Re: [Elecraft] K3 Sub-receiver RIT

[Bob Wilson, N6TV]

On Sun, Jan 13, 2019 at 9:15 AM K9MA  wrote:

> I've found that during some contest operation, it's handy to call CQ on
> VFO B, while using VFO A to search and pounce. (Known as Single Operator
> 2 VFO mode, SO2V.) That way, when unassisted, I can use the P3 to locate
> promising signals. However, I sometimes wish the RIT would work with the
> sub-receiver on VFO B. Has anyone found a way to do this? Even better
> would be to have RIT on VFO B and XIT on VFO A.
>

When running SO2V unassisted, I find it easiest to do the opposite:  CQ on
VFO A, and S&P on VFO B.  Then you can have the RIT on A and watch the VFO
B cursor track VFO B.  Of course if you get too far away from your run
frequency, you'll have to increase the P3 span so that you can still the
VFO B cursor, but this is the best way around this problem for now, without
resorting to extra hardware.

Of course assisted operators can just send a spot to VFO B to have a listen.

73,
Bob, N6TV
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Re: [Elecraft] Non-Resonant Antennas and Chokes

[Jim Brown]

On 1/14/2019 6:32 PM, Wes Stewart wrote:
You do realize that if the common-mode current on the line is due to 
asymmetry between the antenna and the line, then choking at the 
feed-point reduces the CM current at that point, but just like your 
example said, a quarter wave *down* the line you have a CM peak. 


Yes, but the choke at the feedpoint prevents that common mode current 
coupling to/from the antenna, which is how it gets inside the feedline 
as a differential mode signal. And the common mode current on the line 
below the choke is that induced by the field from the antenna, not from 
any imbalance in the antenna.


If asymmetry isn't an issue then open wire is just fine with a balun 
at the tuner and I say this while not being a fan of open wire fed 
antennas.
And it's also not an issue if you have no local noise sources, a luxury 
that I think you said you have.


I'm also somewhat bemused by the cottage industry that's sprung up in 
the last few years to calm the hand wringing about common mode 
current.  I think there's been a lot of development of cures that are 
looking for ailments.  In my curmudgeonly opinion of course :-)


If you had local noise you might view things differently. :) FWIW, I 
wasn't the first to realize the relationship between common mode current 
and RX noise -- I picked up on it from a long treatise that W1HIS wrote 
around the time I was doing my work. And I contributed pieces of the 
puzzle that he didn't know about, most importantly, the equivalent 
circuit of a choke and the importance of a high resistive impedance.


73, Jim K9YC

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Re: [Elecraft] 500Hz Filter Offset Question

[donovanf]

oops. The Elecraft 500 Hz 8 pole filter is discontinued... 


http://www.inrad.net/product.php?productid=316&cat=140 


73 
Frank 
W3LPL 

- Original Message -

From: "Mark Musick"  
To: "Rich" , donw...@embarqmail.com, "Elecraft" 
 
Sent: Tuesday, January 15, 2019 12:17:05 AM 
Subject: Re: [Elecraft] 500Hz Filter Offset Question 

INRAD has 500Hz 8 pole filters for the K3/K3S. 
I have one in the main receiver and one in the sub-receiver. 

Mark, WB9CIF 

-Original Message- 
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of Rich 
Sent: Monday, January 14, 2019 23:56 
To: donw...@embarqmail.com; Elecraft  
Subject: Re: [Elecraft] 500Hz Filter Offset Question 

Thanks all. I did read the manual, but it would help if I had read the entire 
paragraph and not just one sentence. 

In this case they sent me all matching offsets, so they are all the same. 

I was surprised that they do not have 500hz 8 pole. 

Oh well, back to putting the radio back together 

Ric 

On 1/14/2019 18:42 PM, Don Wilhelm wrote: 
> Rich, 
> 
> Wrong - you must enter the offset frequency. 
> Related - what is true is that you do not need matched filters in the 
> main and the subRX for Diversity reception with the new synthesizers. 
> 
> There are plots on the Elecraft website showing the filter response. I 
> don't recall if the 500 Hz filters are included. 
> 
> 73, 
> Don W3FPR 
> 
> On 1/14/2019 5:30 PM, Rich wrote: 
>> 
>> So now that I have 5 pole filters, I seem to recall that entering the 
>> offset freq is not required any longer on the K3S, is that true? 
>> 
>> Also does a K3 upgraded with K3S features need the offset freq? 
>> 
>> I should mention that they are all matched. 
>> 
> 
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Re: [Elecraft] KPA500 & Drake TR7

[Walter Underwood]

I know nothing about the TR7, but I searched the web for "drake tr7 output 
power adjustment” and found this useful-looking page, with photos.

http://www.wb4hfn.com/DRAKE/DrakeArticles/TR7_ALC_Control/TR7%20ACL%20Control.htm
 


wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)

> On Jan 14, 2019, at 7:56 PM, Gary Smith  wrote:
> 
> I hesitate to answer to this, it's been so 
> long since I had a TR7 (My 2nd rig) and my 
> memory of it is not clear.
> 
> Given this disclaimer, I believe you'll 
> find an adjustable piece, two wafers with 
> a rectangular key hole in the center part 
> to turn it. Cap or resistance, I don't 
> recall what it was, but it controlled the 
> output and you could lower it way down or 
> get more than the rated output with it (at 
> the expense of the transistors if you 
> pushed it too long).
> 
> I wish I could remember exactly where it 
> was, but I believe it was on the heatsink 
> or close to it at the back side of the 
> rig. Might have been blue, I'm not sure, 
> maybe it was accessible from the outside 
> of the radio, from the bottom rear? I 
> think I'd remember it if I saw the TR7 
> again, the adjustment was in plain sight. 
> 
> I suspect if you backed it down you'll be 
> fine with the output from the KPA-500.
> 
> For some time the TR7 was used for EME, 
> the person who bought mine was modding it 
> for that and perhaps in an EME group 
> someone might have good knowledge of the 
> TR7 and where this was exactly located.
> 
> 73,
> 
> Gary
> KA1J
> 
> 
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Re: [Elecraft] KPA500 & Drake TR7

[Gary Smith]

I hesitate to answer to this, it's been so 
long since I had a TR7 (My 2nd rig) and my 
memory of it is not clear.

Given this disclaimer, I believe you'll 
find an adjustable piece, two wafers with 
a rectangular key hole in the center part 
to turn it. Cap or resistance, I don't 
recall what it was, but it controlled the 
output and you could lower it way down or 
get more than the rated output with it (at 
the expense of the transistors if you 
pushed it too long).

I wish I could remember exactly where it 
was, but I believe it was on the heatsink 
or close to it at the back side of the 
rig. Might have been blue, I'm not sure, 
maybe it was accessible from the outside 
of the radio, from the bottom rear? I 
think I'd remember it if I saw the TR7 
again, the adjustment was in plain sight. 

I suspect if you backed it down you'll be 
fine with the output from the KPA-500.

For some time the TR7 was used for EME, 
the person who bought mine was modding it 
for that and perhaps in an EME group 
someone might have good knowledge of the 
TR7 and where this was exactly located.

73,

Gary
KA1J


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[Elecraft] WTB: KIO2 board

[Alan D. Wilcox]

Hello,

I need a spare KIO2 board … 
Reply off list please.

Cheers,

Alan D. Wilcox, W3DVX
570-916-9590 (cell, text)
https://WilcoxEngineering.com
http://www.eham.net/reviews/detail/6768 ... Elecraft Client Comments

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Re: [Elecraft] K3 Sub-receiver RIT

[K9MA]

On 1/14/2019 19:55, j...@kk9a.com wrote:

  Is the issue the way the P3 is used to move in on a signal?


Yes, that is exactly the issue. When unassisted, using the P3 is the 
best method I've found for finding new contacts. However, the span has 
to be 10 kHz, or it's too hard to resolve cw signals. (I know, I could 
add a VGA display.) Other than the RIT issue, running on VFO B and the 
sub rx works well.


If there were a setting, say, to make the RIT apply to VFO B only when 
the sub was on, the problem would be solved.


73,

Scott K9MA

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Re: [Elecraft] Query for new DSP features

[Wes Stewart]

https://www.youtube.com/watch?v=FrVDL_-HOds starting at 41 minutes.  
Particularly at 1 hour 3 minutes.


On 1/12/2019 9:51 AM, David Woolley wrote:

Do you have a reference for an algorithm that will do this?

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Re: [Elecraft] Non-Resonant Antennas and Chokes

[Wes Stewart]

You do realize that if the common-mode current on the line is due to asymmetry 
between the antenna and the line, then choking at the feed-point reduces the CM 
current at that point, but just like your example said, a quarter wave *down* 
the line you have a CM peak.  If asymmetry isn't an issue then open wire is just 
fine with a balun at the tuner and I say this while not being a fan of open wire 
fed antennas.


I'm also somewhat bemused by the cottage industry that's sprung up in the last 
few years to calm the hand wringing about common mode current.  I think there's 
been a lot of development of cures that are looking for ailments.  In my 
curmudgeonly opinion of course :-)


Wes N7WS

,  On 1/13/2019 10:24 PM, Jim Brown wrote:
WHERE are you measuring it? You do realize that, like any antenna, current 
varies along the wires that make up the antenna. A choke attempts to force the 
current to zero AT THE POINT WHERE THE CHOKE IS PLACED. You're putting it at 
the tuner, so it forces current to zero there. But a quarter wave up the 
feedline, the current reaches a maximum value. 


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[Elecraft] K3 Sub-receiver RIT

[john]

If you have a K-Pod it is just as easy to tune with VFO B while running on
A. Is the issue the way the P3 is used to move in on a signal? I have K-Pod
buttons to turn RIT on and off and also to clear the offset.

John KK9A


K9MA wrote: 

I've found that during some contest operation, it's handy to call CQ on 
VFO B, while using VFO A to search and pounce. (Known as Single Operator 
2 VFO mode, SO2V.) That way, when unassisted, I can use the P3 to locate 
promising signals. However, I sometimes wish the RIT would work with the 
sub-receiver on VFO B. Has anyone found a way to do this? Even better 
would be to have RIT on VFO B and XIT on VFO A.

If it's not currently possible, I'd add it to my firmware wish list.

73,

Scott K9MA

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Re: [Elecraft] KAT3A & KIO3B Upgrade for my K3

[Don Wilhelm]

Joseph,

Get yourself a *new* #1 phillips screwdriver (if your screwdriver tip 
looks shiny, it is worn, throw it away).  If you are trying to use a #2 
(the most common phillips), then get a #1. You may be wise to replace 
the stripped screws.  Consider the Stainless Steel screw kit from 
Elecraft - it may be less expensive than ordering the screws one by one.


Congratulations on finishing the K1.

73,
Don W3FPR

On 1/14/2019 8:36 PM, Joseph M. Durnal wrote:
KAT3A and KIO3B installed!  Had a scare as I couldn't remove the 
bottom center screw on the right side panel, it started stripping.  I 
had this issue on one of the front panel screws about a year ago when 
I was trying to replace my VFO B encoder.  I was able to get the KAT3A 
installed without completely removing the right side panel.


I should have spring for over night shipping, I was counting on the 
USPS to get it to me by Friday, but the package didn't arrive until 
today.  Elecraft shipped it on Wednesday, but I guess since they 
aren't Amazon, the USPS doesn't bend over backward for them.


The good news was while waiting for the K3 upgrades, I finally 
finished soldering the K1.  That's been a 10 year odyssey, that I'll 
write about at a later date.  I need to find the power cable I made up 
for it to finish testing and to get it on the air.  That's what 
happens when you take over 10 years to build a kit.


Back on the subject, ahh, it is nice to have a little less clutter on 
the desk.  The KAT3A tunes my antenna on all bands, even 160, which 
was a shock!  Not that I'll be doing much down there with my indoor 
attic antenna. I might buy one of the custom FSK interfaces, mine 
looks like something between a spider and a plate of spaghetti.





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Re: [Elecraft] SWR on 40M band

[Dragan 4O4A]

Don,

Dummy load is OK, I tested it with another radio (IC-7300) which shows 1:1
SWR.
Thanks for advice about Support. I will certainly contact them.

73,
Dragan, 4O4A



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Re: [Elecraft] KAT3A & KIO3B Upgrade for my K3

[Joseph M. Durnal]

KAT3A and KIO3B installed!  Had a scare as I couldn't remove the bottom
center screw on the right side panel, it started stripping.  I had this
issue on one of the front panel screws about a year ago when I was trying
to replace my VFO B encoder.  I was able to get the KAT3A installed without
completely removing the right side panel.

I should have spring for over night shipping, I was counting on the USPS to
get it to me by Friday, but the package didn't arrive until today.
Elecraft shipped it on Wednesday, but I guess since they aren't Amazon, the
USPS doesn't bend over backward for them.

The good news was while waiting for the K3 upgrades, I finally finished
soldering the K1.  That's been a 10 year odyssey, that I'll write about at
a later date.  I need to find the power cable I made up for it to finish
testing and to get it on the air.  That's what happens when you take over
10 years to build a kit.

Back on the subject, ahh, it is nice to have a little less clutter on the
desk.  The KAT3A tunes my antenna on all bands, even 160, which was a
shock!  Not that I'll be doing much down there with my indoor attic
antenna. I might buy one of the custom FSK interfaces, mine looks like
something between a spider and a plate of spaghetti.

Anyone in the market for an original K3 I/O board?

73 de Joseph M. Durnal - NE3R



On Thu, Jan 10, 2019 at 10:39 PM Brian Hunt  wrote:

> I bet the KEY macro in N1MM+ would work. Purely speculation on my part
> since I haven't tried it but it works fine for CW.
>
> 73,
> Brian, K0DTJ
>
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Re: [Elecraft] SWR on 40M band

[Don Wilhelm]

Dragon,

Just to eliminate the dummy load from questions, have you checked that 
dummy load with an antenna analyzer on 40 meters?  If not, please do 
that just to keep it above suspicion.


I certainly don't know the answer.  If you cannot identify the problem 
source, an email to supp...@elecraft.com may provide additional information.


73,
Don W3FPR

On 1/14/2019 7:52 PM, Dragan 4O4A wrote:

Hi Don,
Thanks for prompt reply.

No KAT3 installed.
I'm aware that it is not a big deal, it's just annoying.
However, I would like to understand what caused it and how to fix it - if it
is a simple solution.


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Re: [Elecraft] K3 Sub-receiver RIT

[K9MA]

Thanks, Gernot. I came to the same conclusion. I also tried using 
"BSET", but it doesn't enable the RIT on VFO B. Maybe a firmware update 
could fix that?


73,
Scott K9MA


On 1/14/2019 19:01, g...@gmx.net wrote:

Scott,
I looked at the programmer ref manual and realized there is only one 
RIT/XIT, which is controlling VFO A. I guess there are two choices left:

- either you press A/B to switch to your CQ VFO.
- or you try to mimick RIT of VFO B via FBxxx; commands with the help 
of an external control knob.

Maybe this feature can be added more easily to the K-POD?
73
Gernot
DF5RF


Am 13.01.2019 um 18:14 schrieb K9MA:
I've found that during some contest operation, it's handy to call CQ 
on VFO B, while using VFO A to search and pounce. (Known as Single 
Operator 2 VFO mode, SO2V.) That way, when unassisted, I can use the 
P3 to locate promising signals. However, I sometimes wish the RIT 
would work with the sub-receiver on VFO B. Has anyone found a way to 
do this? Even better would be to have RIT on VFO B and XIT on VFO A.


If it's not currently possible, I'd add it to my firmware wish list.

73,

Scott K9MA


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--
Scott  K9MA

k...@sdellington.us

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Re: [Elecraft] K3 Sub-receiver RIT

[gt-i]

Scott,
I looked at the programmer ref manual and realized there is only one 
RIT/XIT, which is controlling VFO A. I guess there are two choices left:

- either you press A/B to switch to your CQ VFO.
- or you try to mimick RIT of VFO B via FBxxx; commands with the help of 
an external control knob.

Maybe this feature can be added more easily to the K-POD?
73
Gernot
DF5RF


Am 13.01.2019 um 18:14 schrieb K9MA:
I've found that during some contest operation, it's handy to call CQ 
on VFO B, while using VFO A to search and pounce. (Known as Single 
Operator 2 VFO mode, SO2V.) That way, when unassisted, I can use the 
P3 to locate promising signals. However, I sometimes wish the RIT 
would work with the sub-receiver on VFO B. Has anyone found a way to 
do this? Even better would be to have RIT on VFO B and XIT on VFO A.


If it's not currently possible, I'd add it to my firmware wish list.

73,

Scott K9MA


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Re: [Elecraft] SWR on 40M band

[Dragan 4O4A]

Hi Don, 
Thanks for prompt reply.

No KAT3 installed.
I'm aware that it is not a big deal, it's just annoying.
However, I would like to understand what caused it and how to fix it - if it
is a simple solution. 




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Re: [Elecraft] SWR on 40M band

[Don Wilhelm]

Dragan,

Can I assume that you first tuned the KAT3 to the dummy load on 40 meters?

If you did not, then the L/C combination for the last antenna TUNE you 
did are still present, and will show an SWR with a dummy load.


Actually 1.3:1 is quite a workable load on any band.  The SWR does not 
have to be 1:1.  In fact there is a low SWR point where the ATU will not 
attempt to tune.


See the K3 manual page 22 and the CONFIG:KAT3 menu (K3 manual page 56). 
If you have the K3S, the manual pages may b a bit different.


73,
Don W3FPR

On 1/14/2019 7:24 PM, Dragan 4O4A wrote:

Hello all,

Well, I cannot say that it is a high SWR, but when I connect my K3 to dummy
load it shows 1.3:1 SWR on 40M. All other bands 160-10 are OK, 1:1. Other
rigs shows 1:1 on 40M.

Where to start to fix this?

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Re: [Elecraft] [Elecraft-K3] K3S Comparison table finalized (link attached)

[Dale Boresz]

Try: < http://ftp.elecraft.com/K3S/K3S_comparison1.pdf >

73,

Dale - WA8SRA

On Mon, Jan 14, 2019 at 7:14 PM Robert G Strickland 
wrote:

> I can' get this, latest link to work either.
> ...robert
>
> On 1/14/2019 04:11, John Hiatt wrote:
> > It appears to be linked from the K3S Transceiver Product page, on the
> Manuals tab toward the bottom of the page, but here is the current link:
> ftp://ftp.elecraft.com/K3S/K3S_comparison1.pdf
> >
> > John, KC7DRI
> >
> >
> > 
> > From: elecraft-boun...@mailman.qth.net 
> on behalf of Bob Wilson, N6TV 
> > Sent: Sunday, January 13, 2019 6:45 PM
> > To: Elecraft Reflector
> > Subject: Re: [Elecraft] [Elecraft-K3] K3S Comparison table finalized
> (link attached)
> >
> > The link below no longer works.  Where is this document now?
> >
> > 73,
> > Bob, N6TV
> >
> > On Sat, Jul 7, 2018 at 9:05 AM N6KR  wrote:
> >
> >> Our detailed, two-page comparison table between the K3S and IC-7610 is
> now
> >> complete:
> >>
> >>  http://www.elecraft.com/K3/K3S_comparison1.pdf
> >>
> >> I�d like to thank everyone who reviewed the table for content and
> >> accuracy, including several who own or have used both radios. Many of
> your
> >> suggestions were incorporated. As a result, the table now captures those
> >> aspects of the performance, portability, and user interface of the K3S
> that
> >> are most important to current and prospective owners.
> >>
> >> The table is an excellent starting point. If you still have unanswered
> >> questions about K3S features, theory of operation, etc., feel free to
> email
> >> me directly. (In fact, if you�re within driving distance of my QTH in
> >> Belmont, CA, stop by for a demo :)
> >>
> >> 73,
> >> Wayne
> >> N6KR
> >>
> > __
> > Elecraft mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:Elecraft@mailman.qth.net
> >
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> > Message delivered to hid...@hotmail.com
> > __
> > Elecraft mailing list
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> > Message delivered to rc...@verizon.net
> >
>
> --
> Robert G Strickland, PhD ABPH - KE2WY
> rc...@verizon.net.usa
> Syracuse, New York, USA
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[Elecraft] SWR on 40M band

[Dragan 4O4A]

Hello all,

Well, I cannot say that it is a high SWR, but when I connect my K3 to dummy
load it shows 1.3:1 SWR on 40M. All other bands 160-10 are OK, 1:1. Other
rigs shows 1:1 on 40M.

Where to start to fix this?

Regards,
Dragan, 4O4A



--
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Re: [Elecraft] 500Hz Filter Offset Question

[Mark Musick]

INRAD has 500Hz 8 pole filters for the K3/K3S. 
I have one in the main receiver and one in the sub-receiver.

Mark, WB9CIF

-Original Message-
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of Rich
Sent: Monday, January 14, 2019 23:56
To: donw...@embarqmail.com; Elecraft 
Subject: Re: [Elecraft] 500Hz Filter Offset Question

Thanks all.  I did read the manual, but it would help if I had read the entire 
paragraph and not just one sentence.

In this case they sent me all matching offsets, so they are all the same.

I was surprised that they do not have 500hz 8 pole.

Oh well, back to putting the radio back together

Ric

On 1/14/2019 18:42 PM, Don Wilhelm wrote:
> Rich,
>
> Wrong - you must enter the offset frequency.
> Related - what is true is that you do not need matched filters in the 
> main and the subRX for Diversity reception with the new synthesizers.
>
> There are plots on the Elecraft website showing the filter response. I 
> don't recall if the 500 Hz filters are included.
>
> 73,
> Don W3FPR
>
> On 1/14/2019 5:30 PM, Rich wrote:
>>
>> So now that I have 5 pole filters, I seem to recall that entering the 
>> offset freq is not required any longer on the K3S, is that true?
>>
>> Also does a K3 upgraded with K3S features need the offset freq?
>>
>> I should mention that they are all matched.
>>
>
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Re: [Elecraft] [Elecraft-K3] K3S Comparison table finalized (link attached)

[Robert G Strickland]

I can' get this, latest link to work either.
...robert

On 1/14/2019 04:11, John Hiatt wrote:

It appears to be linked from the K3S Transceiver Product page, on the Manuals 
tab toward the bottom of the page, but here is the current link:  
ftp://ftp.elecraft.com/K3S/K3S_comparison1.pdf

John, KC7DRI



From: elecraft-boun...@mailman.qth.net  on behalf 
of Bob Wilson, N6TV 
Sent: Sunday, January 13, 2019 6:45 PM
To: Elecraft Reflector
Subject: Re: [Elecraft] [Elecraft-K3] K3S Comparison table finalized (link 
attached)

The link below no longer works.  Where is this document now?

73,
Bob, N6TV

On Sat, Jul 7, 2018 at 9:05 AM N6KR  wrote:


Our detailed, two-page comparison table between the K3S and IC-7610 is now
complete:

 http://www.elecraft.com/K3/K3S_comparison1.pdf

I�d like to thank everyone who reviewed the table for content and
accuracy, including several who own or have used both radios. Many of your
suggestions were incorporated. As a result, the table now captures those
aspects of the performance, portability, and user interface of the K3S that
are most important to current and prospective owners.

The table is an excellent starting point. If you still have unanswered
questions about K3S features, theory of operation, etc., feel free to email
me directly. (In fact, if you�re within driving distance of my QTH in
Belmont, CA, stop by for a demo :)

73,
Wayne
N6KR


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--
Robert G Strickland, PhD ABPH - KE2WY
rc...@verizon.net.usa
Syracuse, New York, USA
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Re: [Elecraft] Battery Low K3

[Howard Saxion via Elecraft]

Page 48 in the K3 manual-Real Time Clock Battery Replacement.  It is a CR2032, 
BR2032, or equivalent.  Maybe it is time to check the one in my K3.
K3

Howard/WX7HS


> On Jan 14, 2019, at 3:59 PM, Bob W7AVK  wrote:
> 
> What is the battery number for the B/B in the K3?
>  Mine needs replacing and don't want to take apart the K3 twice.
> 
> Tnx
> 
> 73  Bob  W7AVK
> 
> 
> 
> On 1/14/2019 2:10 PM, David Ferrington, M0XDF wrote:
>> I’ve seen a number of B/Bs leak (not in the K3), at least once corroding the 
>> terminals.
>> 
>> 73 de David, M0XDF (K3 #174, P3 #108)
> 
> 
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Re: [Elecraft] Battery Low K3

[Bob W7AVK]

What is the battery number for the B/B in the K3?
 Mine needs replacing and don't want to take apart the K3 twice.

Tnx

73  Bob  W7AVK



On 1/14/2019 2:10 PM, David Ferrington, M0XDF wrote:

I’ve seen a number of B/Bs leak (not in the K3), at least once corroding the 
terminals.

73 de David, M0XDF (K3 #174, P3 #108)



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Re: [Elecraft] 500Hz Filter Offset Question

[Rich]

Thanks all.  I did read the manual, but it would help if I had read the 
entire paragraph and not just one sentence.


In this case they sent me all matching offsets, so they are all the same.

I was surprised that they do not have 500hz 8 pole.

Oh well, back to putting the radio back together

Ric

On 1/14/2019 18:42 PM, Don Wilhelm wrote:

Rich,

Wrong - you must enter the offset frequency.
Related - what is true is that you do not need matched filters in the 
main and the subRX for Diversity reception with the new synthesizers.


There are plots on the Elecraft website showing the filter response.  
I don't recall if the 500 Hz filters are included.


73,
Don W3FPR

On 1/14/2019 5:30 PM, Rich wrote:


So now that I have 5 pole filters, I seem to recall that entering the 
offset freq is not required any longer on the K3S, is that true?


Also does a K3 upgraded with K3S features need the offset freq?

I should mention that they are all matched.




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Re: [Elecraft] 500Hz Filter Offset Question

[Don Wilhelm]

Rich,

Wrong - you must enter the offset frequency.
Related - what is true is that you do not need matched filters in the 
main and the subRX for Diversity reception with the new synthesizers.


There are plots on the Elecraft website showing the filter response.  I 
don't recall if the 500 Hz filters are included.


73,
Don W3FPR

On 1/14/2019 5:30 PM, Rich wrote:


So now that I have 5 pole filters, I seem to recall that entering the 
offset freq is not required any longer on the K3S, is that true?


Also does a K3 upgraded with K3S features need the offset freq?

I should mention that they are all matched.


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Re: [Elecraft] 500Hz Filter Offset Question

[Jack Brindle via Elecraft]

This has to do with the synthesizer boards. I believe the answer is that you 
don’t need to match them with the new synthesizers. You may need to still enter 
the offsets, however.

73!
Jack, W6FB


> On Jan 14, 2019, at 2:30 PM, Rich  wrote:
> 
> I just received my 500hz filters from Elecraft.   I guess I assumed they were 
> 8 pole, however they are 5 pole.  The web page does not specify 5 or 8 pole, 
> or I did not navigate the webpage properly.
> 
> So now that I have 5 pole filters, I seem to recall that entering the offset 
> freq is not required any longer on the K3S, is that true?
> 
> Also does a K3 upgraded with K3S features need the offset freq?
> 
> I should mention that they are all matched.
> 
> Is there a graphic representation of these 5 pole filters available?
> 
> Thanks
> 
> Rich
> 
> K3RWN
> 
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Re: [Elecraft] New DSP features?

[Bill Johnson]

I meant without RIT on.  

73,
Bill
K9YEQ

https://wrj-tech.com/

-Original Message-
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of Bill Johnson
Sent: Monday, January 14, 2019 5:24 PM
To: Kenneth Christiansen ; Wayne Burdick 
Cc: Elecraft Reflector ; k...@yahoogroups.com
Subject: Re: [Elecraft] New DSP features?

I use spot on KX3 without spot on.  Am I missing something?

73,
Bill
K9YEQ

https://wrj-tech.com/

-Original Message-
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of Kenneth Christiansen
Sent: Sunday, January 13, 2019 7:15 PM
To: Wayne Burdick 
Cc: Elecraft Reflector ; k...@yahoogroups.com
Subject: Re: [Elecraft] New DSP features?

H Wayne

I like the way the KX3 will let me use the automatic spot on the receiver only 
when the RIT is on. I have always wished the K3 and K3S would do the same thing 
as the automatic spot works so well but I do not want to move the transmitter 
at the same time with the RIT on. 

That is the only thing I can think of as I love my K3S.
73
Ken W0CZ
w...@i29.net


Sent from my iPad

> On Jan 10, 2019, at 9:20 PM, Wayne Burdick  wrote:
> 
> Hi all,
> 
> The K3/K3S and KX2/KX3 are SDRs, by definition, because they provide 
> demodulation and modulation features via a DSP chip that is programmable.
> 
> Our DSP algorithms already give the user all the usual features expected of 
> an all-mode transceiver, and then some:
> 
>  - DVR
>  - variable passband filtering & IF shift
>  - audio peaking filter (APF, for CW)
>  - auto-spotting and automatic tuning (CW, PSK)
>  - dual watch (KX2/KX3)
>  - audio effects
>  - DTMF (KX3)
>  - dual-passband filtering for RTTY
>  - FM subaudible tones
>  - data decode/encode in various modes
>  - noise reduction
>  - RX and TX EQ
>  - synchronous AM (K3/K3S)
>  - ESSB
>  - transmit noise gating
>  - speech compression
>  - manual notch filtering
>  - autonotch
> 
> ...etc.
> 
> That said, here's your chance to dream up *new* DSP features we haven't 
> thought of. All suggestions will be debated by our engineering team, even 
> those that appear radical or implausible at first glance. 
> 
> We'll keep this to ourselves, so don't worry about being judged for tossing 
> out some wacky ideas. Let's cast a broad net.
> 
> Please send all correspondence on this topic directly to yours truly.
> 
> 73,
> Wayne
> N6KR
> 
> 
> 
> __
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Re: [Elecraft] 500Hz Filter Offset Question

[K9MA]

It looks to me like you still have to set the offsets. See manual. It 
doesn't appear there is any difference between the K3 and K3s as far as 
filter offsets.


When I set up my K3, I tried to get the 200 Hz filter offset "just 
right", so the noise would sound exactly the same in USB or LSB (CW or 
CW REV). I found that the filter drifted around quite a bit with 
temperature. So, if you have the narrow filters, let the temperature 
stabilize before setting the offset. Wider filters are much less critical.


73,
Scott K9MA




On 1/14/2019 17:13, Nr4c wrote:

Well they used to be difrentisted from the 8 pole filters haven’t looked for 
them on new site.

Eight pole filters have a metal can enclosing them. The five pole filters are 
just exposed PC boards.

I think I have offsets set on my K3S for the 200 Hz filters.

Sent from my iPhone
...nr4c. bill



On Jan 14, 2019, at 5:30 PM, Rich  wrote:

I just received my 500hz filters from Elecraft.   I guess I assumed they were 8 
pole, however they are 5 pole.  The web page does not specify 5 or 8 pole, or I 
did not navigate the webpage properly.

So now that I have 5 pole filters, I seem to recall that entering the offset 
freq is not required any longer on the K3S, is that true?

Also does a K3 upgraded with K3S features need the offset freq?

I should mention that they are all matched.

Is there a graphic representation of these 5 pole filters available?

Thanks

Rich

K3RWN





--
Scott  K9MA

k...@sdellington.us

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Re: [Elecraft] New DSP features?

[Bill Johnson]

I use spot on KX3 without spot on.  Am I missing something?

73,
Bill
K9YEQ

https://wrj-tech.com/

-Original Message-
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of Kenneth Christiansen
Sent: Sunday, January 13, 2019 7:15 PM
To: Wayne Burdick 
Cc: Elecraft Reflector ; k...@yahoogroups.com
Subject: Re: [Elecraft] New DSP features?

H Wayne

I like the way the KX3 will let me use the automatic spot on the receiver only 
when the RIT is on. I have always wished the K3 and K3S would do the same thing 
as the automatic spot works so well but I do not want to move the transmitter 
at the same time with the RIT on. 

That is the only thing I can think of as I love my K3S.
73
Ken W0CZ
w...@i29.net


Sent from my iPad

> On Jan 10, 2019, at 9:20 PM, Wayne Burdick  wrote:
> 
> Hi all,
> 
> The K3/K3S and KX2/KX3 are SDRs, by definition, because they provide 
> demodulation and modulation features via a DSP chip that is programmable.
> 
> Our DSP algorithms already give the user all the usual features expected of 
> an all-mode transceiver, and then some:
> 
>  - DVR
>  - variable passband filtering & IF shift
>  - audio peaking filter (APF, for CW)
>  - auto-spotting and automatic tuning (CW, PSK)
>  - dual watch (KX2/KX3)
>  - audio effects
>  - DTMF (KX3)
>  - dual-passband filtering for RTTY
>  - FM subaudible tones
>  - data decode/encode in various modes
>  - noise reduction
>  - RX and TX EQ
>  - synchronous AM (K3/K3S)
>  - ESSB
>  - transmit noise gating
>  - speech compression
>  - manual notch filtering
>  - autonotch
> 
> ...etc.
> 
> That said, here's your chance to dream up *new* DSP features we haven't 
> thought of. All suggestions will be debated by our engineering team, even 
> those that appear radical or implausible at first glance. 
> 
> We'll keep this to ourselves, so don't worry about being judged for tossing 
> out some wacky ideas. Let's cast a broad net.
> 
> Please send all correspondence on this topic directly to yours truly.
> 
> 73,
> Wayne
> N6KR
> 
> 
> 
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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> 

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Re: [Elecraft] Testing

[Wes Stewart]

Many thanks to all who replied.  My ISP had set spam filtering to "extreme" and 
was blocking all of my list servers.  All of the messages were still there in 
quarantine on my webmail server which I never use.  My normal client is 
Thunderbird which is clueless in this case.


Supposedly they've fixed it.

Wes  N7WS

On 1/14/2019 3:22 PM, Jim Finan wrote:

Saw it!

No answers...

Jim Finan
AB4AC

S


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Re: [Elecraft] 500Hz Filter Offset Question

[Nr4c]

Well they used to be difrentisted from the 8 pole filters haven’t looked for 
them on new site. 

Eight pole filters have a metal can enclosing them. The five pole filters are 
just exposed PC boards. 

I think I have offsets set on my K3S for the 200 Hz filters. 

Sent from my iPhone
...nr4c. bill


> On Jan 14, 2019, at 5:30 PM, Rich  wrote:
> 
> I just received my 500hz filters from Elecraft.   I guess I assumed they were 
> 8 pole, however they are 5 pole.  The web page does not specify 5 or 8 pole, 
> or I did not navigate the webpage properly.
> 
> So now that I have 5 pole filters, I seem to recall that entering the offset 
> freq is not required any longer on the K3S, is that true?
> 
> Also does a K3 upgraded with K3S features need the offset freq?
> 
> I should mention that they are all matched.
> 
> Is there a graphic representation of these 5 pole filters available?
> 
> Thanks
> 
> Rich
> 
> K3RWN
> 
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Re: [Elecraft] WHAT IS AN UPDATED K3 CALLED.

[Nr4c]

How about a “K3”? 

That’s what it is. My K3 was a K3 when I bought it with 10 watts and no ATU.   
It was still a K3 when I had the KDVR, the sub-receiver and 5 filters plus the 
BCB mod and a P3. 

Sent from my iPhone
...nr4c. bill


> On Jan 14, 2019, at 6:01 PM, JOHN POWELL  wrote:
> 
> 
> 
>How about K3X (XTRA) ?.
> 
>Just had my K3, SN 1621, updated at Watsonville HQ with 2 Synths
> (have Sub Rx)., plus installation of  following upgrades -DSP Upgrade
> (K3DSPUPGD-F Mod.), Rx Ant, IF Out, Preamp, Transverter Interface
> (KXV3B Mod) ,in addition a full.service. Turnaround time was just over
> 4 weeks. Haven't had the opportunity of trying out the rig due to
> Cardiac problems a few days after return the K3. I was very pleased
> with the communications from the Technical support team at Elecraft
> thru the whole process.  All occurred in mid -late December and was
> home for Xmas.
> 
>From the foregoing it maybe apparent for the rationale I
> adopted relating to  the K3X Reference.
> 
>73
> 
>John Powell. ZL1BHQ
> 
> 
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[Elecraft] WHAT IS AN UPDATED K3 CALLED.

[JOHN POWELL]

How about K3X (XTRA) ?.

Just had my K3, SN 1621, updated at Watsonville HQ with 2 Synths
(have Sub Rx)., plus installation of  following upgrades -DSP Upgrade
(K3DSPUPGD-F Mod.), Rx Ant, IF Out, Preamp, Transverter Interface
(KXV3B Mod) ,in addition a full.service. Turnaround time was just over
4 weeks. Haven't had the opportunity of trying out the rig due to
Cardiac problems a few days after return the K3. I was very pleased
with the communications from the Technical support team at Elecraft
thru the whole process.  All occurred in mid -late December and was
home for Xmas.

From the foregoing it maybe apparent for the rationale I
adopted relating to  the K3X Reference.

73

John Powell. ZL1BHQ


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[Elecraft] 500Hz Filter Offset Question

[Rich]

I just received my 500hz filters from Elecraft.   I guess I assumed they 
were 8 pole, however they are 5 pole.  The web page does not specify 5 
or 8 pole, or I did not navigate the webpage properly.


So now that I have 5 pole filters, I seem to recall that entering the 
offset freq is not required any longer on the K3S, is that true?


Also does a K3 upgraded with K3S features need the offset freq?

I should mention that they are all matched.

Is there a graphic representation of these 5 pole filters available?

Thanks

Rich

K3RWN

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Re: [Elecraft] Testing

[Jim Finan]

Saw it!

No answers...

Jim Finan 
AB4AC

Sent from my BlackBerry - the most secure mobile device

  Original Message  
From: wes_n...@triconet.org
Sent: January 14, 2019 5:06 PM
To: Elecraft@mailman.qth.net
Subject: [Elecraft] Testing

I've been having a problem were my posts are either not making it to the 
reflector or are not coming back to me as a copy, even though they always have 
and that is my preference in settings.

Will someone let me know if they see this post.  One person will be plenty.

Thanks Wes  N7WS

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Re: [Elecraft] Battery Low K3

[Michael Blake via Elecraft]

I have seen two.  My Kenwood TS-850 and TS-50 both had leaky button cells.

73 - Mike - K9JRI
 





> On Jan 14, 2019, at 5:05 PM, Bill Frantz  wrote:
> 
> I got a private message asking me how often I had seen button batteries 
> leaking. I seem to remember only once, and no damage to the equipment it was 
> in. Leaking button batteries may be a non-issue.
> 
> 73 Bill AE6JV
> 
> On 1/14/19 at 10:03 AM, indi...@xsmail.com (Petr, OK1RP/M0SIS) wrote:
> 
>> Ups, Bill you scarred me with leaking the cell inside of my K3...:)
>> OK, OK, OK, I will check it tonite...
> 
> ---
> Bill Frantz| Truth and love must prevail  | Periwinkle
> (408)356-8506  | over lies and hate.  | 16345 Englewood Ave
> www.pwpconsult.com |   - Vaclav Havel | Los Gatos, CA 95032
> 
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Re: [Elecraft] Battery Low K3

[David Ferrington, M0XDF]

I’ve seen a number of B/Bs leak (not in the K3), at least once corroding the 
terminals.

73 de David, M0XDF (K3 #174, P3 #108)
-- 
If a man will begin with certainties, he shall end in doubts; but if he
will be content to begin with doubts, he shall end in certainties.
-Francis Bacon, essayist, philosopher, and statesman (1561-1626)

> On 14 Jan 2019, at 22:05, Bill Frantz  wrote:
> 
> I got a private message asking me how often I had seen button batteries 
> leaking. I seem to remember only once, and no damage to the equipment it was 
> in. Leaking button batteries may be a non-issue.
> 
> 73 Bill AE6JV
> 
> On 1/14/19 at 10:03 AM, indi...@xsmail.com (Petr, OK1RP/M0SIS) wrote:
> 
>> Ups, Bill you scarred me with leaking the cell inside of my K3...:)
>> OK, OK, OK, I will check it tonite...

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Re: [Elecraft] Battery Low K3

[Bill Frantz]

I got a private message asking me how often I had seen button 
batteries leaking. I seem to remember only once, and no damage 
to the equipment it was in. Leaking button batteries may be a non-issue.


73 Bill AE6JV

On 1/14/19 at 10:03 AM, indi...@xsmail.com (Petr, OK1RP/M0SIS) wrote:


Ups, Bill you scarred me with leaking the cell inside of my K3...:)
OK, OK, OK, I will check it tonite...


---
Bill Frantz| Truth and love must prevail  | Periwinkle
(408)356-8506  | over lies and hate.  | 16345 
Englewood Ave
www.pwpconsult.com |   - Vaclav Havel | Los Gatos, 
CA 95032


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[Elecraft] Testing

[Wes Stewart]

I've been having a problem were my posts are either not making it to the 
reflector or are not coming back to me as a copy, even though they always have 
and that is my preference in settings.


Will someone let me know if they see this post.  One person will be plenty.

Thanks Wes  N7WS

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Re: [Elecraft] Battery Low K3

[hawley, charles j jr]

Some have said that the coin cells don't leak...maybe not often but I know of 
one that leaked in a Kenwood 850 and ate away some of the circuit board traces. 
So regular maintenance is in order for any battery.


Chuck Hawley
Amateur Radio, KE9UW

From: elecraft-boun...@mailman.qth.net  on 
behalf of Petr, OK1RP/M0SIS 
Sent: Monday, January 14, 2019 12:03:45 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Battery Low K3

Ups, Bill you scarred me with leaking the cell inside of my K3...:)
OK, OK, OK, I will check it tonite...





-
73 - Petr, OK1RP
"Apple & Elecraft freak"
B:http://ok1rp.blogspot.com
G+:http://goo.gl/w3u2s9
G+: http://goo.gl/gP99xq
--
Sent from: http://elecraft.365791.n2.nabble.com/
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Re: [Elecraft] Slightly Unbalanced dipole?

[Barry]

Jim,
Your comment about hams not being limited, " Huh? We're hams -- 
we're not limited to products we can buy! And we can build far better 
than we can buy.". you may be correct, but from what I see, the majority 
of hams, at least around here, buy what they need. Even of our more 
serious hams buy baluns and chokes from sources like DX Engineering and 
Balun Designs; few are really building these easy to make devices. There 
are exceptions to what I just said, but in the main, more hams are 
buying rather than building. Sorry, but that's what it looks like to me.


I do like your paper and have it. I also wish that you continue to 
get more hams to actually build more things.


73,
Barry
K3NDM

-- Original Message --
From: "Jim Brown" 
To: elecraft@mailman.qth.net
Sent: 1/14/2019 2:21:30 PM
Subject: Re: [Elecraft] Slightly Unbalanced dipole?


On 1/14/2019 9:02 AM, Barry wrote:

The simple answer is that the common mode chokes available to hams are of the 
unbalanced type.


Huh? We're hams -- we're not limited to products we can buy! And we can build 
far better than we can buy. In 2010, I published the design for a common mode 
choke to cover the HF bands using a pair of #12 THHN wound on a 2.4-in o.d. #31 
toroid.  k9yc.com/2018Cookbook.pdf has dozens of designs using THHN, teflon 
pairs, and RG400. These chokes are fairly easy to wind, and all can be built 
for less than about $35, including connectors.

A member of our contest club is building a serious contest station, and asked me to 
measure a "balun" from a well-known manufacturer. It came in a nice 
weatherproof non-metallic enclosure, and was nicely made. But it looked NOTHING like the 
data sheet that WAS on the website at the time (and which has been removed since I showed 
my data to a few engineering colleagues, one of whom obviously asked the mfr about it.)

The problem with choking a two-wire feedline is NOT one of balance -- if it's a good 
choke, the choke takes "balance" out of the equation. What matters is 
dissipation in the choke due to excessive voltage or current that is present because the 
antenna is not matched to the line.

73, Jim K9YC

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Re: [Elecraft] New DSP Idea

[Don Wilhelm]

Bill,

Certainly not - any firmware changes to the K3S are applicable to the K3 
as well.  But the K3 is now 10 years old, and there is now not much new 
engineering effort going on to make improvements.  If problems develop, 
they will certainly be addresses - perhaps even with top priority 
depending on how serious.  Even the 20 year old K2 still has a lot of 
attention at Elecraft and is still being actively sold.
Even the discontinued products are being fully addressed by Elecraft 
support.


Yes, I am certain there is considerable effort on some new product 
(there always is), and K3 improvements have simply been moved to a lower 
priority.


73,
Don W3FPR

On 1/14/2019 2:49 PM, bill wrote:


Is the K3 now a developmental orphan?


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Re: [Elecraft] New DSP Idea

[bill]

On 1/14/19 at 5:19 AM, jstengrev...@comcast.net (John Stengrevics) wrote:

   Given the increased noise levels most hams face, I emailed Wayne to
   ask if improved noise reduction & noise blanking were on their
   project list. He said no.  So, any improvements are apparently a
   long way off. 

WOW - that is indeed disappointing. Guess that pretty much negates this 
thread. There were some good ideas put forth - and much of it software 
(updatable??).


Is the K3 now a developmental orphan?

Bill W2BLC


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Re: [Elecraft] Slightly Unbalanced dipole?

[Victor Rosenthal 4X6GP]

I agree. And I maintain that the problem is exactly the same with the 
common solution of a single-ended tuner feeding a balanced line through 
a balun. If there is a big mismatch the choke will get hot.


73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
CWops no. 5
http://www.qsl.net/k2vco/
On 14 Jan 2019 21:21, Jim Brown wrote:

The problem with choking a two-wire feedline is NOT one of balance -- if 
it's a good choke, the choke takes "balance" out of the equation. What 
matters is dissipation in the choke due to excessive voltage or current 
that is present because the antenna is not matched to the line.

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Re: [Elecraft] Slightly Unbalanced dipole?

[Jim Brown]

On 1/14/2019 9:02 AM, Barry wrote:
The simple answer is that the common mode chokes available to hams are 
of the unbalanced type.


Huh? We're hams -- we're not limited to products we can buy! And we can 
build far better than we can buy. In 2010, I published the design for a 
common mode choke to cover the HF bands using a pair of #12 THHN wound 
on a 2.4-in o.d. #31 toroid.  k9yc.com/2018Cookbook.pdf has dozens of 
designs using THHN, teflon pairs, and RG400. These chokes are fairly 
easy to wind, and all can be built for less than about $35, including 
connectors.


A member of our contest club is building a serious contest station, and 
asked me to measure a "balun" from a well-known manufacturer. It came in 
a nice weatherproof non-metallic enclosure, and was nicely made. But it 
looked NOTHING like the data sheet that WAS on the website at the time 
(and which has been removed since I showed my data to a few engineering 
colleagues, one of whom obviously asked the mfr about it.)


The problem with choking a two-wire feedline is NOT one of balance -- if 
it's a good choke, the choke takes "balance" out of the equation. What 
matters is dissipation in the choke due to excessive voltage or current 
that is present because the antenna is not matched to the line.


73, Jim K9YC

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Re: [Elecraft] K2 upgrades?

[Don Wilhelm]

Johnny,

Since any builder can upgrade a K2 by installing the A to B Mod plus any 
other associated mod kits, you will have to determine the level by 
inspection.
Download the K2ATOB instructions and look at all the associated upgrade 
kits listed on the first page - then download the instructions for each 
of those upgrade kits.


Remove the top and bottom covers from your K2 and compare your physical 
board with the instructions for each upgrade kit.
Often owners have installed one or two upgrade kits from the full A to B 
upgrade, but have not done others.


A fully upgraded K2 can perform just like a newly built kit.  That fact 
makes it difficult to predict what upgrades are still needed other than 
inspection of the parts installed.


73,
Don W3FPR

On 1/14/2019 1:43 PM, Johnny Matlock wrote:

I bought a older K2 today.
Serial number below 1000.

Which upgrades are recommended by the group?

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[Elecraft] K2 upgrades?

[Johnny Matlock]

I bought a older K2 today.
Serial number below 1000.

Which upgrades are recommended by the group?

Thanks
73
Johnny AC0BQ
-- 
Check out the 4SQRP website at 4sqrp.com
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Re: [Elecraft] Battery Low K3

[Petr, OK1RP/M0SIS]

Ups, Bill you scarred me with leaking the cell inside of my K3...:)
OK, OK, OK, I will check it tonite...





-
73 - Petr, OK1RP 
"Apple & Elecraft freak" 
B:http://ok1rp.blogspot.com
G+:http://goo.gl/w3u2s9
G+: http://goo.gl/gP99xq
--
Sent from: http://elecraft.365791.n2.nabble.com/
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Re: [Elecraft] New DSP Idea

[Drew AF2Z]

Yes, perhaps the RIT knob could be employed to step the NR selection 
between F1, F2, F3, etc. The RIT control is not used for anything while 
the NR display is engaged.


73,
Drew
AF2Z


On 01/14/19 12:42, Bill Frantz wrote:
The NR change I would like is "just" a UI change. If I could temporarily 
set up two knobs to change the two parameters it would be a lot easier 
to play with the settings and find the best combo. Having one knob means 
having to remember how well a setting several twists away works; much 
harder.


73 Bill AE6JV

On 1/14/19 at 5:19 AM, jstengrev...@comcast.net (John Stengrevics) wrote:

Given the increased noise levels most hams face, I emailed Wayne to 
ask if improved noise reduction & noise blanking were on their project 
list.  He said no.  So, any improvements are apparently a long way off.

---
Bill Frantz    | Ham radio contesting is a    | Periwinkle
(408)356-8506  | contact sport.   | 16345 Englewood Ave
www.pwpconsult.com |  - Ken Widelitz K6LA / VY2TT | Los Gatos, CA 95032

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Re: [Elecraft] New DSP Idea

[Bill Frantz]

The NR change I would like is "just" a UI change. If I could 
temporarily set up two knobs to change the two parameters it 
would be a lot easier to play with the settings and find the 
best combo. Having one knob means having to remember how well a 
setting several twists away works; much harder.


73 Bill AE6JV

On 1/14/19 at 5:19 AM, jstengrev...@comcast.net (John 
Stengrevics) wrote:


Given the increased noise levels most hams face, I emailed 
Wayne to ask if improved noise reduction & noise blanking were 
on their project list.  He said no.  So, any improvements are 
apparently a long way off.

---
Bill Frantz| Ham radio contesting is a| Periwinkle
(408)356-8506  | contact sport.   | 16345 
Englewood Ave
www.pwpconsult.com |  - Ken Widelitz K6LA / VY2TT | Los Gatos, 
CA 95032


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Re: [Elecraft] Battery Low K3

[Bill Frantz]

I don't use the RTC for much, so I let it get way off NIST time. 
What I most worry about is the battery running down and leaking 
inside the K3. I suppose on the rare times I run the utility, I 
should check to see if the clock is still running. If it runs 
out of juice, the replace the battery.


73 Bill AE6JV

On 1/14/19 at 12:54 AM, indi...@xsmail.com (Petr, OK1RP/M0SIS) wrote:


finally it means that RTC lithium cell low voltage status is not alerted at
all, right?
So I should check it or better replace it after 11yrs, right? :)


---
Bill Frantz| I don't have high-speed  | Periwinkle
(408)356-8506  | internet. I have DSL.| 16345 
Englewood Ave
www.pwpconsult.com |  | Los Gatos, 
CA 95032


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Re: [Elecraft] Slightly Unbalanced dipole?

[Gwen Patton]

I got this unbalanced common-mode choke from Amateur Radio Supplies. It
completely clobbered all of the "bite" I was getting in the shack, and is
keeping stray RF out of my bench computer. I got it when I was having
trouble with the keyboard I had connected to my PX3 -- when I transmitted
CW or PSK31, the RF would cause random characters to get stuffed into the
keyboard buffer, and the transmission wouldn't stop until I stopped it
manually. It helped, but the way I finally got around it was by using a
2.5ghz non-Bluetooth wireless keyboard for the PX3. Any wired keyboard I
used would result in garbage in the transmission as the RF induced current
in the keyboard cable.

https://www.amateurradiosupplies.com/product-p/iso-max.htm

73,
Gwen, NG3P

On Mon, Jan 14, 2019 at 12:03 PM Barry  wrote:

> Vic,
>  The simple answer is that the common mode chokes available to hams
> are of the unbalanced type. That means they are designed to be
> unbalanced in to unbalanced out. Some companies make baluns that are
> both current baluns that act for choking common mode currents and
> transform a balanced load to an unbalanced load. If you place a common
> mode choke at the antenna feed point, the system will be unbalanced,
> usually.
>
>  Next, most tuners that have built in baluns use voltage type baluns
> and can be less than good in a high SWR situation. However, using a good
> current balun at or neat the tuner usually prevents common mode issues.
> However nothing is 100% when dealing with RF.
>
>  Putting reactance in the line to counter what is already there is
> good when dealing with the impedance, but you are correct about
> complexity. The very simplest configuration that I know in a multiband
> situation is to erect a dipole for the lowest frequency to be used and
> feeding it with ladder line, or equal. Where you enter the house mount a
> 4:1 current balun and connect coax from there to the tuner. As long as
> your tuner can handle the SWR and the coax run is short, you need not
> worry about losses due to SWR; I am speaking to the 1 or so db losses
> over just the transmission line loss. If you use the tuner in your
> Elecraft gear, I just wouldn't worry, period. Elecraft tuners appear to
> be able to handle anything I've put in my backyard so far.
>
>  The Johnson matchbox line of tuners were excellent. I no longer have
> mine; selling mine was a less than brilliant move on my part, in
> retrospect. However, I don't usually recommend this approach. Getting
> through some of the walls/windows in the houses around here with
> balanced line can be problematic. So, I usually recommend the approach
> above for overall simplicity and assurance of maintaining feed balance.
>
> 73,
> Barry
> K3NDM
>
> -- Original Message --
> From: "Vic Rosenthal" 
> To: "Al Lorona" 
> Cc: elecraft@mailman.qth.net
> Sent: 1/14/2019 1:12:37 AM
> Subject: Re: [Elecraft] Slightly Unbalanced dipole?
>
> >Why would a common mode choke at the antenna feedpoint present more
> problems than the common practice of feeding a balanced line through a
> single-ended tuner and balun?
> >I’ve done a lot of experimenting with the latter and have learned that a)
> the best configuration is with a 1:1 balun, and b) the balun will become
> lossy and heat up if the impedance it sees is highly reactive. The solution
> to b) is to cancel the reactance by putting the appropriate opposite
> reactance in both sides of the line between the balun and the antenna. Of
> course this means added complexity.
> >I would love to figure out how to make a choke that would work with
> balanced line at the antenna feedpoint, on multiple bands without any
> additional components.
> >FWIW I’ve switched to a real balanced tuner (Johnson Matchbox).
> >
> >Victor 4X6GP
> >
> >>  On 14 Jan 2019, at 1:42, Al Lorona  wrote:
> >>
> >>  By the way, whenever Jim says, "...a very good common mode choke at
> the feedpoint of an antenna...," he means an antenna fed with coax. For the
> rest of us, of course, that choke would (should) go at the output of the
> antenna tuner, whether in the shack or close by.
> >>
> >>  Al  W6LX
> >>
> >>
> >>  __
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> __

Re: [Elecraft] Slightly Unbalanced dipole?

[Barry]

Vic,
The simple answer is that the common mode chokes available to hams 
are of the unbalanced type. That means they are designed to be 
unbalanced in to unbalanced out. Some companies make baluns that are 
both current baluns that act for choking common mode currents and 
transform a balanced load to an unbalanced load. If you place a common 
mode choke at the antenna feed point, the system will be unbalanced, 
usually.


Next, most tuners that have built in baluns use voltage type baluns 
and can be less than good in a high SWR situation. However, using a good 
current balun at or neat the tuner usually prevents common mode issues. 
However nothing is 100% when dealing with RF.


Putting reactance in the line to counter what is already there is 
good when dealing with the impedance, but you are correct about 
complexity. The very simplest configuration that I know in a multiband 
situation is to erect a dipole for the lowest frequency to be used and 
feeding it with ladder line, or equal. Where you enter the house mount a 
4:1 current balun and connect coax from there to the tuner. As long as 
your tuner can handle the SWR and the coax run is short, you need not 
worry about losses due to SWR; I am speaking to the 1 or so db losses 
over just the transmission line loss. If you use the tuner in your 
Elecraft gear, I just wouldn't worry, period. Elecraft tuners appear to 
be able to handle anything I've put in my backyard so far.


The Johnson matchbox line of tuners were excellent. I no longer have 
mine; selling mine was a less than brilliant move on my part, in 
retrospect. However, I don't usually recommend this approach. Getting 
through some of the walls/windows in the houses around here with 
balanced line can be problematic. So, I usually recommend the approach 
above for overall simplicity and assurance of maintaining feed balance.


73,
Barry
K3NDM

-- Original Message --
From: "Vic Rosenthal" 
To: "Al Lorona" 
Cc: elecraft@mailman.qth.net
Sent: 1/14/2019 1:12:37 AM
Subject: Re: [Elecraft] Slightly Unbalanced dipole?


Why would a common mode choke at the antenna feedpoint present more problems 
than the common practice of feeding a balanced line through a single-ended 
tuner and balun?
I’ve done a lot of experimenting with the latter and have learned that a) the 
best configuration is with a 1:1 balun, and b) the balun will become lossy and 
heat up if the impedance it sees is highly reactive. The solution to b) is to 
cancel the reactance by putting the appropriate opposite reactance in both 
sides of the line between the balun and the antenna. Of course this means added 
complexity.
I would love to figure out how to make a choke that would work with balanced 
line at the antenna feedpoint, on multiple bands without any additional 
components.
FWIW I’ve switched to a real balanced tuner (Johnson Matchbox).

Victor 4X6GP


 On 14 Jan 2019, at 1:42, Al Lorona  wrote:

 By the way, whenever Jim says, "...a very good common mode choke at the feedpoint 
of an antenna...," he means an antenna fed with coax. For the rest of us, of course, 
that choke would (should) go at the output of the antenna tuner, whether in the shack or 
close by.

 Al  W6LX


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Re: [Elecraft] Elecraft Digest, Vol 177, Issue 23

[Bob Novas]

http://k9yc.com/ChokesTLData.pdf gets a 404 not found error.  I'd be
interested in seeing the document.  Bob - W3DK

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Sent: Monday, January 14, 2019 6:52 AM
To: elecraft@mailman.qth.net
Subject: Elecraft Digest, Vol 177, Issue 23

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Re: [Elecraft] New DSP Idea

[John Stengrevics]

Given the increased noise levels most hams face, I emailed Wayne to ask if 
improved noise reduction & noise blanking were on their project list.  He said 
no.  So, any improvements are apparently a long way off.

John
WA1EAZ

> On Jan 14, 2019, at 7:29 AM, Wes Stewart  wrote:
> 
> Lyle is retired here in Tucson.
> 
> Wes  N7WS
> 
> On 1/14/2019 3:00 AM, Bill W4ZV wrote:
>> David Gilbert wrote
>>> Yes, I agree that the computation needs to be done in the frequency
>>> domain with an FFT.  I have no clue whether or not the K3 and K3s have
>>> enough computational power to do so, but Lyle (Elecraft's DSP guru)
>>> briefly discussed this idea with me when I suggested it several years
>>> ago and he seemed to think it might be feasible.  At the time the K3
>>> synths wouldn't preserve lock when you changed frequency so it wouldn't
>>> have been very practical back then, but the new synths are fed by the
>>> same oscillator now.
>> You asked a good question Dave.  I recall Lyle telling me the same years ago
>> (where is Lyle anyway...buried in K4 firmware?).  I've used the NCC-1,
>> MFJ-1025 and ANC-4 over the years to phase parallel staggered Beverages.
>> This is probably beyond the processor in the K3 but it remains a good idea
>> to investigate for the K4.  The downside to phasing two identical antennas
>> internally is that you must give up diversity.  Using the NCC-1 output for
>> one input to the K3 diversity and a different antenna for the other allows
>> both simultaneously (but for two different purposes).
>> 
>> I'm afraid the market for users who want to do this sort of thing may be
>> small, but clearly there is a decent market for noise canceling devices.
>> BTW noise canceling boxes ONLY work well for canceling a single local noise
>> source which requires a nearby sense antenna for one input (groundwave only
>> since propagation introduces constantly shifting relative phase changes).
>> 
>> 73,  Bill  W4ZV
>> 
>> P.S.  The bottom 2 plots in the link below show what can be done by phasing
>> two parallel staggered Beverages:
>> http://users.vnet.net/btippett/new_page_10.htm
> 
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Re: [Elecraft] Non-Resonant Antennas and Chokes

[Dave Cole (NK7Z)]

It is one hell of a nice read Jim, THANK YOU for publishing it.

73s and thanks,
Dave (NK7Z)
https://www.nk7z.net
Award Manager, 30MDG Grid Contest
ARRL Technical Specialist
ARRL Volunteer Examiner
ARRL OOC for Oregon

On 1/13/19 9:24 PM, Jim Brown wrote:

I'm not going to go beyond this on the reflector, but will refer 
interested readers to that tutorial, and to my latest work, a major 
update of the Choke Cookbook published in the first edition of the 
tutorial. The update is k9yc.com/2018Cookbook.pdf


73, Jim K9YC

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Re: [Elecraft] New DSP Idea

[Wes Stewart]

Lyle is retired here in Tucson.

Wes  N7WS

On 1/14/2019 3:00 AM, Bill W4ZV wrote:

David Gilbert wrote

Yes, I agree that the computation needs to be done in the frequency
domain with an FFT.  I have no clue whether or not the K3 and K3s have
enough computational power to do so, but Lyle (Elecraft's DSP guru)
briefly discussed this idea with me when I suggested it several years
ago and he seemed to think it might be feasible.  At the time the K3
synths wouldn't preserve lock when you changed frequency so it wouldn't
have been very practical back then, but the new synths are fed by the
same oscillator now.

You asked a good question Dave.  I recall Lyle telling me the same years ago
(where is Lyle anyway...buried in K4 firmware?).  I've used the NCC-1,
MFJ-1025 and ANC-4 over the years to phase parallel staggered Beverages.
This is probably beyond the processor in the K3 but it remains a good idea
to investigate for the K4.  The downside to phasing two identical antennas
internally is that you must give up diversity.  Using the NCC-1 output for
one input to the K3 diversity and a different antenna for the other allows
both simultaneously (but for two different purposes).

I'm afraid the market for users who want to do this sort of thing may be
small, but clearly there is a decent market for noise canceling devices.
BTW noise canceling boxes ONLY work well for canceling a single local noise
source which requires a nearby sense antenna for one input (groundwave only
since propagation introduces constantly shifting relative phase changes).

73,  Bill  W4ZV

P.S.  The bottom 2 plots in the link below show what can be done by phasing
two parallel staggered Beverages:
http://users.vnet.net/btippett/new_page_10.htm


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Re: [Elecraft] New DSP features?

[Martin Sole]

I find the NB in the K3 is very versatile and can usually make a difference.

I rarely use the NR, never found it much use, that goes for other rigs 
too, might just be me.


The APF was a great addition to the K3 firmware but I feel it could 
stand some enhancement, adjustable BW would be very nice and something 
to offset some of the artefacts I feel it adds as it is right now.I 
don't think it needs adjustable centre freq for use as a CW peaking 
filter as only the one freq is of interested. When the Orion added APF 
to its firmware it was variable from 300Hz down to 10Hz with adjustable 
centre frequency. Not so much for CW but a surprisingly useful SSB 
addition. Much like a sweepable EQ it can often be just the thing for 
enhancing a rough voice signal down in the noise.


Better decode capability for some of the more recent digital modes, FT8 
would seem an obvious one but how? Maybe on screen with a P3?


Has DSP hardware advanced significantly since the K3/S was designed? 
Maybe a replacement module with more recent DSP devices might allow even 
more possibilities. But maybe that's K4 land :)


Martin, HS0ZED



On 11/01/2019 06:20, Wayne Burdick wrote:

Hi all,

The K3/K3S and KX2/KX3 are SDRs, by definition, because they provide 
demodulation and modulation features via a DSP chip that is programmable.

Our DSP algorithms already give the user all the usual features expected of an 
all-mode transceiver, and then some:

   - DVR
   - variable passband filtering & IF shift
   - audio peaking filter (APF, for CW)
   - auto-spotting and automatic tuning (CW, PSK)
   - dual watch (KX2/KX3)
   - audio effects
   - DTMF (KX3)
   - dual-passband filtering for RTTY
   - FM subaudible tones
   - data decode/encode in various modes
   - noise reduction
   - RX and TX EQ
   - synchronous AM (K3/K3S)
   - ESSB
   - transmit noise gating
   - speech compression
   - manual notch filtering
   - autonotch

...etc.

That said, here's your chance to dream up *new* DSP features we haven't thought 
of. All suggestions will be debated by our engineering team, even those that 
appear radical or implausible at first glance.

We'll keep this to ourselves, so don't worry about being judged for tossing out 
some wacky ideas. Let's cast a broad net.

Please send all correspondence on this topic directly to yours truly.

73,
Wayne
N6KR



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Re: [Elecraft] Non-Resonant Antennas and Chokes

[John Oppenheimer]

On 1/13/19 11:24 PM, Jim Brown wrote:
>> The instrument used to measure this is quite simple.
>   I'd be very interested in how you're measuring the current at the 
> antenna feedpoint. :) That is NOT so simple.

The common mode current can be measured 1/2 wavelength from the
feedpoint. Here is an example:

https://www.kn5l.net/Balun-CM/

MFJ has a clamp-on current meter which can be used.

John KN5L
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Re: [Elecraft] Query for new DSP features

[Graziano Roccon (IW2NOY)]

Hello all, Hello Wayne,

following Mike KF6KXG suggestion, i would like to have a more intuitive 
Noise Reduction (NR).
I used several last Icom or Yaesu model and their NR are more intuitive 
and easy to use, without loose efficiency and without ruin the signal 
audio and strenght.
Especially the Yaesu, in models like the Ftdx3000, Ftdx5000, FT-991: 
where you simply push the DNR button and everything goes away except the 
signal that you can easily hear in the silence.


I love my K3s for many aspects and i will never change it for another 
radio but, the NR function always disappointed me.
Maybe is my problem but there are too much settings and often doesn't 
work as aspected, also it need to change settings when condition change 
and is difficult find one setting for all.


I would like to have and NR with just the level of intervention and that 
work like the last Yaesu, where the noise goes away and signal remain in 
the silence, also without changing the strenght of the signal and 
without causing distortions on the audio.


I had a FTdx3000 before the K3s and the only thing i am really missing 
is the Yaesu DNR, all the rest is done also by the K3s and better than 
the 3000.


I hope could be interesting and that can help and... happen :-)

Thanks a lot, Graziano Roccon IW2NOY

PS
Why not... a more intuitive digital mode name in the menu are welcome 
:-)



l 2019-01-12 05:38 Mike Lichtman via Elecraft ha scritto:

Wayne,
I would like to see an improved Noise Reduction that doesn’t lower
the volume or distort as much. Also the digital mode decode has never
really worked well for me and, yes,
I read the manual about using it. Could you have the digital choices
RTTY, PSK31, etc. instead of the current settings like FSK, data, etc?
Pie in the sky thought — Having the radio identify the type of digital
signal being received with a word in the display and automatically
change modes/settings to accommodate it.  73 Mike KF6KXG
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Re: [Elecraft] Battery Low K3

[Nr4c]

Good idea



Sent from my iPhone
...nr4c. bill


> On Jan 14, 2019, at 3:54 AM, Petr, OK1RP/M0SIS  wrote:
> 
> Hi,
> 
> finally it means that RTC lithium cell low voltage status is not alerted at
> all, right?
> So I should check it or better replace it after 11yrs, right? :)
> 
> 
> 
> 
> 
> -
> 73 - Petr, OK1RP 
> "Apple & Elecraft freak" 
> B:http://ok1rp.blogspot.com
> G+:http://goo.gl/w3u2s9
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[Elecraft] K2/100 for sale again!

[Derek Brook]

I have a nice K2/100, it is setup as the twins with the amp and tuner in
the EC2 case.It is packed and ready to go,who ever buys it.
This is for sale as is with no returns, because of parts swapping.
$1050 I will pay for shipping.

Derek/KD3GZ
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Re: [Elecraft] New DSP Idea

[Bill W4ZV]

David Gilbert wrote
> Yes, I agree that the computation needs to be done in the frequency 
> domain with an FFT.  I have no clue whether or not the K3 and K3s have 
> enough computational power to do so, but Lyle (Elecraft's DSP guru) 
> briefly discussed this idea with me when I suggested it several years 
> ago and he seemed to think it might be feasible.  At the time the K3 
> synths wouldn't preserve lock when you changed frequency so it wouldn't 
> have been very practical back then, but the new synths are fed by the 
> same oscillator now.

You asked a good question Dave.  I recall Lyle telling me the same years ago
(where is Lyle anyway...buried in K4 firmware?).  I've used the NCC-1,
MFJ-1025 and ANC-4 over the years to phase parallel staggered Beverages. 
This is probably beyond the processor in the K3 but it remains a good idea
to investigate for the K4.  The downside to phasing two identical antennas
internally is that you must give up diversity.  Using the NCC-1 output for
one input to the K3 diversity and a different antenna for the other allows
both simultaneously (but for two different purposes).

I'm afraid the market for users who want to do this sort of thing may be
small, but clearly there is a decent market for noise canceling devices. 
BTW noise canceling boxes ONLY work well for canceling a single local noise
source which requires a nearby sense antenna for one input (groundwave only
since propagation introduces constantly shifting relative phase changes).

73,  Bill  W4ZV

P.S.  The bottom 2 plots in the link below show what can be done by phasing
two parallel staggered Beverages:
http://users.vnet.net/btippett/new_page_10.htm




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Re: [Elecraft] Battery Low K3

[Petr, OK1RP/M0SIS]

Hi,

finally it means that RTC lithium cell low voltage status is not alerted at
all, right?
So I should check it or better replace it after 11yrs, right? :)





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73 - Petr, OK1RP 
"Apple & Elecraft freak" 
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