Fw: Magnetic Fields

[kd1na]

> Thanks JF
>
> I will order 2 kits as I have 2 K2s.  I know that the VCO was sensitive to
> AC hum when I placed my hand near T5 but I didn't realize it that
> sensitive. Again many thanks and 73
> Dave KD1NA
> ----- Original Message -----
> From: "Jean-François Ménard" <[hidden email]>
> To: "Dave & Jeanne Robertson" <[hidden email]>;
> <[hidden email]>
> Sent: Wednesday, October 10, 2007 10:31 AM
> Subject: RE : [Elecraft] Magnetic Fields
>
>
>> Hi,
>>
>> Elecraft already have a mod kit for this kind of
>> behavior since 2005. The part number is : K2VCOSHLDKT
>>
>> You can also take a look at the documentation provided
>> at :
>>
>> http://www.elecraft.com/manual/K2%20VCO%20sheild%20mod%20rev%20E.pdf
>>
>> Have a nice day.
>>
>> JF VA2VYZ
>>
>> --- Dave & Jeanne Robertson <[hidden email]> a
>> écrit :
>>
>>> To All,
>>>
>>> First to the good people at elecraft,
>>> congratulations on shipping the K3s.
>>>
>>> Second:
>>>
>>> This may have been presented to the forum before but
>>> I have not seen it.
>>>
>>> Be careful with exposing your K2 to strong magnetic
>>> fields, especially ones from power transformers.
>>>
>>> I just finishing restoring an old Heathkit SB220
>>> linear and in setting up the station placed the
>>> linear to the left of the K2.
>>>
>>> When I was using the linear I started to notice some
>>> strange distortion in the received audio from the K2
>>> and other stations commented on distortion on my
>>> audio.
>>>
>>> On CW all the received signals seem to have a
>>> strange AC ripple on them. It was a very small
>>> amount but still there. Stations receiving me also
>>> reported a slight amount of ripple on my signal.
>>>
>>> All this is while the linear was on but not
>>> necessarily being used (I installed a Standby switch
>>> in the SB220).
>>>
>>> With the linear powered down, everything was
>>> perfectly normal, both on received  and transmitted
>>> signals.
>>>
>>> The power transformers in the SB220 are on the
>>> linear's right side. This was the side the K2 was
>>> located near.
>>>
>>> I rearranged the station to have an antenna coupler
>>> between the K2 and the SB220 linear, a spacing of
>>> about 10 inches, and that totally solved the AC
>>> ripple problem both on transmit and receive with the
>>> linear powered up and on-line.
>>>
>>> Just thought I would pass this on to everyone.
>>>
>>> 73
>>> Dave KD1NA
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>>
>>
>>
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>

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