rf gain

[terry220]

hi
i have just received my k3 from waters&stanton here in the uk.i have a slight problem
with the rf gain on receive if you turn the rf gain contril fully clockwise the signal goes
in negative mode instead of peeking it goes in reverse.it peeks when control is set to
about 12 o"clock strange is there an easy fix for this

[Stan Gibbs, KR7C]

Try running the parameter initialization process, following the instructions on page 66 of the latest owners manual.  My K3 had this behavior at one time and it was corrected by running EE INIT.

[Don Wilhelm-4]

I would discourage one from arbitrarily doing an EEINIT" unless you have
a stored K3 configuration file that you can load afterward.

EEINIT sets all menu items back to the default settings.  It may be
necessary, but do know that you will have a lot of calibration to do
unless you have that configuration file with the settings from a known
good working time for your K3 (goes for KX3 too).

73,
Don W3FPR
.
On 8/26/2012 7:46 PM, Stan Gibbs wrote:
> Try running the parameter initialization process, following the instructions
> on page 66 of the latest owners manual.  My K3 had this behavior at one time
> and it was corrected by running EE INIT.
>
>

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[Mike K2MK]

Hi Terry,

Try running the RF Gain calibration from the K3 Utility Program.

73,
Mike K2MK

terry220 wrote

hi
i have just received my k3 from waters&stanton here in the uk.i have a slight problem
with the rf gain on receive if you turn the rf gain contril fully clockwise the signal goes
in negative mode instead of peeking it goes in reverse.it peeks when control is set to
about 12 o"clock strange is there an easy fix for this

[Stan Gibbs, KR7C]

Yes, Don, an EE INIT is not something one should do "arbitrarily".  It did fix a similar non-linear RF gain problem of that myself and others reported on this reflector back in 2010, so I suggested it as a solution.

The process in the owners manual makes clear that a saved configuration is a very important step if one does not want to undertake a lot of parameter setting and calibration.

As to running the RF gain calibration, this did not solve the non-linearity for me, but the EE INIT did.

[terry220]

hi
thanks everyone for your help i will try these suggestion later today as it is
after midnight here.i will let you all know later.thanks terry

[terry220]

hi
no luck,tryed all suggestion but still the same not sure what to do next may be contact
support thanks every one.terry220

[Stan Gibbs, KR7C]

Terry,

Here is a link to a 2010 thread about this issue:
http://elecraft.365791.n2.nabble.com/K3-Rf-gain-tracking-main-vs-sub-td5668917.html

The thread doesn't document the resolution (for me, EEINIT), unfortunately, but there is an interesting graph of the behavior by one of the contributors (HB9BRI) who also experienced the issue.

Perhaps there is some information in the thread that will be of help.

Did you verify that the behavior is still present after an EEINIT but BEFORE you reloaded your configuration? (I'm assuming that you did an EEINIT, of course).

[terry220]

hi stan
yes the problem was still there before and after.i would like to mention that
i am not using the usb cable from elecraft would this make any difference.although it
seems to work ok when using the k3 utly.terry

[terry220]

hi
thanks everybody for there suggestion but still no go.just like to add
the rf gain control does not cut the gain much turning ccw when you
increase the control clockwise it acts really funny when in the 9.oclock
position it burst into life.just like as if somebody add turn of the mute control
thanks.also when fully cw the noise in the receiver is loud even withe no antenna
conected.but i dont have another k3 to do compare with.terry