Re: [Elecraft] K3: Noise Reduction (NR) in FM Mode

[Bob Tellefsen]

That could be, Ron.
I remember when GE had it in their radio, and we
didn't, it soon showed up so we could compete in bids.
I imagine the bid process drove that more than any
actual need :-)
73, Bob N6WG

- Original Message - 
From: "Ron D'Eau Claire" <[EMAIL PROTECTED]>
To: 
Sent: Thursday, June 05, 2008 8:12 PM
Subject: RE: [Elecraft] K3: Noise Reduction (NR) in FM Mode


>
> ???
>
> I worked on FM gear in the land mobile business as a service rep and
> salesman and we *never* used a noise blanker. A limiting I.F.
amplifier was
> a basic part of the receiver design since the detector does not
respond to
> amplitude modulation at all, including noise.
>
> Noise does not modulate the frequency.
>
> Maybe Motorola didn't use good FM detectors. Some simple types of
"FM
> detectors" respond to both AM and FM.
>
> Come to think of it maybe that's why I outsold Motorola in our
market area
> with E.F. Johnson land mobile FM gear .
>
> Ron AC7AC
>
>
> -Original Message-
>
> Hi John
> When I worked for Motorola, both their and GE's top of the line
two-way FM
> mobile radios did include noise blankers for the mobile environment.
They
> worked quite well for their intended use. 73, Bob N6WG
>
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Re: [Elecraft] K3: Noise Reduction (NR) in FM Mode

[Matt Zilmer]

At least with the Motorola Syntor X, they used a separate and very
simple receiver to pick out impulse noise and used this secondary RX
detector output to poke holes in the main RX audio.  They called it an
Extender and I believe it was only included with the low-band Syntor
X.  It is described as a Noise Blanker.

I have one of these LB Syntor X's in mobile use, but have never found
a situation where the Extender was needed (or a way to real-world test
it!).  Turning the Extender on or off has no apparent effect on
receive sensitivity however.  I've watched the blanking pulse train
from the Extender outpt to the blanking circuit on the main RX - the
pulses are present, but can't really be heard in the main.

Shamless Plug:  my little company makes agile controllers for the Moto
Syntor and Syntor X radios.  This is the only reason I know this
fairly useless bit of trivia.

73,
matt, W6NIA

On Thu, 05 Jun 2008 20:44:27 -0700, you wrote:

>Aaargh! I meant to say we used high level I.F. limiters so no AM would get
>to the detector. That included noise.
>
>So "blankers" were never needed. 
>
>Maybe Motorola didn't use good limiters.
>
>Now to see if I can pry my foot out of my mouth... 
>
>Ron AC7AC
>
>-Original Message-
>??? 
>
>I worked on FM gear in the land mobile business as a service rep and
>salesman and we *never* used a noise blanker. A limiting I.F. amplifier was
>a basic part of the receiver design since the detector does not respond to
>amplitude modulation at all, including noise.
>
>Noise does not modulate the frequency. 
>
>Maybe Motorola didn't use good FM detectors. Some simple types of "FM
>detectors" respond to both AM and FM.
>
>Come to think of it maybe that's why I outsold Motorola in our market area
>with E.F. Johnson land mobile FM gear . 
>
>Ron AC7AC
>
>
>-Original Message-
>
>Hi John
>When I worked for Motorola, both their and GE's top of the line two-way FM
>mobile radios did include noise blankers for the mobile environment.  They
>worked quite well for their intended use. 73, Bob N6WG
>
>_
>
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[Elecraft] [K3] Using a K3 with a TT amplifier??

[W7TEA]

Has anyone connected their K3 to a TT amp for QSK operation without using an
external keyer?  If so, how?  Received my Madelyn-gram today!  Hope my K3
arrives early next week!

73, Gary W7TEA
-- 
View this message in context: 
http://www.nabble.com/-K3--Using-a-K3-with-a-TT-amplifier---tp17684472p17684472.html
Sent from the Elecraft mailing list archive at Nabble.com.

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RE: [Elecraft] K3: Noise Reduction (NR) in FM Mode

[Ron D'Eau Claire]

Aaargh! I meant to say we used high level I.F. limiters so no AM would get
to the detector. That included noise.

So "blankers" were never needed. 

Maybe Motorola didn't use good limiters.

Now to see if I can pry my foot out of my mouth... 

Ron AC7AC

-Original Message-
??? 

I worked on FM gear in the land mobile business as a service rep and
salesman and we *never* used a noise blanker. A limiting I.F. amplifier was
a basic part of the receiver design since the detector does not respond to
amplitude modulation at all, including noise.

Noise does not modulate the frequency. 

Maybe Motorola didn't use good FM detectors. Some simple types of "FM
detectors" respond to both AM and FM.

Come to think of it maybe that's why I outsold Motorola in our market area
with E.F. Johnson land mobile FM gear . 

Ron AC7AC


-Original Message-

Hi John
When I worked for Motorola, both their and GE's top of the line two-way FM
mobile radios did include noise blankers for the mobile environment.  They
worked quite well for their intended use. 73, Bob N6WG

_

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RE: [Elecraft] K3: Noise Reduction (NR) in FM Mode

[Ron D'Eau Claire]

??? 

I worked on FM gear in the land mobile business as a service rep and
salesman and we *never* used a noise blanker. A limiting I.F. amplifier was
a basic part of the receiver design since the detector does not respond to
amplitude modulation at all, including noise.

Noise does not modulate the frequency. 

Maybe Motorola didn't use good FM detectors. Some simple types of "FM
detectors" respond to both AM and FM.

Come to think of it maybe that's why I outsold Motorola in our market area
with E.F. Johnson land mobile FM gear . 

Ron AC7AC


-Original Message-

Hi John
When I worked for Motorola, both their and GE's top of the line two-way FM
mobile radios did include noise blankers for the mobile environment.  They
worked quite well for their intended use. 73, Bob N6WG

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Re: [Elecraft] K3: Noise Reduction (NR) in FM Mode

[Ken Kopp]

The Motorola and GE 2-way mobile radios with noise blankers
were just that ... noise blankers ... that worked in the IF chain
and "blanked" (turned off) the IF's for the duration of a noise pulse.
They were primarily found in "low band" (30 - 50 mHz) radios and
were aimed at ignition noise. The NB's were options and not installed
in every radio.

73! Ken Kopp - K0PP
(Retired career 2-way radio tech) 


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Re: [Elecraft] N4PY software for K3 now available

[n4lq]

N4PY software simply provides rig control. Basically its a very nice program 
allows you to totally control your rig via your PC and it cost $65 up front 
and $30 per year thereafter. HRD provides all the above plus all the digital 
modes, PSK, RTTY etc. etc. It's free.


Steve Ellington
[EMAIL PROTECTED]
- Original Message - 
From: "Don Rasmussen" <[EMAIL PROTECTED]>

To: 
Sent: Thursday, June 05, 2008 11:05 AM
Subject: [Elecraft] N4PY software for K3 now available



Can anyone contrast N4PY (paid for) with HRD (free)?

I have limited experience with HRD, but have never
tried N4PY. Also have LP-PAN coming, looking for the
best way to go with respect to software for it.

TIA...


[Elecraft] N4PY software for K3 now available
Don Wilhelm w3fpr at embarqmail.com
Thu Jun 5 09:52:57 EDT 2008


I just received a note from Carl Moreschi N4PY saying
that his N4PY software now includes K3 support.  If
you are interested, you can check it out - his webpage
is www.n4py.com.

73,
Don W3FPR


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No virus found in this incoming message.
Checked by AVG.
Version: 8.0.100 / Virus Database: 270.0.0/1486 - Release Date: 6/5/2008 
6:29 PM


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Re: Re: [Elecraft] K2 - signal loss in band-pass filter

[TF3KX]

Well, I agree that the basic receiving performance of the rig may not be
significantly affected, or even noticed at all.

But in my case I am not able to set the range of the S-meter properly, which
I attribute to the low 8V level.  My S-meter can not be adjusted to turn all
LEDs off when no signal is present, and I do not get the S-meter quite up to
full scale when the RF gain is turned fully CCW.

If I am correct, this is due to the low 8V and that would be an incentive to
get that voltage fixed.

73 - Kristinn, TF3KX


David Woolley (E.L) wrote:
> 
> Are LB3SA wrote:
>> 
>> But if you have a hard time getting the ALC voltage up to 3.8 volt
>> according
> 
> This voltage is related to AGC, not ALC.
> 
>> to the manual you can solder a 10K resistor across RP6 pins 3-4 on the
> 
> My impression is that people worry too much about this.  With all 
> components exactly on value this voltage is only achievable with R1 at 
> the end stop (I can't remember if it is just achievable or just not 
> achievable).  What really matters is whether or not you can get a 
> sensible AGC threshold within the control range of R1, which you can 
> only do once you have the whole receiver.
> 
>> control board (Gary from Elecraft suggested this for me). This works
>> great
>> and I now see 3.8V but it doesn't really make much of an audible
>> difference.
>> 
> 
> 
> -- 
> David Woolley
> "The Elecraft list is a forum for the discussion of topics related to 
> Elecraft products and more general topics related ham radio"
> List Guidelines 
> ___
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> 
> 

-- 
View this message in context: 
http://www.nabble.com/K2---signal-loss-in-band-pass-filter-tp17294418p17682216.html
Sent from the Elecraft mailing list archive at Nabble.com.

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Re: [Elecraft] K3: Noise Reduction (NR) in FM Mode

[Bob Tellefsen]

Hi John
When I worked for Motorola, both their and GE's top of the line
two-way FM mobile radios did include noise blankers for the mobile
environment.  They worked quite well for their intended use.
73, Bob N6WG

- Original Message - 
From: "WA6L" <[EMAIL PROTECTED]>
To: 
Sent: Thursday, June 05, 2008 7:34 AM
Subject: [Elecraft] K3: Noise Reduction (NR) in FM Mode


>
>
> Yesterday I discovered by accident (or stupidity) that if you have
Noise
> Reduction engaged and you go to FM mode, you do not receive any
intelligible
> signals.  You can tell that there is a signal, but you cannot make
it out.
>
> I realize that there is no earthy reason to use NR in FM.  But, if
you have
> NR engaged on another mode and go to FM, you will be sorry.
>
> So, perhaps on the "we will get to it someday list" there could be a
> firmware change to disallow noise reduction in the FM mode?  It
wouldn't
> hurt . . .
>
> 73,
>
> John, WA6L
>
>
> -- 
> View this message in context:
http://www.nabble.com/K3%3A--Noise-Reduction-%28NR%29-in-FM-Mode-tp17671258p17671258.html
> Sent from the Elecraft mailing list archive at Nabble.com.
>
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[Elecraft] K3 BETA FIRMWARE RELEASE -- MCU Revision 1.99

[wayne burdick]

K3 beta-test firmware revision 1.99 is now available. Highlights 
include:


  * Per-band power output setting (great for use with amps and 
transverters)

  * ANTIVOX gain increased
  * Support for external amplifier ALC
  * MIC up/down button functions
  * Remote control ("CAT") enhancements
  * Power loss on 6 meters at high power corrected
  * Receive-mode large-signal RFI detection and warning

Full details appear at the end of this email.

The use of beta-test firmware is encouraged, but optional. Please send 
any problem reports to [EMAIL PROTECTED]


For instructions on how to obtain and load beta firmware, please see:

  http://www.elecraft.com/K3/k3_software.htm

73,
Wayne
N6KR

* * *

MCU 1.99 / DSP 1.76, 6-4-08

New Features & Misc. Changes:

* POWER LOSS DURING TRANSMIT ON 6 M CORRECTED.

* RIT APPLIES TO BOTH VFOs WHEN LINKED. With the subreceiver installed,
   this allows diversity receive tuning via RIT while preserving a 
fixed transmit frequency.


* ANTIVOX GAIN increased. (Some antivox users may need to use a lower 
setting.)


* MIC UP/DOWN buttons, if provided on your mic, will move VFO A up or 
down one
  unit at the present tuning rate. Holding the UP or DOWN buttons for 
about 1 second
  will auto-repeat the VFO movement, allowing manual scanning of the 
current band.


* PER-BAND POWER CONTROL:  This feature is very useful with external 
amplifiers

  as well as transverters. To use it, change CONFIG:PWR SET to PER-BAND.

* RECEIVE RFI DETECTION: If the CONFIG:RFI DET menu entry is set to
  NOR (normal), the K3 will detect the presence of very large signals 
(about 2 watts or
  higher) that appear at the ANT1/2 jacks in receive mode. “HI RFI” 
will be displayed
  on VFO B. Try separating antennas, using single-band filters, or 
reducing power.

  To disable RFI detection, set CONFIG:RFI DET to OFF (not recommended).

* EXTERNAL ALC:  We strongly recommend that external ALC only be used 
to protect
  your amplifier during operation into a failed load or other serious 
condition. In fact,
  most amplifiers have such protection built in, and do not need or 
specify the use of ALC.
  ALC should not be used as a way to clip or compress fast voice peaks. 
The K3’s
  ALC uses a moderate attack time specifically to prevent signal 
distortion due to ALC
  action, so it is the responsibility of the operator to keep drive 
below this level.


  DO NOT SET THE K3’s POWER LEVEL TO MAX AND ADJUST AMP OUTPUT USING
  THE AMP’s ALC CONTROL. THIS WILL RESULT IN SPLATTER AND KEY CLICKS.
  INSTEAD, ADJUST THE DRIVE ON EACH BAND SO IT’S JUST BELOW THE LEVEL
  WHERE ALC STARTS TO ACTIVATE. (See Per-Band Power Control, above.)

  NOTE: You may need to make some simple modifications to the 
transceiver to use
  external ALC. This information will be added to our K3 mods page. 
Information for

  specific amplifiers will be made available when possible.

  Once the mods have been made, set CONFIG:EXT ALC to ON by tapping 
‘1’. (6 m can be
  turned on/off separately from HF.) The default external ALC threshold 
of -4.0V will work
  in most cases, but can be changed if required. If your amplifier’s 
gain varies from band
  to band, you may want to set CONFIG:PWR SET to PER-BAND. You can then 
adjust
  the drive ideally on each band to prevent external ALC activation 
during normal operation.
  If you select CMP/ALC metering, external ALC activity is indicated by 
8 or more bars.
  If you select SWR/RF metering, the CMP/ALC meter icons will flash 
during external ALC
  activity to make you aware of the condition. Reduce the drive power 
if this occurs.


Remote Control Command Changes (for application software users and 
developers):


* BAND CHANGES RESULTING FROM FA/FB commands now run to completion 
before
  any additional commands are processed (such as MD or FW). This should 
prevent
  errors in mode or filter settings which sometimes occurred with older 
K3 firmware.

  Band changes take approximately 0.5 seconds to complete.

* FA/FB COMMANDS TARGETING 6 METERS will select a 6 m transverter if 
available.

  If not, these commands will select the K3’s internal 6 m band.

* FW (filter bandwidth) command fully implemented. If K3 extended 
command mode is

  in effect (“K31;”), FW sets or reads bandwidth in 10-Hz increments.

* DS (VFO A/icon read) now reports a number of K3-specific icon states, 
including

  RX ANT, SUB, etc. See K3 Programmer’s Reference, revision B2 or later.

---

http://www.elecraft.com

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Re: Re: [Elecraft] K2 - signal loss in band-pass filter

[David Woolley (E.L)]

Are LB3SA wrote:


But if you have a hard time getting the ALC voltage up to 3.8 volt according


This voltage is related to AGC, not ALC.


to the manual you can solder a 10K resistor across RP6 pins 3-4 on the


My impression is that people worry too much about this.  With all 
components exactly on value this voltage is only achievable with R1 at 
the end stop (I can't remember if it is just achievable or just not 
achievable).  What really matters is whether or not you can get a 
sensible AGC threshold within the control range of R1, which you can 
only do once you have the whole receiver.



control board (Gary from Elecraft suggested this for me). This works great
and I now see 3.8V but it doesn't really make much of an audible difference.




--
David Woolley
"The Elecraft list is a forum for the discussion of topics related to 
Elecraft products and more general topics related ham radio"

List Guidelines 
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Re: [Elecraft] K3 SDR note by G3UNA

[Benny Aumala]

Te article is in Elector-magazine and should be buyed.
Shop gives almost no details of the unit.
E.g. is a sound card included on PCB?
The connection to PC seems to be just USB-line.


Benny OH9NB

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[Elecraft] Test

[Geoffrey Mackenzie-Kennedy]

Please ignore.

GM4ESD
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[Elecraft] K3: Noise Reduction (NR) in FM Mode

[WA6L]

Yesterday I discovered by accident (or stupidity) that if you have Noise
Reduction engaged and you go to FM mode, you do not receive any intelligible
signals.  You can tell that there is a signal, but you cannot make it out. 

I realize that there is no earthy reason to use NR in FM.  But, if you have
NR engaged on another mode and go to FM, you will be sorry.  

So, perhaps on the "we will get to it someday list" there could be a
firmware change to disallow noise reduction in the FM mode?  It wouldn't
hurt . . .

73,

John, WA6L


-- 
View this message in context: 
http://www.nabble.com/K3%3A--Noise-Reduction-%28NR%29-in-FM-Mode-tp17671258p17671258.html
Sent from the Elecraft mailing list archive at Nabble.com.

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[Elecraft] N4PY software for K3 now available

[Don Rasmussen]

Can anyone contrast N4PY (paid for) with HRD (free)? 

I have limited experience with HRD, but have never
tried N4PY. Also have LP-PAN coming, looking for the
best way to go with respect to software for it. 

TIA... 


[Elecraft] N4PY software for K3 now available
Don Wilhelm w3fpr at embarqmail.com 
Thu Jun 5 09:52:57 EDT 2008 


I just received a note from Carl Moreschi N4PY saying
that his N4PY software now includes K3 support.  If
you are interested, you can check it out - his webpage
is www.n4py.com.

73,
Don W3FPR


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[Elecraft] N4PY software for K3 now available

[Don Wilhelm]

I just received a note from Carl Moreschi N4PY saying that his N4PY 
software now includes K3 support.  If you are interested, you can check 
it out - his webpage is www.n4py.com.


73,
Don W3FPR


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[Elecraft] SN# 975 Delivered

[Philip Leonard WVØT]

Ordered   12/20/2007

Katiegram 05/16/2008

Delivered 06/04/2008
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RE: [Elecraft] K3: Automatic Character Spacing

[G3SJJ]

Auto character spacing for K3. Yes, please.

Chris G3SJJ
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[Elecraft] WA3WSJ: NorCal S8 Sig Gen Sold!

[Edward R. Breneiser]

Hello all,

Boy, I received  MANY emails from ops wanting this kit! The kit is sold
to Bruce, N1RX and thanks to all for the interest. 

72,
Kangaroo Ed, WA3WSJ

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Re: [Elecraft] Keyer paddle - lightweight and cheap

[Bob Nielsen]

I like the idea of the mounting plate to keep it stable.  I think I  
will add something like that to my White Rook paddle (I really don't  
like having to use my left hand for that purpose).


Bob N7XY

On Jun 4, 2008, at 6:47 PM, Alan Bloom wrote:

Regarding the earlier discussion, if anyone is interested in a  
homebrew,

sub-5 ounce (142g) keyer paddle that absolutely does not "walk" around
the desk, see:

< http://www.cds1.net/~n1al/paddle.htm >

I built it many years ago and just recently came across my old  
drawings.


Al N1AL


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Bob Nielsen
[EMAIL PROTECTED]



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[Elecraft] [K3] Katiegram Received

[Bud Semon N7CW]

I received my Katiegram today for a K3 ordered Jan. 7, 2008.

 

73, Bud  N7CW

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