K3 Data Overshoot

[Mike Harris-9]

Hi,

I have installed the latest firmware and notice the following:

At present I don't have PTT derived from the RS232 input and use VOX to
trigger the TX.  I notice that if for example the power is set to 40W,
when the VOX triggers there is a brief pulse of full power shown on the RF
meter there after it falls to the requested power.  This is confirmed by a
similar pulse and recovery in the output of the linear.

I'm using JT65A, the line in level is set to LINE 5, no ALC.  The level
from my sound card is at first bar from off on the Windows volume control.
The same happens even with some ALC bars activated.

I would be interested in what LINE "X" others are using.  Maybe I have to
attenuate the level from the sound card and us a higher LINE "X" setting.

Can this be replicated?

This was not apparent until I installed the latest firmware.

Regards,

Mike VP8NO

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[dj7mgq]

Hi Mike,

I've not seen exactly what you are reporting, but I have seen similar
behavior in the present and the previous firmware versions. These I
reported to Elecraft. I suggest you send a detailed description to
<[hidden email]>.

In my case, the misbehavior which was the most similar to yours, were
power spikes when barely moving the PWR knob in SSB and using the
transverter 0dBm output for a 144MHz transverter.

Every little bit of information can help in the debugging process.

vy 73 de toby
--
DD5FZ (ex 4n6fz, dj7mgq, dg5mgq, dd5fz)
K2/10  #885
K2/100 #3248
K3/100 #67
DOK C12, BCC, DL-QRP-AG, JN58td
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[Greg - AB7R]

Data spikes will happen if you do not set up correctly for data mode.
Please see the Operating Tips page on the Elecraft website.  If you over
drive with either the soundcard or the Line In control using MIC gain, you
will get spikes.  But if you follow the setup tip you should not see any.

73
Greg
AB7R


-----Original Message-----
From: [hidden email]
[mailto:[hidden email]]On Behalf Of Toby Deinhardt
Sent: Sunday, March 09, 2008 4:37 PM
To: Mike Harris
Cc: [hidden email]
Subject: Re: [Elecraft] K3 Data Overshoot


Hi Mike,

I've not seen exactly what you are reporting, but I have seen similar
behavior in the present and the previous firmware versions. These I
reported to Elecraft. I suggest you send a detailed description to
<[hidden email]>.

In my case, the misbehavior which was the most similar to yours, were
power spikes when barely moving the PWR knob in SSB and using the
transverter 0dBm output for a 144MHz transverter.

Every little bit of information can help in the debugging process.

vy 73 de toby
--
DD5FZ (ex 4n6fz, dj7mgq, dg5mgq, dd5fz)
K2/10  #885
K2/100 #3248
K3/100 #67
DOK C12, BCC, DL-QRP-AG, JN58td
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