Re: [Elecraft] Planning the next filters

[Jim Brown]

On 3/8/2018 10:18 PM, Bill Frantz wrote:
This problem occurred with a SignaLink. 


That's not a very good interface. It helps to have an clip light or 
other digital level indicator on the interface for the received signal. 
My Tascam US100 has a green signal presence light and a red one for 
clip, which makes it easy to stay out of trouble.


73, Jim K9YC

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Re: [Elecraft] Planning the next filters

[Bill Frantz]

I understand that advice, and follow it most of the time. 
However, I found that when I was trying to receive weak PSK31 
signals, strong, nearby signals would make decode impossible. 
Using a combination of the 250 Hz filter with the DSP filter, 
sometimes as narrow as 50 Hz would allow decode. I think the 
problem was that the combination of the strong signal and the 
weak signal exceeded the dynamic range of the audio AtoD 
converter going into the computer, and the weak signal lost out. 
I could be wrong.


This problem occurred with a SignaLink. I have not had as much 
of a problem with the KIO3B running FT8, but the circumstances 
are different enough between the two modes that I'm not sure 
that is an apples to apples comparison. I was able to improve 
FT8 decode through the KIO3B when there were strong signals 2-3 
KHz away from the FT8 subband by narrowing the DSP bandwidth 
from 4K to 2.5K (which automatically switched from the 13 KHz FM 
filter to the stock 2.7 KHz filter).


73 Bill AE6JV

On 3/8/18 at 8:38 PM, j...@audiosystemsgroup.com (Jim Brown) wrote:


On 3/8/2018 1:08 PM, Bill Frantz wrote:
I got the 250 for eliminating loud PSK signals from wiping out 
weak ones. It was a bunch of playing with center and width, 
but worked quite well.


Hi Bill,

Recall my post from a few days ago about phase shift being the 
enemy of signal decoders, and that filters built with real 
components (and most digital domain filters) create phase shift 
in the passband. The steeper the skirts, the greater the phase 
shift, and the more it extends into the passband.


I don't work PSK31 and don't know about PSK31 decoders, but the 
authors of other decoding software (WSJT-X, 2Tone) recommend 
that radios use wide bandwidth and let the decoder reject 
off-frequency QRM. Heavy duty RTTY guys like W0YK recommend 500 
Hz for RTTY, and K1JT recommends the full bandwidth of SSB 
channel. I follow their advice, and find it works well for me.


73, Jim K9YC


---
Bill Frantz| Can't fix stupid, but duct   | Periwinkle
(408)356-8506  | tape can muffle the sound... | 16345 
Englewood Ave
www.pwpconsult.com |   - Bill Liebman | Los Gatos, 
CA 95032


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Re: [Elecraft] Planning the next filters

[Jim Brown]

On 3/8/2018 1:08 PM, Bill Frantz wrote:
I got the 250 for eliminating loud PSK signals from wiping out weak 
ones. It was a bunch of playing with center and width, but worked 
quite well.


Hi Bill,

Recall my post from a few days ago about phase shift being the enemy of 
signal decoders, and that filters built with real components (and most 
digital domain filters) create phase shift in the passband. The steeper 
the skirts, the greater the phase shift, and the more it extends into 
the passband.


I don't work PSK31 and don't know about PSK31 decoders, but the authors 
of other decoding software (WSJT-X, 2Tone) recommend that radios use 
wide bandwidth and let the decoder reject off-frequency QRM. Heavy duty 
RTTY guys like W0YK recommend 500 Hz for RTTY, and K1JT recommends the 
full bandwidth of SSB channel. I follow their advice, and find it works 
well for me.


73, Jim K9YC

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Re: [Elecraft] IFR1500 Service Monitor For Sale

[EricJ]

Usain Bolt ran 100 yards in slightly less than 10 seconds so 0.1 Hz can 
be accurately measured with a stopwatch.


Eric KE6US


On 3/8/2018 5:44 PM, Gary Baker wrote:

I have an IFR1500 Service monitor for sale--$3,300 plus shipping cost.  This
service monitor is in great condition with a new attenuator and center
frequency meter.  It has the high accuracy time base and can measure
frequencies down to

.1 Hz!  Photos available upon request.  73's, Gary-K7EMF

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[Elecraft] IFR1500 Service Monitor For Sale

[Gary Baker]

I have an IFR1500 Service monitor for sale--$3,300 plus shipping cost.  This
service monitor is in great condition with a new attenuator and center
frequency meter.  It has the high accuracy time base and can measure
frequencies down to 

.1 Hz!  Photos available upon request.  73's, Gary-K7EMF

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Re: [Elecraft] 1.8 kHz SSB Filter

[Bill Johnson]

Yes!

73,
Bill
K9YEQ

-Original Message-
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of Bob McGraw K4TAX
Sent: Thursday, March 8, 2018 7:22 PM
To: Elecraft List 
Subject: Re: [Elecraft] 1.8 kHz SSB Filter

I definitely agree regarding having a 1.8 kHz filter for SSB is a positive 
attribute.   In fact both of my radios have 1.8 kHz filters. And by reducing 
the DSP BW to 1.8 kHz and shifting the PBT, one would be amazed at how well a 
SSB signal really sounds. Certainly worth the investment in my experience.

73

Bob, K4TAX


On 3/8/2018 4:38 PM, elecraft-requ...@mailman.qth.net wrote:
> Message: 1
> Date: Thu, 8 Mar 2018 11:57:32 -0500
> From: Craig Buck
> To: Chuck Chandler Cc:elecraft@mailman.qth.net
> Subject: Re: [Elecraft] Planning the next filters
> Message-ID:
>   
> Content-Type: text/plain; charset="UTF-8"
>
> Get the 1.8 if you work ssb.  Experiment with shifting the pass band 
> for maximum clarity.  Youll be amazed just how narrow it can get and 
> still be understandable.
>
> On Mar 8, 2018 11:24 AM, "Chuck Chandler"  wrote:
>
>> Right now I have the stock SSB and a 400 Hz filter in both main and 
>> sub rcvrs.  I would like to add some a few at a time.  My first 
>> priority is to add a couple to the main receiver, since it is the 
>> biggest chore to get to.
>>
>> I plan on a 250 Hz CW filter, but am going back and forth between the 
>> 2.1 and 1.8 kHz filters.  I know that narrowing the DSP to 1.8 gives 
>> a really difficult to understand voice signal, while the 2.1 allows 
>> in more adjacent signals.  However, the roofing filters may not behave in 
>> the same manner.
>> For example, the 1.8 could be set to turn on at 2.1 to take advantage 
>> of skirt shape.
>>
>> I primarily DX, and operate in some contests as well.  I know SSB 
>> contests really need a narrow SSB filter.
>>
>> Any suggestions on the matter from those who have gone this route before?
>>
>> 73 de Chuck, WS1L

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Re: [Elecraft] 1.8 kHz SSB Filter

[Bob McGraw K4TAX]

I definitely agree regarding having a 1.8 kHz filter for SSB is a 
positive attribute.   In fact both of my radios have 1.8 kHz filters.   
And by reducing the DSP BW to 1.8 kHz and shifting the PBT, one would be 
amazed at how well a SSB signal really sounds. Certainly worth the 
investment in my experience.


73

Bob, K4TAX


On 3/8/2018 4:38 PM, elecraft-requ...@mailman.qth.net wrote:

Message: 1
Date: Thu, 8 Mar 2018 11:57:32 -0500
From: Craig Buck
To: Chuck Chandler
Cc:elecraft@mailman.qth.net
Subject: Re: [Elecraft] Planning the next filters
Message-ID:

Content-Type: text/plain; charset="UTF-8"

Get the 1.8 if you work ssb.  Experiment with shifting the pass band for
maximum clarity.  Youll be amazed just how narrow it can get and still be
understandable.

On Mar 8, 2018 11:24 AM, "Chuck Chandler"  wrote:


Right now I have the stock SSB and a 400 Hz filter in both main and sub
rcvrs.  I would like to add some a few at a time.  My first priority is to
add a couple to the main receiver, since it is the biggest chore to get
to.

I plan on a 250 Hz CW filter, but am going back and forth between the 2.1
and 1.8 kHz filters.  I know that narrowing the DSP to 1.8 gives a really
difficult to understand voice signal, while the 2.1 allows in more adjacent
signals.  However, the roofing filters may not behave in the same manner.
For example, the 1.8 could be set to turn on at 2.1 to take advantage of
skirt shape.

I primarily DX, and operate in some contests as well.  I know SSB contests
really need a narrow SSB filter.

Any suggestions on the matter from those who have gone this route before?

73 de Chuck, WS1L


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Re: [Elecraft] 3D-print case for KXPD2

[Mike Markowski]

Very nice, Johan!  A 3d printer is tempting, though I have no real 
need...  Kind of like this radio hobby we're all addicted to.  :-)


73,
Mike ab3ap

On 03/07/2018 02:59 PM, Johan Ymerson wrote:

Hi,

I just received my KXPD2 and needed a case to protect it.
Couldn't find one so I created one to print in my 3D printer :-)
Thought I share it for anyone who find it useful:https://
www.youmagine.com/designs/kxpd2-case

73 de SM0XHJ

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Re: [Elecraft] k3 key out jack

[Don Wilhelm]

Shel,

Keyout is on RF Board sheet 1.
Is your problem only from the internal keyer?  In other words, does it 
work when you use a hand key or computer keying?


If also a problem from a hand key or computer keying, then what is the 
DC voltage at the gate of Q3 during keydown - should be almost 12 volts.

Do you have 7 volts on the gate of Q5 during receive?

The Keyout is a simple circuit consisting only of Q3 and Q5 - when in 
transmit, the 7R input should go to near zero, and that should make the 
gate of Q3 go to a high voltage (almost 12 volts) - that is all there is 
to it.


73,
Don W3FPR



On 3/8/2018 4:42 PM, Shel Sherman wrote:



Sent from Mail for Windows 10
My K3 does not pull the key out line to ground when pulsed by the internal 
keyer, I need some help in tracing the circuit on a schematic.

Shel Sherman  WO0C
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[Elecraft] k3 key out jack

[Shel Sherman]

Sent from Mail for Windows 10
My K3 does not pull the key out line to ground when pulsed by the internal 
keyer, I need some help in tracing the circuit on a schematic.

Shel Sherman  WO0C
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[Elecraft] K3S For sale 100 Watt version with ATU

[Wayne Michael]

I have a K3S for sale   (Original owner)

It was factory calibrated when I had the LPA board replaced shortly after it 
was built.

It has been a great radio will be missed but I need to make room.

Mic,  Power cables, manual

3000 OBO

Pics available on demand.

Also listed in the facebook "ham radio for sale" group along with a few other 
rigs I have for sale.

I have to admit I am afraid I am going to regret selling it...

Wayne  AC9HP


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Re: [Elecraft] Planning the next filters

[Bill Frantz]

I am a all-band, all-mode operator. I contest, chase DX, and 
just make contacts.


I have something close to what you are considering. I have 250, 
2.1K, 2.7K, and 13K filters in both my main and sub receivers. I 
got the 250 for eliminating loud PSK signals from wiping out 
weak ones. It was a bunch of playing with center and width, but 
worked quite well.


I also use the 250 on CW, sometimes narrowing the DSP bandwidth 
to 50 Hz to minimize noise, or nearby QRM when listening to a DX 
station. In a DX chase, hopefully the DX will have a bit of 
spectrum all to its own, but with DQRM and people tuning up on 
the DX frequency, narrow bandwidth can be very useful. If the DX 
frequency is clear, the Audio Peaking Filter can work better 
than the 50 Hz DSP bandwidth in reducing noise.


Joe is making me tempted to replace the 250s with 200s -- I've 
had problems in contests with nearby strong stations.  Jim makes 
an good argument for the 2.8K ones for cleaner digital transmission.


As you may have noticed, the filter configuration is a highly 
individual choice. With the DSP as good as it is, you should 
have fine performance whichever way you choose.


73 Bill AE6JV

On 3/8/18 at 8:22 AM, chandler...@gmail.com (Chuck Chandler) wrote:


I plan on a 250 Hz CW filter, but am going back and forth between the 2.1
and 1.8 kHz filters.  I know that narrowing the DSP to 1.8 gives a really
difficult to understand voice signal, while the 2.1 allows in more adjacent
signals.  However, the roofing filters may not behave in the same manner.
For example, the 1.8 could be set to turn on at 2.1 to take advantage of
skirt shape.

I primarily DX, and operate in some contests as well.  I know SSB contests
really need a narrow SSB filter.

Any suggestions on the matter from those who have gone this route before?

73 de Chuck, WS1L




On 3/8/18 at 9:32 AM, li...@subich.com (Joe Subich, W4TV) wrote:


... If you feel you *need* a narrower filter in the 8215 KHz IF,
consider the new KFL3C-200 which is truly 200 Hz wide at -6 dB.
See:  particularly the
last graph.


-
Bill Frantz| Government is not reason, it is not 
eloquence, it is force; like
408-356-8506   | a fire, a troublesome servant and a fearful 
master. Never for a
www.pwpconsult.com | moment should it be left to irresponsible 
action. Geo Washington


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Re: [Elecraft] BNC connector oddity on KX3

[rich hurd WC3T]

That's one thing I was able to check; connector is tightened securely on
the shell of the KX3.  Thanks.

On Thu, Mar 8, 2018 at 3:44 PM, Don Wilhelm  wrote:

> Rich,
>
> If the BNC connector rotates even a wee bit, that is the problem - tighten
> the BNC jack.  A good connection to the jack shell is required.
> "Opening it up" is not a big deal - unless you have the 2 meter option -
> just remove the bottom cover, no more complicated than changing batteries.
>
> 73,
> Don W3FPR
>
>
> On 3/8/2018 3:20 PM, rich hurd WC3T wrote:
>
>> I have three more days of checking various configurations including
>> binding
>> post antennas, end fed half waves, opening the damn thing up...   Thanks
>> all for the suggestions.
>>
>> On Thu, Mar 8, 2018 at 2:50 PM, Walter Underwood 
>> wrote:
>>
>> Open it up and make sure that the antenna connector is securely connected
>>> to the ATU board.
>>>
>>> wunder
>>> K6WRU
>>> Walter Underwood
>>> CM87wj
>>> http://observer.wunderwood.org/ (my blog)
>>>
>>> On Mar 8, 2018, at 11:46 AM, GRANT YOUNGMAN 

>>> wrote:
>>>

 So was the antenna and related cabling/connectors good as verified by

>>> your analyzer at the point of the radio connection?  In some 60 years of
>>> doing this, I have yet to find the radio to be the problem when it tells
>>> me
>>> it’s looking into high SWR.  There’s a first time for everything, course
>>> :-)
>>>


 On Mar 8, 2018, at 2:23 PM, rich hurd WC3T  wrote:
>
> Okay, so I took the plunge and disconnected the KX3 to take with me on
> vacation.   Hooking it back up proved to be a tad problematic - SWRs of
> 25:1 and no signals from any bands, anywhere.  I'm now working through
>
 what
>>>
 options I have, starting with checking female connector deformation and
> doing what I can to examine oxidation, and general quarrantining of
>
 wires
>>>
 and connectors.
>
> I also wrote to Elecraft to get a quote for a replacement BNC connector
> with the LPF installed - worst case is I'll just start over again with
> a
> new chassis connector.
>
> Ain't radio fun?   :)
>
>
 Grant NQ5T
 K3 #2091, KX3 #8342



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>>>
>>> __
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>>> Message delivered to r...@wc3t.us
>>>
>>>
>>
>>
>>


-- 
72,
Rich Hurd / WC3T / DMR: 3142737
PA Army MARS, Northampton County RACES, EPA-ARRL Public Information Officer
for Scouting
Latitude: 40.761621 Longitude: -75.288988  (40°45.68' N 75°17.33' W) Grid:
*FN20is*
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Re: [Elecraft] Planning the next filters

[Barry Simpson]

Hi Craig

I would go for the 200Hz filters, not the 250Hz. I added the 200Hz to my
main and sub receivers (already have the 400Hz) and they are a really
worthwhile addition.

That's my opinion FWIW.

73

Barry  VK2BJ

On 9 March 2018 at 03:57, Craig Buck  wrote:

> Get the 1.8 if you work ssb.  Experiment with shifting the pass band for
> maximum clarity.  Youll be amazed just how narrow it can get and still be
> understandable.
>
> On Mar 8, 2018 11:24 AM, "Chuck Chandler"  wrote:
>
> > Right now I have the stock SSB and a 400 Hz filter in both main and sub
> > rcvrs.  I would like to add some a few at a time.  My first priority is
> to
> > add a couple to the main receiver, since it is the biggest chore to get
> > to.
> >
> > I plan on a 250 Hz CW filter, but am going back and forth between the 2.1
> > and 1.8 kHz filters.  I know that narrowing the DSP to 1.8 gives a really
> > difficult to understand voice signal, while the 2.1 allows in more
> adjacent
> > signals.  However, the roofing filters may not behave in the same manner.
> > For example, the 1.8 could be set to turn on at 2.1 to take advantage of
> > skirt shape.
> >
> > I primarily DX, and operate in some contests as well.  I know SSB
> contests
> > really need a narrow SSB filter.
> >
> > Any suggestions on the matter from those who have gone this route before?
> >
> > 73 de Chuck, WS1L
> >
> > --
> >
> >
> > ===
> > Chuck Chandler
> > chandler...@gmail.com
> > ===
> > __
> > Elecraft mailing list
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> >
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> > Message delivered to radiok...@gmail.com
> >
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>
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Re: [Elecraft] BNC connector oddity on KX3

[Don Wilhelm]

Rich,

If the BNC connector rotates even a wee bit, that is the problem - 
tighten the BNC jack.  A good connection to the jack shell is required.
"Opening it up" is not a big deal - unless you have the 2 meter option - 
just remove the bottom cover, no more complicated than changing batteries.


73,
Don W3FPR

On 3/8/2018 3:20 PM, rich hurd WC3T wrote:

I have three more days of checking various configurations including binding
post antennas, end fed half waves, opening the damn thing up...   Thanks
all for the suggestions.

On Thu, Mar 8, 2018 at 2:50 PM, Walter Underwood 
wrote:


Open it up and make sure that the antenna connector is securely connected
to the ATU board.

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


On Mar 8, 2018, at 11:46 AM, GRANT YOUNGMAN 

wrote:


So was the antenna and related cabling/connectors good as verified by

your analyzer at the point of the radio connection?  In some 60 years of
doing this, I have yet to find the radio to be the problem when it tells me
it’s looking into high SWR.  There’s a first time for everything, course :-)




On Mar 8, 2018, at 2:23 PM, rich hurd WC3T  wrote:

Okay, so I took the plunge and disconnected the KX3 to take with me on
vacation.   Hooking it back up proved to be a tad problematic - SWRs of
25:1 and no signals from any bands, anywhere.  I'm now working through

what

options I have, starting with checking female connector deformation and
doing what I can to examine oxidation, and general quarrantining of

wires

and connectors.

I also wrote to Elecraft to get a quote for a replacement BNC connector
with the LPF installed - worst case is I'll just start over again with a
new chassis connector.

Ain't radio fun?   :)



Grant NQ5T
K3 #2091, KX3 #8342



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Re: [Elecraft] BNC connector oddity on KX3

[rich hurd WC3T]

I have three more days of checking various configurations including binding
post antennas, end fed half waves, opening the damn thing up...   Thanks
all for the suggestions.

On Thu, Mar 8, 2018 at 2:50 PM, Walter Underwood 
wrote:

> Open it up and make sure that the antenna connector is securely connected
> to the ATU board.
>
> wunder
> K6WRU
> Walter Underwood
> CM87wj
> http://observer.wunderwood.org/ (my blog)
>
> > On Mar 8, 2018, at 11:46 AM, GRANT YOUNGMAN 
> wrote:
> >
> > So was the antenna and related cabling/connectors good as verified by
> your analyzer at the point of the radio connection?  In some 60 years of
> doing this, I have yet to find the radio to be the problem when it tells me
> it’s looking into high SWR.  There’s a first time for everything, course :-)
> >
> >
> >> On Mar 8, 2018, at 2:23 PM, rich hurd WC3T  wrote:
> >>
> >> Okay, so I took the plunge and disconnected the KX3 to take with me on
> >> vacation.   Hooking it back up proved to be a tad problematic - SWRs of
> >> 25:1 and no signals from any bands, anywhere.  I'm now working through
> what
> >> options I have, starting with checking female connector deformation and
> >> doing what I can to examine oxidation, and general quarrantining of
> wires
> >> and connectors.
> >>
> >> I also wrote to Elecraft to get a quote for a replacement BNC connector
> >> with the LPF installed - worst case is I'll just start over again with a
> >> new chassis connector.
> >>
> >> Ain't radio fun?   :)
> >>
> >
> > Grant NQ5T
> > K3 #2091, KX3 #8342
> >
> >
> >
> > __
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-- 
72,
Rich Hurd / WC3T / DMR: 3142737
PA Army MARS, Northampton County RACES, EPA-ARRL Public Information Officer
for Scouting
Latitude: 40.761621 Longitude: -75.288988  (40°45.68' N 75°17.33' W) Grid:
*FN20is*
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Re: [Elecraft] Planning the next filters

[Wes Stewart]

I would replace the 2.7 with the 2.8, keep the 400 and be done with it. I did.

The purpose of the "roofing filters" (I hate that term) is to protect the 2nd 
mixer from overload.  The wider filter is used on TX as well and the 2.8 has 
superior symmetry which helps opposite sideband rejection.


Most of the garbage you will hear, particularly on SSB is from the lousy phase 
noise and TX IMD (K3s include here) from adjacent signals falling in your RX 
passband.  No amount of filtering on your end will fix this.


Wes  N7WS

On 3/8/2018 9:22 AM, Chuck Chandler wrote:

Right now I have the stock SSB and a 400 Hz filter in both main and sub
rcvrs.  I would like to add some a few at a time.  My first priority is to
add a couple to the main receiver, since it is the biggest chore to get
to.

I plan on a 250 Hz CW filter, but am going back and forth between the 2.1
and 1.8 kHz filters.  I know that narrowing the DSP to 1.8 gives a really
difficult to understand voice signal, while the 2.1 allows in more adjacent
signals.  However, the roofing filters may not behave in the same manner.
For example, the 1.8 could be set to turn on at 2.1 to take advantage of
skirt shape.

I primarily DX, and operate in some contests as well.  I know SSB contests
really need a narrow SSB filter.

Any suggestions on the matter from those who have gone this route before?

73 de Chuck, WS1L



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Re: [Elecraft] BNC connector oddity on KX3

[Walter Underwood]

Open it up and make sure that the antenna connector is securely connected to 
the ATU board.

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

> On Mar 8, 2018, at 11:46 AM, GRANT YOUNGMAN  wrote:
> 
> So was the antenna and related cabling/connectors good as verified by your 
> analyzer at the point of the radio connection?  In some 60 years of doing 
> this, I have yet to find the radio to be the problem when it tells me it’s 
> looking into high SWR.  There’s a first time for everything, course :-)
> 
> 
>> On Mar 8, 2018, at 2:23 PM, rich hurd WC3T  wrote:
>> 
>> Okay, so I took the plunge and disconnected the KX3 to take with me on
>> vacation.   Hooking it back up proved to be a tad problematic - SWRs of
>> 25:1 and no signals from any bands, anywhere.  I'm now working through what
>> options I have, starting with checking female connector deformation and
>> doing what I can to examine oxidation, and general quarrantining of wires
>> and connectors.
>> 
>> I also wrote to Elecraft to get a quote for a replacement BNC connector
>> with the LPF installed - worst case is I'll just start over again with a
>> new chassis connector.
>> 
>> Ain't radio fun?   :)
>> 
> 
> Grant NQ5T
> K3 #2091, KX3 #8342
> 
> 
> 
> __
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Re: [Elecraft] BNC connector oddity on KX3

[GRANT YOUNGMAN]

So was the antenna and related cabling/connectors good as verified by your 
analyzer at the point of the radio connection?  In some 60 years of doing this, 
I have yet to find the radio to be the problem when it tells me it’s looking 
into high SWR.  There’s a first time for everything, course :-)


> On Mar 8, 2018, at 2:23 PM, rich hurd WC3T  wrote:
> 
> Okay, so I took the plunge and disconnected the KX3 to take with me on
> vacation.   Hooking it back up proved to be a tad problematic - SWRs of
> 25:1 and no signals from any bands, anywhere.  I'm now working through what
> options I have, starting with checking female connector deformation and
> doing what I can to examine oxidation, and general quarrantining of wires
> and connectors.
> 
> I also wrote to Elecraft to get a quote for a replacement BNC connector
> with the LPF installed - worst case is I'll just start over again with a
> new chassis connector.
> 
> Ain't radio fun?   :)
> 

Grant NQ5T
K3 #2091, KX3 #8342



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Re: [Elecraft] [KX3] Re: BNC connector oddity on KX3

[Walter Underwood]

The upgraded BNC is part KX3BNCMDKT, $49, listed on this page.

http://www.elecraft.com/order_form_parts.htm#kx3

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

> On Mar 8, 2018, at 11:23 AM, rich hurd WC3T r...@wc3t.us [KX3] 
>  wrote:
> 
> 
> Okay, so I took the plunge and disconnected the KX3 to take with me on 
> vacation.   Hooking it back up proved to be a tad problematic - SWRs of 25:1 
> and no signals from any bands, anywhere.  I'm now working through what 
> options I have, starting with checking female connector deformation and doing 
> what I can to examine oxidation, and general quarrantining of wires and 
> connectors.   
> 
> I also wrote to Elecraft to get a quote for a replacement BNC connector with 
> the LPF installed - worst case is I'll just start over again with a new 
> chassis connector.
> 
> Ain't radio fun?   :)
> 
> On Mon, Feb 19, 2018 at 11:54 AM, rich hurd WC3T  > wrote:
> Hi,
> 
> I had an oddity with hooking an antenna to the BNC connector on my KX3 that 
> happened enough times to be chalked up to something other than random chance. 
>Looking for opinions on whether my solution aligned to your experience(s).
> 
> I have a complete station - a KX3, a PX3, and a KXPA100.   The KXPA100 is 
> connected via a Cables On Demand connector with a PL259 on one end and a BNC 
> connector on the other end.  All other interface cables are Elecraft standard.
> 
> This is NOT the first BNC connector that I've used.  Prior to this last 
> acquisition I had a couple of other BNC to PL259 jumpers that I was using, 
> and the usual smattering of connectors and adapters in the junque box..  
> 
> No matter which one I used, If I removed the BNC connector from the rig 
> (maybe to go portable, for example, or the last time it was because I 
> installed Eneloop Pro batteries to the internal battery holders) I would put 
> everything back together, and then would have severe - almost debilitating - 
> signal attenuation when I got the rig fired up.   If I twisted and spun the 
> BNC connector on the jack, it would improve, and then get bad again more 
> often than not.   It could take up to 20 minutes to get everything "dialed 
> in" so that the signal was appearing again. God help me if I accidentally 
> moved something after that.  And of course, while all this was happening the 
> ATU was having fits, with 99:1 SWR readings and the amp was going offline; 
> all kinds of weirdnesses.   After things calmed down. the ATU behaved itself, 
> the amp stopped being pouty, and all was then good.
> 
> Thankfully, now that I have the Cables On Demand product, things seem to have 
> quieted down - although I still don't disconnect without provocation.  :)   
> Though I'm desperately afraid of when I start to go mobile after the snow 
> melts and the weather gets nice again.   :)Hope I can get my IC706 fixed 
> and back in service as my base station before that occurs.  
> 
> My question was going to be in desperation more than anything else if this 
> last cable didn't work, but thankfully, that's been the only cable vendor 
> that I trust for any of my specialized cables and they haven't failed me even 
> with this one. 
> 
> Are BNC connectors that finicky?   Is it possible that I just had a bad batch 
> of low quality jumpers?   I'm just wondering if anyone else has had excessive 
> fiddling with their BNC connections.
> 
> ---
> 72,
> Rich Hurd / WC3T / DMR: 3142737  
> PA Army MARS, Northampton County RACES, EPA-ARRL Public Information Officer 
> for Scouting
> Latitude: 40.761621 Longitude: -75.288988  (40°45.68' N 75°17.33' W) Grid: 
> FN20is
> 
> 
> 
> 
> -- 
> 72,
> Rich Hurd / WC3T / DMR: 3142737  
> PA Army MARS, Northampton County RACES, EPA-ARRL Public Information Officer 
> for Scouting
> Latitude: 40.761621 Longitude: -75.288988  (40°45.68' N 75°17.33' W) Grid: 
> FN20is
> 
> 
> __._,_.___
> Posted by: rich hurd WC3T > 
> Reply via web post 
> 
> •   Reply to sender  
>  
>  •   Reply to group  
> 
>•   Start a New Topic 
> 
> •   Messages in this topic 
> 

Re: [Elecraft] BNC connector oddity on KX3

[rich hurd WC3T]

Okay, so I took the plunge and disconnected the KX3 to take with me on
vacation.   Hooking it back up proved to be a tad problematic - SWRs of
25:1 and no signals from any bands, anywhere.  I'm now working through what
options I have, starting with checking female connector deformation and
doing what I can to examine oxidation, and general quarrantining of wires
and connectors.

I also wrote to Elecraft to get a quote for a replacement BNC connector
with the LPF installed - worst case is I'll just start over again with a
new chassis connector.

Ain't radio fun?   :)

On Mon, Feb 19, 2018 at 11:54 AM, rich hurd WC3T  wrote:

> Hi,
>
> I had an oddity with hooking an antenna to the BNC connector on my KX3
> that happened enough times to be chalked up to something other than random
> chance.Looking for opinions on whether my solution aligned to your
> experience(s).
>
> I have a complete station - a KX3, a PX3, and a KXPA100.   The KXPA100 is
> connected via a Cables On Demand connector with a PL259 on one end and a
> BNC connector on the other end.  All other interface cables are Elecraft
> standard.
>
> This is NOT the first BNC connector that I've used.  Prior to this last
> acquisition I had a couple of other BNC to PL259 jumpers that I was using,
> and the usual smattering of connectors and adapters in the junque box.
>
> No matter which one I used, If I removed the BNC connector from the rig
> (maybe to go portable, for example, or the last time it was because I
> installed Eneloop Pro batteries to the internal battery holders) I would
> put everything back together, and then would have severe - almost
> debilitating - signal attenuation when I got the rig fired up.   If I
> twisted and spun the BNC connector on the jack, it would improve, and then
> get bad again more often than not.   It could take up to 20 minutes to get
> everything "dialed in" so that the signal was appearing again. God help me
> if I accidentally moved something after that.  And of course, while all
> this was happening the ATU was having fits, with 99:1 SWR readings and the
> amp was going offline; all kinds of weirdnesses.   After things calmed
> down. the ATU behaved itself, the amp stopped being pouty, and all was then
> good.
>
> Thankfully, now that I have the Cables On Demand product, things seem to
> have quieted down - although I still don't disconnect without provocation.
> :)   Though I'm desperately afraid of when I start to go mobile after the
> snow melts and the weather gets nice again.   :)Hope I can get my IC706
> fixed and back in service as my base station before that occurs.
>
> My question was going to be in desperation more than anything else if this
> last cable didn't work, but thankfully, that's been the only cable vendor
> that I trust for any of my specialized cables and they haven't failed me
> even with this one.
>
> Are BNC connectors that finicky?   Is it possible that I just had a bad
> batch of low quality jumpers?   I'm just wondering if anyone else has had
> excessive fiddling with their BNC connections.
>
> ---
> 72,
> Rich Hurd / WC3T / DMR: 3142737
> PA Army MARS, Northampton County RACES, EPA-ARRL Public Information
> Officer for Scouting
> Latitude: 40.761621 Longitude: -75.288988  (40°45.68' N 75°17.33' W)
> Grid: *FN20is*
>
>


-- 
72,
Rich Hurd / WC3T / DMR: 3142737
PA Army MARS, Northampton County RACES, EPA-ARRL Public Information Officer
for Scouting
Latitude: 40.761621 Longitude: -75.288988  (40°45.68' N 75°17.33' W) Grid:
*FN20is*
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Re: [Elecraft] Planning the next filters

[Jim Brown]

It's important to understand that the variable DSP IF is plenty good 
enough for most operation. The function of the roofing filter is to 
protect the DSP from overload by strong signals outside the passband. I 
would consider buying additional filters ONLY if you're a serious 
contester.  I am, and my favorites are 250 and 400 for CW, 2.1 for SSB, 
and I've replaced the 2.7 with 2.8 for the improved flatness it 
provides, which reduces incidental AM when transmitting RTTY. I agree 
that 1.8 is too narrow for my ears.


73, Jim K9YC

On 3/8/2018 8:22 AM, Chuck Chandler wrote:

Right now I have the stock SSB and a 400 Hz filter in both main and sub
rcvrs.  I would like to add some a few at a time.  My first priority is to
add a couple to the main receiver, since it is the biggest chore to get
to.

I plan on a 250 Hz CW filter, but am going back and forth between the 2.1
and 1.8 kHz filters.  I know that narrowing the DSP to 1.8 gives a really
difficult to understand voice signal, while the 2.1 allows in more adjacent
signals.  However, the roofing filters may not behave in the same manner.
For example, the 1.8 could be set to turn on at 2.1 to take advantage of
skirt shape.



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Re: [Elecraft] Planning the next filters

[Dave Hachadorian]

I think you are optimally configured right now.  I used to have 
the 1.8 filters in my K3's, but sold them.  I think they hurt 
intelligibility more than they helped with QRM rejection. 
Remember that these are only roofing filters.  The DSP filter has 
a higher effective shape factor, especially on SSB.  Elecraft 
once said in an email that you could estimate the DSP shape 
factor by the formula (DSP BW SETTING+ 300 Hz)/(DSP BW SETTING). 
Especially for the SSB filters, the DSP shape factor is the 
determinant in bandwidth, as long as there is no signal just 
outside the DSP width that is causing the AGC to pump, or the A/D 
to overload.  Those effects, in the very rare event that they 
occur, can be minimized by judicious use of the RF Gain control.


As for the 250 Hz CW filter, If you look at the filter curves 
http://www.elecraft.com/K3/K3_filter_plots.htm  you will see that 
this filter should be really labeled KFL3A-370, and is not much 
different than your 400.


Dave Hachadorian, K6LL
Yuma, AZ




-Original Message- 
From: Chuck Chandler

Sent: Thursday, March 8, 2018 9:22 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Planning the next filters

Right now I have the stock SSB and a 400 Hz filter in both main 
and sub
rcvrs.  I would like to add some a few at a time.  My first 
priority is to
add a couple to the main receiver, since it is the biggest chore 
to get

to.

I plan on a 250 Hz CW filter, but am going back and forth between 
the 2.1
and 1.8 kHz filters.  I know that narrowing the DSP to 1.8 gives 
a really
difficult to understand voice signal, while the 2.1 allows in 
more adjacent
signals.  However, the roofing filters may not behave in the same 
manner.
For example, the 1.8 could be set to turn on at 2.1 to take 
advantage of

skirt shape.

I primarily DX, and operate in some contests as well.  I know SSB 
contests

really need a narrow SSB filter.

Any suggestions on the matter from those who have gone this route 
before?


73 de Chuck, WS1L

--


===
Chuck Chandler
chandler...@gmail.com
===
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Re: [Elecraft] Planning the next filters

[donovanf]

Hi Chuck, 


The purpose of roofing filters in the K3 is commonly misunderstood, 
they're primary function is to protect the receiver from overload from 
an extremely strong interfering signal within the passband occupied 
by the signal of interest. There's an excellent paper on this topic on 
the Elecraft web site: 



http://www.elecraft.com/K3/Roofing_Filters.htm 


You can find the plots for many of the Elecraft filters here 
(caution: many of the plots use different frequency spans): 


http://www.elecraft.com/K3/K3_filter_plots.htm 


There's very little difference in the performance of the Elecraft 
400 Hz filters vs. their narrower bandwidth filters. The 400 Hz 
filter you already have is all you will ever need in all but the most 
extreme (and rare) interference situations. 


T he 1 kHz filter is a useful addition to your receiver i f you like 
broader bandwidth for casual CW operation, although the 2.1 kHz 
filter works nearly as well if you narrow the DSP bandwidth. 


There's very little difference between the 2.7 kHz stock filter and the 
2.8 kHz 8 pole optional filter except in the most extreme interference 
situations such SSB DX contests where its tighter skirts of the 
2.8 kHz are sometimes be helpful but the difference is small. 


I prefer the 2.1 kHz filter to the 1.8 kHz filter. I have both filters 
in my K3 but rarely use the 1.8 kHz filter and only under the most 
extreme inteference situations in a SSB DX contest. 


73 
Frank 
W3LPL 



On Thu, Mar 8, 2018 at 11:24 AM Chuck Chandler  
wrote: 

> Right now I have the stock SSB and a 400 Hz filter in both main and sub 
> rcvrs. I would like to add some a few at a time. My first priority is to 
> add a couple to the main receiver, since it is the biggest chore to get 
> to. 
> 
> I plan on a 250 Hz CW filter, but am going back and forth between the 2.1 
> and 1.8 kHz filters. I know that narrowing the DSP to 1.8 gives a really 
> difficult to understand voice signal, while the 2.1 allows in more adjacent 
> signals. However, the roofing filters may not behave in the same manner. 
> For example, the 1.8 could be set to turn on at 2.1 to take advantage of 
> skirt shape. 
> 
> I primarily DX, and operate in some contests as well. I know SSB contests 
> really need a narrow SSB filter. 
> 
> Any suggestions on the matter from those who have gone this route before? 
> 
> 73 de Chuck, WS1L 
> 
> -- 
> 
> 
> === 
> Chuck Chandler 
> chandler...@gmail.com 
> === 
> __ 
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Re: [Elecraft] Planning the next filters

[Joe Subich, W4TV]

> I plan on a 250 Hz CW filter,

I may be the odd man out but I can't see much enough difference between
the "400 Hz" (450 Hz @ -6dB) and the "250 Hz" (370 Hz @ -6dB) to justify
the cost.  If you feel you *need* a narrower filter in the 8215 KHz IF,
consider the new KFL3C-200 which is truly 200 Hz wide at -6 dB.
See:  particularly the
last graph.


but am going back and forth between the 2.1 and 1.8 kHz filters.


My choice - after trying the 1.5 KHz filters from INRAD and working with
both 2.1 KHz and 1.8 KHz DSP bandwidths (with center frequency offset to
maintain the low frequency cutoff at 100 - 250 Hz) was the 2.1 KHz
filter.  I felt the DSP provided sufficient high frequency roll off
if/when it was needed but the 2.1 KHz filter provided more flexibility -
and I ended up using 2.4 KHz - with the 2.1 KHz "roofing" filter set to
kick in at 2.4 KHz - as my "normal" SSB bandwidth.

While amateur activity is not channelized, most day-to day SSB activity
seems to fall on 3 KHz boundaries with occasional 2.5 KHz "steps".  Even
in a busy contest, things don't tend to get closer than 2 KHz as long as
the stations can "hear".  Most of the QRM on SSB isn't necessarily from
overlapping signals ... it's from transmit phase noise and IMD.  That's
not something that *any* receiver filter can deal with as those are
"spurious" signals outside the "necessary bandwidth" generated and
radiated by the transmitting (interfering) station.

73,

   ... Joe, W4TV


On 3/8/2018 11:22 AM, Chuck Chandler wrote:

Right now I have the stock SSB and a 400 Hz filter in both main and sub
rcvrs.  I would like to add some a few at a time.  My first priority is to
add a couple to the main receiver, since it is the biggest chore to get
to.

I plan on a 250 Hz CW filter, but am going back and forth between the 2.1
and 1.8 kHz filters.  I know that narrowing the DSP to 1.8 gives a really
difficult to understand voice signal, while the 2.1 allows in more adjacent
signals.  However, the roofing filters may not behave in the same manner.
For example, the 1.8 could be set to turn on at 2.1 to take advantage of
skirt shape.

I primarily DX, and operate in some contests as well.  I know SSB contests
really need a narrow SSB filter.

Any suggestions on the matter from those who have gone this route before?

73 de Chuck, WS1L


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[Elecraft] Planning the next filters

[j...@kk9a.com]

400Hz is my favorite CW/RTTY filter. I also have a 250Hz but if you read
the archives you will see that it is not much narrower than the 400. If
you are concerned about the cost this is worth looking at. I have the
2.1KHz and 1.8KHz SSB filters.  Of course the 2.1 sounds better, I switch
in the 1.8 when QRM worsens. I think having both is useful.

John KK9A


WS1L wrote:

Right now I have the stock SSB and a 400 Hz filter in both main and sub
rcvrs.  I would like to add some a few at a time.  My first priority is to
add a couple to the main receiver, since it is the biggest chore to get
to.

I plan on a 250 Hz CW filter, but am going back and forth between the 2.1
and 1.8 kHz filters.  I know that narrowing the DSP to 1.8 gives a really
difficult to understand voice signal, while the 2.1 allows in more adjacent
signals.  However, the roofing filters may not behave in the same manner.
For example, the 1.8 could be set to turn on at 2.1 to take advantage of
skirt shape.

I primarily DX, and operate in some contests as well.  I know SSB contests
really need a narrow SSB filter.

Any suggestions on the matter from those who have gone this route before?

73 de Chuck, WS1L


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Re: [Elecraft] Planning the next filters

[GaryK9GS]

Hi Chuck,
I agree with K9FN.  I have the 250 Hz filters and rarely use them.  The 400 Hz 
filters are great.  So good that I would not miss the 250s at all.
On SSB I also have the stock filters.  Here's how I handle crowded phone 
contests.  I set the width to 2.0, sometimes 1.8.  Then use the shift knob to 
clean up the signal.  It is amazing how that works and most of the time the 
desired signal pops right out of the QRM.
I contest and chase DX a lot, 90% CW and favor the low bands too.  I don't do 
digital modes but that would be the only other case where I'd consider a 
special bandwidth roofing filter.


73,
Gary K9GS
 Original message From: David Bunte  Date: 
3/8/18  10:45 AM  (GMT-06:00) To: Chuck Chandler  Cc: 
elecraft@mailman.qth.net Subject: Re: [Elecraft] Planning the next filters 
Chuck -

You will likely get a wide variety of responses, and here is mine. I added
the 400 Hz filter to my main and sub receiver. I work CW almost
exclusively. I rag chew and chase some DX. I barely “dabble” in contests. I
can’t recall a single time when I thought a narrower CW filter would have
made a difference for me. It may help that my antenna is quite modest, and
I don’t have other hames near enough to impede my reception.

Best of luck as you proce d.

Dave - K9FN

On Thu, Mar 8, 2018 at 11:24 AM Chuck Chandler 
wrote:

> Right now I have the stock SSB and a 400 Hz filter in both main and sub
> rcvrs.  I would like to add some a few at a time.  My first priority is to
> add a couple to the main receiver, since it is the biggest chore to get
> to.
>
> I plan on a 250 Hz CW filter, but am going back and forth between the 2.1
> and 1.8 kHz filters.  I know that narrowing the DSP to 1.8 gives a really
> difficult to understand voice signal, while the 2.1 allows in more adjacent
> signals.  However, the roofing filters may not behave in the same manner.
> For example, the 1.8 could be set to turn on at 2.1 to take advantage of
> skirt shape.
>
> I primarily DX, and operate in some contests as well.  I know SSB contests
> really need a narrow SSB filter.
>
> Any suggestions on the matter from those who have gone this route before?
>
> 73 de Chuck, WS1L
>
> --
>
>
> ===
> Chuck Chandler
> chandler...@gmail.com
> ===
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Re: [Elecraft] Planning the next filters

[Craig Buck]

Get the 1.8 if you work ssb.  Experiment with shifting the pass band for
maximum clarity.  Youll be amazed just how narrow it can get and still be
understandable.

On Mar 8, 2018 11:24 AM, "Chuck Chandler"  wrote:

> Right now I have the stock SSB and a 400 Hz filter in both main and sub
> rcvrs.  I would like to add some a few at a time.  My first priority is to
> add a couple to the main receiver, since it is the biggest chore to get
> to.
>
> I plan on a 250 Hz CW filter, but am going back and forth between the 2.1
> and 1.8 kHz filters.  I know that narrowing the DSP to 1.8 gives a really
> difficult to understand voice signal, while the 2.1 allows in more adjacent
> signals.  However, the roofing filters may not behave in the same manner.
> For example, the 1.8 could be set to turn on at 2.1 to take advantage of
> skirt shape.
>
> I primarily DX, and operate in some contests as well.  I know SSB contests
> really need a narrow SSB filter.
>
> Any suggestions on the matter from those who have gone this route before?
>
> 73 de Chuck, WS1L
>
> --
>
>
> ===
> Chuck Chandler
> chandler...@gmail.com
> ===
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Re: [Elecraft] FT8 DXpedition Mode test.

[Stephen Shearer]

Don, OK I had to test this again and look at the manual.  I "thought" I 
tried shift but brain cells are getting old...


I used fldigi to see a nice 0-4K audio spectrum.
I went to 40m (shouldn't matter), set DATA A, set BW=4.0, Adjusted FC 
from low to high 1.28 to 1.64 with *1.5.
    FC ... If I change it over its full range the lowest it goes is 
375HZ (and that may be 10dB down?).

    If I change BW=3.0, same but High end varies.
    With BW=4.0, only high end varies.
    If I make BW=1.7, I can move low end up but not below the ~400HZ...

I have latest firmware, MCU 02.90 DSP 01.52

If I use USB...  BW=4.0 FC=*1.5  I have an audio range from 200Hz to 
3500Hz ??

I even went back and zeroed my RX EQ.
I guess I can't use DATA A with FT8 in DXpedition Mode.
It won't matter with other modes as only DXpedition mode needs RX at 
300Hz...

And I may have been the only one using a KX3 for the test?
*I think the answer is that the problem is not **with me, its firmware 
limits...*


The WSJT-X software does other "tricks" to move the TX freq keeping it 
within the TX bandpass, 1500Hz +/- 500Hz (it looked like...)  Note, not 
relative to "issue", just info.



BTW, thanks for all you do for the Elecraft community!

73, Steve WB3LGC


On 3/7/2018 1:42 PM, Don Wilhelm wrote:

Stephen,

In DATA A, use the SHIFT (PBT II) to shift the passband down.
The widest passband is 3000 Hz. which is consistent with your 400 to 
3500 Hz observation.  I suggest shifting it to 150 to 3150 Hz. It will 
work fine for most soundcard data modes.


The K3/K3S has the same behavior, but it is not a problem.

73,
Don W3FPR

On 3/7/2018 11:47 AM, Stephen Shearer wrote:


8.   My KX3 with "Data A" has a wide bandpass of 400Hz to 3500Hz and
    shifting the RX down was not going to work with the software shift
    for the report, I "guess"...
9.   I changed my KX3 to USB, removed CMP and RX/TX audio EQ. The
    lower RX cut-off would receive the FOX on the assigned freq.
10.   I looked at the KX3 manual C5 for a way to set the passband low
    end cutoff while in Data A mode.  Nothing found.  Does the K3s have
    the same problem?




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Re: [Elecraft] key out port

[hawley, charles j jr]

http://www.elecraft.com/manual/K3_Schematics_Jun_2010.pdf

Chuck Jack

Sent from my iPhone, cjack

On Mar 8, 2018, at 10:18 AM, Don Wilhelm 
> wrote:

Shel,

It seems the K3 schematics have disappeared from the Elecraft website, but the 
K3S schematics are listed - and should be adequate for that problem.

I do have the K3 schematics, and if that will help, send me a private email 
(take Elecraft out of the subject line) and I can send the file to you - The 
reflector does not allow attachments.

73,
Don W3FPR

On 3/8/2018 8:36 AM, Shel Sherman wrote:
I cannot get the key out port to pull to ground using the internal keyer  I
have no gate signal change when pulsing the keyer  I cannot find the
schematic so I can trace back to the keyer outlying order to find the break
 help appreciated  call 314/580/3566
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Re: [Elecraft] Planning the next filters

[David Bunte]

Chuck -

You will likely get a wide variety of responses, and here is mine. I added
the 400 Hz filter to my main and sub receiver. I work CW almost
exclusively. I rag chew and chase some DX. I barely “dabble” in contests. I
can’t recall a single time when I thought a narrower CW filter would have
made a difference for me. It may help that my antenna is quite modest, and
I don’t have other hames near enough to impede my reception.

Best of luck as you proce d.

Dave - K9FN

On Thu, Mar 8, 2018 at 11:24 AM Chuck Chandler 
wrote:

> Right now I have the stock SSB and a 400 Hz filter in both main and sub
> rcvrs.  I would like to add some a few at a time.  My first priority is to
> add a couple to the main receiver, since it is the biggest chore to get
> to.
>
> I plan on a 250 Hz CW filter, but am going back and forth between the 2.1
> and 1.8 kHz filters.  I know that narrowing the DSP to 1.8 gives a really
> difficult to understand voice signal, while the 2.1 allows in more adjacent
> signals.  However, the roofing filters may not behave in the same manner.
> For example, the 1.8 could be set to turn on at 2.1 to take advantage of
> skirt shape.
>
> I primarily DX, and operate in some contests as well.  I know SSB contests
> really need a narrow SSB filter.
>
> Any suggestions on the matter from those who have gone this route before?
>
> 73 de Chuck, WS1L
>
> --
>
>
> ===
> Chuck Chandler
> chandler...@gmail.com
> ===
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Re: [Elecraft] key out port

[Joe Subich, W4TV]

The K3 schematics are on the web site:
  http://www.elecraft.com/manual/K3_Schematics_Jun_2010.pdf


73,

   ... Joe, W4TV


On 3/8/2018 10:57 AM, Don Wilhelm wrote:

Shel,

It seems the K3 schematics have disappeared from the Elecraft website, 
but the K3S schematics are listed - and should be adequate for that 
problem.


I do have the K3 schematics, and if that will help, send me a private 
email (take Elecraft out of the subject line) and I can send the file to 
you - The reflector does not allow attachments.


73,
Don W3FPR

On 3/8/2018 8:36 AM, Shel Sherman wrote:
I cannot get the key out port to pull to ground using the internal 
keyer  I

have no gate signal change when pulsing the keyer  I cannot find the
schematic so I can trace back to the keyer outlying order to find the 
break

  help appreciated  call 314/580/3566

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Re: [Elecraft] key out port

[GRANT YOUNGMAN]

There are K3 schematics at 
http://www.elecraft.com/manual/K3_Schematics_Jun_2010.pdf 


Some of the modules in this package are a bit out of date (later than 2010), so 
the K3S docs may be needed, too, depending …

Grant NQ5T
K3 #2091, KX3 #8342



On Mar 8, 2018, at 10:57 AM, Don Wilhelm  wrote:
> 
> Shel,
> 
> It seems the K3 schematics have disappeared from the Elecraft website, but 
> the K3S schematics are listed - and should be adequate for that problem.
> 
> I do have the K3 schematics, and if that will help, send me a private email 
> (take Elecraft out of the subject line) and I can send the file to you - The 
> reflector does not allow attachments.
> 
> 73,
> Don W3FPR
> 
> On 3/8/2018 8:36 AM, Shel Sherman wrote:
>> I cannot get the key out port to pull to ground using the internal keyer  I
>> have no gate signal change when pulsing the keyer  I cannot find the
>> schematic so I can trace back to the keyer outlying order to find the break
>>  help appreciated  call 314/580/3566
> __
> 




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[Elecraft] Planning the next filters

[Chuck Chandler]

Right now I have the stock SSB and a 400 Hz filter in both main and sub
rcvrs.  I would like to add some a few at a time.  My first priority is to
add a couple to the main receiver, since it is the biggest chore to get
to.

I plan on a 250 Hz CW filter, but am going back and forth between the 2.1
and 1.8 kHz filters.  I know that narrowing the DSP to 1.8 gives a really
difficult to understand voice signal, while the 2.1 allows in more adjacent
signals.  However, the roofing filters may not behave in the same manner.
For example, the 1.8 could be set to turn on at 2.1 to take advantage of
skirt shape.

I primarily DX, and operate in some contests as well.  I know SSB contests
really need a narrow SSB filter.

Any suggestions on the matter from those who have gone this route before?

73 de Chuck, WS1L

-- 


===
Chuck Chandler
chandler...@gmail.com
===
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Re: [Elecraft] key out port

[Don Wilhelm]

Shel,

It seems the K3 schematics have disappeared from the Elecraft website, 
but the K3S schematics are listed - and should be adequate for that problem.


I do have the K3 schematics, and if that will help, send me a private 
email (take Elecraft out of the subject line) and I can send the file to 
you - The reflector does not allow attachments.


73,
Don W3FPR

On 3/8/2018 8:36 AM, Shel Sherman wrote:

I cannot get the key out port to pull to ground using the internal keyer  I
have no gate signal change when pulsing the keyer  I cannot find the
schematic so I can trace back to the keyer outlying order to find the break
  help appreciated  call 314/580/3566

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Re: [Elecraft] K3 Utility

[Harlan Sherriff via Elecraft]

Solved. 
 I am using a 10 point USB hub and somehow the comm port number changed.

Sent from my iPhone

> On Mar 8, 2018, at 9:37 AM, Harlan Sherriff via Elecraft 
>  wrote:
> 
> Does the utility save any info in Windows registry?
> 
> I opened the utility to check for firmware. As soon as I opened it, I 
> received the “K3 waiting for firmware load.” message. 
> 
> I was unable to get anywhere using info from the help file, so connected the 
> K3 to another computer and all was FB. 
> 
> I tried the original computer with the K3 disconnected but got the same error 
> message. 
> 
> I have tried everything I can think of to correct the problem with the first 
> computer: rebooted the computer, uninstalled the utility and reinstalled the 
> latest utility rev, changed the port the K3 connects to. 
> 
> My thought is that the utility must save some setting in the Win registry 
> that doesn’t get cleaned out when uninstalling the utility. 
> 
> I can keep my K3 up to date using the second computer, but sure would be nice 
> to be able to use the normal computer. 
> 
> Any ideas?  
> Harlan 
> K4HES 
> 
> Sent from my iPhone
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[Elecraft] K3 Utility

[Harlan Sherriff via Elecraft]

Does the utility save any info in Windows registry?

I opened the utility to check for firmware. As soon as I opened it, I received 
the “K3 waiting for firmware load.” message. 

I was unable to get anywhere using info from the help file, so connected the K3 
to another computer and all was FB. 

I tried the original computer with the K3 disconnected but got the same error 
message. 

I have tried everything I can think of to correct the problem with the first 
computer: rebooted the computer, uninstalled the utility and reinstalled the 
latest utility rev, changed the port the K3 connects to. 

My thought is that the utility must save some setting in the Win registry that 
doesn’t get cleaned out when uninstalling the utility. 

I can keep my K3 up to date using the second computer, but sure would be nice 
to be able to use the normal computer. 

Any ideas?  
Harlan 
K4HES 

Sent from my iPhone
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Re: [Elecraft] KX2 Jacks

[Don Wilhelm]

Adrian,

That information is in the KX2 manual.  Download it if you do not have a 
printed one.


Power - 2.1mm/5.5mm coaxial plug - see page 5 of the manual.

Phones - 3.5mm stereo (TRS) - see page 8 of the manual.

MIC - 3.5mm TRRS - see page 8 of the manual, but a TRS can be used if 
MIC BTN is turned off in the menu - See MIC BTN menu entry on page 46.


ACC - 3.5mm TRS unless KeyOut is required, then a TRRS, see page 9 of 
the manual.


73,
Don W3FPR

On 3/8/2018 8:56 AM, Adrian Young wrote:

Hi all. I’m wondering could some kind person tell me what diameter and the 
number of poles the ACC, KEY, PHONES, MIC jacks are. And the sizes for the 
power jack also.


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Re: [Elecraft] PTT-ERR

[Don Wilhelm]

Larry,

I doubt that this is a firmware caused problem, but would rather think 
it is something that has been gradually failing and got worse about the 
time you loaded the new firmware.
ERR PTT normally is indicated when PTT is active during a power on, but 
yours seems to be different, and may be related to the KIO3 module - see 
the error code "Troubleshooting steps" for that error on page 69 of the 
K3 manual.


I would suggest removing the KIO3 and its digital I/O daughter board and 
then plugging them back in which will remove oxidation from the contact 
pins.  See the K3 assembly manual to see how it was assembled - reverse 
the assembly steps to remove.


73,
Don W3FPR

On 3/8/2018 8:48 AM, Larry Boekeloo wrote:

Hi everyone,
Since I upgraded the software on my K3 last time, I would get PTT-ERR messages 
when using FSK/RTTY every now and then.
Now it seems to be happening during a RTTY transmission.  I know there were 
some changes in the K3 software but I can't figure out how fix this issue.
I'm using a RigExpert TI-5 interface which is connected to the computer via USB 
and then to the K3 with their interface cable(s).  I'm using MMTTY with 
Hamscope for my software.  It always worked great previously to this last 
upgrade.
Any thoughts or ideas?

Thanks.
Larry, KN8N

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[Elecraft] PTT-ERR

[Larry Boekeloo]

Hi everyone,
Since I upgraded the software on my K3 last time, I would get PTT-ERR messages 
when using FSK/RTTY every now and then.
Now it seems to be happening during a RTTY transmission.  I know there were 
some changes in the K3 software but I can't figure out how fix this issue.
I'm using a RigExpert TI-5 interface which is connected to the computer via USB 
and then to the K3 with their interface cable(s).  I'm using MMTTY with 
Hamscope for my software.  It always worked great previously to this last 
upgrade.
Any thoughts or ideas?

Thanks.
Larry, KN8N

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[Elecraft] KX2 Jacks

[Adrian Young]

Hi all. I’m wondering could some kind person tell me what diameter and the 
number of poles the ACC, KEY, PHONES, MIC jacks are. And the sizes for the 
power jack also. 

Thanks

Adrian
MM0TAI 

Sent from my iPhone
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[Elecraft] key out port

[Shel Sherman]

I cannot get the key out port to pull to ground using the internal keyer  I
have no gate signal change when pulsing the keyer  I cannot find the
schematic so I can trace back to the keyer outlying order to find the break
 help appreciated  call 314/580/3566

Shel Sherman. Wo0c
-- 
Shel Sherman
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Re: [Elecraft] KPA1500 ... ATU tune cycle must be initiated manually since key line interrupter is installed

[dick]

I’d encourage a stereo Y ¼” adapter. You don’t want to connect tip to ring at 
the KPA1500.

 

Something like this:

 

https://www.amazon.com/Stereo-Y-Adapter-Single-Male-Female/dp/B00FE089DQ

 

I have some solid Y phone adapters, but they may not work as well when the K3 
front is lifted by its tilt stand.

 

Actually I’ve put my K3 on a shelf and now use a K-Pod near the keyboard so I’m 
not constantly twisting the VFO knob on the K3.

 

73 de Dick, K6KR

 

 

From: Don Butler  
Sent: Wednesday, March 7, 2018 21:40
To: d...@elecraft.com; elecraft@mailman.qth.net
Subject: RE: [Elecraft] KPA1500 ... ATU tune cycle must be initiated manually 
since key line interrupter is installed

 

Tnx Dick …. Sounds like that will work … I’ll take a close look at it …. The 
big microHam cable assembly between MK2R+ and K3 is currently using the K3 
straight key jack but I should be able to make a Y adapter to run both lines in 
….

 

Don 

 

Sent from Mail   for Windows 10

 

From: d...@elecraft.com  
Sent: Wednesday, March 7, 2018 7:02 PM
To: 'Don Butler'  ; elecraft@mailman.qth.net 
 
Subject: RE: [Elecraft] KPA1500 ... ATU tune cycle must be initiated manually 
since key line interrupter is installed

 

You might run a cable from the KPA1500 back panel TUNE connector to the K3 
straight key input.  The KPA1500 pulls the tip of the connector low when it 
needs to do an ATU tune (because you pressed the ATU TUNE button, or we're 
doing an "swr-initiated" tune.  I use a 3.5mm TRS plug to plug (the green kind 
from lots of computer sound cards), and a 3.5mm to 1/4" stereo adapter that 
plugs into the K3 straight key line.

 

I may have missed the thrust of your question, but this is how I cause my K3 to 
provide carrier for ATU tuning when needed.

 

73 de Dick, K6KR

 

 

 

 

-Original Message-

From: elecraft-boun...@mailman.qth.net  > On Behalf Of Don Butler

Sent: Wednesday, March 7, 2018 17:17

To: elecraft@mailman.qth.net  

Subject: [Elecraft] KPA1500 ... ATU tune cycle must be initiated manually since 
key line interrupter is installed

 

I’m just getting to know my new KPA1500 and am having a ball doing so …. it is 
a gem!one minor problem:  I’m using the key line interrupter in the Aux 
cable since I am keying through a microHam MK2R+ (the K3S/KPA1500 is one of two 
radios connected through the MK2R+ ….. so the key line must now run from K3 to 
MK2R+ to KPA1500).   Without the direct keyline connection between K3 and amp I 
must manually key the K3 to initiate an ATU tune cycle  ….  I suspect that the 
same problem would exist if I were using a KPA500  …. How have KPA500 users 
been working around this?

 

Don, N5LZ

 

 

 

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