Bob McGraw - K4TAX
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Any selectivity on your behalf to keep from getting rumblings you
are QRMing him is most likely due to his receiver. Or perhaps he
is not correctly using the features of his receiver. Good
chances your signal is simply overloading the receiver front end
and causing IMD. Perhaps you need to share with him my writing
regarding Obtaining Optimum Receiver Performance.
As to the Alpha 8410, I would be sure it is operated in its very
linear range, thus make sure tuning and loading is absolutely
correct as any slight mis-adjustment can cause IMD issues. And
make sure the drive applied is such that the PEP output does not
exceed 1500 watts.
Again, I view the neighbors problem with QRM from your station
is the TS-890 is related to the receiver.
On 11/2/2019 9:02 PM, Christopher
Scibelli via Groups.Io wrote:
you not notice a difference on receive between the K3 and K3S,
or simply feel the difference isn't worth the money?
I ask the question because I have two hams who are very close
to me. The one on the next street over is within a 7 iron
shot, but he doesn't have a beam and he mostly stays on 80
meters with a small amp., whereas I hardly use 80 meters. The
ham two streets over has a small beam on a roof tower, a
KPA500 and a Kenwood TS-890. During the 10 meter contest I
usually have to get about 50 khz away from him, but I'm
getting rumblings that I may be QRMing him on the whole band.
We aren't close friends so we rarely speak and he's not very
active. I use an Alpha 8410, and a 10 Element tribander atop
a 55 foot US Tower.
I was hoping for some more selectivity but if it's just a dB
or two, I would just keep the rig as a K3.
Thanks and 73,
From: Wes Stewart via Groups.Io
To: Elecraft-K3 <Elecraft-K3@groups.io>
Sent: Sat, Nov 2, 2019 8:47 pm
Subject: Re: [Elecraft-K3] K3S to be discontinued
I would pop the HPA in and out a few times, maybe with
some contact cleaner and maybe do the same with the front
panel, although I'm not sure about this. You have the ATU
so this might not apply, but I don't and have found that the
ground return to the output connector is via a standoff and
screw and is really iffy. I added a solder lug and a jumper
wire to fix that intermittent.
Otherwise, I wouldn't spend the bucks for any upgrade unless
you are a 6 or 10-meter op and need the preamp. I say all
of this as the owner of both a K3 and a K3S.
On Sat, Nov 2, 2019 at 04:41 PM, Christopher Scibelli wrote:
I have a K3, Serial # is about 2340, and it
needs to be repaired. I'm getting the "12V Error" which
Elecraft told me is due to not having gold contacts in the
PA section of the rig. I can only get 12 watts of output,
but for about a year this was intermittent. Now, RF power
never reverts to the nominal 100 watts. It's always 12
I think they also said some of the front panel buttons
needed to be replaced with gold panel contacts as well,
but this conversation was over 6 months ago and things
were delayed due to medical issues.
I was told I'd be responsible for about 2 hours of lab
time which I can afford. However, I, too, was going to
have upgrades done so my K3 is as close to a K3S as
What mods did you have done to your K3 and what was the
total bill? I have a fully loaded K3 aside from the 2nd
receiver. 5 INRAD filters, the ATU, voice recorder,
general coverage receiver, and all other options aside
from the 2nd receiver which from my 10 years with the rig
is something I've decided I can do without.
I do need this repaired so I feel I may as well have some
K3S mods done while Elecraft has my rig.