ANT 1, 2 or 3) so it will
automatically return there when it senses RF.

Some Elecraft customer support people like to call this "training" the
KAT500. But you don't even need to do that. 

Instead, you can leave the KAT500 in AUTO mode. In this mode, it will
automatically initiate a TUNE cycle if it senses an SWR above a pre-defined
level. IIRC the default threshold above which the KAT500 in AUTO mode will
launch a tune operation is 1.8:1. That is adjustable in the KAT500 Utility
Program. 

After that, it will have stored those values in memory so it will instantly
switch back to them when you return to that frequency. 

Some operators take the time to "train" the KAT500 so it will switch back to
the settings for a frequency instantly rather than have it possibly go
through a TUNE  cycle that might take several seconds. 

Bottom line: if you don't mind a few second wait while the KAT500 determines
the optimum settings for a frequency when you visit it the first time, all
you need do is make sure you have it in AUTO mode and, if you are using more
than one antenna, that you have done a test transmission somewhere in each
band so the KAT500 has memorized which antenna to select for each band. 

Of course if you are using an amplifier, the KAT500 protects it by opening
the key line while it's tuning so the amp isn't stressed and the KAT500 sees
only the exciter power. 


73, Ron AC7AC



 

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Greg Felter
Sent: Thursday, February 21, 2013 6:20 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] KAT500 for remote operation

Hello group

I have a question about the KAT500.  Initially I will not be using the
KAT500 with an Elecraft transceiver.  Occasionally I will be using my rig
via iPhone remote and want to clarify tuner operation.

Once the KAT500 has been set up with my system and antenna and then placed
on "AUTO" a brief RF transmission will automatically alert the KAT500 to
tune, correct?  I would not have to be sitting in front of the KAT500 to
manually push the "TUNE" button if I read the manual correctly.

This is my only concern about KAT500 operation as I will be using my rig
remotely at times.  Thanks in advance for your assistance and 73.


Greg
KA2COP
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[Elecraft] Fw: [Elecraft_K3] Re: OT; A question

[Richard Fjeld]

I found some pics at a site that shows a couple applications using an extension 
ladder.  Not the same pictures that I had seen, but you get the idea.  I do 
remember the ladder sides were guyed with rope to keep it from twisting in the 
wind.  The guy I'm thinking of made a hex beam using pvc pipe for spreaders.

Click on the 32 foot ladder/tower pics for ideas.

http://www.picturetrail.com/sfx/album/view/24079730

Rich, n0ce

- Original Message - 
From: Richard Fjeld 
To: elecraft...@yahoogroups.com 
Sent: Thursday, February 21, 2013 1:14 PM
Subject: Re: [Elecraft_K3] Re: OT; A question


  

Thanks to all who have been responding.  There are a lot of innovative ideas 
out there.  I had not seen this one.  Oh, to have that kind of a tower.

To have a free standing device requires a pole, or tower, likeness.  Otherwise, 
the sky is the limit with devices (pardon the pun).  I will try to find that 
extension ladder site.  It had merit.

Rich, n0ce
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[Elecraft] KAT500 for remote operation

[Greg Felter]

Hello group

I have a question about the KAT500.  Initially I will not be using the
KAT500 with an Elecraft transceiver.  Occasionally I will be using my rig
via iPhone remote and want to clarify tuner operation.

Once the KAT500 has been set up with my system and antenna and then placed
on "AUTO" a brief RF transmission will automatically alert the KAT500 to
tune, correct?  I would not have to be sitting in front of the KAT500 to
manually push the "TUNE" button if I read the manual correctly.

This is my only concern about KAT500 operation as I will be using my rig
remotely at times.  Thanks in advance for your assistance and 73.


Greg
KA2COP
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[Elecraft] OT - Way off topic Acom2000a

[Ron W3ZV]

I am try to help a friend with a problem with his Acom 2000a amp. I know 
nothing about the amp. If anyone on list has one and and would be willing to 
exchange e-mails off line, I would be most grateful.

Ron W3ZV




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Re: [Elecraft] Kansas Snowstorm

[Jack Trampler]

It sounds like she could be a future CW Ops member!  And the deal with 
the neighbors isn't bad either.  Hi Hi.


Jack - N2JT
CW Ops #640

On 2/21/2013 11:27 AM, Jim Sheldon wrote:

Been a couple years without much winter snow (or summer rain for that matter).  The old 
adage "When it rains, it pours!" certainly fit this one.  It started about 8:00 
yesterday morning and dumped around 5 inches in the first round, another inch in the 
second and then overnight it dumped another 6 inches of snow.  I think there was some 
rain in the second round as well so not absolutely sure the total.  The rainfall 
equivalent was just about 1.4 inches.

How does this relate to ham radio?  I have a heart pacemaker so not allowed to 
shovel all that snow and my wife went out last night to start on it.  Our 
neighbors came over and shoveled the walk for us.  Driveway cleared about 7 
p.m. and after a nice bit of thanks and conversation, everyone went in.  Still 
not related to ham radio?  This morning we woke up about 4:30 to the sound of 
thunder!  Yes, thundersnow!  When we finally got up around 7:30, you couldn't 
tell the driveway had even been cleared last night.

Now, comes the good part - wifey went out again and started to clear the 
driveway again.  This time, another set of neighbors, two houses down that had 
just moved in a month or so ago were out doing their own driveway.  They made a 
deal with my wife that if she would watch their two year old daughter for a 
while, they'd shovel our drive too.  She agreed and I was on 40 CW when they 
brought the little girl over.  She was fascinated listening to the CW and spent 
the whole time here in the shack with me intently listening to the CW activity. 
 She didn't even want to watch cartoons on TV.  Her dad said that was the first 
time she ever settled down immediately at someone else's house and wasn't fussy 
at all.  Especially this early in the morning.  Might have started a new ham 
career, who knows?

Anyway, this might be the first case of a K3 babysitting a two year old and 
coming out unscathed - she never tried to grab the radio knobs, key or 
anything, just sat there and smiled the whole time.  My only regret is that I 
didn't have my wife take pictures of the whole episode.  Might have to get the 
neighbors to bring her over again and see what happens.

Jim - W0EB
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--

73,
Jack - N2JT
ProLog Technical Support

*ProLog* the choice of _DX'ers Worldwide!_
  To find out why, visit us at www.prologsystem.com 



Join the ProLog Discussion Group at groups.yahoo.com/group/prologsystem 






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No virus found in this message.
Checked by AVG - www.avg.com
Version: 2013.0.2899 / Virus Database: 2639/6121 - Release Date: 02/21/13
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Re: [Elecraft] [KAT500] 10m Spur

[Fred Jensen]

On 2/21/2013 2:36 PM, Bill Hammond wrote:

I call my shack the aviary so a new birdy didn't shock me.  This one
did come along with the KAT500.  Unplug it and it goes away.


Until this thread showed up on the list, I hadn't noticed it.  We're in 
a semi-rural area [no cable, no DSL, no sewer, a well] and I host the 
Wireless company's RAP for the neighborhood at the top of my tower. 
When it went up, a variety of very weak stable signals showed up.  There 
are 3 radios up there [one for neighborhood distribution and two for 
backhaul], and I'm sure they're all contributory with local oscillators, 
clocks, and the like.  KAT500 has a controller which has a clock.


Surprising, I don't interfere with any of the RAP, it's just below the 
tribander and next to the vertex of my sloping Vee.  500W does nothing 
to it.  The good news is that in return for tower space and us powering 
it up a CAT5 cable, we get free I'net directly off the backhaul [~12 
mbps] :-)


73,

Fred K6DGW
- Northern California Contest Club
- CU in the 2013 Cal QSO Party 5-6 Oct 2013
- www.cqp.org

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[Elecraft] P3SVGA or LP-PAN / NaP3 (K3)

[paul ecker]

First, I looked in the archives and didn't really find an answer. I have a K3 
and P3 and love the combination, but seeing a P3 with a P3SVGA card in action 
at Orlando Hamcation, I have been considering adding the P3SVGA card to my P3. 
But have read some articles about the LP-Pan and I am interested in opinions on 
overall capabilities of P3/P3SVGA combo vs. LP-Pan/NaP3 combo. The individual 
items are roughly the same price. (I understand that an external sound card 
will be needed with LP-Pan) So can anyone who has experience with each, give 
some opinions on  the pluses and minus of each terms of capabilities, and 
recommendations on which way to go?

73 Paul
kc2nyu
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Re: [Elecraft] [KAT500] 10m Spur

[Bill Hammond]

I call my shack the aviary so a new birdy didn't shock me.  This one did come 
along with the KAT500.  Unplug it and it goes away.  P3 screen scrape here:  
http://www.flickr.com/photos/ak5x/8495386811/in/photostream
73,
Bill 






On Feb 21, 2013, at 11:05 AM, K1GQ wrote:

> Mine generates a clean S4 carrier at 28.004.55. Does anyone else see this, or 
> know how to move it out of the band?
> 
>  Bill, K1GQ
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Bill Hammond
wham...@aol.com
Bill Hammond-AK5X
a...@mac.com
a...@sbcglobal.net
K3 #69
P3 #817
KPA500 # 149
K2/100 #4637
K1 #2033
KX1 #1023
KX3 #583
W2
T1

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Re: [Elecraft] XV144 help please

[Don Wilhelm]

Bob,

It did produce 20 watts with 1 mW input when it was here.  And the LEDs 
are calibrated to what *my* wattmeter was reading.
My wattmeter is checked periodically against a calibrated 40 dB power 
tap and a W7ZOI Power Meter (homebrew, but calibrated).


So remove the top cover, and try adjusting R22 (the Input Attenuator) to 
see if you can bring the power up.
Please test it using a good 50 ohm dummy load that is rated for 144 MHz 
or higher.  SWR on the feedline to your new antenna could create a 
mismatch in the XV144 output Low Pass Filter and result in low power output.
Use your 30+ MHz Low Pass Filter between the K3 and the XV144 just in 
case 144 MHz RF is getting back into the K3 power level detection 
circuit and causing a false indication of K3 power output.


If all else fails, return it to me - it is still under my workmanship 
warranty and any parts needed should fall under the Elecraft warranty.


73,
Don W3FPR

On 2/21/2013 3:39 PM, kd...@denstarfarm.us wrote:

Howdy K3' people:

I finally got one of my two 15 el 144 yagis up and thus could try
hearing and sending on 2m.

I set Band 144 off, so I think that means it looks for the XV144 though
I do not have internal 2m anywaY,

However I have heard nobody and the guys wgo tried are a few hundred
miles away and may not be heard by me anyway.

I have a Daiwa wattmeter of questionable quality at 144.

It says key-down I have 5w out. The 7w green LED lights on thr
transverter.
I have Config:xvtr power to "L1.50mw" .

I am not seeing any measurable SWR where I did when I tried my long-wire
  for reference (duh).

shouldn't I see 20 watts out of that baby? I believe Don did when he put
it together.

At moment I have but one transverter in the line; others are not wired
in, are removed for the test. Their settings were set to "off" also.

So: XV144 7w Green LED is all I get, sometimes  the 10w Green LED toggles over.
Daiwa says 5 watts out.



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Re: [Elecraft] XV144 help please

[Dale Boresz]

Bob,

I use the XV144 here w/ my K3, and my Config:xvtr power is set to 
"L1.00", and that will easily drive the XV144 power LED's into the red. 
I suspect the issue is not with your K3 settings, but rather with the 
jumpers inside the XV144 and the setting of R22 that acts as an input 
attenuator.


73, Dale
WA8SRA

On 2/21/2013 3:39 PM, kd...@denstarfarm.us wrote:

Howdy K3' people:

I finally got one of my two 15 el 144 yagis up and thus could try
hearing and sending on 2m.

I set Band 144 off, so I think that means it looks for the XV144 though
I do not have internal 2m anywaY,

However I have heard nobody and the guys wgo tried are a few hundred
miles away and may not be heard by me anyway.

I have a Daiwa wattmeter of questionable quality at 144.

It says key-down I have 5w out. The 7w green LED lights on thr
transverter.
I have Config:xvtr power to "L1.50mw" .

I am not seeing any measurable SWR where I did when I tried my long-wire
  for reference (duh).

shouldn't I see 20 watts out of that baby? I believe Don did when he put
it together.

At moment I have but one transverter in the line; others are not wired
in, are removed for the test. Their settings were set to "off" also.

So: XV144 7w Green LED is all I get, sometimes  the 10w Green LED toggles over.
Daiwa says 5 watts out.


thanks



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Re: [Elecraft] [KAT500] 10m Spur

[John_N1JM]

For me it is there but doesn't move the S-meter. I can barely see it on the
P3 or SDR-IQ/SV.

73, John N1JM


Willard Myers wrote
> Mine generates a clean S4 carrier at 28.004.55. Does anyone else see this,
> or know how to move it out of the band?
> 
>   Bill, K1GQ
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-
73, John N1JM
K3 #5986
P3 #1752
KPA500 #596
KAT #575
KX3 #926
XG3
XG1
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Re: [Elecraft] XV144 help please

[K7MDL]

There are internal attenuator adjustments in your transverter.  You might
want to pop the cover and see what you got.  

It should easily get up to 20W out with the 1 mW drive, assuming you have
the right internal input settings.  That is what I use here also, 1mW drive. 
Since your wattmeter is reasonably close to the XV LED output value, your XV
LED power output display calibration is probably OK.

- Mike



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Re: [Elecraft] [KAT500] 10m Spur

[Rick Bates]

Ok, my bad for being incomplete in testing.  I've now pulled the power off
of the KAT500 and yes the signal went away completely so it is the KAT500 as
the source not one of the other numerous sources around the shack.  It is
reduced with power off, gone when the power is gone; antenna selection
varies the signal strength so perhaps a bit of leakage to the antenna ports?

It is a problem?  Not to me, it is only one frequency and so (unnaturally)
stable that I can work around it.  I'd guess that it is a clock (harmonic)
but it's VERY stable with no detectable deviation in pitch to my ear.  Most
electronic clocks wander at least a little, harmonics much more, this is
rock solid.

73,
Rick wa6nhc

-Original Message-
From: K1GQ

I'm using Elecraft cables for both connections; those cables have beads on
each end. I added two more beads to each cable while watching the spur level
with the K3 dBV meter; no effect.

FWIW, I've heard from two others KAT500 owners that hear the spur but didn't
post to the reflector. The spur is obvious on my P3.

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Re: [Elecraft] [KAT500] 10m Spur

[K1GQ]

I’m using Elecraft cables for both connections; those cables have beads on each 
end. I added two more beads to each cable while watching the spur level with 
the K3 dBV meter; no effect.

FWIW, I’ve heard from two others KAT500 owners that hear the spur but didn’t 
post to the reflector. The spur is obvious on my P3.

On 2013.02.21, at 13:57, Greg  wrote:

> Anyone try a ferrite or two clamped to the jumper between the radio
> and tuner (or between the amp and tuner)?
> 
> Greg

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Re: [Elecraft] K2 RF probe

[Don Wilhelm]

Chris,

The diagram on page 46 is for what is commonly referred to as the 
"internal counter probe"
Yes, the Probe package contains other parts for constructing an RF Probe 
(see page 9 of Appendix E for a schematic).  There are no instructions 
for constructing the RF Probe, but it is almost self explanatory.  Yes, 
the circuit traces for the RF Probe is built onto the back of the 
"Switch Spacing Tool"


73,
Don W3FPR

On 2/20/2013 4:03 PM, Christophe F8ACF-56 wrote:

Good evening to all,

I asked a question about the RF probe, I have the diagram on page 46 with the ability to 
" 10 pf" but there is another mounting tool spacing of buttons on the front 
panel with a capacity, diode, a resistor, the same probe is?




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Re: [Elecraft] [K3] VOX on the K3 - Smooth Voice Controller

[Wright, Robert]

Ray,

Right, but you'd never be aware of the delay unless the monitor was turned on.

73, Bob N7ZO


-Original Message-
From: Ray Sills [mailto:raysil...@verizon.net] 
Sent: Thursday, February 21, 2013 11:57 AM
To: Wright, Robert
Subject: Re: [Elecraft] [K3] VOX on the K3 - Smooth Voice Controller

Hi Bob:

I don't know what the delay interval is... but remember: sound travels about 
1000 feet per second, so a 1 millisecond delay is what you encounter when the 
sound source is 1 foot from you.  85 milliseconds is what you would experience 
from a source 85 feet away.
Most of the time, we are not bothered by delays of 30 milliseconds or less.

73 de Ray
K2ULR

On Feb 21, 2013, at 12:35 PM, Wright, Robert wrote:

> Eric,
>
> Interesting and neat.  I should have expected you were already on top 
> of this.  :-)
>
> I just went back to the K3 and played with it a bit.  Just by 
> listening, the monitor delay seems to be the same whether I have VOX 
> enabled or not.  This is just the normal acceptable delay I have come 
> to expect in the K3's monitor.
>
> The Smooth Voice Controller had a nominal 85mSec delay (QST article 
> April 1992 pg. 42) and, if I recall correctly, seemed much more 
> noticeable than what I am hearing in the K3.  Eric, can you comment on 
> the amount of delay used for the K3 VOXing? (Saves me setting up
> for a measurement.)   Does the monitor come before that delay?  Am I  
> hearing, in the monitor, what is being transmitted (relative to the 
> PTT-voice timing and first syllable cut-off)?
>
> Thanks, Bob N7ZO
>
>
> -Original Message-
> From: Eric Swartz - WA6HHQ, Elecraft [mailto:e...@elecraft.com]
> Sent: Thursday, February 21, 2013 8:49 AM
> To: Wright, Robert
> Cc: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] [K3] VOX on the K3 - Smooth Voice Controller
>
> This is -exactly- what we do in the DSP for the K3's VOX to eliminate 
> any cutting off of the first syllable. You can talk normally without 
> that 'Ahh' at the beginning of sentences to avoid loss of info ;-)
>
> 73,
>
> Eric
> elecraft.com
>
> On 2/21/2013 8:07 AM, Wright, Robert wrote:
>> I used to have a box from A&A Engineering called a Smooth Voice  
>> Controller.  It was a VOXer with a short audio delay line (bucket  
>> brigade IC) to allow the PTT to get to the radio before your first  
>> syllable.  The result was no clipping at the beginning of each  
>> phrase.  The only downside was that monitoring yourself with  
>> headphones was tricky with the delay.  But the VOX results were  
>> very good.
>>
>> I've always thought that this concept would be a great improvement  
>> to the K3's VOX and could be done readily in the DSP.  It could be  
>> a menu setting with the voice delay variable from 0 (normal  
>> operation) to some fixed amount.  It would only need to be enabled  
>> when VOX was on.
>>
>> 73, Bob N7ZO
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Re: [Elecraft] [K3] VOX on the K3 - Smooth Voice Controller

[Jim Brown]

On 2/21/2013 10:39 AM, Wright, Robert wrote:

The DSP Tx audio filtering adds a delay of 10 to 15 msec


I'm not a DSP programmer, but we started using DSP extensively in pro 
audio nearly 20 years ago, so as system designers, we had to learn a lot 
about how it behaves. It's helps to remember that ANY DSP takes time. 
Each A/D and D/A conversion takes time. The time difference between 
input and output is called "latency," and is a function of the 
processor, data formats, bandwidths, and rates, the processing 
algorithms, the need to minimize distortions of various sorts, and, to 
some extent, the skill of the programmer.


Delay can also be added at any point in the signal chain to accomplish 
things like the technique described to improve VOX action.  Another use 
is improving response time for peak limiting -- the main signal path has 
a bit of delay added before the limiting block, but the detector and 
control to the limiting block are un-delayed (or have no intentional 
delay).


The human brain has varying sensitivity to delay, depending on many 
factors. Most of us are not bothered by hearing a copy of our own speech 
delayed less than about 10 msec; increase that delay to more than about 
50 msec and we have trouble talking.  Most sound system professionals 
have heard even the best announcers slow down and stop talking when 
confronted with 100 msec of delay, which is what happens when the talker 
is 120 ft or so from the speakers in a big sound system.


73, Jim K9YC

.
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[Elecraft] XV144 help please

[kd7yz]

Howdy K3' people:

I finally got one of my two 15 el 144 yagis up and thus could try
hearing and sending on 2m.

I set Band 144 off, so I think that means it looks for the XV144 though
I do not have internal 2m anywaY,

However I have heard nobody and the guys wgo tried are a few hundred
miles away and may not be heard by me anyway.

I have a Daiwa wattmeter of questionable quality at 144.

It says key-down I have 5w out. The 7w green LED lights on thr
transverter.
I have Config:xvtr power to "L1.50mw" .

I am not seeing any measurable SWR where I did when I tried my long-wire
 for reference (duh).

shouldn't I see 20 watts out of that baby? I believe Don did when he put
it together.

At moment I have but one transverter in the line; others are not wired
in, are removed for the test. Their settings were set to "off" also.

So: XV144 7w Green LED is all I get, sometimes  the 10w Green LED toggles over.
Daiwa says 5 watts out.


thanks

-- 
73
KD7YZ Bob

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Re: [Elecraft] [KAT500] 10m Spur

[Greg]

Anyone try a ferrite or two clamped to the jumper between the radio
and tuner (or between the amp and tuner)?

Greg

On 2/21/13, Charles Johnson  wrote:
> I agree with Bill, K1GC, the signal is internal to the KAT500. Switching the
> KAT500 to bypass reduces it, but only disconnecting the 12 VDC line to the
> KAT500 gets rid of it completely. NOT an external signal. Seems to be coming
> into the K3 via common mode.
>
> Charles, K4ZRJ
>
>
>
> On Feb 21, 2013, at 12:05 PM, K1GQ  wrote:
>
>> Mine generates a clean S4 carrier at 28.004.55. Does anyone else see this,
>> or know how to move it out of the band?
>>
>>  Bill, K1GQ
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Re: [Elecraft] [KAT500] 10m Spur

[Charles Johnson]

I agree with Bill, K1GC, the signal is internal to the KAT500. Switching the 
KAT500 to bypass reduces it, but only disconnecting the 12 VDC line to the 
KAT500 gets rid of it completely. NOT an external signal. Seems to be coming 
into the K3 via common mode.

Charles, K4ZRJ



On Feb 21, 2013, at 12:05 PM, K1GQ  wrote:

> Mine generates a clean S4 carrier at 28.004.55. Does anyone else see this, or 
> know how to move it out of the band?
> 
>  Bill, K1GQ
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Re: [Elecraft] [K3] VOX on the K3 - Smooth Voice Controller

[Wright, Robert]

Thanks Lyle for the good explanation.  And, Rich, yes, I found CONFIG:TX MON in 
the PDF manual.  (It was not in my printed manual.)  Mine is set to Normal.

So the VOX PTT to voice delay is an artifact of the DSP filtering delays.  And 
the difference I was hearing (and remember of the Smooth Voice Controller) is 
the difference between the 10-15mSec and 85mSec.

So let me reword my original comments:  It would be really neat if the K3 had a 
setting for 85mSec or so of voice delay on the VOX.  The current 10-15mSec is 
better than zero but still does not approach the really smooth VOXing achieved 
by the A&A box at 85mSec or so.

Love my K3 even if it doesn't have 85mSec.  This is just frosting on the VOX.  
:-)

73, Bob N7ZO

-Original Message-
From: elecraft-boun...@mailman.qth.net 
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Lyle Johnson
Sent: Thursday, February 21, 2013 10:19 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] [K3] VOX on the K3 - Smooth Voice Controller

The DSP Tx audio filtering adds a delay of 10 to 15 msec (I don't remember the 
exact value off the top of my head) but the VOX detector is before the 
filtering.  The net result is that very little, if any, of the first syllable 
is clipped when using VOX.

The monitor is derived from the 15 kHz IF within the DSP, which only happen 
when the radio is in transmit, so you can hear if any syllable truncation is 
occurring and adjust things accordingly. There is an menu option to bypass the 
15 kHz IF demodulation for monitoring and just pass the audio through, but this 
is bypassed when you adjust mic gain or clipping so you can hear the effect of 
the adjustment.

73,

Lyle KK7P

-

Eric, 

Interesting and neat.  I should have expected you were already on top of this.  
:-)

 I just went back to the K3 and played with it a bit.  Just by listening, the 
monitor delay seems to be the same whether I have VOX enabled or not.  This is 
just the normal acceptable delay I have come to expect in the K3's monitor.

The Smooth Voice Controller had a nominal 85mSec delay (QST article April 1992 
pg. 42) and, if I recall correctly, seemed much more noticeable than what I am 
hearing in the K3.  Eric, can you comment on the amount of delay used for the 
K3 VOXing? (Saves me setting up for a measurement.)   Does the monitor come 
before that delay?  Am I hearing, in the monitor, what is being transmitted 
(relative to the PTT-voice timing and first syllable cut-off)?

Thanks, Bob N7ZO


-Original Message-
From: Eric Swartz - WA6HHQ, Elecraft [mailto:e...@elecraft.com] 
Sent: Thursday, February 21, 2013 8:49 AM
To: Wright, Robert
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] [K3] VOX on the K3 - Smooth Voice Controller

This is -exactly- what we do in the DSP for the K3's VOX to eliminate any 
cutting off of the first syllable. You can talk normally without that 'Ahh' at 
the beginning of sentences to avoid loss of info ;-)

73,

Eric
elecraft.com

On 2/21/2013 8:07 AM, Wright, Robert wrote:
> I used to have a box from A&A Engineering called a Smooth Voice Controller.  
> It was a VOXer with a short audio delay line (bucket brigade IC) to allow the 
> PTT to get to the radio before your first syllable.  The result was no 
> clipping at the beginning of each phrase.  The only downside was that 
> monitoring yourself with headphones was tricky with the delay.  But the VOX 
> results were very good.
>
> I've always thought that this concept would be a great improvement to the 
> K3's VOX and could be done readily in the DSP.  It could be a menu setting 
> with the voice delay variable from 0 (normal operation) to some fixed amount. 
>  It would only need to be enabled when VOX was on.
>
> 73, Bob N7ZO
>
>
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Re: [Elecraft] [K3] VOX on the K3 - Smooth Voice Controller

[Lyle Johnson]

The DSP Tx audio filtering adds a delay of 10 to 15 msec (I don't 
remember the exact value off the top of my head) but the VOX detector is 
before the filtering.  The net result is that very little, if any, of 
the first syllable is clipped when using VOX.


The monitor is derived from the 15 kHz IF within the DSP, which only 
happen when the radio is in transmit, so you can hear if any syllable 
truncation is occurring and adjust things accordingly. There is an menu 
option to bypass the 15 kHz IF demodulation for monitoring and just pass 
the audio through, but this is bypassed when you adjust mic gain or 
clipping so you can hear the effect of the adjustment.


73,

Lyle KK7P
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Re: [Elecraft] [K3] VOX on the K3 - Smooth Voice Controller

[Richard Fjeld]

Just a note to say that I recall the monitor delay is adjustable in the Config 
menu.

Rich, n0ce

  - Original Message - 
  From: Wright, Robert 
  To: e...@elecraft.com 
  Cc: elecraft@mailman.qth.net 
  Sent: Thursday, February 21, 2013 11:35 AM
  Subject: Re: [Elecraft] [K3] VOX on the K3 - Smooth Voice Controller


  Eric, 

  Interesting and neat.  I should have expected you were already on top of 
this.  :-)

   I just went back to the K3 and played with it a bit.  Just by listening, the 
monitor delay seems to be the same whether I have VOX enabled or not.  This is 
just the normal acceptable delay I have come to expect in the K3's monitor.

  The Smooth Voice Controller had a nominal 85mSec delay (QST article April 
1992 pg. 42) and, if I recall correctly, seemed much more noticeable than what 
I am hearing in the K3.  Eric, can you comment on the amount of delay used for 
the K3 VOXing? (Saves me setting up for a measurement.)   Does the monitor come 
before that delay?  Am I hearing, in the monitor, what is being transmitted 
(relative to the PTT-voice timing and first syllable cut-off)?

  Thanks, Bob N7ZO


  -Original Message-
  From: Eric Swartz - WA6HHQ, Elecraft [mailto:e...@elecraft.com] 
  Sent: Thursday, February 21, 2013 8:49 AM
  To: Wright, Robert
  Cc: elecraft@mailman.qth.net
  Subject: Re: [Elecraft] [K3] VOX on the K3 - Smooth Voice Controller

  This is -exactly- what we do in the DSP for the K3's VOX to eliminate any 
cutting off of the first syllable. You can talk normally without that 'Ahh' at 
the beginning of sentences to avoid loss of info ;-)

  73,

  Eric
  elecraft.com

  On 2/21/2013 8:07 AM, Wright, Robert wrote:
  > I used to have a box from A&A Engineering called a Smooth Voice Controller. 
 It was a VOXer with a short audio delay line (bucket brigade IC) to allow the 
PTT to get to the radio before your first syllable.  The result was no clipping 
at the beginning of each phrase.  The only downside was that monitoring 
yourself with headphones was tricky with the delay.  But the VOX results were 
very good.
  >
  > I've always thought that this concept would be a great improvement to the 
K3's VOX and could be done readily in the DSP.  It could be a menu setting with 
the voice delay variable from 0 (normal operation) to some fixed amount.  It 
would only need to be enabled when VOX was on.
  >
  > 73, Bob N7ZO
  >
  >
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[Elecraft] K2 RF probe

[Christophe F8ACF-56]

Good evening to all,

I asked a question about the RF probe, I have the diagram on page 46 with the 
ability to " 10 pf" but there is another mounting tool spacing of buttons on 
the front panel with a capacity, diode, a resistor, the same probe is?

http://cjoint.com/?CBuv2IFpL0f

is what I'm confused?


while Miss the right solution

thank you for your help

# 7369, Cris F8ACF

 
73 , Christophe F8ACF-56
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Re: [Elecraft] [KAT500] 10m Spur

[K1GQ]

On 2013.02.21, at 12:39, Rick Bates  wrote:

> Analysis: it isn't the KAT500.  The signal is coming from another external 
> source.  

Not true in my case. The only way to completely suppress my spur is to remove 
12VDC power to my KAT500 by disconnecting the power cable. Turning the KAT500 
“off” isn’t enough because the internal electronics are still alive.

  Bill, K1GQ
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Re: [Elecraft] [KAT500] 10m Spur

[Rick Bates]

I have a signal there too.  Switching off the KAT500 reduces it, but that is 
due to the default antenna selection on power off.  Changing antennas reduces 
the signal level (the 2nd antenna is nearer to the house).  

If I switch the K3 antenna source (no antenna connected to port 2) it is 
completely gone and the tuner sits atop the K3. 

Analysis: it isn't the KAT500.  The signal is coming from another external 
source.  

With the numerous computers, power supplies, radios, radiating HDMI cables in 
the house, I'm simply going to let this one (like many others) pass. 

Rick wa6nhc

Tiny iPhone 5 keypad, typos are inevitable

On Feb 21, 2013, at 9:05 AM, K1GQ  wrote:

> Mine generates a clean S4 carrier at 28.004.55. Does anyone else see this, or 
> know how to move it out of the band?
> 
>  Bill, K1GQ
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Re: [Elecraft] [K3] VOX on the K3 - Smooth Voice Controller

[Wright, Robert]

Eric, 

Interesting and neat.  I should have expected you were already on top of this.  
:-)

 I just went back to the K3 and played with it a bit.  Just by listening, the 
monitor delay seems to be the same whether I have VOX enabled or not.  This is 
just the normal acceptable delay I have come to expect in the K3's monitor.

The Smooth Voice Controller had a nominal 85mSec delay (QST article April 1992 
pg. 42) and, if I recall correctly, seemed much more noticeable than what I am 
hearing in the K3.  Eric, can you comment on the amount of delay used for the 
K3 VOXing? (Saves me setting up for a measurement.)   Does the monitor come 
before that delay?  Am I hearing, in the monitor, what is being transmitted 
(relative to the PTT-voice timing and first syllable cut-off)?

Thanks, Bob N7ZO


-Original Message-
From: Eric Swartz - WA6HHQ, Elecraft [mailto:e...@elecraft.com] 
Sent: Thursday, February 21, 2013 8:49 AM
To: Wright, Robert
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] [K3] VOX on the K3 - Smooth Voice Controller

This is -exactly- what we do in the DSP for the K3's VOX to eliminate any 
cutting off of the first syllable. You can talk normally without that 'Ahh' at 
the beginning of sentences to avoid loss of info ;-)

73,

Eric
elecraft.com

On 2/21/2013 8:07 AM, Wright, Robert wrote:
> I used to have a box from A&A Engineering called a Smooth Voice Controller.  
> It was a VOXer with a short audio delay line (bucket brigade IC) to allow the 
> PTT to get to the radio before your first syllable.  The result was no 
> clipping at the beginning of each phrase.  The only downside was that 
> monitoring yourself with headphones was tricky with the delay.  But the VOX 
> results were very good.
>
> I've always thought that this concept would be a great improvement to the 
> K3's VOX and could be done readily in the DSP.  It could be a menu setting 
> with the voice delay variable from 0 (normal operation) to some fixed amount. 
>  It would only need to be enabled when VOX was on.
>
> 73, Bob N7ZO
>
>
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[Elecraft] [KAT500] 10m Spur

[K1GQ]

Mine generates a clean S4 carrier at 28.004.55. Does anyone else see this, or 
know how to move it out of the band?

  Bill, K1GQ
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Re: [Elecraft] [K3] VOX on the K3 - Smooth Voice Controller

[Eric Swartz - WA6HHQ, Elecraft]

This is -exactly- what we do in the DSP for the K3's VOX to eliminate 
any cutting off of the first syllable. You can talk normally without 
that 'Ahh' at the beginning of sentences to avoid loss of info ;-)


73,

Eric
elecraft.com

On 2/21/2013 8:07 AM, Wright, Robert wrote:

I used to have a box from A&A Engineering called a Smooth Voice Controller.  It 
was a VOXer with a short audio delay line (bucket brigade IC) to allow the PTT to 
get to the radio before your first syllable.  The result was no clipping at the 
beginning of each phrase.  The only downside was that monitoring yourself with 
headphones was tricky with the delay.  But the VOX results were very good.

I've always thought that this concept would be a great improvement to the K3's 
VOX and could be done readily in the DSP.  It could be a menu setting with the 
voice delay variable from 0 (normal operation) to some fixed amount.  It would 
only need to be enabled when VOX was on.

73, Bob N7ZO



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Re: [Elecraft] Kansas Snowstorm

[Matthew Zilmer]

Next time, demo your straight key or paddle for her.  

If she's too young to have a lot of language skills yet, now is the time to 
learn!  CW is, after all, a language.

73

Matt Zilmer
Consultant - Product Management Dept.
Magellan Navigation / MiTAC Digital Corp.
Tel: (909) 394-6052
Cell: (909) 730-6552
In status quo voluntas non sufficit


-Original Message-
From: elecraft-boun...@mailman.qth.net 
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim Sheldon
Sent: Thursday, February 21, 2013 8:28 AM
To: Elecraft Mailing List
Subject: [Elecraft] Kansas Snowstorm

Been a couple years without much winter snow (or summer rain for that matter).  
The old adage "When it rains, it pours!" certainly fit this one.  It started 
about 8:00 yesterday morning and dumped around 5 inches in the first round, 
another inch in the second and then overnight it dumped another 6 inches of 
snow.  I think there was some rain in the second round as well so not 
absolutely sure the total.  The rainfall equivalent was just about 1.4 inches.

How does this relate to ham radio?  I have a heart pacemaker so not allowed to 
shovel all that snow and my wife went out last night to start on it.  Our 
neighbors came over and shoveled the walk for us.  Driveway cleared about 7 
p.m. and after a nice bit of thanks and conversation, everyone went in.  Still 
not related to ham radio?  This morning we woke up about 4:30 to the sound of 
thunder!  Yes, thundersnow!  When we finally got up around 7:30, you couldn't 
tell the driveway had even been cleared last night.

Now, comes the good part - wifey went out again and started to clear the 
driveway again.  This time, another set of neighbors, two houses down that had 
just moved in a month or so ago were out doing their own driveway.  They made a 
deal with my wife that if she would watch their two year old daughter for a 
while, they'd shovel our drive too.  She agreed and I was on 40 CW when they 
brought the little girl over.  She was fascinated listening to the CW and spent 
the whole time here in the shack with me intently listening to the CW activity. 
 She didn't even want to watch cartoons on TV.  Her dad said that was the first 
time she ever settled down immediately at someone else's house and wasn't fussy 
at all.  Especially this early in the morning.  Might have started a new ham 
career, who knows?

Anyway, this might be the first case of a K3 babysitting a two year old and 
coming out unscathed - she never tried to grab the radio knobs, key or 
anything, just sat there and smiled the whole time.  My only regret is that I 
didn't have my wife take pictures of the whole episode.  Might have to get the 
neighbors to bring her over again and see what happens.

Jim - W0EB
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[Elecraft] Kansas Snowstorm

[Jim Sheldon]

Been a couple years without much winter snow (or summer rain for that matter).  
The old adage "When it rains, it pours!" certainly fit this one.  It started 
about 8:00 yesterday morning and dumped around 5 inches in the first round, 
another inch in the second and then overnight it dumped another 6 inches of 
snow.  I think there was some rain in the second round as well so not 
absolutely sure the total.  The rainfall equivalent was just about 1.4 inches.

How does this relate to ham radio?  I have a heart pacemaker so not allowed to 
shovel all that snow and my wife went out last night to start on it.  Our 
neighbors came over and shoveled the walk for us.  Driveway cleared about 7 
p.m. and after a nice bit of thanks and conversation, everyone went in.  Still 
not related to ham radio?  This morning we woke up about 4:30 to the sound of 
thunder!  Yes, thundersnow!  When we finally got up around 7:30, you couldn't 
tell the driveway had even been cleared last night.

Now, comes the good part - wifey went out again and started to clear the 
driveway again.  This time, another set of neighbors, two houses down that had 
just moved in a month or so ago were out doing their own driveway.  They made a 
deal with my wife that if she would watch their two year old daughter for a 
while, they'd shovel our drive too.  She agreed and I was on 40 CW when they 
brought the little girl over.  She was fascinated listening to the CW and spent 
the whole time here in the shack with me intently listening to the CW activity. 
 She didn't even want to watch cartoons on TV.  Her dad said that was the first 
time she ever settled down immediately at someone else's house and wasn't fussy 
at all.  Especially this early in the morning.  Might have started a new ham 
career, who knows?

Anyway, this might be the first case of a K3 babysitting a two year old and 
coming out unscathed - she never tried to grab the radio knobs, key or 
anything, just sat there and smiled the whole time.  My only regret is that I 
didn't have my wife take pictures of the whole episode.  Might have to get the 
neighbors to bring her over again and see what happens.

Jim - W0EB
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[Elecraft] [K3] VOX on the K3 - Smooth Voice Controller

[Wright, Robert]

I used to have a box from A&A Engineering called a Smooth Voice Controller.  It 
was a VOXer with a short audio delay line (bucket brigade IC) to allow the PTT 
to get to the radio before your first syllable.  The result was no clipping at 
the beginning of each phrase.  The only downside was that monitoring yourself 
with headphones was tricky with the delay.  But the VOX results were very good.

I've always thought that this concept would be a great improvement to the K3's 
VOX and could be done readily in the DSP.  It could be a menu setting with the 
voice delay variable from 0 (normal operation) to some fixed amount.  It would 
only need to be enabled when VOX was on.

73, Bob N7ZO

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[Elecraft] ATT: Howard

[Syl Heumann]

Hi - \\\Forgot to give you the error messages,

d=100
err IOA

After a hit of "Disp", It changes to IOB

Next hit of "Disp" appears normal,  VFO works, but no receive or xmit.  

syl

s...@syl.net




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Re: [Elecraft] VOX on the K3

[K5HM]

Thanks for all the positive comments on the K3 VOX.  I have a Goldline mic
and am just waiting for the boom to arrive so I can set it up.  

Contesting is my thing and I was hoping that VOX would allow hands free
without having to use a foot switch.  

73,
Ron, K5HM
k5hm@gmail.com
www.qrz.com/db/k5hm

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Re: [Elecraft] VOX on the K3

[Todd - k1tm]

I only use VOX on the K3.  Set correctly (using the noise gate), even with my
amp's fan running just feet away, I have no issues with false triggering, or
clipped syllables.  I use a headset when I want to put my feet up and sit
back, or a Heil Gold line mike on a boom with a shock mount.  It is the best
VOX operation of any rig that I have used in 35 years of operating.  I
highly recommend you try it.  

73, Todd.



--
View this message in context: 
http://elecraft.365791.n2.nabble.com/VOX-on-the-K3-tp7570165p7570181.html
Sent from the Elecraft mailing list archive at Nabble.com.
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[Elecraft] *FOR SALE* Elecraft AF1 w/ W8FGU enclosure

[John Shadle]

Continuing to pare down the shack. I offer my Elecraft AF1 ($59.95)
and the W8FGU Lexan enclosure ($29.95).

Works very well to bring the signals out of the noise.

Filters: Variable Cutoff Low pass filter (SSB/CW) plus two levels of
narrow CW bandpass filtering with tunable center frequency.
Built-in audio amplifier with volume control.
Power: 9V battery or external 12 to 14 VDC

Photo looks like this (photos available upon request):
http://w8fgu.home.comcast.net/~w8fgu/pics/enclosures/AF1/AF1-Finished.jpg

Asking $75 + shipping to your QTH  [Total value $89.90.]. Check, money
order, or bank cheque preferred.

73
-john W4PAH
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[Elecraft] k3 + MH2 handMic + Microkeyer II interface + THP HL 1.5KFX

[Ricardo PY2PT]

Dear Guys, 


Please, I'm looking for friends with K3 + hand mic MH2 + MKII interface + THP 
HL 1.5KFX.

If possible, could you send me a private e-mail, ok?
I have some questions about all the configuration and would like to share some 
experiences.


Best 73


Ricardo Rodrigues - PY2PT
py2pt.bra...@gmail.com
http://www.py2pt.com
@ricrodrigues
TO2FH (Mayotte Island - 2011) team member
8R1PY team member (2012)
T30PY/T30SIX team member (2012)
http://www.mdxc.org/t30py
http://www.facebook.com/t30py
@t30py







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