[Elecraft] Spurious

[Ken Chandler]

Well I have done this yesterday ie removed / disconnected the internal  
speaker so it cannot occur again. It's a fix until Wayne es the boys  
can move up on this minor Issue.

Ken..G0ORH sn3759

Sent from my iPhone




On 22 Dec 2009, at 16:14, Phil Hystad <k7peh at comcast.net> wrote:

> One solution that I think is a worthy idea is to remove the speaker  
> from the K3
> permanently.  This should allow more room inside the K3 for future  
> little add-on
> things that Wayne and Eric might come up with.
>
> Then, a small external speaker in a nice matching enclosure could be  
> sold as a
> "kit" separately.  Not all of us would need it.  I have a nice  
> external speaker now
> that I would use on my forthcoming K3.
>
> I mean, who uses the built in speaker anyway.  If you are operating  
> portable then
> very likely (since you might be outdoors at a campsite for example)  
> you would use
> headphones anyway.
>
> phil, K7PEH
>
>
> On Dec 22, 2009, at 8:06 AM, N4CW at aol.com wrote:
>
>> I became aware of the problem last summer while in Maine. I was on  
>> 6-Meter
>> CW and K1DG/N1LI gave me a quick call and asked me to QSY to fone.  
>> So I did
>> and  he asked me what rig I was using; I told him the K3.
>> Then he told me I had sidebands. It took us a while to find the  
>> cause: I
>> was operating in "casual" mode and using the K3's internal speaker.  
>> What we
>> found out was that the problem disappeared when I turned the  
>> monitor volume
>> down  to nothing! ...but it's hard for me to send CW that way,  
>> especially
>> with a  paddle and the internal keyer... Then I found out that the  
>> problem
>> went away if  I used my headphones...so that was the workaround.
>>
>> I called Elecraft support on it and they verified that the problem  
>> exists
>> and that they're working on it. What was news to me (I should have  
>> read the
>> manual!!!) was that the CW is generated on the DSP board and that the
>> speaker  accoustically couples to the board. This is supposed to be  
>> minimized by
>> the  mounting washers on the speaker, so I disassembled the speaker  
>> on the
>> top cover  and reassembled it, being diligent to insure the washers  
>> were
>> properly located,  etc. per the assembly instructions.
>>
>> For good measure/insurance, I've used external speakers or  
>> headphones ever
>> since.
>>
>> But, you know, there are situations where operators would probably  
>> use the
>> K3's internal speaker, such as demonstrating the rig to visiting  
>> hams or at
>> Field Day, or some such thing. That might not be good publicity if a
>> returning  station or two came back and said "Shut it off...you're  
>> polluting the
>> band!",  and they were right!
>>
>> Like Wayne said, they're working on it.
>>
>> Bert, N4CW
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