Re: [Elecraft] IFR1500 Service Monitor For Sale

[G4GNX]

Yeah, but where do you put the stopwatch to measure the RF? :-D

73,

Alan. G4GNX

-Original Message- 
From: EricJ 
Sent: Friday, March 9, 2018 1:58 AM 
To: elecraft@mailman.qth.net 
Subject: Re: [Elecraft] IFR1500 Service Monitor For Sale 

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


Eric KE6US

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

[Johan Ymerson]

On Thursday, 8 March 2018 23:38:22 CET Mike Markowski wrote:
> 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.  :-)

You see, these hobbies go well together! 
An you can always find the need for it somewhere, if you look hard enough ;-)

73 de SM0XHJ

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Re: [Elecraft] 1.8 kHz SSB Filter

[Kjeld Holm]

Agree
And just want to tell you that I am using Filter width=1500 and Filter=750. 
Vy 73 de OZ1CCM 

-Original Message-
From: elecraft-boun...@mailman.qth.net 
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bill Johnson
Sent: 9. marts 2018 02:36
To: Elecraft List
Subject: Re: [Elecraft] 1.8 kHz SSB Filter

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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[Elecraft] Cable for KX2 and KPXA-100

[Tim N9PUZ]

I have a KX2/KPXA-100 combination. I'd like to be able to physically
separate the two more than the factory supplied cables will allow. Any
problems with adding a 2 or 3 foot extension to the KX2ACBL data/control
cable that runs between the two?

Tim / N9PUZ
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Re: [Elecraft] Planning the next filters

[Raymond Sills]

And isn't it the case that the SignaLink is a 16 bit device?  That Tascam 
US 100 is also 16 bits, but it has been replaced by a model that has 24 bit/96 
KHz sampling.. indicating a high quality interface.

73 de Ray
K2ULR
KX3 #211



-Original Message-
From: Jim Brown 
To: elecraft 
Sent: Fri, Mar 9, 2018 1:41 am
Subject: Re: [Elecraft] Planning the next filters

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] New KPA1500 feature: ATU TUNE integration with K3 and K3S transceivers

[K8TE]

Even though I am impatiently awaiting my KPA1500, I would really like this
feature for my KPA500 too!

73, Bill, K8TE



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Re: [Elecraft] Planning the next filters

[Johan Ymerson]

Yes, the Signalink USB is 16-bit from what I remember. But on the other hand 
alost all rigs have a 16-bit audio DAC so that will be the limiting factor 
anyway (with K3 being the exception with a 24-bit DAC).
 
Probably the biggest problem with the Signalink USB is not the interface 
itself, but the Windows builtin drivers for the ADC. It thinks the ADC is a 
microphone and add +30 dB of gain in software. So those 16 bit's are quickly 
reduced to 6 bits if you are not careful. There are some descriptions (it 
isn't obvious, it is not visible in the normal mixer controls) on the net how 
to set the gain to (almost) 0 dB, but I use Linux so I haven't tried.

/Johan

On Friday, 9 March 2018 15:18:09 CET Raymond Sills wrote:
> And isn't it the case that the SignaLink is a 16 bit device?  That
> Tascam US 100 is also 16 bits, but it has been replaced by a model that has
> 24 bit/96 KHz sampling.. indicating a high quality interface.
> 
> 73 de Ray
> K2ULR
> KX3 #211
> 
> 
> 
> -Original Message-
> From: Jim Brown 
> To: elecraft 
> Sent: Fri, Mar 9, 2018 1:41 am
> Subject: Re: [Elecraft] Planning the next filters
> 
> 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

[Joe Subich, W4TV]

Probably the biggest problem with the Signalink USB is not the 
interface itself, but the Windows builtin drivers for the ADC. It 
thinks the ADC is a microphone and add +30 dB of gain in software.

That issue is not with Windows ... it is with the device maker who
has selected a device that identifies as microphone level.  Using
the proper device/device ID will cause Windows to see it as a line
level input and set the drivers correctly.

73,

   ... Joe, W4TV


On 3/9/2018 10:05 AM, Johan Ymerson wrote:

Yes, the Signalink USB is 16-bit from what I remember. But on the other hand
alost all rigs have a 16-bit audio DAC so that will be the limiting factor
anyway (with K3 being the exception with a 24-bit DAC).
  
Probably the biggest problem with the Signalink USB is not the interface

itself, but the Windows builtin drivers for the ADC. It thinks the ADC is a
microphone and add +30 dB of gain in software. So those 16 bit's are quickly
reduced to 6 bits if you are not careful. There are some descriptions (it
isn't obvious, it is not visible in the normal mixer controls) on the net how
to set the gain to (almost) 0 dB, but I use Linux so I haven't tried.

/Johan

On Friday, 9 March 2018 15:18:09 CET Raymond Sills wrote:

And isn't it the case that the SignaLink is a 16 bit device?  That
Tascam US 100 is also 16 bits, but it has been replaced by a model that has
24 bit/96 KHz sampling.. indicating a high quality interface.

73 de Ray
K2ULR
KX3 #211



-Original Message-
From: Jim Brown 
To: elecraft 
Sent: Fri, Mar 9, 2018 1:41 am
Subject: Re: [Elecraft] Planning the next filters

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] BNC connector oddity on KX3

[Ignacy]

I use many BNC connectors, some at KW level, and nearly all of them are good.
But occasionally some do not make a good contact and need to be thrown away
ASAP. The best way to check is to try another cable. 

Recently I bought a large number of cheap RG-58 cables with BNC connectors
from showmecables.com.  The cables turned out to be 60 Ohm and many
connectors are poor. 
 
I like cables at hamfests from old professional equipment. 

Ignacy, NO9E



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[Elecraft] KX3 + 2m transverter + JT65

[phil]

Hi Everyone,

I've just joined the list to ask a quick question - Is there anyone here 
who has actually tried 2m JT65 using a KX3 with the 2m transverter module?


I understand that due to the KX3 temperature compensation system 
correcting drift in steps, that JT56 may not work on 2m, although I've 
been unable to find any reference to someone having actually just tried 
it to see if it works.


And if it doesn't work, if there are any workarounds - e.g. would 
operating the radio with the case open and a fan cooling the RF board 
help the situation?


I'm keen to have a go at EME and apart from this issue have everything I 
need sorted out, so I'm hoping this issue isn't going to be a deal-breaker.


Phil G4PWO


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[Elecraft] KX2/3 Going to DATA mode

[Jeffrey M. Swiger]

Hey All, 
Been just starting with PACTOR and Winlink/Airmail.
When letting the PTC-IIIUSB control the KX2 that part is Fine,
But I need the Radio to use USB and it keep going to DATA mode.
IS there a way to stop it, or HOW do I stop it from going to DATA mode?
Software for other pieces of this seem fine, But for Some
Reason 2 want to send DATA MODE, but just like to LOCK that part so
this can be done Remotely.
THANKS
Jeff-N8NOE
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[Elecraft] KEY OUT LOOP

[Shel Sherman]

Sent from Mail for Windows 10
I am missing the signal on the gate of Q5 when the internal keyer is activated.
Can anyone show me the path through the schematics so I can locate where the 
signal gets Shel  WO0C
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Re: [Elecraft] Planning the next filters

[Johan Ymerson]

On Friday, 9 March 2018 16:29:19 CET Joe Subich, W4TV wrote:
> > Probably the biggest problem with the Signalink USB is not the
> > interface itself, but the Windows builtin drivers for the ADC. It
> > thinks the ADC is a microphone and add +30 dB of gain in software.
> 
> That issue is not with Windows ... it is with the device maker who
> has selected a device that identifies as microphone level.  Using
> the proper device/device ID will cause Windows to see it as a line
> level input and set the drivers correctly.
> 

That can be debated, no other OS (MacOS/Linux/*BSD) identifies it as a 
microphone. And why is there no clear option to enable/disable the "software 
pre-amp" in Windows?

On the filter discussion; I have (apart from FM filter) 2.8 KHz filters and 
400 Hz filters. Very pleased with that. I am not a contester so I want the 
full SSB bandwidth, mainly for waterfall view in digital modes. 2.8 KHz 
because I couldn't be bothered with filter matching in main and sub 
receiver...
400 Hz is kind of the smallest BW usable for digital modes anyway. If you want 
to go tighter than that (for CW or possibly PSK31), use the DSP filter is my 
advice. 

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

[ktalbott]

Mine is in the mail. $12.70 shipped via 3D Hubs.

-Original Message-
From: elecraft-boun...@mailman.qth.net  On
Behalf Of Johan Ymerson
Sent: Friday, March 9, 2018 3:54 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] 3D-print case for KXPD2

On Thursday, 8 March 2018 23:38:22 CET Mike Markowski wrote:
> 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.  :-)

You see, these hobbies go well together! 
An you can always find the need for it somewhere, if you look hard enough
;-)

73 de SM0XHJ

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Re: [Elecraft] BNC connector oddity on KX3

[rich hurd WC3T]

I've pretty much exhausted most of the permutations of my cables and
connectors.  The only persistent behavior is that if I apply slight
pressure to the side of the BNC connector where it plugs into the jack on
the KX3, or sometimes if I twist it and then apply slight pressure just so,
I see a jump in the noise floor and instead of the internal ATU wearing
itself out and giving up with a 9:1 or 7:1 SWR, it immediately tunes to 1.0
or 1.1.   I have removed/swapped all my the antenna leads.  I have four of
them, all Cables On Demand (Amphenol) manufacture.  I also have a number of
BNC to banana plug jacks, and even an MFJ-1899T.  If I replace the leads
without doing the twisting-and-slight-pressure thing, I lose the RF
connection; the S meter has no indications on it, and the noise floor is
nonexistent.

As the old saw goes "The only common thing about all of your dysfunctional
relationships... is you."   I can extrapolate that to "the only common
thing about all my poor connections is the BNC jack on the KX3."   Yes, I
have cracked the case, confirmed that all connections are firmly seated;
all mechanical connections are sound and tightly made.  I have a jeweler's
screwdriver that I have used to slightly bend the female 'fingers' in for a
better contact as well;  they bend inward, and then spring back into place
again.

It's about time to consider a new jack.  Frustrating, but I've now spent
three or so hours finagling this and given the bench rate of an RF tech,
I'm wasting money (and time.)

On Fri, Mar 9, 2018 at 10:32 AM, Ignacy  wrote:

> I use many BNC connectors, some at KW level, and nearly all of them are
> good.
> But occasionally some do not make a good contact and need to be thrown away
> ASAP. The best way to check is to try another cable.
>
> Recently I bought a large number of cheap RG-58 cables with BNC connectors
> from showmecables.com.  The cables turned out to be 60 Ohm and many
> connectors are poor.
>
> I like cables at hamfests from old professional equipment.
>
> Ignacy, NO9E
>
>
>
> --
> Sent from: http://elecraft.365791.n2.nabble.com/
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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] BNC connector oddity on KX3

[Johan Ymerson]

Unfortunately there are some really crappy (cheap) BNC connectors out there, 
some with too large centre pins. Using one of those even once may be enought 
to damage the female side :-(
So when you get a new female for your KX3, have a look at all your cables and 
adapters and make sure all of them are good quality.

73 de Johan, SM0XHJ

On Friday, 9 March 2018 17:13:58 CET rich hurd WC3T wrote:
> I've pretty much exhausted most of the permutations of my cables and
> connectors.  The only persistent behavior is that if I apply slight
> pressure to the side of the BNC connector where it plugs into the jack on
> the KX3, or sometimes if I twist it and then apply slight pressure just so,
> I see a jump in the noise floor and instead of the internal ATU wearing
> itself out and giving up with a 9:1 or 7:1 SWR, it immediately tunes to 1.0
> or 1.1.   I have removed/swapped all my the antenna leads.  I have four of
> them, all Cables On Demand (Amphenol) manufacture.  I also have a number of
> BNC to banana plug jacks, and even an MFJ-1899T.  If I replace the leads
> without doing the twisting-and-slight-pressure thing, I lose the RF
> connection; the S meter has no indications on it, and the noise floor is
> nonexistent.
> 
> As the old saw goes "The only common thing about all of your dysfunctional
> relationships... is you."   I can extrapolate that to "the only common
> thing about all my poor connections is the BNC jack on the KX3."   Yes, I
> have cracked the case, confirmed that all connections are firmly seated;
> all mechanical connections are sound and tightly made.  I have a jeweler's
> screwdriver that I have used to slightly bend the female 'fingers' in for a
> better contact as well;  they bend inward, and then spring back into place
> again.
> 
> It's about time to consider a new jack.  Frustrating, but I've now spent
> three or so hours finagling this and given the bench rate of an RF tech,
> I'm wasting money (and time.)
> 

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Re: [Elecraft] KX2/3 Going to DATA mode

[Nr4c]

Why do you need USB?

It is a data mode so DATA A seems appropriate. 

Should be a string in software config. Look for Radio Mode selection. 

Sent from my iPhone
...nr4c. bill


> On Mar 9, 2018, at 10:43 AM, Jeffrey M. Swiger  wrote:
> 
> Hey All, 
>Been just starting with PACTOR and Winlink/Airmail.
> When letting the PTC-IIIUSB control the KX2 that part is Fine,
> But I need the Radio to use USB and it keep going to DATA mode.
> IS there a way to stop it, or HOW do I stop it from going to DATA mode?
>Software for other pieces of this seem fine, But for Some
> Reason 2 want to send DATA MODE, but just like to LOCK that part so
> this can be done Remotely.
> THANKS
> Jeff-N8NOE
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Re: [Elecraft] USB Audio CODEC (Was: Planning the next filters)

[Joe Subich, W4TV]

On 3/9/2018 11:00 AM, Johan Ymerson wrote:
> And why is there no clear option to enable/disable the "software
> pre-amp" in Windows?

With the current drivers in Windows 10, disabling the preamp is
automatic.  One configures the level control in the Sound Control
Panel (Recording) to display in dB ... any setting above 0 dB
enables the preamp, any setting below 0 dB disables the preamp.

I assume the change had propagated to Windows 8.1 before it ended
mainstream support in January but I would not expect it in Windows
XP, NT, 2000 or any other version of Windows that has been out of
"mainstream" support for several years (obsolete).

73,

   ... Joe, W4TV


On 3/9/2018 11:00 AM, Johan Ymerson wrote:

On Friday, 9 March 2018 16:29:19 CET Joe Subich, W4TV wrote:

Probably the biggest problem with the Signalink USB is not the
interface itself, but the Windows builtin drivers for the ADC. It
thinks the ADC is a microphone and add +30 dB of gain in software.


That issue is not with Windows ... it is with the device maker who
has selected a device that identifies as microphone level.  Using
the proper device/device ID will cause Windows to see it as a line
level input and set the drivers correctly.



That can be debated, no other OS (MacOS/Linux/*BSD) identifies it as a
microphone. And why is there no clear option to enable/disable the "software
pre-amp" in Windows?

On the filter discussion; I have (apart from FM filter) 2.8 KHz filters and
400 Hz filters. Very pleased with that. I am not a contester so I want the
full SSB bandwidth, mainly for waterfall view in digital modes. 2.8 KHz
because I couldn't be bothered with filter matching in main and sub
receiver...
400 Hz is kind of the smallest BW usable for digital modes anyway. If you want
to go tighter than that (for CW or possibly PSK31), use the DSP filter is my
advice.

/Johan
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Re: [Elecraft] KX2/3 Going to DATA mode

[Walter Underwood]

For PACTOR and Winlink, you should use DATA A mode. That disables TX EQ, RX EQ, 
and compression.

Why do you think you need USB?

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

> On Mar 9, 2018, at 7:43 AM, Jeffrey M. Swiger  > wrote:
> 
> Hey All, 
>   Been just starting with PACTOR and Winlink/Airmail.
> When letting the PTC-IIIUSB control the KX2 that part is Fine,
> But I need the Radio to use USB and it keep going to DATA mode.
> IS there a way to stop it, or HOW do I stop it from going to DATA mode?
>   Software for other pieces of this seem fine, But for Some
> Reason 2 want to send DATA MODE, but just like to LOCK that part so
> this can be done Remotely.
> THANKS
> Jeff-N8NOE
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Re: [Elecraft] 1.8 kHz SSB Filter

[Jim Low man]

Maybe I missed it, but there once was a link on the Elecraft website with 
filter recommendations.

73 de Jim-AD6CW 

> On Mar 9, 2018, at 4:11 AM, Kjeld Holm  wrote:
> 
> Agree
> And just want to tell you that I am using Filter width=1500 and Filter=750. 
> Vy 73 de OZ1CCM 
> 
> -Original Message-
> From: elecraft-boun...@mailman.qth.net 
> [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bill Johnson
> Sent: 9. marts 2018 02:36
> To: Elecraft List
> Subject: Re: [Elecraft] 1.8 kHz SSB Filter
> 
> 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] K2 kit building problem

[Gordon LaPoint]

Just got the new Q6 from Elecraft, installed it, and have power out!!!  
Now to finish the alignment and get the K2 on the air!

Looks like lots of fun ahead!
Thanks!!
Gordon - N1MGO

On 3/4/2018 4:20 PM, Don Wilhelm wrote:

Gordon,

That amount of RF is about (with 800mV on the Q5 collector).

I am close to agreeing with you about a bad Q6, but do the checks I 
mentioned anyway.


If you do find out Q6 is the culprit -- if this is a kit less than 1 
year old, contact support@elecraft and ask for a replacement.
If more than 1 year old (or you were not the original purchaser), it 
is not under warranty and you will have to pay for the part - contact 
the sales office to do that (make sure you have the part number 
handy). They will need payment information.  The phone number is 
831-763-4211.
The minimum parts order is $5.  Get a replacement for Q10 at the same 
time, just in case.


73,
Don W3FPR

On 3/4/2018 3:39 PM, Gordon LaPoint wrote:

Don,
   I have about 220mv P-P on the base of Q6.  I'm off to check 
all the components in the base ckt of Q6, with just DC on the 
collector. This is in Tune with the Power out set to 2W.


Thanks,
Gordon - N1MGO

On 3/4/2018 3:10 PM, Don Wilhelm wrote:

Gordon,

It is doubtful (but possible) that Q6 is bad.  Did it overheat when 
you powered up? - if it did, you would most likely have seen a wisp 
of smoke.


How large is the signal at the base of Q6 when you have 800mV P-P on 
the collector of Q5?


The base voltage on Q6 is higher than normal, it should be around 
1.1 volts.  I would suggest you check all components in the base 
circuit of Q6 first.


73,
Don W3FPR
age delivered to donw...@embarqmail.com



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Re: [Elecraft] Planning the next filters

[Jim Brown]

Bits is not the issue with interfaces for digital modes -- encode/decode 
uses the 48 kHz 16 bit stream, and K1JT says that's plenty good enough. 
What matters is the quality of the A/D and the analog electronics, and 
that's where the Signalink falls down.  Higher bit rates and depths DO 
matter when using an interface for a spectrum display.  N8LP has long 
recommended the ASUS Xonar U5 and U7 for use with his LP-Pan, although 
I've heard of hardware failures with the U7.


73, Jim K9YC

On 3/9/2018 6:18 AM, Raymond Sills wrote:

And isn't it the case that the SignaLink is a 16 bit device?  That Tascam 
US 100 is also 16 bits, but it has been replaced by a model that has 24 bit/96 
KHz sampling.. indicating a high quality interface.



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Re: [Elecraft] KX2/3 Going to DATA mode

[Don Wilhelm]

Jeff,

I think that is a question to be asked of the support group for the 
software application you are using - it is what is putting the KX2/KX3 
into DATA mode.


73,
Don W3FPR

On 3/9/2018 10:43 AM, Jeffrey M. Swiger wrote:

Hey All,
Been just starting with PACTOR and Winlink/Airmail.
When letting the PTC-IIIUSB control the KX2 that part is Fine,
But I need the Radio to use USB and it keep going to DATA mode.
IS there a way to stop it, or HOW do I stop it from going to DATA mode?

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Re: [Elecraft] KEY OUT LOOP

[Don Wilhelm]

Shel,

The "signal" at the gate of Q5 is a result of the 7R voltage going to 
zero.  There are many places in the K3 that use that voltage rail for 
power during receive.
Does the receiver work?  If so, there are many devices working properly 
on that 7R voltage rail, and you will have to find out why it is not 
getting to the gate of Q5.
Do a "FIND" in the .pdf of the schematic to see all the references to 7R 
and that should enable you to trace the path.  All the 7R points are 
connected together.


73,
Don W3FPR

On 3/9/2018 10:57 AM, Shel Sherman wrote:



Sent from Mail for Windows 10
I am missing the signal on the gate of Q5 when the internal keyer is activated.
Can anyone show me the path through the schematics so I can locate where the 
signal gets Shel  WO0C

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Re: [Elecraft] Planning the next filters

[GRANT YOUNGMAN]

I have — or rather, had —  a U7.  It’s a nice interface, worked well, save for 
one thing.  I left it hooked up for a few hours one afternoon,  and while I was 
off doing something else it apparently failed and tried to draw enough current 
that it fried a USB port and other goodies on my Mac.  No clue why, but I 
relegated it to the “lessons learned” pile.  Had to have the MacBook Pro logic 
board swapped out, which is no small thing.

> On Mar 9, 2018, at 2:26 PM, Jim Brown  wrote:
> 
> Bits is not the issue with interfaces for digital modes -- encode/decode uses 
> the 48 kHz 16 bit stream, and K1JT says that's plenty good enough. What 
> matters is the quality of the A/D and the analog electronics, and that's 
> where the Signalink falls down.  Higher bit rates and depths DO matter when 
> using an interface for a spectrum display.  N8LP has long recommended the 
> ASUS Xonar U5 and U7 for use with his LP-Pan, although I've heard of hardware 
> failures with the U7.
> 
> 

Grant NQ5T
K3 #2091, KX3 #8342



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Re: [Elecraft] 1.8 kHz SSB Filter

[hawley, charles j jr]

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

Chuck KE9UW
c-haw...@illinois.edu

Sent from my iPad

On Mar 9, 2018, at 12:54 PM, Jim Low man 
mailto:jmlow...@sbcglobal.net>> wrote:


Maybe I missed it, but there once was a link on the Elecraft website with 
filter recommendations.

73 de Jim-AD6CW

On Mar 9, 2018, at 4:11 AM, Kjeld Holm 
mailto:k...@kh-translation.dk>> wrote:

Agree
And just want to tell you that I am using Filter width=1500 and Filter=750.
Vy 73 de OZ1CCM

-Original Message-
From: elecraft-boun...@mailman.qth.net 
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bill Johnson
Sent: 9. marts 2018 02:36
To: Elecraft List
Subject: Re: [Elecraft] 1.8 kHz SSB Filter

Yes!

73,
Bill
K9YEQ

-Original Message-
From: elecraft-boun...@mailman.qth.net 
mailto:elecraft-boun...@mailman.qth.net>> On 
Behalf Of Bob McGraw K4TAX
Sent: Thursday, March 8, 2018 7:22 PM
To: Elecraft List mailto:elecraft@mailman.qth.net>>
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 Buckmailto:radiok...@gmail.com>>
To: Chuck Chandlermailto:chandler...@gmail.com>> 
Cc:elecraft@mailman.qth.net
Subject: Re: [Elecraft] Planning the next filters
Message-ID:
  
mailto:caaq9xabk9igcpbvmb8ognzxnmj0h1k2x87f1dx1fjsczk_p...@mail.gmail.com>>
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"mailto:chandler...@gmail.com>>  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] KPA 1500 shipping time question

[David Smith]

Looking at placing my KPA1500 order is this month.  Have several friends who 
placed their order in August and got theirs about 3-4 weeks ago and see other 
patiently waiting.  Anyone have any info of shipping time frame if one ordered 
now as they ramp up production?

Thanks  -  David  -  ND4Y

Sent from Mail for Windows 10

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[Elecraft] any KPA500 available

[Jamie WW3S]

with the new amp shipping, whats the going price for a KPA500? Any good clean 
gently used ones available
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Re: [Elecraft] KPA 1500 shipping time question

[Don Wilhelm]

David,

That all depends on how fast they can ramp up to production in 
Watsonville, but my current guess is about 3 months.
See the KPA1500 shipping status for the latest information (no, it does 
not have my guess listed).

Eric will likely correct me if my guess is way out of line.

73,
Don W3FPR

On 3/9/2018 4:35 PM, David Smith wrote:

Looking at placing my KPA1500 order is this month.  Have several friends who 
placed their order in August and got theirs about 3-4 weeks ago and see other 
patiently waiting.  Anyone have any info of shipping time frame if one ordered 
now as they ramp up production?

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Re: [Elecraft] [OT] The Ultimate List of Hobbies for Men

[Eric Swartz - WA6HHQ, Elecraft]

We're over the OT limit for sure. :-)  Let's end the thread now in the interest 
of relieving others from emial inbox severe overload.


Eric
Moderator (hopefully not for life..)
/elecraft.com/
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Re: [Elecraft] BNC connector oddity on KX3

[Don Wilhelm]

Rich,

Since you have traced the problem to the contact between the female BNC 
and the male (yes your twisting and applying pressure confirms that is 
the problem).


It is entirely possible that if you had some old cables made with old 75 
ohm BNC male connectors, that they could have enlarged the female pin 
causing it to become marginal when used with the 50 ohm male connectors.


You may have success with a very slender tool to bend the 'fingers' of 
the female connector toward the center, but the best cure is to replace 
that connector.


Before we get into another long discussion of 50 ohm and 75 ohm center 
pin diameters, let me say that modern BNCs use the same diameter center 
pin for both.
That was not always true, so beware when buying older BNC jumpers at 
hamfest flea markets - the old ones could be old 75 ohm BNCs with the 
larger center pin.  Those less than 10 or 15 years old are OK.
It may also be that *some* imported BNC connectors do not have the 
proper diameter.  For best results, buy only Amphenol connectors or 
other trusted brands.


73,
Don W3FPR

On 3/9/2018 11:13 AM, rich hurd WC3T wrote:

I've pretty much exhausted most of the permutations of my cables and
connectors.  The only persistent behavior is that if I apply slight
pressure to the side of the BNC connector where it plugs into the jack on
the KX3, or sometimes if I twist it and then apply slight pressure just so,
I see a jump in the noise floor and instead of the internal ATU wearing
itself out and giving up with a 9:1 or 7:1 SWR, it immediately tunes to 1.0
or 1.1.   I have removed/swapped all my the antenna leads.  I have four of
them, all Cables On Demand (Amphenol) manufacture.  I also have a number of
BNC to banana plug jacks, and even an MFJ-1899T.  If I replace the leads
without doing the twisting-and-slight-pressure thing, I lose the RF
connection; the S meter has no indications on it, and the noise floor is
nonexistent.


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Re: [Elecraft] Cable for KX2 and KPXA-100

[Don Wilhelm]

Tim,

I suspect no one knows the answer because it has not been tested.
If you can find a 2 to 3 foot long TRRS plug to TRRS jack cable 
(extension cable), it should be easy enough to give it a try.  If it 
works, then it works.
If you have problems, be prepared to remove that extension to see if it 
is the problem.
This is not an official Elecraft answer, I am just indicating that there 
is an easy way to try the extension.


73,
Don W3FPR

On 3/9/2018 8:20 AM, Tim N9PUZ wrote:

I have a KX2/KPXA-100 combination. I'd like to be able to physically
separate the two more than the factory supplied cables will allow. Any
problems with adding a 2 or 3 foot extension to the KX2ACBL data/control
cable that runs between the two?

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Re: [Elecraft] BNC connector oddity on KX3

[rich hurd WC3T]

Thanks Don; I remember that we went over this earlier in the thread.

Highly unlikely that I had legacy stuff as I became a ham in 2015 and
acquired most of my stuff new.

I am inclined to think that it was more possibly an out of spec 50 ohm
connector or a manufacturing defect.  I've already worked on the finger
bending thing but I ageee that given my lack of success that I'd be best
served by spending the $47 and just buying a new assembly and replacing it.


I appreciate all the help and suggestions from all the Elecraft community.

On Fri, Mar 9, 2018 at 17:48 Don Wilhelm  wrote:

> Rich,
>
> Since you have traced the problem to the contact between the female BNC
> and the male (yes your twisting and applying pressure confirms that is
> the problem).
>
> It is entirely possible that if you had some old cables made with old 75
> ohm BNC male connectors, that they could have enlarged the female pin
> causing it to become marginal when used with the 50 ohm male connectors.
>
> You may have success with a very slender tool to bend the 'fingers' of
> the female connector toward the center, but the best cure is to replace
> that connector.
>
> Before we get into another long discussion of 50 ohm and 75 ohm center
> pin diameters, let me say that modern BNCs use the same diameter center
> pin for both.
> That was not always true, so beware when buying older BNC jumpers at
> hamfest flea markets - the old ones could be old 75 ohm BNCs with the
> larger center pin.  Those less than 10 or 15 years old are OK.
> It may also be that *some* imported BNC connectors do not have the
> proper diameter.  For best results, buy only Amphenol connectors or
> other trusted brands.
>
> 73,
> Don W3FPR
>
> On 3/9/2018 11:13 AM, rich hurd WC3T wrote:
> > I've pretty much exhausted most of the permutations of my cables and
> > connectors.  The only persistent behavior is that if I apply slight
> > pressure to the side of the BNC connector where it plugs into the jack on
> > the KX3, or sometimes if I twist it and then apply slight pressure just
> so,
> > I see a jump in the noise floor and instead of the internal ATU wearing
> > itself out and giving up with a 9:1 or 7:1 SWR, it immediately tunes to
> 1.0
> > or 1.1.   I have removed/swapped all my the antenna leads.  I have four
> of
> > them, all Cables On Demand (Amphenol) manufacture.  I also have a number
> of
> > BNC to banana plug jacks, and even an MFJ-1899T.  If I replace the leads
> > without doing the twisting-and-slight-pressure thing, I lose the RF
> > connection; the S meter has no indications on it, and the noise floor is
> > nonexistent.
> >
>
-- 
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

[Bill Frantz]

Since SignaLinks seem to be a continuing topic, one thing I 
noticed with mine is that the manufacturer seems to have been 
upgrading the design. When I first heard (probably from Jim) 
that there were problems with the SignaLink, I found a web site 
with directions for fixing some of them. So I warmed up my 
soldering iron and opened my SignaLink. When I looked carefully, 
every single one of the issues on the web site had been 
addressed in my unit.


I got a Tascam 24 bit device, which I used for several years, 
but it wouldn't work on my Linux BeagleBone, because of the lack 
of drivers. It worked well on my Mac. Now I'm using the KIO3B 
upgrade to my K3 and am quite happy with it. The SignaLink has 
moved to my portable KX3 station, where I'm looking for a 
smaller, lighter solution.


73 Bill AE6JV

On 3/8/18 at 10:40 PM, j...@audiosystemsgroup.com (Jim Brown) wrote:


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


---
Bill Frantz| If the site is supported by  | Periwinkle
(408)356-8506  | ads, you are the product.| 16345 
Englewood Ave
www.pwpconsult.com |  | Los Gatos, 
CA 95032


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Re: [Elecraft] any KPA500 available

[Bill Johnson]

The price difference and gain make the KPA500 still a great amp so good luck 
finding a deal!  The KPA1500 is for us folks who need just  little more when 
this sunspot cycle sucks to make communications and have a lightweight amp that 
can be transported.  The 1500 fits lots of needs with a tuner included.  OFS, I 
want one.

73,
Bill
K9YEQ

-Original Message-
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of Jamie WW3S
Sent: Friday, March 9, 2018 4:14 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] any KPA500 available

with the new amp shipping, whats the going price for a KPA500? Any good clean 
gently used ones available
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delivered to k9...@live.com
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