[Amps] K3 spike problem
Alek Petkovic
vk6apk at bigpond.com
Thu Aug 16 05:32:56 PDT 2012
No worries Bob.
Cheers from cool sunny Perth.
Alek. VK6APK
On 16/08/2012 8:27 PM, Bob Henderson wrote:
> It seems we have different interpretations of the same material. I
> didn't think anyone was blaming Charles. I just saw helpful pointers
> towards a solution.
>
> However, I observe Charles is prone to stir folks emotions with
> sweeping statements of condemnation. He gave the Alpha 87A similar
> treatment last month.
>
> He isn't required to make any adjustment. He has a choice. He can
> follow the very easy to follow Elecraft instructions, checking the
> appropriate adjustments OR he can speak to Elecraft about sending his
> K3 back to them for checking. If he opts to check the adjustments
> himself and that doesn't fix the problem he can still arrange to
> return it to Elecraft for their attention.
>
> I have never needed to send anything back to Elecraft and have heard
> only good things about their customer service.
>
> We might have worked. I am very active, mostly CW. OTOH the majority
> of Cyprus hams currently active have calls in the 5B4A** series so you
> might easily be thinking of someone with a similar call.
>
> Concerning your hands on experience with the K3. We all appear stupid
> until we review the manual. I think this observation pretty much
> applies to all modern transceivers regardless of manufacturer.
>
> 73 Bob, 5B4AGN
>
> On 16 August 2012 11:36, Alek Petkovic <vk6apk at bigpond.com
> <mailto:vk6apk at bigpond.com>> wrote:
>
> G'day Bob.
>
> On the contrary. Several posters stated or implied that K3s did not
> overshoot at all.
>
> A couple of posts blamed Charles for the problem in that he did not do
> the proper calibration or alignment procedure.
>
> It is still my belief that Charles should NOT be required to make
> any of
> these adjustments if he bought a factory finished product. That is the
> whole issue here and the only point that I was trying to make
>
> Also, it is arguable that any realignment or calibration will not fix
> Charles' problem because, from what he has described, the problem is
> only evident on initial key up and subsequent keying only after a long
> rest period. Perhaps his radio does have a genuine fault.
>
> I don't profess to know jack about the K3 nor have I ever read
> anything
> about its problems, real or perceived. I tried to use one many times
> while I was member of a local club but I was just too stupid to even
> begin to understand how to operate it.
>
> 73 and your call looks familiar. Maybe we've exchanged reports on cw.
> I've certainly seen you spotted on the cluster anyway.
> Alek. VK6APK
>
>
> On 16/08/2012 6:21 PM, Bob Henderson wrote:
> > So who is telling Charles his K3 doesn't suffer overshoot. I
> don't see
> > anyone though I see plenty of folks drawing Charles attention to the
> > fact that their K3s don't exhibit this problem. I have also seen
> > helpful references to the K3 manual concerning how to check the
> set up
> > to avoid overshoot. No test equipment required.
> >
> > I also have 2 x K3 and as it happens an Alpha 87A which has given
> > great service since I bought it in early 1994. My Alpha87A doesn't
> > complain when driven with either of my K3s.
> >
> > If I were Charles I would refer to the K3 set up instructions.
> >
> > So far as I am aware, the thing Charles said which has been disputed
> > is that the K3 generally is known to suffer from overshoot problems.
> > I am among those who dispute this statement, although I will
> > acknowledge any transmitter improperly aligned may suffer from this
> > effect.
> >
> > Best to read what is actually written rather than that which might
> > have been.
> >
> > 73 Bob, 5B4AGN
> >
> > On 16 August 2012 09:16, Alek Petkovic <vk6apk at bigpond.com
> <mailto:vk6apk at bigpond.com>
> > <mailto:vk6apk at bigpond.com <mailto:vk6apk at bigpond.com>>> wrote:
> >
> > Why are you all trying to tell Charles that the K3 has no
> > overshoot when
> > he has told you that it does? He has described the exact
> conditions
> > under which it does it and he has stated that the radio is
> factory
> > assembled and therefore, factory tested and aligned. As
> such, the
> > owner/operator should not have to perform further calibration or
> > alignment.
> >
> > His radio DOES suffer from some form of overshoot, so please
> don't
> > tell
> > him that it doesn't. He knows what he is seeing with his
> particular
> > radio and the cause is not something that he has or has not
> done.
> > It is
> > not his fault. It is a problem that came from the factory.
> Accept
> > it as
> > fact.
> >
> > 73, Alek
> > VK6APK
> >
> >
> >
> >
> >
> > On 16/08/2012 2:41 PM, Robert Mccormack wrote:
> > > Hi all,
> > >
> > > Message: 6
> > > Date: Wed, 15 Aug 2012 17:01:26 -0700
> > > From: "Jim W7RY" <jimw7ry at gmail.com
> <mailto:jimw7ry at gmail.com> <mailto:jimw7ry at gmail.com
> <mailto:jimw7ry at gmail.com>>>
> > > Subject: Re: [Amps] 87a will tell you, too
> > > To: <amps at contesting.com <mailto:amps at contesting.com>
> <mailto:amps at contesting.com <mailto:amps at contesting.com>>>
> > > Message-ID: <65BE1EFA07494CE1B0CE2D8ED1508E57 at JimsLaptop>
> > > Content-Type: text/plain; format=flowed; charset="utf-8";
> > > reply-type=original
> > >
> > > I can get "over shoot" or a full-power brief spike of RF
> is the
> > K3. The
> > > rig is set for, say, 40 watts output and on its first key
> down,
> > voice or CW,
> > > it jumps to 100 watts for a very brief moment and
> strangely does
> > not repeat
> > > this spike as that one
> > > key-down session continues, but repeats again after a
> > > longer stand-by period. This is a common and very well known
> > problem with
> > > the K3, but not often discussed due to the powerful love
> people
> > have for
> > > their K3 radios. The factory has acknowledeged it but has
> also
> > denied it..
> > > Facts in my shack.
> > >
> > > Charles Harpole
> > >
> > > Now I know why I don?t own a K3! This would be unacceptable!
> > >
> > > 73
> > > Jim W7RY
> > >
> > > Hi Charles and Jim,
> > >
> > > Facts in my shack:-
> > >
> > > I have two K3s in my shack plus two more brought by guest
> ops at
> > ZM1A multi-op contest station from time to time.
> > > None of those K3s have ever exhibited the 'overshoot' problem
> > described.
> > >
> > > Our amps include hb gg and gk, Drake L4B and Tokyo HP 1kw,
> Icom
> > IC-2KL.
> > >
> > > Never had any problem with "overshoot".
> > >
> > > RTFM,
> > > especially pages 49 and 50 in the K3 Owner's manual.
> > >
> > > We would never consider use of "external ALC" - it's more
> > trouble than it's worth
> > >
> > > Read Joe W4TV's post if you doubt my comments.
> > >
> > > 73,
> > > Ken, ZL1AIH (hosting ZM1A Multi-op in CW contests)
> > >
> > >
> > >
> > >
> > >
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