[Elecraft] K3S birdies?

[Fred Jensen]

We had a sudden case of "birdies" in a K3 on 160 at W7RN.  Strangely, 
they began abruptly as you tuned up the band [around 1838 IIRC], and 
extended for *exactly* 15 KHz where they then disappeared.  Problem 
turned out to be a shield dislodged from the syn.

73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 4/11/2018 7:20 PM, Don Sayler wrote:
> Thanks Victor.
>
> I'll check that out.
>
> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Victor Rosenthal
> 4X6GP
> Sent: Tuesday, April 10, 2018 11:33 PM
> To: elecraft at mailman.qth.net
> Subject: Re: [Elecraft] K3S birdies?
>
> Make sure the internal cables with the little TNC connectors are all seated
> properly. A poor shield connection can contribute to birdies.
> Oxidation or vibration could create this condition over time.
>
> 73,
> Victor, 4X6GP
> Rehovot, Israel
> Formerly K2VCO
> http://www.qsl.net/k2vco/
>
> On 11 Apr 2018 05:47, Don Sayler wrote:
>> Hi All.
>>
>> I've been monitoring this list for a while, and have gained some
>> useful insights from the posts. And now I have a question...
>>
>> I built my K3S #11310 last July, and I added the 100 watt amp and
>> sub-receiver last December.
>>
>> A few weeks ago, I started hearing some unusual tones around 14380 KHz
>> and 7259 KHz. The tones are much louder on 14380 than on 7259. At
>> 14380, I hear a lower-pitched tone on 14279.80, and a higher pitched
>> tone 14279.85. I hear both of these with no antenna connected. On 40m,
>> the tone is quiet enough that the background noise overcomes the tone.
>> But on 20m, the tones are quite loud. I also hear the tones on the
>> sub-receiver.
>>
>> Prior to a few weeks ago, I'm certain these tones were not present. I
>> saw the thread from 2012 about moving cables around in a K3, but if
>> there was a build problem, wouldn't these sounds have appeared
>> immediately? My routers are far away from my shack, and there is no
>> new equipment in the shack.
>>
>> Any thoughts?
>>
>> Thanks.
>>
>> Don Sayler W7OXR Kirkland WA
>>
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