I wonder if this thread is related to the thread about TX Gain
calibration, from which it seems to have forked.
If the TX gain calibration hasn't been done properly, or the conditions
are not similar (e.g. the PA is not providing a 50 ohm resistive load,
or there is a significant operating tem
Hi ALL
I just wanted to add my experiences with SPIKES. My K3 is
absolutely clean NOW. I say NOW because I did have a similar
experience and after a lot of testing with my Peak SWR meter I finally
traced the problem to my MIC. I was using an amplified Kenwood MC-60.
I stopp
Toby
A couple of thoughts - have you looked at the power supply regulation - it
might be reacting badly to the sudden key down. The other thought is
whether RF is getting into something - this can cause all manner of strange
effects, I've even had multimeters giving nonsense measurements through R
Hi,
Spikes are visible on both power meter on K3 and I can see on external Watt
meter including "error message" from automatic amplifier which get response
- Overdrive Input is to high!
I am forward message from Elecraft support!
it is helpful to press TUNE when the rig is first switched on, for
Notice that Graham mentioned that his 'peak reading meter' indicated
overshoot, but that no overshoot was seen on an oscilloscope.
If your only indication is from a peak reading meter, that may be an
anomaly of the meter and not any problem with the K3.
Most reports of 'overshoot' that I have rea
Some spike, some don't.
Charles Harpole
[EMAIL PROTECTED]
> Date: Fri, 26 Sep 2008 05:41:47 -0700
> From: [EMAIL PROTECTED]
> To: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] K3 RF-out spikes, was: K3 SSB Power Control and
> ALCMetering
>
>
> Hi all!
Hi all!
I a have the same problem with my K3 S/N 1577, V2.38. DSP1.90 spikes are
visible on all bands specially on SSB first second transmitting! It is very
interesting indeed
73,
E72X,
dj7mgq wrote:
>
> Hello Graham,
>
> thanks for taking another look. It sounds like your K3 is behav
Hello Graham,
thanks for taking another look. It sounds like your K3 is behaving correctly.
I hope to update my firmware before the big RTTY contest this week
end, which means I could check my K3 (again) as well. If I still see
any errors, then one can assume that it likely is not a bug in t
er 26, 2008 10:53 AM
Subject: Re: [Elecraft] K3 RF-out spikes, was: K3 SSB Power Control and
ALCMetering
> Hallo Graham,
>
> thank you for looking at this with a scope.
>
> Did you try changing the power level while you were in SSB at lowish
> power, e.g. from 30W to 35W? This (at
Hallo Graham,
thank you for looking at this with a scope.
Did you try changing the power level while you were in SSB at lowish
power, e.g. from 30W to 35W? This (at least it used to) usually caused
my K3 to settle in on a power level which tended to be between 3db and
10dB lower than reque
meter movement.
Graham G3TCT
- Original Message -
From: "Charles Harpole" <[EMAIL PROTECTED]>
To: "Kamal Sirageldin" <[EMAIL PROTECTED]>;
Sent: Thursday, September 25, 2008 3:48 AM
Subject: [Elecraft] K3 RF-out spikes,was: K3 SSB Power Control and ALC
Meterin
Yep, my recently factory re-done K3-100F #309 also
has RF output power spikes upon first key down or
first SSB word spoken. The spike appears to be
at fully 120 watts when rig is adjusted to 50 watts.
When oh when will this rig be at least half way
done? 73,
Charles Harpole
[EMAIL PROTE
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