[Elecraft] [K3] Birdies SOLVED

Wed May 23 15:12:18 EDT 2012

Hello,

Dave AB7E wrote "take the top off the K3 and move some cables around ..."
And this is what I did, I carefully rerouted some cables and the
birdies are went away!
The cable from J85 on the subreceiver to J84 on the aux KSYN3 seemed
the problem.

Thanks for all who replied!

73 OH2GBA

2012/5/22 David Gilbert <xdavid at cis-broadband.com>:
>
>
> I don't have a P3, but I do have a K3 and it is no secret to anyone that
> it is rife with low level birdies.  I also agree with the original post
> that the 2nd receiver compounds the problem ... the 2nd receiver is very
> well shielded (the main is not) and has almost no birdies, but my own
> experiments with cable routing showed that the 2nd receiver contributes
> to coupling of signals inside the rig.  The SIG RMV menu function added
> by Elecraft totally "cured" that problem for me and I now have no
> operating complaints at all, but SIG RMV doesn't make the birdies go
> away ... it just shifts each of them out of the normal receive
> passband.  I'm not surprised that they would still show up on a wideband
> spectrum display of the main receiver.
>
> If you want to check, take the top off the K3 and move some cables
> around (the small coax ones leading to the front panel) while watching
> the P3.  If the blips change in amplitude you're watching birdies.
>
> 73,
> Dave   AB7E
>
>
>
> On 5/22/2012 11:56 AM, dmoes at nexicom.net wrote:
>> hmm  wierd         another source in our home for birdies  is the
>> front loading washer, its another badie   Its motor is some kind of DC
>> servo or VF-AC.  With the variation that you are seeing It may be
>> something with a motor. It tends to be problematic  on 80 and 40.
>> and I believe they are moving, i dont have the p3 so I cant say for
>> sure but it seems so when I see it in the puny view that EasyPal
>> offers.
>>
>>
>>
>> David Moes
>> VE3DVY
>>
>>
>>> --- Original message ---
>>> Subject: Re: [Elecraft] [K3] Birdies
>>> From: John Bekema<john.bekema at gmail.com>
>>> To:<dmoes at nexicom.net>
>>> Cc:<elecraft at mailman.qth.net>
>>> Date: Tuesday, 22/05/2012  2:30 PM
>>>
>>> I am not sure if this is related to any wifi/switching power supply
>>>
>>> Check an other picture:
>>> http://www.oh2gba.eu/10mBirdies2.png
>>>
>>> The P3 is in 'Fixed tune mode' (so when you turn the dial, the green
>>> bar will move)
>>> You see that the 'birdies' move, quickly. At 50.024 you see a CW
>>> beacon.
>>>
>>> When removing the antenna, the 'birdies' stay.
>>>
>>> John
>>>
>>> 2012/5/22<dmoes at nexicom.net>:
>>>> do you have WiFi
>>>>
>>>> my dlink router is throwing birdies big time  and its still there when
>>>> the antenna is disconnected.     havn't checked the spacing but that
>>>> seems about correct. They are most noticable on 15-10m  havn't tried
>>>> 6m.  one birdie sits right on a local 10m net frequency so when the
>>>> net's on the internet is off and router unplugged, much to the
>>>> grumbling of the rest of the family.    the band seems clean when the
>>>> router is unplugged.
>>>>
>>>>
>>>>
>>>> David Moes
>>>> VE3DVY
>>>>
>>>>
>>>>>
>>>>> --- Original message ---
>>>>> Subject: Re: [Elecraft] [K3] Birdies
>>>>> From: John Bekema<john.bekema at gmail.com>
>>>>> To: Geoffrey Mackenzie-Kennedy<lx2ao at pt.lu>
>>>>> Cc: Elecraft Discussion List<elecraft at mailman.qth.net>
>>>>> Date: Tuesday, 22/05/2012  1:54 PM
>>>>>
>>>>> Hello Geoff!
>>>>>
>>>>> I am using a linear power supply. On the lower end of the 10m band,
>>>>> the birdies are a bit less.
>>>>>
>>>>> On six meters, the birdies are stronger, for example on 50.09374 is an
>>>>> S8 birdy. But the funny thing is, when listening
>>>>> to the subreceiver to the same freq, with the same settings, the birdy
>>>>> is much less noticable. It barely moves the meter.
>>>>>
>>>>> Also when listening with one ear to the main rx and the other ear to
>>>>> the sub rx while slowly tuning, I can hear on the main
>>>>> receiver 'whooop whoop whooop' while nothing is heard on the
>>>>> subreceiver. (receivers linked)
>>>>>
>>>>> Ideas?
>>>>>
>>>>> John
>>>>>
>>>>>
>>>>> 2012/5/22 Geoffrey Mackenzie-Kennedy<lx2ao at pt.lu>:
>>>>>>
>>>>>> Hello John,
>>>>>>
>>>>>> Because I see that the birdies are spaced approximately 13.5 kHz
>>>>>> apart,
>>>>>> leads me to ask whether you are using a linear or a switching type of
>>>>>> power
>>>>>> supply.
>>>>>>
>>>>>> Second question, do you still see these birdies at the bottom edge of
>>>>>> the
>>>>>> 10m band?
>>>>>>
>>>>>> 73,
>>>>>> Geoff
>>>>>> LX2AO
>>>>>>
>>>>>>
>>>>>>
>>>>>> On May 22, 2012 at 6:30 PM, John Bekema wrote:
>>>>>>
>>>>>>
>>>>>>>
>>>>>>> Hello group!
>>>>>>>
>>>>>>> I'd like to know how many birdies (fast moving) you can normally see
>>>>>>> on
>>>>>>> your P3
>>>>>>> when the bands are quiet, or no antenna is connected.
>>>>>>>
>>>>>>> I made a screenshot of the P3, tuned on 10m, which is at the moment
>>>>>>> pretty dead.
>>>>>>>
>>>>>>> http://www.oh2gba.eu/10mBirdies.png
>>>>>>>
>>>>>>> Is this 'normal' ? I have the feeling that the birdies got worse after
>>>>>>> installing the subrx.
>>>>>>>
>>>>>>>
>>>>>>> Thank you for your comments!
>>>>>>>
>>>>>>>
>>>>>>> Kind regards,
>>>>>>>
>>>>>>> John de OH2GBA
>>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Regards,
>>>>> John Bekema
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>>>
>>> --
>>> Regards,
>>> John Bekema
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-- 
Regards,
John Bekema