[K3] RTTY Questions

[John Reilly-3]

I have two K3 questions:
    1. In Data MD, AFSk A, you can set the baud rate to either 45 or 75.
Is the baud rate just for the RTTY reader? Does it affect anything else?
    2. With my K3s power set to 100w, RTTY starts at a little below 50w
and and then fairly slowly builds to 100w (measured on an external
wattmeter). I've done a TX calibration -- no change. What is going on?

Thanks,
   - 73, John, N0TA
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

[k6mrmagnet]

My radios only do the power ramp up the first time you transmit after changing bands.  Doesn’t take that long though.  Less than one second I would guess.  As noted, it’s the power control loop.  Usually it’s not that noticeable.

Ken K6MR

From: John Reilly<mailto:[hidden email]>
Sent: Thursday, April 29, 2021 20:21
To: [hidden email]<mailto:[hidden email]>
Subject: [Elecraft] [K3] RTTY Questions

I have two K3 questions:
    1. In Data MD, AFSk A, you can set the baud rate to either 45 or 75.
Is the baud rate just for the RTTY reader? Does it affect anything else?
    2. With my K3s power set to 100w, RTTY starts at a little below 50w
and and then fairly slowly builds to 100w (measured on an external
wattmeter). I've done a TX calibration -- no change. What is going on?

Thanks,
   - 73, John, N0TA
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

[Bob Wilson, N6TV]

On Thu, Apr 29, 2021, 8:20 PM John Reilly <[hidden email]> wrote:

> I have two K3 questions:
>     1. In Data MD, AFSk A, you can set the baud rate to either 45 or 75.
> Is the baud rate just for the RTTY reader?


Yes

Does it affect anything else?
>

No.

    2. With my K3s power set to 100w, RTTY starts at a little below 50w
> and and then fairly slowly builds to 100w (measured on an external
> wattmeter). I've done a TX calibration -- no change. What is going on?


You may have lost a final.  How to confirn (TNX WE6R):

1. Mode: SSB
2. Band: 160m
3. Power: 10W
4. Speak into the microphone and listen on another receiver.
5. Continue speaking while listening on the other receiver and slowly
increasing the power.
6. If the received audio becomes terribly distorted once you get above 13
or 14 watts, it usually means that you need to have the unit repaired to
replace a final.

GL.

73,
Bob, N6TV
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

[Wes Stewart-2]

Are you using an external RTTY program, e.g. MMTTY?  If not and you're using the
internal CW to RTTY feature, I can't help you.  Otherwise I'm assuming audio
input via Line In.  Baud rate is set in the program.

Make sure the audio drive, set by 1) soundcard level and 2) "Mic" gain, drive
the ALC indicator to four bars.  Less and the power control loop will try to
adjust, but it does this slowly. Otherwise it could be a blown final, in either
of the PAs (regrettably too common) or a mistuned BPF.  I don't know how common
this is but it happened to mine.

Wes  N7WS

On 4/29/2021 8:18 PM, John Reilly wrote:

> I have two K3 questions:
>    1. In Data MD, AFSk A, you can set the baud rate to either 45 or 75. Is the
> baud rate just for the RTTY reader? Does it affect anything else?
>    2. With my K3s power set to 100w, RTTY starts at a little below 50w and and
> then fairly slowly builds to 100w (measured on an external wattmeter). I've
> done a TX calibration -- no change. What is going on?
>
> Thanks,
>   - 73, John, N0TA
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]