[Elecraft] K3 key clicks

[Eric Swartz WA6HHQ - Elecraft]

Make sure his NB was off, as that will cause rx artifacts on all strong signals.

Eric

www.elecraft.com
_..._



On Dec 13, 2012, at 12:00 PM, Greg <ab7r at cablespeed.com> wrote:

> Or maybe the guest op not being familiar with the Yaezu.  Did the
> owner of the station ever mention the problem?
> 
> 
> 
> On 12/13/12, Matthew Zilmer <mzilmer at magellangps.com> wrote:
>> The K3 is the most click-free CW transmitter available on the market.
>> Better take a look at the 5000's receiver!
>> 
>> Matt Zilmer
>> Consultant - Product Management Dept.
>> Magellan Navigation / MiTAC Digital Corp.
>> Tel: (909) 394-6052
>> Cell: (909) 730-6552
>> In status quo voluntas non sufficit
>> 
>> 
>> -----Original Message-----
>> From: elecraft-bounces at mailman.qth.net
>> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of William Hein
>> Sent: Thursday, December 13, 2012 11:24 AM
>> To: elecraft at mailman.qth.net
>> Cc: Larry Gerbaz; Jerry Fleck
>> Subject: [Elecraft] K3 key clicks
>> 
>> I am currently operating barefoot at my new-ish (moved here one year ago)
>> QTH in Glade Park CO with a K3 and a Cushcraft vertical antenna.  (Much
>> nicer antennas going up in the next few weeks and more power once I get 220V
>> to the shack).
>> 
>> I have a neighbor, Jerry K0DU, who lives about 4 miles away and is an active
>> contester.  We can see each other's QTHs from our respective shacks across a
>> high elevation Colorado plateau.  Needless to say we have no trouble hearing
>> each other.
>> 
>> I have noticed that I can get within 2-kHz of Jerry when he's operating CW
>> with at full 1.5-kW output with no clicks or elevated tx noise.  I can see a
>> giant signal on the P3 but can't hear a thing once I'm 2-kHz either side.
>> This underscores how nice the K3 rx is.  I have a full set of accessory CW
>> roofing filters.
>> 
>> After the 10m test recently Jerry emailed me  "...(Jerry's guest op) came
>> across you several times on CW... heard buckshot or key clicks out of the
>> pass band of our receiver up & down the band"  This suprised since I had
>> noted during the contest how close I could operate to Jerry.  And he was
>> running his linear and I was operating barefoot.  Jerry has a FTdx5000 so I
>> don't think poor selectivity or bad rx design is the issue.  I confirmed
>> that Jerry's 5000 did not have the NB engaged during the 10m test.
>> 
>> What can I do to check my K3 for transmitted key clicks and other unwanted
>> emissions?  How to do to eliminate same once I confirm the problem?
>> Frankly, I Jerry's transmissions don't bother me reciprocity didcates than
>> my transmissions shouldn't bother him especially with an order-of-magnitude
>> different to transmitted power.
>> 
>> The Cushcraft vertical (an R8) sometimes has high SWR spikes.  Since its
>> being decommissioned soon and I've been running low power I haven't bothered
>> to trouble shoot it.  Could this be contributing to the clicks/"buckshot"?
>> 
>> I'll run some tests with Jerry after I have a plan of attack.
>> 
>> 73
>> Bill
>> 
>> -----
>> William Hein, AA7XT
>> (ex-AA4XT, NT1Y, AA6TT, KC6EDP)
>> 
>> AMSAT Life Member
>> ARRL Life Member
>> UKSMG Member
>> 
>> 1st W to OH0 QSO on 6m
>> 1st North America to Asia QSO on 60m
>> Founder of TopBand email reflector
>> 
>> Web   www.AA7XT.com
>> Tel   +1 (970) 628-5120
>> Email   Bill.AA7XT at Gmail.com
>> Loc:  DM59pa
>> Web   twitter.com/williamhein
>> AIM / iChat / iMessage   william.hein at me.com
>> Skype   williamhein
>> about.me/williamhein#
>> 
>> 
>> 
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