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K3 Overdrive using RTTY

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Doug Alspaugh

K3 Overdrive using RTTY

Lyle,

With the current (276/198) I am not able to adjust the sound card input for a clean signal no matter how low I set the drive. I get the clicking sound in the monitor output and if I listen on a second rig I can hear clicking by tuning just off freq. I also tried 273/198 and got the same results. However I can get a clean output using 267/196. Takes very careful adjustment. I get one solid bar and one flickering bar on the ALC meter. One more click of input from the sound card and the clicking starts. With the proper adjustment the output sonds clean on my second radio.

73 Doug N3QW

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Doug Alspaugh

Re: K3 Overdrive using RTTY

Hi Mike,

Yes, I have contributed to that thread. The thread I started had two purposes. One to let Lyle know I think the problem is worse in DSP version 198 and two, to illustrate a possible work around for those who would like to work the Roundup this weekend.

73 Doug N3QW

----- Original Message -----
From: "K2MK" <[hidden email]>
To: [hidden email]
Sent: Friday, January 2, 2009 11:39:23 AM GMT -05:00 US/Canada Eastern
Subject: RE: K3 Overdrive using RTTY

Hi Doug:

Take a look at the thread started yesterday titled "Obscure RTTY Bug"
Sounds like the same problem except you put a new spin on it. No solution
yet unfortunately.

73,
Mike K2MK

[Elecraft] K3 Overdrive using RTTY

Doug Alspaugh
Fri, 02 Jan 2009 06:04:00 -0800

Lyle,

With the current (276/198) I am not able to adjust the sound card input for
a
clean signal no matter how low I set the drive. I get the clicking sound in
the
monitor output and if I listen on a second rig I can hear clicking by tuning
just off freq. I also tried 273/198 and got the same results. However I can
get
a clean output using 267/196. Takes very careful adjustment. I get one solid
bar and one flickering bar on the ALC meter. One more click of input from
the
sound card and the clicking starts. With the proper adjustment the output
sonds
clean on my second radio.

73 Doug N3QW

Mike K2MK

RE: K3 Overdrive using RTTY

In reply to this post by Doug Alspaugh

Doug:

I can confirm that changing back to the earlier revision levels and reducing
the MIC level to 1 or 2 ALC bars eliminated the crackling noise on my unit.

First I reloaded just the two 1.96 DSP files and that did the trick. Then I
thought better of it and also reloaded the 2.67 MCU and 0.02 FPF files.

Thanks for the tip Doug. This will hold me over until Lyle and Wayne fix it
permanently.

73,
Mike K2MK

[Elecraft] K3 Overdrive using RTTY
Doug Alspaugh
Fri, 02 Jan 2009 06:04:00 -0800

Lyle,

With the current (276/198) I am not able to adjust the sound card input for
a
clean signal no matter how low I set the drive. I get the clicking sound in
the
monitor output and if I listen on a second rig I can hear clicking by tuning
just off freq. I also tried 273/198 and got the same results. However I can
get
a clean output using 267/196. Takes very careful adjustment. I get one solid
bar and one flickering bar on the ALC meter. One more click of input from
the
sound card and the clicking starts. With the proper adjustment the output
sonds
clean on my second radio.

73 Doug N3QW

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Doug Alspaugh

Re: K3 Overdrive using RTTY

Mike,

Great!! and thanks for sharing on the reflector. Should give Wayne and Lyle a place to start looking too.

73 Doug N3QW

----- Original Message -----
From: "K2MK" <[hidden email]>
To: [hidden email], "Elecraft Reflector" <[hidden email]>
Sent: Friday, January 2, 2009 3:56:27 PM GMT -05:00 US/Canada Eastern
Subject: RE: K3 Overdrive using RTTY

Doug:

I can confirm that changing back to the earlier revision levels and reducing
the MIC level to 1 or 2 ALC bars eliminated the crackling noise on my unit.

First I reloaded just the two 1.96 DSP files and that did the trick. Then I
thought better of it and also reloaded the 2.67 MCU and 0.02 FPF files.

Thanks for the tip Doug. This will hold me over until Lyle and Wayne fix it
permanently.

73,
Mike K2MK

[Elecraft] K3 Overdrive using RTTY
Doug Alspaugh
Fri, 02 Jan 2009 06:04:00 -0800

Lyle,

With the current (276/198) I am not able to adjust the sound card input for
a
clean signal no matter how low I set the drive. I get the clicking sound in
the
monitor output and if I listen on a second rig I can hear clicking by tuning
just off freq. I also tried 273/198 and got the same results. However I can
get
a clean output using 267/196. Takes very careful adjustment. I get one solid
bar and one flickering bar on the ALC meter. One more click of input from
the
sound card and the clicking starts. With the proper adjustment the output
sonds
clean on my second radio.

73 Doug N3QW

Steve Ward

RE: K3 Overdrive using RTTY

In reply to this post by Doug Alspaugh

I'm wondering if this is related to the increase in drive on DATA-A mode
as well. Seems both happened about the same time...

73,
Steve AD7OG
K3 #1544
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Chad WE9V

Re: K3 Overdrive using RTTY

In reply to this post by Doug Alspaugh

As I stated earlier, I have/had a similar problem reported back in
November, but didn't get anywhere with a solution. Some recently
mentioned turning off the internal RTTY decoder (TEXT DEC) or Dual PB
filters improved their problem. I'm finally back at my rig today and
was ready to try some older firmware versions, but the first thing I
did was to try turning off the internal RTTY decoder and MY PROBLEM IS
FIXED!! This is with the latest firmware, 276/198.

I found something strange....on 10M, the signal is fine even if the
decoder is turned on, but it's bad on 15/20/40/80 with the decoder on
and fine with it off. Maybe this can help Lyle/Wayne troubleshoot the
problem.

Chad WE9V

On Fri, Jan 2, 2009 at 8:03 AM, Doug Alspaugh <[hidden email]> wrote:

> Lyle,
>
> With the current (276/198) I am not able to adjust the sound card input for
> a clean signal no matter how low I set the drive. I get the clicking sound
> in the monitor output and if I listen on a second rig I can hear clicking by
> tuning just off freq. I also tried 273/198 and got the same results. However
> I can get a clean output using 267/196. Takes very careful adjustment. I get
> one solid bar and one flickering bar on the ALC meter. One more click of
> input from the sound card and the clicking starts. With the proper
> adjustment the output sonds clean on my second radio.
>
>
>
> 73 Doug N3QW
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft
>
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>