[K2] 160 meter module install

[bdenley]

I have assembled and installed this module and everything seems to work
fine, including the RANT.  Is it really advisable to adjust L3 and L4 again
given that the receiver has been previously calibrated and adjusted on 80
meters already (both bands share L3 and L4)?
Thanks
Brian
KB1VBF
http://home.comcast.net/~b.denley/index.html 

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[Don Wilhelm-4]

  Brian,

Yes, I would advise it, but do not simply peak for 160 meters because
some compromise may have to be made.
The way I do it is to first peak the inductors on 80 meter (already done
on your K2), then set the K2 to 1850 kHz.  Do a TUNE at 1.5 to 2 watts
and make a notation of where the L3 and L4 slugs are located before
doing any adjustment.  Now peak on 160 meters.  Look at the position of
the slug after finding the peak and set it halfway between the best 80
meter position and the 160 meter position.  I have never seen a case
where the slug ended up more than 1/4 turn away from the peak setting
for 80 meters.

73,
Don W3FPR

On 1/15/2011 10:34 PM, Brian Denley wrote:
> I have assembled and installed this module and everything seems to work
> fine, including the RANT.  Is it really advisable to adjust L3 and L4 again
> given that the receiver has been previously calibrated and adjusted on 80
> meters already (both bands share L3 and L4)?
> Thanks
> Brian
> KB1VBF
>
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[bdenley]

Thanks Don.  Will do.
Brian
KB1VBF
http://home.comcast.net/~b.denley/index.html

----- Original Message -----
From: "Don Wilhelm" <[hidden email]>
To: "Brian Denley" <[hidden email]>
Cc: "Elecraft Reflector" <[hidden email]>
Sent: Saturday, January 15, 2011 10:56 PM
Subject: Re: [Elecraft] [K2] 160 meter module install

>  Brian,
>
> Yes, I would advise it, but do not simply peak for 160 meters because some
> compromise may have to be made.
> The way I do it is to first peak the inductors on 80 meter (already done
> on your K2), then set the K2 to 1850 kHz.  Do a TUNE at 1.5 to 2 watts and
> make a notation of where the L3 and L4 slugs are located before doing any
> adjustment.  Now peak on 160 meters.  Look at the position of the slug
> after finding the peak and set it halfway between the best 80 meter
> position and the 160 meter position.  I have never seen a case where the
> slug ended up more than 1/4 turn away from the peak setting for 80 meters.
>
> 73,
> Don W3FPR
>
> On 1/15/2011 10:34 PM, Brian Denley wrote:
>> I have assembled and installed this module and everything seems to work
>> fine, including the RANT.  Is it really advisable to adjust L3 and L4
>> again
>> given that the receiver has been previously calibrated and adjusted on 80
>> meters already (both bands share L3 and L4)?
>> Thanks
>> Brian
>> KB1VBF
>>

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