I can leave the filter out but am wondering why it is blocking the
audio?
The AFSK TX filter is a narrow audio filter that allows only the
defined mark and space tones to pass. Check the PITCH setting in
AFSK A and make sure it matches the MARK setting in MMTTY (e.g.,
2125, 1275, 915Hz).
> I am
Ed,
I am not certain what you are referring to as the "AFSK TX filter".
You must enable the 2.7 or 2.8kHz filter for all DATA modes.
You can enable any filters for receive in any mode, but you cannot use
narrow filters for transmit.
73,
Don W3FPR
On 2/24/2019 1:40 PM, Ed G wrote:
After swit
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ed G
Sent: 24 February, 2019 10:41
To: elecraft@mailman.qth.net
Subject: [Elecraft] K3 AFSK TX Filter
After switching on the AFSK TX filter in the CONFIG menu, I find that the
filter essentially blocks all the soundcard audio from being transmitted by
the K3
After switching on the AFSK TX filter in the CONFIG menu, I find that the
filter essentially blocks all the soundcard audio from being transmitted by the
K3, so that I have no output with the filter switched on. Line In gain settings
are correct per recent suggestions by Joe, W4TV, and all other
All,
Thanks for your input and as a result I have several new ideas to
investigate.
Robie
On Mon, Nov 14, 2016 at 9:21 PM, Bill Conkling wrote:
> Check software. I have noted my software switches sub-modes when making
> changes. It has to do with mode selection and mapping softwre modes tot
Check software. I have noted my software switches sub-modes when making
changes. It has to do with mode selection and mapping softwre modes tot he
radio mode/sub-mode.
bill nr4c
> On Nov 13, 2016, at 11:40 PM, W0MU Mike Fatchett wrote:
>
> It doesn't solve you issue but the K3 is really goo
If the K3 is sending a steady carrier, by far the most likely explanation
is that it is in FSK D instead of AFSK A.
The data sub-mode is remembered per-band, so perhaps it is not set
correctly on all bands.
Another cause can be a logging program - for example, if you are using
MMTTY from within N
It doesn't solve you issue but the K3 is really good with FSK, ie clean.
RF? have you put ferrites on the cables with a number of turns? Does it
happen with 5 watts, 50 watts 100 or 1000 watts?
On 11/13/2016 8:47 PM, Robie Elms wrote:
All,
I have very limited experience with a K3 and I am
All,
I have very limited experience with a K3 and I am helping a fellow club
member get up and running on RTTY with his K3. Here is the setup:
1. We are using MMTTY in the AFSK mode
2. line in/out on the transceiver connected to the computer sound card mic
and speaker input/output
3. PTT is vi
On Thu,2/18/2016 6:30 PM, Mike Murray wrote:
If I recall correctly, the main signal was around S9 and the image at S7 or so.
I agree with W4TV that there is some sort of a setup problem. Things to
check: the assignment of the roofing filters, the settings for the
roofing filters, the position
To: "Wes (N7WS)"mailto:w...@triconet.org>>
Cc:elecraft@mailman.qth.net <mailto:cc%3aelecr...@mailman.qth.net>
Subject: Re: [Elecraft] K3 - AFSK anamoly? No replies, try again
Message-ID:
mailto:eavupuy_wf-lwz5_qoameh...@mail.gmail.com>>
Conte
; and the state of one is the inverted state of the other.
>
> 73,
>
> Bill - NA5DX
>
>
> Message: 23
> Date: Thu, 18 Feb 2016 09:56:06 -0700
> From: Mike Murray
> To: "Wes (N7WS)"
> Cc:elecraft@mailman.qth.net
> Subject: Re: [Elecraft] K3 - AFSK anamo
er.
73,
Bill - NA5DX
Message: 23
Date: Thu, 18 Feb 2016 09:56:06 -0700
From: Mike Murray
To: "Wes (N7WS)"
Cc:elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 - AFSK anamoly? No replies, try again
Message-ID:
Content-Type: text/plain; charset=UTF-8
After doing some more testing i
Don, as described that was NOT the opposite sideband. On the video the
stronger signal was at 14091.883 kHz on the dial. That is the frequency
of the mark tone; the space tone would have been at 14091.713 kHz. The
pitch in use was 915 Hz mark, so the suppressed carrier frequency would
be 14092.
Don,
If I recall correctly, the main signal was around S9 and the image at S7 or
so.
Mike
On Thu, Feb 18, 2016 at 5:30 PM, Don Wilhelm wrote:
> Mike,
>
> For strong signals the filtering may let some of the opposite sideband get
> through the filters.
> What is the relative S-meter reading for
Mike,
For strong signals the filtering may let some of the opposite sideband
get through the filters.
What is the relative S-meter reading for the true sideband and the
opposite sideband?
73,
Don W3FPR
On 2/18/2016 11:56 AM, Mike Murray wrote:
After doing some more testing in last weekends
Are you *absolutely sure* you are using the 400 Hz IF filter? By ear,
it sounds as if you have a wider IF filter that is centered on the
carrier and allowing the image to reach the DSP.
Since your display shows FL4, is it possible that you have all your
filters reversed?
73,
... Joe, W4TV
After doing some more testing in last weekends RTTY contest, it appears
that I made an erroneous statement as to what I was hearing and where.
What I found is that as I tune down in frequency and find a signal that
will decode, if I then tune down another 170 Hz I'll hear the inverted
signal. Stil
Assuming that when the OP says "tuning" he is turning the VFO knob, then here's
my take. All of the worry about roofing filters (gad how I hate that term) is
for nothing. The crystal filters in conjunction with so-called hardware AGC are
there to protect the delicate 2nd mixer from overload in
Maybe. The K3 offers so many ways to configure things, not all
combinations are guaranteed to be optimal. You might also try not using
the dual PB DSP, my experience has been that MMTTY and 2TONE decode a
bit better without it. I have the "stock" 2.7 KHz filter, and a 5-pole
500 Hz. I norma
Mike,
That effect should have nothing to do with the 1.8kHz filter.
I would go with Lyle's suggestion that it is the AGC that is allowing
you to hear the opposite sideband of strong signals.
To give that suspicion a quick check, turn off the preamp and add
attenuation, then reduce the RF Gai
Joe, et.al.,
I finally got back to the shack to check the setup. It looks like I was
actually using a 1.8 kHz SSB roofing filter in conjunction with the 500 Hz
dual PB DSP filter. I also checked the filter offsets which were all at
0.0 (all 8 pole) and I was using AFSK A mode. Is the effect I'm
Since I'm new to RTTY, I probably didn't describe my question in
correct terminology - I mainly only operate CW. I'll try again
And I'll ask my questions again ... what *ROOFING FILTER* and what DSP
bandwidth are you using?
As Eric said in reply to your posting, this sounds like the offse
Mike,
If you do find it is AGC that is producing that 'unwanted sideband'
response, you may want to investigate your AGC slope and threshold settings.
To give you some guidance, look at my webpage www.w3fpr.com article on
"Noisy K3". I would suggest that you set those AGC parameters in CW or
Mike,
It could be that the band is quiet, this is a strong signal (S7 or more)
and as you tune through to the opposite sideband the AGC is kicking up
the gain so you hear the signal down some 70 dB or so, but if it is a
strong signal on an otherwise fairly quiet band, you may hear it.
73,
L
Mike,
Is the mark tone in MMTTY set to the same frequency as you have set in
the K3?
IIRC, the default mark tone in MMTTY is 2175.
73,
Don W3FPR
On 1/6/2016 6:47 PM, Mike Murray wrote:
Bob, Joe, Bill & Mike,
Since I'm new to RTTY, I probably didn't describe my question in correct
terminolog
Bob, Joe, Bill & Mike,
Since I'm new to RTTY, I probably didn't describe my question in correct
terminology - I mainly only operate CW. I'll try again
I'm using DATA A/AFSK A, setup for low tones (915/170) and the RTTY dual-PB
filter. To illustrate what I'm hearing/seeing, imagine tuning do
This sounds like a crystal filter offset setting is incorrect. (Also check to
make sure your IF shift setting on the front panel is not set to an extreme.)
Check the setup menu entry for each crystal filter and its offset setting. 8
pole filters should be set to a zero offset. 5 pole filters sh
Seems strange to me. Don't or haven't noticed it with my K3S. I would
think they perform about the same in this regard.
73
Bob, K4TAX
On 1/6/2016 10:40 AM, Mike Murray wrote:
I played a bit in the RTTY RU this weekend with my new-to-me K3 to learn the
operation and iron out any kinks in my
I saw your original post. Im not sure I understand your question.
If you to the point where you are correctly lined up on both frequencies and
getting good decode as " zero-beat", yes you can hear the tones and possibly
even decide when listening to only one tone.
Sent from my iPhone
...nr4c.
It sounds to me as if you have selected an inappropriate roofing filter
or have improperly configured the filter offset.
What roofing filter are you using and what [DSP] bandwidth?
73,
... Joe, W4TV
On 1/6/2016 11:40 AM, Mike Murray wrote:
I played a bit in the RTTY RU this weekend with
I played a bit in the RTTY RU this weekend with my new-to-me K3 to learn the
operation and iron out any kinks in my setup. Everything worked well except
for a problem (?) on receive. I was able to easily tune in signals and
copy using MMTTY, but when I tuned to the other side of zero beat I could
Bottom quote below:
In the case of the K3, the FSK mode uses DSP-generated IF frequencies in
the 15 kHz range for the Tx, and simultaneously creates audio tones at
15kHz is audio frequency.
In AFSK mode, the radio requires that you supply audio to a Mic
connector or the Line In connector. T
David and all,
I would beg to differ, AFSK starts as external audio tones into an SSB
transmitter.
How those tones are modulated into an RF signal is not dependent on
whether the transceiver is DSP or analog, the output should be the
same. It may be digitized in the middle of the transceiver,
In the case of the K3, the FSK mode uses DSP-generated IF frequencies in
the 15 kHz range for the Tx, and simultaneously creates audio tones at
the selected pitch-pair.
In AFSK mode, the radio requires that you supply audio to a Mic
connector or the Line In connector. The AFSK Tx filter may o
While the K3 is an SDR, it generates FSK Mark and Space tones directly
at IF. There is no digitizing of audio tones from the input and
numerically mixing them to IF and filtering (or numerically cancelling)
the unwanted products.
The fact that the tones are created in response to a DC control i
On 04/12/14 18:20, Joe Subich, W4TV wrote:
The K3 does not generate AFSK internally. AFSK is only transmitted
in response to external audio.
But that is exactly how SDR architecture transmitters do generate FSK.
The only difference from what is popularly called AFSK is that the tone
starts
> The entry in the manual seems to indicate the filter is only
> active on afsk generated by the K3 internal afsk capability.
The K3 does not generate AFSK internally. AFSK is only transmitted
in response to external audio.
73,
... Joe, W4TV
On 2014-12-04 12:41 PM, Dave Barr wrote:
I h
I have heard that the configuration of AFSK TX - FIL ON/FIL OFF affects
afsk transmitted by feeding computer sound card generated afsk audio
tones. The entry in the manual seems to indicate the filter is only
active on afsk generated by the K3 internal afsk capability.Which is
correct?
___
From: "Joe Subich, W4TV"
To: Elecraft Reflector ; k6...@foothill.net
Sent: Sunday, January 5, 2014 8:50 PM
Subject: Re: [Elecraft] K3 - AFSK RTTY
In N1MM -> Config -> Configure Ports, Mode Control, Audi, Other ->
Mode Control ... make sure you have set the RTTY mode t
Yes, what you describes sounds like what happened to me when I switched
to 80 meters. I did have to click the 'reverse' button on Fldigi to
receive properly. Then when I tried to work stations, I got a lot of
'AGN.' I noticed the bargraph displays on the W2 watt meter kept
flashing. I final
In N1MM -> Config -> Configure Ports, Mode Control, Audi, Other ->
Mode Control ... make sure you have set the RTTY mode to *AFSK*
and not *RTTY* if you are using AFSK.
For more information read the very fine N1MM Logger on-line
documentation.
73,
... Joe, W4TV
On 1/5/2014 9:26 PM, Rick T
Here is one thing that will cause a similar problem: If you program a
memory while DATA MD is X, then every time you recall that memory you will
be put back into X, regardless of the DATA MD setting prior to the memory
recall. You might have set the memory years ago when using FSK D and now
are usi
What would a contest be if everything always worked like it did the last
time in the contest.
I use a minimalist RTTY setup:
2 stereo cables from LINE IN/OUT to LINE OUT/IN
AFSK-A with PTT from VOX
N1MM with one instance of MMTTY
Basically, it worked fine, made over 700 Q's. At the urging of
Hi Ron and the group
I hope you got your equipment to work on RTTY yesterday but if you didn't I
have been there and done that several times. I didn't see anyone else respond
so I will share some of my experiences.
The first thing on all Windows systems newer than XP, Right click SPEAKERS than
Are you in DATA A mode, or if not do you have compression turned up too far?
73 -KD0TSX
On Saturday, January 4, 2014, Ron W3ZV wrote:
> I am trying to operate AFSK on 15m in the ARRL RU contest. I have 2
> contacts in the last 2 hours. I am by no means a big gun, but I am usually
> better than
I am trying to operate AFSK on 15m in the ARRL RU contest. I have 2 contacts in
the last 2 hours. I am by no means a big gun, but I am usually better than
this. Lineup is K3-KPA500-KAT-500. No problems on receive. Drive is set to
produce about 350 watts from the KPA-500. SWR is below 1.5. As far
To Dick and John,
I have experienced the 75 baud problem that John described. I fixed it but
I'm not 100% sure how I did it. This tip might also work for the AFSK-A to
FSK-D problem. Here's my "guess" at what I did. After changing from 75 baud
to 45 baud on one band I would then change bands using
Along the same line, when I go back to RTTY, it comes up at 75 baud, where it
was last at FSK-D and 45 baud. I'm using the remote system if that makes any
difference.
John, N0IJ
Sent from my iPhone
On Sep 22, 2013, at 11:58 PM, r...@aol.com wrote:
> On my K3, I used to set each band to "AFS
On my K3, I used to set each band to "AFSK A" once, and when returning to
that band it would automatically revert back to "AFSK A". However,
something changed, as now each time I change bands the Mode is in the "FSK D"
mode.
Can someone tell me how I can get my K3 to remember to stay in t
On 9/24/2010 4:59 PM, JAMES ROGERS wrote:
> Here is what I think might be going on Fred. You have to set the roofing
> filters ON for each mode in which they may be used. It sounds like you
> have them setup for SSB but not for the modes you are using for RTTY.
> The easiest way to do that is wit
OK, this happens every time I set up my K3 for RTTY [CQ WW RTTY], even
though I've got two pages of stuff written in my station journal, it
still takes me a couple of hours to get it all right.
I'm in DATA AFSK A. Everything seems to finally be working. However,
it is "stuck" in FL1 which is
Lyle (KK7P) and I are working on a field-test firmware release that
corrects all known issues with AFSK A mode. We'll be sending it to
several customers this afternoon, and if all goes well it will be
released at beta by Wednesday.
73,
Wayne
N6KR
---
http://www.elecraft.com
_
Hi Lyle,
Thanks for your reply. A bit more investigation shows that
switching between AFSK A, DATA A, USB or LSB makes no difference
as far as the frequency offset is concerned.
What does make a difference is switching between Digital mode and
CW/SSB in N1MM...
In non Digital Modes the K3 VFO f
th.net] On Behalf Of Stewart Baker
> Sent: Monday, February 09, 2009 10:02 AM
> To: Elecraft Reflector
> Subject: [Elecraft] K3 - AFSK A
>
>
> I have been busy setting up MMVARI together with N1MM to use in
> RTTY contests. I have not encountered any real problems, however I
>
Hello Stewart!
Be sure you use the PITCH control to select the tone pair you desire to
use. The K3 will then display the RF frequency corresponding to the RTTY
Mark tone. As you change pitches, the frequency display won't alter but
the offset of the radios suppressed carrier will move in accor
I have been busy setting up MMVARI together with N1MM to use in
RTTY contests. I have not encountered any real problems, however I
am a little confused when it comes to using the K3 in the AFSK A
mode.
I am using this mode because it always has the RTTY LSB selected
as default. The audio tones
It's crunch time for the RTTY WPX...
Can I assume that the K3 AFSK mod problems remain unresolved as of today?
Ty K3MM
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> CQ WPX RTTY is getting close... have the AFSK problems been fixed yet or
> are we close to solutions?
The AFSK Tx tone item is #3 on my task list.
73,
Lyle KK7P (just back from VK6)
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CQ WPX RTTY is getting close... have the AFSK problems been fixed yet or are we close to solutions?Ty K3MM
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All cables were removed, other than the LINE IN into the radio, including
the line out. Headphones were worn to listen to the monitor audio. (Okay,
so I didn't mention the headphones, but they are electrically isolated from
everything else.)
Chad WE9V
On Sun, Nov 23, 2008 at 9:41 PM, K8TB <[EMA
One other thought. Are you using the line out to drive your soundcard?
And if so, is your monitor level turned up on the K3? And if so, is
anything in your computer, digital mode software, allowing the incoming
sound card audio to be mixed with the outbound audio? Each software
package and audi
Okay, all good suggestions. Thanks Jim and Joe.
I didn't stop at just removing the RS-232 cable. I removed EVERY cable to
the K3 other than the single cable for audio in. (I kept the grounding
braid and antenna, but still tested using the TX TEST mode, no RF.)
Tried the FP mic connector. Same
On Sun, 23 Nov 2008 19:54:24 -0500, Joe Subich, W4TV wrote:
>It us likely that
>the ticking is the computer polling the radio. You will find
that
>is due to ground loop ("pin 1") problems.
Ah! That's a source I hadn't thought of, but it's a perfect
example of a "pin 1 problem" -- you inject
, 2008 6:08 PM
> To: Jim Brown; elecraft@mailman.qth.net
> Subject: Re: [Elecraft] K3 AFSK RTTY overdrive - no ALC
>
>
> Jim,
>
> Thanks. I've seen and read your document previously. Is
> there something specific you are referring me to in your
> document that
Because I use the same mic input during SSB operation, keeping the
configuration the same regardless of what radio is in that position. The K3
is the only radio that has a line in. And, I did try using the line in to
troubleshoot this problem. Due to the 20dB attenuator that I'm using, I had
to
Just wondering, why not use the line in instead of the microphone input?
vy 73 de toby
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http://mai
Jim,
Thanks. I've seen and read your document previously. Is there something
specific you are referring me to in your document that I already haven't
covered? Let me recap and add a couple points of clarification:
* It's not an RF problem, as it still exists in TX TEST mode.
* I do not have a
On Sun, 23 Nov 2008 11:37:17 -0600, Chad WE9V wrote:
>Any ideas out there?
Lots.
http://audiosystemsgroup.com/HamInterfacing.pdf
73,
Jim K9YC
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l Message -
> *From:* Chad WE9V <[EMAIL PROTECTED]>
> *To:* elecraft@mailman.qth.net
> *Sent:* Sunday, November 23, 2008 9:37 AM
> *Subject:* [Elecraft] K3 AFSK RTTY overdrive - no ALC
>
> I'm no stranger to soundcard RTTY or to my K3, but today I decided to mix
> the
I'm no stranger to soundcard RTTY or to my K3, but today I decided to mix
the two and fire up MMTTY on the K3. The first thing I noticed is that
there was a very strange ticking sound in the monitor. While it was
difficult to hear on frequency on another radio, you could hear clicking
off-frequen
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