Re: [Elecraft] KTCXO3-1 TCXO

[Chad Wasinger]

Thanks you all for responding to this. I also note that it takes around an hour 
for the larger corrections to settle down and several hours for complete 
stability to set in.
I've been monitoring my front panel temperature sensor which normally runs 36 C 
with the radio on for several hours and a shack temperature of 75 F degrees. 
From a cold start up at 24 C, it normally takes about an hour to reach a 
constant temperature of 36 C on the FP. I know the FP temp reading and TCXO are 
separate pieces but at the point of 36 C, I have really notice the TCXO to 
settle out. 
> Date: Sun, 3 Feb 2013 09:22:57 -0900
> To: Elecraft@mailman.qth.net
> From: kl...@acsalaska.net
> Subject: [Elecraft]  KTCXO3-1 TCXO
> 
> Date: Sun, 3 Feb 2013 08:45:36 -0600
> From: Chad Wasinger 
> To: "elecraft@mailman.qth.net" 
> Subject: [Elecraft] KTCXO3-1 TCXO
> Message-ID: 
> Content-Type: text/plain; charset="iso-8859-1"
> 
> Does anyone know the approximate warm-up/stabilize time of the KTCXO3-1?
> Thanks,ChadN0YK
> 
> Chad,
> 
> I observed the action of my TCXO3-1 closely after initial 
> installation of the EXREF.  I noted from cold start up that the TCXO 
> was receiving a continued updated offset for about 20 to 30 minutes, 
> whereby it stabilized out at about an offset of about 78-80.  From 
> that time on the offset would only wander a couple points over several 
> minutes.
> 
> A check of my 28-MHz transmit frequency accuracy was within 2-Hz 
> (indicating 0.1 ppm) and would only occasionally change by 1-Hz 
> reflecting the slow drift of the TCXO between reference checks with 
> the external 10-MHz source.  Running the TCXO-3 without the EXREF 
> accuracy is aprox. 0.5ppm or on 28-MHz this translates to a maximum 
> error of +/- 14-Hz.
> 
> Freq. measurements are made with an EIP-538 microwave counter that is 
> referenced to a Rubidium 10-MHz reference.  The K3EXREF is referenced 
> to a separate OCXO  which is run on a battery full-time.  Short-term 
> stability of the OCXO is +/-5 E-12, Long-term stability is +/-5 E-5 
> which requires adjustment about every four months to correct about 
> 1-Hz long-term drift.  I have a 200K ten-turn helipot for adjusting 
> the OCXO frequency.  I use my Rubidium as frequency reference which 
> is +/- 5 E-11 after 30-min warmup.  GPS is more accurate but I find 
> the Rubidium sufficient for my needs.  eg: 10-MHz is 1.0 E+7, 
> multiplied by 5 E-11 = 5.0 E-4 Hz = 0.0005 Hz
> 
> See details of the EXREF (and TCXO3-1):
> http://www.kl7uw.com/K3EXREF.htm
> 
> 73, Ed - KL7UW
> 
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[Elecraft] (no subject)

[Tony Read]

please forward to this address
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[Elecraft] P3 rubber button

[Brenton Meadows]

Hi, sorry to ask again, has anybody got a part number for just the rubber
buttons for the P3 pan adaptor. Got a reply from Elecraft (listed below)but
the cost is prohibitive if I have to buy the entire front panel.  Richard
was kind enough to answer me promptly but $637.10 is a bit out of the
question for really one rubber insert button which is my requirement.  I
have heard of minimum breakdown part supply but for an item of this nature,
I was expecting $15 or so.  I know the entire keypad button set for the K3
was only $20 or so from my K3's previous owner so was expecting a similar
pricing.  I think it may be a part number that is available and maybe some
confusion on elecrafts side.  Does anybody have a individual part number
breakdown of the P3?  The rubber button has a slight defect in it and I
just want the unit to look like new which it will with the button replaced.
cheers
Brenton


On Tue, Feb 5, 2013 at 3:48 AM, Richard AD7FZ  wrote:

> Hello Brenton, Yes no problem. The P3 Front Panel including the switches
> E850426 costs $637. 10 each plus shipping. You can order this board or any
> parts you might need from the Elecraft kits directly on our secure credit
> card page 
> .
> Just fill in the credit card information and in the "Comments" box describe
> the parts you need including the Elecraft Part Numbers (found in the Parts
> List of your Elecraft Manuals) and quantities. If you need more sales help,
> have shipping questions or want to pay using PayPal, please email Madelyn
>  . Thanks 73 Richard
>
>
> --
> Kind Regards
>
> Brenton
>



Position and Navigation Systems Pty Ltd
Brenton Meadows
Managing Director
Phone: +61 8 8121-5155
Mobile 0418 844-700
Fax +61 8 8121-5145
Email bren...@posnav.com.au
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Re: [Elecraft] P3 rubber button

[Fred Jensen]

Sure looks like a misunderstanding to me..  I doubt you can get a single 
button cover, they're usually integral to the keypad board.  If your P3 
is new [first owner] and the button has a defect, I can't believe the 
Elecraft warranty wouldn't cover it.


73,

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

On 2/4/2013 11:13 AM, Brenton Meadows wrote:

Hi, sorry to ask again, has anybody got a part number for just the rubber
buttons for the P3 pan adaptor. Got a reply from Elecraft (listed below)but
the cost is prohibitive if I have to buy the entire front panel.  Richard
was kind enough to answer me promptly but $637.10 is a bit out of the
question for really one rubber insert button which is my requirement.  I
have heard of minimum breakdown part supply but for an item of this nature,
I was expecting $15 or so.  I know the entire keypad button set for the K3
was only $20 or so from my K3's previous owner so was expecting a similar
pricing.  I think it may be a part number that is available and maybe some
confusion on elecrafts side.  Does anybody have a individual part number
breakdown of the P3?  The rubber button has a slight defect in it and I
just want the unit to look like new which it will with the button replaced.
cheers
Brenton


On Tue, Feb 5, 2013 at 3:48 AM, Richard AD7FZ  wrote:


Hello Brenton, Yes no problem. The P3 Front Panel including the switches
E850426 costs $637. 10 each plus shipping. You can order this board or any
parts you might need from the Elecraft kits directly on our secure credit
card page 
.
Just fill in the credit card information and in the "Comments" box describe
the parts you need including the Elecraft Part Numbers (found in the Parts
List of your Elecraft Manuals) and quantities. If you need more sales help,
have shipping questions or want to pay using PayPal, please email Madelyn
 . Thanks 73 Richard


--
Kind Regards

Brenton





Position and Navigation Systems Pty Ltd
Brenton Meadows
Managing Director
Phone: +61 8 8121-5155
Mobile 0418 844-700
Fax +61 8 8121-5145
Email bren...@posnav.com.au
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Checked by AVG - www.avg.com
Version: 2013.0.2897 / Virus Database: 2639/6075 - Release Date: 02/01/13





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[Elecraft] XV432 - No intermediate pwr output

[Tom Warren]

I purchased this unit used ( nice workmanship) and it seems to work well in 
all respects 
except as noted below. I must add that the prior owner told me up front that 
there
was an issue with its power. However, when I first put it online line it seemed 
to work ok.

   Originally I used it with my K2/100 to drive a Mirage D1010 (100w) in ssb 
mode.  As
time passed, the unit started to show signs of loss of power similar to a high 
swr turn back
or high heat shutoff and I attributed it to a failing relay in the Mirage, 
which I cleaned and the 
system seemed to again work ok for a while.  After a reoccurrence, I switched 
to another rig 
for my 432 activities and let the XV432 sit on the shelf while I mulled the 
issue.

 I now have a Flex 5000 online and in the process of interfacing the XV432 with 
good results
except for the old issue again and I'm determined to figure out the problem 
since it really seems 
to be the transverter and not the K2 or Mirage.

  The setup;

 Flex 5000
Single coax interface
RCA keyline
XV432
Bird 43 (25W slug)
Bird dummy load

 Here's what I've found;

1)  As I start the Flexs' drive, the XV432 output turns on at 0w then continues 
to increase to 2.5w 
   then 'shuts off' and power drops to 0.
2) As I continue to increase the drive, the output power again turns on at 
about 15w and increases to 20w +.   

I've looked all over the internet for a similar problem but don't find 
anything. Maybe someone out there 
can point me in the right direction before really hitting the books and at my 
age gray matter is in short supply ;0).

Thanks in advance for any help.
73
Tom
W4TMW





 
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Re: [Elecraft] KTCXO3-1 TCXO

[Chad Wasinger]

Side question: Does anyone know the exact location of the temperature sensor 
for the FP reading on the K3? 

> From: chadwasin...@outlook.com
> To: kl...@acsalaska.net; elecraft@mailman.qth.net
> Date: Mon, 4 Feb 2013 09:24:44 -0600
> Subject: Re: [Elecraft] KTCXO3-1 TCXO
> 
> Thanks you all for responding to this. I also note that it takes around an 
> hour for the larger corrections to settle down and several hours for complete 
> stability to set in.
> I've been monitoring my front panel temperature sensor which normally runs 36 
> C with the radio on for several hours and a shack temperature of 75 F 
> degrees. From a cold start up at 24 C, it normally takes about an hour to 
> reach a constant temperature of 36 C on the FP. I know the FP temp reading 
> and TCXO are separate pieces but at the point of 36 C, I have really notice 
> the TCXO to settle out. 
> > Date: Sun, 3 Feb 2013 09:22:57 -0900
> > To: Elecraft@mailman.qth.net
> > From: kl...@acsalaska.net
> > Subject: [Elecraft]  KTCXO3-1 TCXO
> > 
> > Date: Sun, 3 Feb 2013 08:45:36 -0600
> > From: Chad Wasinger 
> > To: "elecraft@mailman.qth.net" 
> > Subject: [Elecraft] KTCXO3-1 TCXO
> > Message-ID: 
> > Content-Type: text/plain; charset="iso-8859-1"
> > 
> > Does anyone know the approximate warm-up/stabilize time of the KTCXO3-1?
> > Thanks,ChadN0YK
> > 
> > Chad,
> > 
> > I observed the action of my TCXO3-1 closely after initial 
> > installation of the EXREF.  I noted from cold start up that the TCXO 
> > was receiving a continued updated offset for about 20 to 30 minutes, 
> > whereby it stabilized out at about an offset of about 78-80.  From 
> > that time on the offset would only wander a couple points over several 
> > minutes.
> > 
> > A check of my 28-MHz transmit frequency accuracy was within 2-Hz 
> > (indicating 0.1 ppm) and would only occasionally change by 1-Hz 
> > reflecting the slow drift of the TCXO between reference checks with 
> > the external 10-MHz source.  Running the TCXO-3 without the EXREF 
> > accuracy is aprox. 0.5ppm or on 28-MHz this translates to a maximum 
> > error of +/- 14-Hz.
> > 
> > Freq. measurements are made with an EIP-538 microwave counter that is 
> > referenced to a Rubidium 10-MHz reference.  The K3EXREF is referenced 
> > to a separate OCXO  which is run on a battery full-time.  Short-term 
> > stability of the OCXO is +/-5 E-12, Long-term stability is +/-5 E-5 
> > which requires adjustment about every four months to correct about 
> > 1-Hz long-term drift.  I have a 200K ten-turn helipot for adjusting 
> > the OCXO frequency.  I use my Rubidium as frequency reference which 
> > is +/- 5 E-11 after 30-min warmup.  GPS is more accurate but I find 
> > the Rubidium sufficient for my needs.  eg: 10-MHz is 1.0 E+7, 
> > multiplied by 5 E-11 = 5.0 E-4 Hz = 0.0005 Hz
> > 
> > See details of the EXREF (and TCXO3-1):
> > http://www.kl7uw.com/K3EXREF.htm
> > 
> > 73, Ed - KL7UW
> > 
> > __
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> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:Elecraft@mailman.qth.net
> > 
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> 
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[Elecraft] Mailing list adjustment and FS item

[Paul]

Dear Elecraft,
It looks there are only two options for the mailing list - get every 
post or get a digest. Many lists also have a "neither" option so the 
person can read  postings from the mailing list itself without getting a 
digest or individual emails. If you have that option, that's what I'd 
like - no individual emails, no digest. I'll just look online.  Thank you.


I have an item to post for sale (FS) but not sure how to format it with 
topic and copy body.


I guess the Topic would be:
 FS: KX1 professionally assembled
With the Body as:

KX-1 with KXB30/80 M adapter, KXATI internal auto antenna tuner, KXPD1 
plug-in keyer paddle, WhiteRook single lever
paddle with cable, BNC-BP binding posts, 90 degree BNC adapter, BNC to 
coax adapter, labtec headphones, 1.4 AHr
PowerSonic battery, Yellow Pelican Case. KX1 and all Elecraft options 
were ASSEMBLED and checked
out by professional builder, Don Wilhelm who added custom direct DC 
input to battery for charging.

All manuals and paperwork included.
Shipped and insured to CONUSA $475

According to Don, "The power output exceeds specification and for the 
receiver, a signal of -130 dBm was clearly

discernible on all bands."

If I list my K2 here, do I send you a similar email for that?  I am not 
abandoning Elecraft. Just swapping gear around to pay for the KX3 and 
maybe an eventual K3.


Thank you and 73,
Paul

--
For those who risk, life has a flavor the protected shall ne'er enjoy.

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[Elecraft] K3 auto tuner

[W9HAK]

In the L network is the inductor in series or shunt?

Smith Bradford
W9HAK

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Re: [Elecraft] XV432 - No intermediate pwr output

[Don Wilhelm]

Tom,

That is really weird behavior.  It should be linear.
What is the power level from the Flex for a full 20 watts output?

I am going to assume that the XV432 LEDs show you the proper power 
output - if not, calibrate the LEDs at 20 watts output  (Power Cal pot 
in the left rear quadrant) so you can use the LEDs to monitor the output 
while you temporarily move the Bird wattmeter between the Flex and the 
XV432.


The only thing I can think of is that the Local Oscillator in the XV432 
is dropping out. You can remove the top cover and monitor the DC voltage 
at the test point near the front center.  You will have to "catch it in 
the act", so keep transmission times short to keep from overheating the 
XV432.


There is one other potential problem, if you are using transverter IF 
output from the Flex, and that is that some 432 MHz energy is getting 
back into the Flex and "fooling" its power output mechanism into 
"thinking" there is more 28 MHz drive than actually exists.
The answer to that problem is to insert a Low Pass Filter with a cutoff 
somewhere between 30 MHz and 50 MHz between the Flex and the XV432.


73,
Don W3FPR

On 2/4/2013 3:15 PM, Tom Warren wrote:

 I purchased this unit used ( nice workmanship) and it seems to work well 
in all respects
except as noted below. I must add that the prior owner told me up front that 
there
was an issue with its power. However, when I first put it online line it seemed 
to work ok.

Originally I used it with my K2/100 to drive a Mirage D1010 (100w) in ssb 
mode.  As
time passed, the unit started to show signs of loss of power similar to a high 
swr turn back
or high heat shutoff and I attributed it to a failing relay in the Mirage, 
which I cleaned and the
system seemed to again work ok for a while.  After a reoccurrence, I switched 
to another rig
for my 432 activities and let the XV432 sit on the shelf while I mulled the 
issue.

  I now have a Flex 5000 online and in the process of interfacing the XV432 
with good results
except for the old issue again and I'm determined to figure out the problem 
since it really seems
to be the transverter and not the K2 or Mirage.

   The setup;

  Flex 5000
Single coax interface
RCA keyline
XV432
Bird 43 (25W slug)
Bird dummy load

  Here's what I've found;

1)  As I start the Flexs' drive, the XV432 output turns on at 0w then continues 
to increase to 2.5w
then 'shuts off' and power drops to 0.
2) As I continue to increase the drive, the output power again turns on at 
about 15w and increases to 20w +.

I've looked all over the internet for a similar problem but don't find 
anything. Maybe someone out there
can point me in the right direction before really hitting the books and at my 
age gray matter is in short supply ;0).

Thanks in advance for any help.
73
Tom
W4TMW



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Re: [Elecraft] K3 auto tuner

[Don Wilhelm]

Smith,

The inductors are in series, the capacitors are in shunt and are 
switchable from the input side or the output side to cover a wide range 
of impedance


73,
Don W3FPR.

On 2/4/2013 3:48 PM, W9HAK wrote:

In the L network is the inductor in series or shunt?

Smith Bradford


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Re: [Elecraft] Mailing list adjustment and FS item

[Don Wilhelm]

Paul,

There is a "No Mail" option on that subscription page - it will allow 
you to post, but no email will be sent.


Yes, you can advertize your K2 on this list, many others have. Please 
put FS in the subject line to help others if they are not shopping..


73,
Don W3FPR

On 2/4/2013 3:35 PM, Paul wrote:

Dear Elecraft,
It looks there are only two options for the mailing list - get every 
post or get a digest. Many lists also have a "neither" option so the 
person can read  postings from the mailing list itself without getting 
a digest or individual emails. If you have that option, that's what 
I'd like - no individual emails, no digest. I'll just look online.  
Thank you.


I have an item to post for sale (FS) but not sure how to format it 
with topic and copy body.


I guess the Topic would be:
 FS: KX1 professionally assembled
With the Body as:

KX-1 with KXB30/80 M adapter, KXATI internal auto antenna tuner, KXPD1 
plug-in keyer paddle, WhiteRook single lever
paddle with cable, BNC-BP binding posts, 90 degree BNC adapter, BNC to 
coax adapter, labtec headphones, 1.4 AHr
PowerSonic battery, Yellow Pelican Case. KX1 and all Elecraft options 
were ASSEMBLED and checked
out by professional builder, Don Wilhelm who added custom direct DC 
input to battery for charging.

All manuals and paperwork included.
Shipped and insured to CONUSA $475

According to Don, "The power output exceeds specification and for the 
receiver, a signal of -130 dBm was clearly

discernible on all bands."

If I list my K2 here, do I send you a similar email for that?  I am 
not abandoning Elecraft. Just swapping gear around to pay for the KX3 
and maybe an eventual K3.


Thank you and 73,
Paul



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[Elecraft] K3 - RF Board - C238 - AGC change

[N2TK, Tony]

A year or so ago there was discussion about adding additional caps to C238
to reduce IMD. I believe it was two 1-uf caps. 

What was the outcome of that? Did it make a noticeable difference in pileups
or for weak signal detection?

Is it a recommended mod?

 

73,

N2TK, Tony

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Re: [Elecraft] K3 auto tuner

[Ron D'Eau Claire]

Series. The capacitors are in shunt at either the input or output as needed.

73, Ron AC7AC

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of W9HAK
Sent: Monday, February 04, 2013 12:49 PM
To: Elecraft listserve
Subject: [Elecraft] K3 auto tuner

In the L network is the inductor in series or shunt?

Smith Bradford
W9HAK

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Re: [Elecraft] K3 auto tuner

[W9HAK]

Thanks to all that replied.

W9HAK


On 2/4/2013 3:44 PM, Ron D'Eau Claire wrote:

Series. The capacitors are in shunt at either the input or output as needed.

73, Ron AC7AC

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of W9HAK
Sent: Monday, February 04, 2013 12:49 PM
To: Elecraft listserve
Subject: [Elecraft] K3 auto tuner

In the L network is the inductor in series or shunt?

Smith Bradford
W9HAK

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No virus found in this message.
Checked by AVG - www.avg.com
Version: 2013.0.2897 / Virus Database: 2639/6079 - Release Date: 02/03/13



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Re: [Elecraft] P3 rubber button

[Alan Bloom]

Yes, he may have misunderstood your question.  And if it was a 
manufacturing defect by all means have it replaced under warranty.


All the buttons on the P3 are part of a single rubber molded key matrix 
that also provides the mounting for the LCD display.  I'm not sure what 
it costs, but a lot less than $637. :=)


To replace the rubber key matrix you first have to un-stick the old one 
from the front panel.  (The back of the key matrix is sticky, like 
tape.)  It also involves removing the LCD display and re-installing it 
after changing the key matrix, a procedure that is covered in the 
Owner's manual.  It's a little tricky to get the two flex cables 
simultaneously latched in the two connectors, but shouldn't be a problem 
if you're reasonably dextrous.


Alan N1AL



On 2/4/2013 11:42 AM, Fred Jensen wrote:

Sure looks like a misunderstanding to me..  I doubt you can get a single
button cover, they're usually integral to the keypad board.  If your P3
is new [first owner] and the button has a defect, I can't believe the
Elecraft warranty wouldn't cover it.

73,

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

On 2/4/2013 11:13 AM, Brenton Meadows wrote:

Hi, sorry to ask again, has anybody got a part number for just the rubber
buttons for the P3 pan adaptor. Got a reply from Elecraft (listed
below)but
the cost is prohibitive if I have to buy the entire front panel.  Richard
was kind enough to answer me promptly but $637.10 is a bit out of the
question for really one rubber insert button which is my requirement.  I
have heard of minimum breakdown part supply but for an item of this
nature,
I was expecting $15 or so.  I know the entire keypad button set for
the K3
was only $20 or so from my K3's previous owner so was expecting a similar
pricing.  I think it may be a part number that is available and maybe
some
confusion on elecrafts side.  Does anybody have a individual part number
breakdown of the P3?  The rubber button has a slight defect in it and I
just want the unit to look like new which it will with the button
replaced.
cheers
Brenton


On Tue, Feb 5, 2013 at 3:48 AM, Richard AD7FZ  wrote:


Hello Brenton, Yes no problem. The P3 Front Panel including the switches
E850426 costs $637. 10 each plus shipping. You can order this board
or any
parts you might need from the Elecraft kits directly on our secure
credit
card page
.

Just fill in the credit card information and in the "Comments" box
describe
the parts you need including the Elecraft Part Numbers (found in the
Parts
List of your Elecraft Manuals) and quantities. If you need more sales
help,
have shipping questions or want to pay using PayPal, please email
Madelyn
 . Thanks 73 Richard


--
Kind Regards

Brenton





Position and Navigation Systems Pty Ltd
Brenton Meadows
Managing Director
Phone: +61 8 8121-5155
Mobile 0418 844-700
Fax +61 8 8121-5145
Email bren...@posnav.com.au
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-
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2013.0.2897 / Virus Database: 2639/6075 - Release Date: 02/01/13





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Re: [Elecraft] K2 VCO Alignment only 0.02V @ R30

[JeremyJones]

So Gary from Elecraft gave me some things to check today.  Heres where I am
at for the moment.
T5 is back to 15 turns of red.  This brings the frequency close to spec @
TP1.
Pulled C72 and measured its value at 273pF.
U6 has 4V @ pin5 and pin1 goes from 7.5 to 0V when doing the PLL range test.
T5 lead 3 is showing 2.4V
TP1 is reading 0.686V with the RF probe.
TP1 is reading 8179.89 @ 4000.10
There is 5V on both sides of RFC15.
Cal PLL gives me info 232 even with TP1 @11915.60 tuned to 7000.00

Seems I'm going in a bit of a circle, but thats how things are at the
moment.  I'm letting the unit sit powered up for a while before I try Cal
PLL again.



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Re: [Elecraft] K3 - RF Board - C238 - AGC change

[Wayne Burdick]

N2TK, Tony wrote:

A year or so ago there was discussion about adding additional caps  
to C238

to reduce IMD. I believe it was two 1-uf caps.

What was the outcome of that? Did it make a noticeable difference in  
pileups

or for weak signal detection?


Very slight.



Is it a recommended mod?


No. However, there was very positive response to the AGC changes made  
in firmware a few months later (rev 4.51 at the time). We corrected  
two issues with the DSP code, leading to the following timely quote  
from G3TJP: "It sounds like you've scored a touchdown with this  
revised firmware"


73,
Wayne
N6KR


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Re: [Elecraft] K3 - RF Board - C238 - AGC change

[N2TK, Tony]

Thanks Wayne,
I am using 4.61 and am happy with the AGC. Just checking to make sure I
didn't miss something.
73,
N2TK, Tony

-Original Message-
From: Wayne Burdick [mailto:n...@elecraft.com] 
Sent: Monday, February 04, 2013 5:21 PM
To: N2TK, Tony
Cc: 'elecraft'
Subject: Re: [Elecraft] K3 - RF Board - C238 - AGC change

N2TK, Tony wrote:

> A year or so ago there was discussion about adding additional caps to 
> C238 to reduce IMD. I believe it was two 1-uf caps.
>
> What was the outcome of that? Did it make a noticeable difference in 
> pileups or for weak signal detection?

Very slight.


> Is it a recommended mod?

No. However, there was very positive response to the AGC changes made in
firmware a few months later (rev 4.51 at the time). We corrected two issues
with the DSP code, leading to the following timely quote from G3TJP: "It
sounds like you've scored a touchdown with this revised firmware"

73,
Wayne
N6KR


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[Elecraft] KX3 Beta 1.36 testing

[W2bpi1]

Have not seen any reports. Wonder how the testers are doing?  72  
George/W2BPI
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[Elecraft] K1 amp keying circuit

[Dennis Rayfield]

I'm thinking of hooking up a small amp to my K1for those times when I need a 
bit more power.  I've researched the archives and found some messages from 2008 
and 2011 that indicate small 2 transistor circuit similar to that for the K2 
could be used, driving it with the 6R line.  In reviewing the K1 RF Board and 
Filter board schematics, it looks like J1 on the filter board has everything I 
need - 6R, 6 Volts and a ground.  Just build a small board that could plug 
directly into this.  Can it really be that simple, or am I missing something?

Denny - KI3F
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Re: [Elecraft] KX3 Beta 1.36 testing

[Jim Sheldon]

If there are any bugs I haven't found them yet.  Been really exercising my KX3 
since Friday when the K3 decided to develop an RX problem.  Parts to repair it 
will be here tomorrow.  Main thing I miss not having the K3 running is the 
ability to check a band at a glance with the P3.  iSDR and my iPad work but 
there isn't room on the desk to set the iPad with everything else on it and I 
have the KX3 connected to the main computer for logging and use of the Griffin 
PowerMate tuning knob which works on the KX3 just as well as it does on the K3.

Jim - W0EB

> Have not seen any reports. Wonder how the testers are doing?  72
> George/W2BPI
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Re: [Elecraft] K1 amp keying circuit

[Don Wilhelm]

Denny,

Yes, it is really that simple.  I am not sure about your "plug it in" 
statement, if you use a connector at J1 on the filter board, you will 
not be able to plug in the KAT1 - so you may want to look for another 
place to pick up the 6R signal and 6 volts.


73,
Don W3FPR

On 2/4/2013 6:41 PM, Dennis Rayfield wrote:

I'm thinking of hooking up a small amp to my K1for those times when I need a 
bit more power.  I've researched the archives and found some messages from 2008 
and 2011 that indicate small 2 transistor circuit similar to that for the K2 
could be used, driving it with the 6R line.  In reviewing the K1 RF Board and 
Filter board schematics, it looks like J1 on the filter board has everything I 
need - 6R, 6 Volts and a ground.  Just build a small board that could plug 
directly into this.  Can it really be that simple, or am I missing something?

Denny - KI3F



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Re: [Elecraft] K1 amp keying circuit

[Dennis Rayfield]

Thanks Don.  My thought was that when I have it going into the amp, the KAT1 
does not do me much good anyway, the tuner I have on the outboard side of the 
amp will be doing the work.

Denny - KI3F


On Feb 4, 2013, at 6:57 PM, Don Wilhelm  wrote:

> Denny,
> 
> Yes, it is really that simple.  I am not sure about your "plug it in" 
> statement, if you use a connector at J1 on the filter board, you will not be 
> able to plug in the KAT1 - so you may want to look for another place to pick 
> up the 6R signal and 6 volts.
> 
> 73,
> Don W3FPR
> 
> On 2/4/2013 6:41 PM, Dennis Rayfield wrote:
>> I'm thinking of hooking up a small amp to my K1for those times when I need a 
>> bit more power.  I've researched the archives and found some messages from 
>> 2008 and 2011 that indicate small 2 transistor circuit similar to that for 
>> the K2 could be used, driving it with the 6R line.  In reviewing the K1 RF 
>> Board and Filter board schematics, it looks like J1 on the filter board has 
>> everything I need - 6R, 6 Volts and a ground.  Just build a small board that 
>> could plug directly into this.  Can it really be that simple, or am I 
>> missing something?
>> 
>> Denny - KI3F
>> 
> 

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Re: [Elecraft] P3 rubber button

[Mike Reublin]

Seems just a tad steep, considering you can get a new P3 (kit) for $699.95.

73, Mike NF4L

On Feb 4, 2013, at 2:13 PM, Brenton Meadows  wrote:

> Hi, sorry to ask again, has anybody got a part number for just the rubber
> buttons for the P3 pan adaptor. Got a reply from Elecraft (listed below)but
> the cost is prohibitive if I have to buy the entire front panel.  Richard
> was kind enough to answer me promptly but $637.10 is a bit out of the
> question for really one rubber insert button which is my requirement.  I
> have heard of minimum breakdown part supply but for an item of this nature,
> I was expecting $15 or so.  I know the entire keypad button set for the K3
> was only $20 or so from my K3's previous owner so was expecting a similar
> pricing.  I think it may be a part number that is available and maybe some
> confusion on elecrafts side.  Does anybody have a individual part number
> breakdown of the P3?  The rubber button has a slight defect in it and I
> just want the unit to look like new which it will with the button replaced.
> cheers
> Brenton


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Re: [Elecraft] K1 amp keying circuit

[Don Wilhelm]

Denny,

But I was thinking that you would not want to physically remove the 
tuner - putting it into CAL will effectively remove it.


73,
Don W3FPR

On 2/4/2013 7:01 PM, Dennis Rayfield wrote:

Thanks Don.  My thought was that when I have it going into the amp, the KAT1 
does not do me much good anyway, the tuner I have on the outboard side of the 
amp will be doing the work.

Denny - KI3F


On Feb 4, 2013, at 6:57 PM, Don Wilhelm  wrote:


Denny,

Yes, it is really that simple.  I am not sure about your "plug it in" 
statement, if you use a connector at J1 on the filter board, you will not be able to plug 
in the KAT1 - so you may want to look for another place to pick up the 6R signal and 6 
volts.

73,
Don W3FPR

On 2/4/2013 6:41 PM, Dennis Rayfield wrote:



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Re: [Elecraft] XV432 - No intermediate pwr output

[M Cresap]

I had a similar problem with my XV432. I was able to chase the problem to the 
tx 
driver stage. The fix was to add ground vias from the top to the bottom of the 
board in a few judicious places. I passed this info back to Gary at Elecraft. I 
know of at least one other XV432 that has been stabilized by this method. I 
don't see those mods in the latest XV432 errata sheet, perhaps they vias have 
been added to the latest circuit board or they have found other ways to cure 
the problem.73, Mike, W3IP


--- On Mon, 2/4/13, Tom Warren  wrote:


From: Tom Warren 
Subject: [Elecraft] XV432 - No intermediate pwr output
To: elecraft@mailman.qth.net
Date: Monday, February 4, 2013, 8:15 PM



    I purchased this unit used ( nice workmanship) and it seems to work well in 
all respects 
except as noted below. I must add that the prior owner told me up front that 
there
was an issue with its power. However, when I first put it online line it seemed 
to work ok.

   Originally I used it with my K2/100 to drive a Mirage D1010 (100w) in ssb 
mode.  As
time passed, the unit started to show signs of loss of power similar to a high 
swr turn back
or high heat shutoff and I attributed it to a failing relay in the Mirage, 
which I cleaned and the 
system seemed to again work ok for a while.  After a reoccurrence, I switched 
to another rig 
for my 432 activities and let the XV432 sit on the shelf while I mulled the 
issue.

I now have a Flex 5000 online and in the process of interfacing the XV432 with 
good results
except for the old issue again and I'm determined to figure out the problem 
since it really seems 
to be the transverter and not the K2 or Mirage.

  The setup;

Flex 5000
Single coax interface
RCA keyline
XV432
Bird 43 (25W slug)
Bird dummy load

Here's what I've found;

1)  As I start the Flexs' drive, the XV432 output turns on at 0w then continues 
to increase to 2.5w 
       then 'shuts off' and power drops to 0.
2) As I continue to increase the drive, the output power again turns on at 
about 15w and increases to 20w +.   

I've looked all over the internet for a similar problem but don't find 
anything. Maybe someone out there 
can point me in the right direction before really hitting the books and at my 
age gray matter is in short supply ;0).

Thanks in advance for any help.
73
Tom
W4TMW






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Re: [Elecraft] K2 VCO Alignment only 0.02V @ R30

[JeremyJones]

So Cal PLL is still not working. 
The 5V from U4 pin13 makes it all the way to U6 pin 6, but is blocked by C94
on the other branch. 
Still only 0.020V at R30. 



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[Elecraft] KX1 FS: KX1 professionally assembled

[k7nhb]

KX-1 with KXB30/80 M adapter, KXATI internal auto antenna tuner, KXPD1
plug-in keyer paddle or WhiteRook single lever paddle with cable, BNC-BP
binding posts, 90 degree BNC adapt
 er, BNC to coax
adapter, labtec headphones, 1.4 AHr PowerSonic battery, yellow Pelican Case.

KX1 and all Elecraft options were ASSEMBLED and checked out by professional
builder, Don Wilhelm. 
All manuals and paperwork included.
 
Shipped and insured to CONUSA $475

According to Don, "The power output exceeds specification and for the
receiver, a signal of -130 dBm was clearly discernible on all bands."

73, Paul
K7NHB



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[Elecraft] XV432 - No intermediate pwr output

[Johnny Siu]

Hello Mike,
 
You are probably correct. XV432 had had problems in power and frequency 
stability.  However, with the evolution of time, elecraft has found out the 
ways to solve the problems.
 
I experienced similar problems in XV144 though not so serious as XV432

TNX & 73,


Johnny VR2XMC



 寄件人︰ M Cresap 
收件人︰ Tom Warren  
副本(CC)︰ elecraft@mailman.qth.net 
傳送日期︰ 2013年02月5日 (週二) 9:21 AM
主題︰ Re: [Elecraft] XV432 - No intermediate pwr output
  
I had a similar problem with my XV432. I was able to chase the problem to the 
tx 
driver stage. The fix was to add ground vias from the top to the bottom of the 
board in a few judicious places. I passed this info back to Gary at Elecraft. I 
know of at least one other XV432 that has been stabilized by this method. I 
don't see those mods in the latest XV432 errata sheet, perhaps they vias have 
been added to the latest circuit board or they have found other ways to cure 
the problem.73, Mike, W3IP


--- On Mon, 2/4/13, Tom Warren  wrote:


From: Tom Warren 
Subject: [Elecraft] XV432 - No intermediate pwr output
To: elecraft@mailman.qth.net
Date: Monday, February 4, 2013, 8:15 PM



    I purchased this unit used ( nice workmanship) and it seems to work well in 
all respects 
except as noted below. I must add that the prior owner told me up front that 
there
was an issue with its power. However, when I first put it online line it seemed 
to work ok.

   Originally I used it with my K2/100 to drive a Mirage D1010 (100w) in ssb 
mode.  As
time passed, the unit started to show signs of loss of power similar to a high 
swr turn back
or high heat shutoff and I attributed it to a failing relay in the Mirage, 
which I cleaned and the 
system seemed to again work ok for a while.  After a reoccurrence, I switched 
to another rig 
for my 432 activities and let the XV432 sit on the shelf while I mulled the 
issue.

I now have a Flex 5000 online and in the process of interfacing the XV432 with 
good results
except for the old issue again and I'm determined to figure out the problem 
since it really seems 
to be the transverter and not the K2 or Mirage.

  The setup;

Flex 5000
Single coax interface
RCA keyline
XV432
Bird 43 (25W slug)
Bird dummy load

Here's what I've found;

1)  As I start the Flexs' drive, the XV432 output turns on at 0w then continues 
to increase to 2.5w 
       then 'shuts off' and power drops to 0.
2) As I continue to increase the drive, the output power again turns on at 
about 15w and increases to 20w +.   

I've looked all over the internet for a similar problem but don't find 
anything. Maybe someone out there 
can point me in the right direction before really hitting the books and at my 
age gray matter is in short supply ;0).

Thanks in advance for any help.
73
Tom
W4TMW
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Re: [Elecraft] Mailing list adjustment and FS item

[John_N1JM]

Nabble is your friend.

73, John N1JM


k7nhb wrote
> Dear Elecraft,
> It looks there are only two options for the mailing list - get every 
> post or get a digest. Many lists also have a "neither" option so the 
> person can read  postings from the mailing list itself without getting a 
> digest or individual emails. If you have that option, that's what I'd 
> like - no individual emails, no digest. I'll just look online.  Thank you.
> 
> I have an item to post for sale (FS) but not sure how to format it with 
> topic and copy body.
> 
> I guess the Topic would be:
>   FS: KX1 professionally assembled
> With the Body as:
> 
> KX-1 with KXB30/80 M adapter, KXATI internal auto antenna tuner, KXPD1 
> plug-in keyer paddle, WhiteRook single lever
> paddle with cable, BNC-BP binding posts, 90 degree BNC adapter, BNC to 
> coax adapter, labtec headphones, 1.4 AHr
> PowerSonic battery, Yellow Pelican Case. KX1 and all Elecraft options 
> were ASSEMBLED and checked
> out by professional builder, Don Wilhelm who added custom direct DC 
> input to battery for charging.
> All manuals and paperwork included.
> Shipped and insured to CONUSA $475
> 
> According to Don, "The power output exceeds specification and for the 
> receiver, a signal of -130 dBm was clearly
> discernible on all bands."
> 
> If I list my K2 here, do I send you a similar email for that?  I am not 
> abandoning Elecraft. Just swapping gear around to pay for the KX3 and 
> maybe an eventual K3.
> 
> Thank you and 73,
> Paul
> 
> -- 
> For those who risk, life has a flavor the protected shall ne'er enjoy.
> 
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[Elecraft] [K3} [KX3] SSBT like CWT ?

[Erik Basilier]

At Field Day I have observed a number of operators operating SSB. I have
noticed that there is a great variation in skill when it comes to tuning the
RX to an SSB signal. Sometimes I feel that the op has it tuned all wrong and
I almost want to grab the knob. Maybe different people's brains focus on
different aspects of the sound when they tune the RX. Some people seem to
want to tune for the best balance between highs and lows, when the HI CUT
and LO CUT would do a better job. When I tune the RX, I believe that I am
not trying to balance highs and lows, but rather trying to find some kind of
harmony in the sound. If I were tuning in a piece of music from an AM BC
station with the radio in SSB mode, clearly the harmonics of a musical note
will not be harmonious if the radio tuning is off. If a voice is used for
singing, it is like a musical instrument. If the voice is speaking, I
believe the harmonics are still at play as with a musical note. This leads
me to speculate that it would be possible to run an FFT on the received
audio and determine by how much the RX tuning is off, just like with CWT. I
am very fond of the CWT feature on the K3 and on the KX3. I wonder if it
would be practical to add SSBT as a new feature.

 

73,

Erik K7TV

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Re: [Elecraft] [K3} [KX3] SSBT like CWT ?

[Peter Lambert]

You are spot on, Eric

This is an algorithm I've contemplated writing many times.

Voice results from the vocal cords snapping together in the range around
85Hz.  The filter effect of the various cavities, throat, mouth and nasal
are quite high Q and filter the harmonic rich vocal chord excitation to
produce the voice.

If you watch an SSB signal on your PSK waterfall you'll clearly see the
harmonics of the vocal chords.

I think a DSP algorithm that calculates the location of the carrier based on
the separation between the vocal chords is a definite doable proposition.

It would give SSB the perfect clarity you seek.

Love to have a go at this (I do DSP).  Do you Elecraft guys want to have a
go or interested in using it if I do it ? (I could probably do it as a piece
of PC code that processes sound card input so you could evaluate it).
Doesn't feel like to be a difficult thing to do.

Cheers,
Peter VK4JD

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Erik Basilier
Sent: Tuesday, 5 February 2013 3:07 PM
To: Elecraft@mailman.qth.net
Subject: [Elecraft] [K3} [KX3] SSBT like CWT ?

At Field Day I have observed a number of operators operating SSB. I have
noticed that there is a great variation in skill when it comes to tuning the
RX to an SSB signal. Sometimes I feel that the op has it tuned all wrong and
I almost want to grab the knob. Maybe different people's brains focus on
different aspects of the sound when they tune the RX. Some people seem to
want to tune for the best balance between highs and lows, when the HI CUT
and LO CUT would do a better job. When I tune the RX, I believe that I am
not trying to balance highs and lows, but rather trying to find some kind of
harmony in the sound. If I were tuning in a piece of music from an AM BC
station with the radio in SSB mode, clearly the harmonics of a musical note
will not be harmonious if the radio tuning is off. If a voice is used for
singing, it is like a musical instrument. If the voice is speaking, I
believe the harmonics are still at play as with a musical note. This leads
me to speculate that it would be possible to run an FFT on the received
audio and determine by how much the RX tuning is off, just like with CWT. I
am very fond of the CWT feature on the K3 and on the KX3. I wonder if it
would be practical to add SSBT as a new feature.

 

73,

Erik K7TV

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Re: [Elecraft] [K3} [KX3] SSBT like CWT ?

[Gary Gregory]

Eric,

I have the K3 and KX3 sounding pretty close in the headset on RX. (CM-500)

I have found that adjustment of the RX-EQ needs to be done first and then I
set the Hi/Lo cut and I then went and rechecked my RX-EQ settings to be
sure I had the best audio for me. By doing it this way I now rarely find
the need to adjust my Hi/Lo cut again unless the band is acting
dramatically different to when I did my set up or a station has moved close
to the frequency I am operating on and I still need to work the frequency I
have been on. Obviously I have no need to alter my RX-EQ settings now that
I have them set.

My ears are not good, the internal speaker on both rigs don't work well for
me. Tinnitus IS an issue that I can't get rid off short of
decapitation...:-)

As I don't hear the lows very well, I have changed the RX-EQ to improve the
audio quality and I check that against the Hi/Lo settings I prefer so that
now I rarely have a need to change them.

Tuning up and down the band for me now is pretty easy with respect to
hearing a 'pleasant' tone of voice.

YMMV of course and my opinion must be taken as purely subjective and I hope
you don't have to deal with the difficulties I have to deal with on a daily
basis.

73

Gary

On 5 February 2013 16:07, Erik Basilier  wrote:

> At Field Day I have observed a number of operators operating SSB. I have
> noticed that there is a great variation in skill when it comes to tuning
> the
> RX to an SSB signal. Sometimes I feel that the op has it tuned all wrong
> and
> I almost want to grab the knob. Maybe different people's brains focus on
> different aspects of the sound when they tune the RX. Some people seem to
> want to tune for the best balance between highs and lows, when the HI CUT
> and LO CUT would do a better job. When I tune the RX, I believe that I am
> not trying to balance highs and lows, but rather trying to find some kind
> of
> harmony in the sound. If I were tuning in a piece of music from an AM BC
> station with the radio in SSB mode, clearly the harmonics of a musical note
> will not be harmonious if the radio tuning is off. If a voice is used for
> singing, it is like a musical instrument. If the voice is speaking, I
> believe the harmonics are still at play as with a musical note. This leads
> me to speculate that it would be possible to run an FFT on the received
> audio and determine by how much the RX tuning is off, just like with CWT. I
> am very fond of the CWT feature on the K3 and on the KX3. I wonder if it
> would be practical to add SSBT as a new feature.
>
>
>
> 73,
>
> Erik K7TV
>
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-- 
*Gary - VK1ZZ
Motorhome Portable
The Shack*
*Elecraft K3
P3 Panadapter
KPA500FT
KAT500FT**
KX3-K
*
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Re: [Elecraft] [K3} [KX3] SSBT like CWT ?

[Wright, Robert]

This sounds like an interesting project.  It would seem that the technique 
would be finding the offset frequency that provides the best alignment of 
harmonics, which is what we naturally do by ear.  Not difficult, but would 
probably need a bit of tweaking to provide good real-time performance.   It 
would only be valuable if it was significantly faster than what we do manually.

It's good when projects are self-motivating.

73, Bob, N7ZO


-Original Message-
From: elecraft-boun...@mailman.qth.net 
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Peter Lambert
Sent: Monday, February 04, 2013 9:25 PM
To: 'Erik Basilier'; Elecraft@mailman.qth.net
Subject: Re: [Elecraft] [K3} [KX3] SSBT like CWT ?

You are spot on, Eric

This is an algorithm I've contemplated writing many times.

Voice results from the vocal cords snapping together in the range around 85Hz.  
The filter effect of the various cavities, throat, mouth and nasal are quite 
high Q and filter the harmonic rich vocal chord excitation to produce the voice.

If you watch an SSB signal on your PSK waterfall you'll clearly see the 
harmonics of the vocal chords.

I think a DSP algorithm that calculates the location of the carrier based on 
the separation between the vocal chords is a definite doable proposition.

It would give SSB the perfect clarity you seek.

Love to have a go at this (I do DSP).  Do you Elecraft guys want to have a go 
or interested in using it if I do it ? (I could probably do it as a piece of PC 
code that processes sound card input so you could evaluate it).
Doesn't feel like to be a difficult thing to do.

Cheers,
Peter VK4JD

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Erik Basilier
Sent: Tuesday, 5 February 2013 3:07 PM
To: Elecraft@mailman.qth.net
Subject: [Elecraft] [K3} [KX3] SSBT like CWT ?

At Field Day I have observed a number of operators operating SSB. I have 
noticed that there is a great variation in skill when it comes to tuning the RX 
to an SSB signal. Sometimes I feel that the op has it tuned all wrong and I 
almost want to grab the knob. Maybe different people's brains focus on 
different aspects of the sound when they tune the RX. Some people seem to want 
to tune for the best balance between highs and lows, when the HI CUT and LO CUT 
would do a better job. When I tune the RX, I believe that I am not trying to 
balance highs and lows, but rather trying to find some kind of harmony in the 
sound. If I were tuning in a piece of music from an AM BC station with the 
radio in SSB mode, clearly the harmonics of a musical note will not be 
harmonious if the radio tuning is off. If a voice is used for singing, it is 
like a musical instrument. If the voice is speaking, I believe the harmonics 
are still at play as with a musical note. This leads me to speculate that it
  would be possible to run an FFT on the received audio and determine by how 
much the RX tuning is off, just like with CWT. I am very fond of the CWT 
feature on the K3 and on the KX3. I wonder if it would be practical to add SSBT 
as a new feature.

 

73,

Erik K7TV

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Re: [Elecraft] [K3} [KX3] SSBT like CWT ?

[Gary Gregory]

Would this provide the same result when the user has either a hearing
defect or reduced hearing?

Would the above issues be irrelevant.

It does sound like an interesting project though.

73
Gary

On 5 February 2013 16:54, Wright, Robert  wrote:

> This sounds like an interesting project.  It would seem that the technique
> would be finding the offset frequency that provides the best alignment of
> harmonics, which is what we naturally do by ear.  Not difficult, but would
> probably need a bit of tweaking to provide good real-time performance.   It
> would only be valuable if it was significantly faster than what we do
> manually.
>
> It's good when projects are self-motivating.
>
> 73, Bob, N7ZO
>
>
> -Original Message-
> From: elecraft-boun...@mailman.qth.net [mailto:
> elecraft-boun...@mailman.qth.net] On Behalf Of Peter Lambert
> Sent: Monday, February 04, 2013 9:25 PM
> To: 'Erik Basilier'; Elecraft@mailman.qth.net
> Subject: Re: [Elecraft] [K3} [KX3] SSBT like CWT ?
>
> You are spot on, Eric
>
> This is an algorithm I've contemplated writing many times.
>
> Voice results from the vocal cords snapping together in the range around
> 85Hz.  The filter effect of the various cavities, throat, mouth and nasal
> are quite high Q and filter the harmonic rich vocal chord excitation to
> produce the voice.
>
> If you watch an SSB signal on your PSK waterfall you'll clearly see the
> harmonics of the vocal chords.
>
> I think a DSP algorithm that calculates the location of the carrier based
> on the separation between the vocal chords is a definite doable proposition.
>
> It would give SSB the perfect clarity you seek.
>
> Love to have a go at this (I do DSP).  Do you Elecraft guys want to have a
> go or interested in using it if I do it ? (I could probably do it as a
> piece of PC code that processes sound card input so you could evaluate it).
> Doesn't feel like to be a difficult thing to do.
>
> Cheers,
> Peter VK4JD
>
> -Original Message-
> From: elecraft-boun...@mailman.qth.net
> [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Erik Basilier
> Sent: Tuesday, 5 February 2013 3:07 PM
> To: Elecraft@mailman.qth.net
> Subject: [Elecraft] [K3} [KX3] SSBT like CWT ?
>
> At Field Day I have observed a number of operators operating SSB. I have
> noticed that there is a great variation in skill when it comes to tuning
> the RX to an SSB signal. Sometimes I feel that the op has it tuned all
> wrong and I almost want to grab the knob. Maybe different people's brains
> focus on different aspects of the sound when they tune the RX. Some people
> seem to want to tune for the best balance between highs and lows, when the
> HI CUT and LO CUT would do a better job. When I tune the RX, I believe that
> I am not trying to balance highs and lows, but rather trying to find some
> kind of harmony in the sound. If I were tuning in a piece of music from an
> AM BC station with the radio in SSB mode, clearly the harmonics of a
> musical note will not be harmonious if the radio tuning is off. If a voice
> is used for singing, it is like a musical instrument. If the voice is
> speaking, I believe the harmonics are still at play as with a musical note.
> This leads me to speculate that it
>   would be possible to run an FFT on the received audio and determine by
> how much the RX tuning is off, just like with CWT. I am very fond of the
> CWT feature on the K3 and on the KX3. I wonder if it would be practical to
> add SSBT as a new feature.
>
>
>
> 73,
>
> Erik K7TV
>
> __
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> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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>



-- 
*Gary - VK1ZZ
Motorhome Portable
The Shack*
*Elecraft K3
P3 Panadapter
KPA500FT
KAT500FT**
KX3-K
*
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Re: [Elecraft] [K3} [KX3] SSBT like CWT ?

[Peter Lambert]

That's it precisely.  Should be able to resolve the exact frequency and
phase of the carrier.  There's a lot of information there to work with (take
a look at that waterfall with SSB you'll see what I mean).  Given the
carrier is rock stable with time it should be possible to do this with VERY
good accuracy.  I don't think it'd be all that hard at all.

Not a lot of point doing this on your own unless you've got an open source
rig.  I don't.  I've got Icom and Elecraft.  Reckon it could be done and
tested in the PC via a soundcard.  I'd be more than interested in doing it
if Elecraft were at all interested (even in an evaluation).  It'd feel like
a contribution to the amateur pool, I'd love to bring a little of my work
into the hobby.  There's probably plenty of DSP guys like me on this list
that could do it.

I tune for the "natural" sound that prompted Erik to write his original
post.  It feels a bit like getting all the lows to "line up" but when you do
find the spot it's sweet.  If you're in a particularly anal mood it can be a
challenge.  It's this that has made me contemplate the possibility many
times.

73's Peter  VK4JD

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Wright, Robert
Sent: Tuesday, 5 February 2013 3:54 PM
To: Elecraft@mailman.qth.net
Subject: Re: [Elecraft] [K3} [KX3] SSBT like CWT ?

This sounds like an interesting project.  It would seem that the technique
would be finding the offset frequency that provides the best alignment of
harmonics, which is what we naturally do by ear.  Not difficult, but would
probably need a bit of tweaking to provide good real-time performance.   It
would only be valuable if it was significantly faster than what we do
manually.

It's good when projects are self-motivating.

73, Bob, N7ZO


-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Peter Lambert
Sent: Monday, February 04, 2013 9:25 PM
To: 'Erik Basilier'; Elecraft@mailman.qth.net
Subject: Re: [Elecraft] [K3} [KX3] SSBT like CWT ?

You are spot on, Eric

This is an algorithm I've contemplated writing many times.

Voice results from the vocal cords snapping together in the range around
85Hz.  The filter effect of the various cavities, throat, mouth and nasal
are quite high Q and filter the harmonic rich vocal chord excitation to
produce the voice.

If you watch an SSB signal on your PSK waterfall you'll clearly see the
harmonics of the vocal chords.

I think a DSP algorithm that calculates the location of the carrier based on
the separation between the vocal chords is a definite doable proposition.

It would give SSB the perfect clarity you seek.

Love to have a go at this (I do DSP).  Do you Elecraft guys want to have a
go or interested in using it if I do it ? (I could probably do it as a piece
of PC code that processes sound card input so you could evaluate it).
Doesn't feel like to be a difficult thing to do.

Cheers,
Peter VK4JD

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Erik Basilier
Sent: Tuesday, 5 February 2013 3:07 PM
To: Elecraft@mailman.qth.net
Subject: [Elecraft] [K3} [KX3] SSBT like CWT ?

At Field Day I have observed a number of operators operating SSB. I have
noticed that there is a great variation in skill when it comes to tuning the
RX to an SSB signal. Sometimes I feel that the op has it tuned all wrong and
I almost want to grab the knob. Maybe different people's brains focus on
different aspects of the sound when they tune the RX. Some people seem to
want to tune for the best balance between highs and lows, when the HI CUT
and LO CUT would do a better job. When I tune the RX, I believe that I am
not trying to balance highs and lows, but rather trying to find some kind of
harmony in the sound. If I were tuning in a piece of music from an AM BC
station with the radio in SSB mode, clearly the harmonics of a musical note
will not be harmonious if the radio tuning is off. If a voice is used for
singing, it is like a musical instrument. If the voice is speaking, I
believe the harmonics are still at play as with a musical note. This leads
me to speculate that it
  would be possible to run an FFT on the received audio and determine by how
much the RX tuning is off, just like with CWT. I am very fond of the CWT
feature on the K3 and on the KX3. I wonder if it would be practical to add
SSBT as a new feature.

 

73,

Erik K7TV

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[Elecraft] KX3 command Visual index

[SHIBUYA SHINTARO]

Dear KX3 owners,
I want to share KX3 command Visual index.
Please visit to my blog and download it.

http://jf1vru.blog65.fc2.com/blog-entry-348.html

Appreciate your comment.

JF1VRU Shibu
  
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[Elecraft] W2 and K2, SWR display fine in CW, off in SSB

[Andreas Hofmann]

Hi,

My SWR is about 2:1 in CW, but when I switch to SSB on same frequency, my W2 
shows wide swings up to 5:1.  What could be the issue?  Same antenna, same rig, 
same frequency.  RFI?  Any ideas, please let me know...

Andy
KU7T
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