From: "Don Wilhelm"
To: "Graham Kimbell (G3TCT)"
Cc: "Elecraft reflector"
Sent: Thursday, December 17, 2009 6:36 PM
Subject: Re: [Elecraft] Noisy K-3 Receiver
> Graham,
>
> BUT - the K3 "RF Gain" control ONLY controls the IF gain - it does not
> re
Graham,
BUT - the K3 "RF Gain" control ONLY controls the IF gain - it does not
reduce the gain of the receiver front end - in that respect, the K3 is
similar to those other receivers that you referred to.. The preamp and
attenuator DO change the front end gain.
73,
Don W3FPR
Graham Kimbell (
This statement (If you run RF GAIN wide open the receiver will sound noisy
and you are limiting your dynamic range) is only true for the bands where
the
band noise is high, but on the higher bands (eg 6m), the band noise is only
a little higher than the receiver noise (and maybe not at all if you
, the FFT software will still produce some meaningful results.
The test should include AGC on and AGC off settings.
Paul, W9AC
- Original Message -
From: "Jim McCook"
To:
Sent: Thursday, December 17, 2009 10:06 AM
Subject: Re: [Elecraft] Noisy K-3 Receiver
> Juergen and o
Juergen and others.
I'm glad to see this thread get so much attention; it's about time this
issue was brought into focus. In spite of my huge appreciation for this
radio, I find it to be very noisy and fatiguing to listen to, especially
with weak signals.
I have, like others, tried all t
The other thing that helps (and helps a LOT) is to reduce the RF Gain
until the band noise is at a lower level - just barely present. Yes, it
will likely be different for each band, but can be quickly set by
listening to a spot with no signals and listen for the "frying noise" to
be barely per
any
> factory assembled. I would like to try and get the new DSP board to see if
> that changes much. Maybe it is because I am a casual K3 user that I notice
> all these quirks, these probably may disappear if i used a K3 every day. In
> the meantime I prefer any old analog contest radi
This subject of "K3 receiver noise" has illustrated how
differently we view our radios.
After seriously competing in the recent ARRL 10M and
160M contests ... and scoring very well... I commented to
Rose and radio club friends how -quiet- the receiver(s) are.
After a seven-month wait to get my
because I am a casual K3 user that I notice all
these quirks, these probably may disappear if i used a K3 every day. In the
meantime I prefer any old analog contest radio at the moment.
John
--- On Wed, 12/16/09, James Sarte wrote:
> From: James Sarte
> Subject: Re: [Elecraft] No
Hi
My k3. Must be be one of the newest issued, sn 3759. Delivered by ups
Monday this week. Finished the build last night, the 2 nd rx being
the last item to go in.
Just 2 items missing and wud you believe they are the 238mm zinc
screws which bolt down the sub rx L shape cover!!!
Dsp es
ginal Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Mike Harris
Sent: Wednesday, December 16, 2009 12:15 PM
To: Bill W4ZV; elecraft@mailman.qth.net
Subject: Re: [Elecraft] Noisy K-3 Receiver
G'day,
The simple fact is that the fai
at makes sense...
73 de James K2QI
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim Harris
Sent: Wednesday, December 16, 2009 10:33 PM
To: Elecraft Email
Subject: [Elecraft] Noisy K-3 Receiver
Dick,
I've had the sa
t may be hard for them to understand and appreciate our concern.
Have a good day and 73.
Jim, W0EM
Date: Tue, 15 Dec 2009 23:44:26 EST
From: r...@aol.com
Subject: [Elecraft] Noisy K-3 Receiver
To: elecraft@mailman.qth.net
Message-ID:
Content-Type: text/plain; charset="US-ASCII"
Hi Guys
r.com
- Original Message -
From: "Merv Schweigert"
Cc:
Sent: Wednesday, December 16, 2009 8:16 PM
Subject: Re: [Elecraft] Noisy K-3 Receiver
> Thanks for the info, last I had heard the board was not part of the new
> DSP
> board, but that was last month. I placed an o
I would like to hear more about the AF Filter Module. I didn't have any
initial interest in the DSP board upgrade but maybe I would reconsider if I
knew what the AF Filter Module did. Maybe someone who has upgraded could
comment.
73,
Mike K2MK
Lyle Johnson
Wed, 16 Dec 2009 09:45:58 -0800
>
board to arrive and HOPE it has that filter module
> installed. Last time I checked, there was a 2 week delay on shipping.
>
> Steve
> N4LQ
> n...@carolina.rr.com
> - Original Message -
> From: "Lyle Johnson"
> To:
> Sent: Wednesday, December 16, 2009
Thanks Greg -
Mine is 3539. There's a post on down the list that gives a link to a pic
of the rev. C board.
73, Mike
Greg - AB7R wrote:
> One of my K3s is #3459 and it has the updated DSP board. I think it was
> right
>
> around there when they started.
>
>
>
> -
>
> 73
One of my K3s is #3459 and it has the updated DSP board. I think it was right
around there when they started.
-
73,
Greg - AB7R
Whidbey Island WA
NA-065
On Wed Dec 16 14:36 , Mike sent:
>Any idea what serial number the upgrade started shipping with? Or a way
>to dete
Any idea what serial number the upgrade started shipping with? Or a way
to determine if I have it already?
Thanks,
Mike NF4L
Lyle Johnson wrote:
>> There is an often referred to AF filter module which installs on the
>> main DSP board ...
>>
>
> My understanding is that this is part of the
Dick:
You gave us the version of the K3 Utility. What version of firmware is in
the K3. You will need to have the K3 Utility on and the K3 on with the pc
connected to the K3. It should then show up in the tab for "firmware" below
the section labeled Firmware version. Click on "Check Versions No
PM
Subject: Re: [Elecraft] Noisy K-3 Receiver
>
>> There is an often referred to AF filter module which installs on the
>> main DSP board ...
>
> My understanding is that this is part of the DSP board swap upgrade,
> and is in currently shipping K3s.
>
> But I
-
> From: "Lyle Johnson"
> To:
> Sent: Wednesday, December 16, 2009 2:45 PM
> Subject: Re: [Elecraft] Noisy K-3 Receiver
>
>
>
>>> There is an often referred to AF filter module which installs on
>>> the
>>> main DSP board ...
>&g
G'day Lyle,
Interesting news. I will discover if this is so in the next couple
of weeks, the new DSP board is in the post.
Regards,
Mike VP8NO
- Original Message -
From: "Lyle Johnson"
To:
Sent: Wednesday, December 16, 2009 2:45 PM
Subject: Re: [Elecraft] Noi
> There is an often referred to AF filter module which installs on the
> main DSP board ...
My understanding is that this is part of the DSP board swap upgrade,
and is in currently shipping K3s.
But I've been known to be wrong!
73,
Lyle KK7P
_
> CONFIG: AGC THR may be set too high. Try a lower setting.
I agree with Bill. He may also want to experiment with other AGC settings
like AGC-F, AGC-S, AGC SLP and AGC HLD and AGC DCY.
I found exactly what was described until I changed the AGC threshold/slope
and equally important, the AGC r
riginal Message -
From: "Bill W4ZV"
To:
Sent: Wednesday, December 16, 2009 9:26 AM
Subject: Re: [Elecraft] Noisy K-3 Receiver
>
>
>>>>Thoughts: I realize that all s-meters read differently and the
>>>>fact that
> the MP s-meter shows a 4 s-unit stro
> Yes, the equalizer is a kind of remedy, but how about an embedded variable
> AF filter, tracking the width of the IF DSP filter?
>
That has always been the case in the K3. More specifically, the IF and
AF filters track in CW, SSB and DATA modes. In AM mode there is a
defined relationship
Dick -
You said "running 1.2.10.27". That is the version number of the utility
program used to load the firmware into the K3(among other things) , not
what the K3 is running
. The version of that would be more relevant to this discussion. The
current version is 3.68.
73, Mike NF4L
r...@aol.com
>>>Thoughts: I realize that all s-meters read differently and the fact that
the MP s-meter shows a 4 s-unit stronger signal above the noise level
doesn't
mean alot.
Correct, 4 S-units on an MP meter at that level is probably more like 2 real
S-units (10-12 dB). See below:
http://www.mail-
> With the K3 on default settings, its produces a sound that I do not like.
> I
> tailored the RX audio with the RX-equalizer and it sounds more pleasant to
> my ears now. Setting the IF filtering takes care of the rest.
Yes, the equalizer is a kind of remedy, but how about an embedded variable
AF
Dick,
You are right about the s-meter of the FT1K. Under S8 it cannot be trusted.
That is a fact. When I measured this on my MP a signal drop op 3 s-points
resulted in going from s8 to s1 or so on the meter, so that's about the same
as you see with yours.
About the noise, I have done a comparis
Hi Dick,
I have both a K3 and FT-1000MP. I agree that the K3 can have a somewhat
noisy behaviour leading to listening fatigue. I have the impression that the
various F/W versions in the past gave different AGC behaviour influencing
the "noisiness". I played quite a while with the AGC SLP and AGC
RLVZ wrote:
>
> Hi Guys,
>
> I'd appreciate your thoughts as to why my K-3 receiver is so noisy. I'd
> really like to make this radio perform. The radio is Serial #603F
> (factory
> model) running 1.2.10.27. I purchased the unit from the original owner a
> couple of months ago so I don't
Hi Guys,
I'd appreciate your thoughts as to why my K-3 receiver is so noisy. I'd
really like to make this radio perform. The radio is Serial #603F (factory
model) running 1.2.10.27. I purchased the unit from the original owner a
couple of months ago so I don't know if it's always been this n
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