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K3 competition from Icom?

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Robert Paull

Re: K3 competition from Icom?

oops, sorry about that I was looking at the 7700...I guess they have not posted it yet...thanks all for the heads up...as he crawls back into his cave only to resurface later when the lights are down.

Thanks
Bob Paull
KK6UE
k3 681

--- On Tue, 8/26/08, S Sacco <[hidden email]> wrote:

> From: S Sacco <[hidden email]>
> Subject: Re: [Elecraft] K3 competition from Icom?
> To: [hidden email]
> Date: Tuesday, August 26, 2008, 7:05 AM
> Ummm.....Bob?
>
> You may want to take another look at the specs on the
> IC-7600, and
> revise your statement.
>
> 73,
> Steve NN4X
>
>
>
> On 8/26/08, Robert Paull <[hidden email]> wrote:
> > Hi All:
> > One last thing about the new Icom, if you want a 50 lb
> rig that runs on 85-250 volts...Not a bad purchase. But I
> would be stuck with the 60 lb generator and lots of gas on
> field day not just a battery.
> >
> > 73's
> > Bob Paull
> > KK6UE
> > K3 681
> >
> >
> > --- On Mon, 8/25/08, David Wilburn
> <[hidden email]> wrote:
> >
> > > From: David Wilburn
> <[hidden email]>
> > > Subject: Re: [Elecraft] K3 competition from Icom?
> > > To: "Elecraft Discussion List"
> <[hidden email]>
> > > Date: Monday, August 25, 2008, 5:16 PM
> > > Good point. I am often amazed with concerns
> about birdies.
> > > I have
> > > several networks, and multiple computers and
> other
> > > equipment within
> > > feet of the K3. I have birdies all over the
> place. But
> > > none of them
> > > have gotten in the way when I was operating. But
> fully
> > > understand
> > > many do not have any of this in the shack.
> > >
> > > David Wilburn
> > > K4DGW
> > > www.k4dgw.com
> > > www.k4rc.net
> > > Williamsburg Area Amateur Radio Club (K4RC)
> > >
> > > My Current LOTW/DXCC/WAS status
> > > www.k4dgw.com/WAS.DXCC.info.html
> > >
> > >
> > >
> > > Brett Howard wrote:
> > > > But with what we have (an RS232 port) and
> nicely
> > > isolated line level
> > > > in/outs you can have all of that capability
> and you
> > > don't have all of
> > > > that noise generating equipment inside the
> box with
> > > your sub microvolt
> > > > sensitive receiver. Its not a LOT better
> but its
> > > definitely the way I
> > > > prefer it....
> > > >
> > > > On Mon, Aug 25, 2008 at 2:02 PM, Julian,
> G4ILO
> > > <[hidden email]> wrote:
> > > >>
> > > >>
> > > >> Ken N9VV-2 wrote:
> > > >>> Hi David, it looks like you can even
> find
> > > SERIAL <---> Ethernet
> > > >>> adapters
> > > http://www.industrialethernet.com/net232-dte.html
> > > >>> de Ken N9VV
> > > >>>
> > > >>>
> > > >> If I was asked to vote for an
> alternative
> > > interface I'd vote for Ethernet.
> > > >> But in that case I'd also like to
> have
> > > streaming audio in and out of it.
> > > >> Being able to remote control a radio is
> not a lot
> > > of use unless you can get
> > > >> audio in and out as well, and if you
> need a
> > > computer to handle that then you
> > > >> might as well use it also to handle the
> CAT
> > > commands.
> > > >>
> > > >> -----
> > > >> Julian, G4ILO. K2 #392 K3 #222.
> > > >> http://www.g4ilo.com/ G4ILO's Shack
> > > http://www.ham-directory.com/ Ham
> > > >> Directory
> http://www.g4ilo.com/kcomm.html KComm
> > > for Elecraft K2 and K3
> > > >> --
> > > >> View this message in context:
> > >
> http://n2.nabble.com/K3-competition-from-Icom--tp781209p782470.html
> > > >> Sent from the Elecraft mailing list
> archive at
> > > Nabble.com.
> > > >>
> > > >>
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Stephen Prior

Re: KX-1 BC interference on 20m

In reply to this post by Don Wilhelm-4

Hello Don

I certainly wouldn't want to give the impression that I'm not really pleased
with the KX-1 because it's given me a huge amount of pleasure in a
relatively short length of time.

I think I may have hit upon something- the KX-1 received a knock when
camping and I have now discovered that the knock broke both solder joints
for the ground connection on the bnc socket. Looking at them they seemed
dry anyway and now they have been resoldered the problem has all but
disappeared. I'm not looking for a perfect transceiver of course, but the
BC stations were fairly intrusive and if I've got that sorted now then I
shall be happy.

Thanks to all for the advice received!

73 Stephen G4SJP

On 26/08/2008 00:51, "Don Wilhelm" <[hidden email]> wrote:

> Stephen and Ed,
>
> I was thinking along those same lines. On 20 meters, the KX1 LO signal
> is below the RF signal, so a strong BC station in the 4.1 to 4.3 MHz
> range could push itself through and be heard on the upper end of the 20
> meter band. If you have no stations on that part of the spectrum, you
> can likely reject the assumption of an image response.
>
> The KX1 design faced many challenges in order to stuff all that
> performance in a small space, so the design is a bit of a compromise.
> The front end suffers from responses in the presence of strong RF energy
> just like any other Gilbert cell mixer connected in the receiver front
> end (with no RF amp stage for isolation). My understanding is that the
> Gilbert cell mixer can generate 'funny stuff' in the presence of strong
> RF energy fields like might be found in Europe - in reading EMRFD, I
> find that Wes Hayward does not even recommend the gilbert cell mixer for
> use in receivers that will be used on the Eastern side of the US for
> this very reason.
> In addition, the DDS does have some spurs that can be mysterious - if
> the offending signal tunes more quickly than normal signals, you are
> likely hearing the result of one of the DDS spurs.
> The KX1 is a good design, but it just is not perfect in all ways. You
> may be hearing the result of one of these imperfections - OTOH, you
> *could* have a problem there. Comparison with another KX1 under the
> same circumstances is one way of telling whether a problem exists or it
> is just one of those design compromise situations.
>
> 73,
> Don W3FPR
>
> Ed - K9EW wrote:
>> Hi Stephen,
>>
>> It might help if you could identify the SW stations you're hearing,
>> and find out what frequency they're on. What you could be hearing is
>> a very strong signal on the receiver's image frequency, and the only
>> thing you could do would be to add more selectivity to the front end
>> to attenuate the signal on the image frequency. Ask Elecraft, they
>> would know.
>> 73,
>> ed - k9ew
>> www.k9ew.us\
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>

Don Wilhelm-4

Re: KX-1 BC interference on 20m

Stephen,

Yes, a poorly connected BNC shell could act as a mixer itself and cause
all sorts of wierd happenings - especially within a strong RF field as
exists in Europe with those BIG broadcast stations.

73,
Don W3FPR

Stephen Prior wrote:

> Hello Don
>
> I certainly wouldn't want to give the impression that I'm not really pleased
> with the KX-1 because it's given me a huge amount of pleasure in a
> relatively short length of time.
>
> I think I may have hit upon something- the KX-1 received a knock when
> camping and I have now discovered that the knock broke both solder joints
> for the ground connection on the bnc socket. Looking at them they seemed
> dry anyway and now they have been resoldered the problem has all but
> disappeared. I'm not looking for a perfect transceiver of course, but the
> BC stations were fairly intrusive and if I've got that sorted now then I
> shall be happy.
>
> Thanks to all for the advice received!
>
> 73 Stephen G4SJP

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