[Elecraft] K2 freq calibration...

[Don Wilhelm]

Brett,

If you just purchased the KSB2, your filter is 2.4 kHz width.  If you 
want to change it to 2.6, download the manual of the SSBCAPKT from the 
Elecraft website.

73,
Don W3FPR

Brett Gazdzinski wrote:
> Don,
> I just got the K2 and ssb add on in the last 2 weeks.
> I don't think it said anything about the bandwidth other than what is in the 
> manual that came with the ksb2, 2.3 KHz.
> It sure sounds nice on receive, and it seems to sound fine in the pro3 when 
> I monitor it.
> Perhaps I just need a good microphone.
>
> What caps need to be changed to what in order to get 2.6?
>
>
>
> Brett
> N2DTS
>
>
>
>
>   
>> Brett,
>>
>> What is the width of your OP1 filter?  The initial ones were 2.1 kHz wide 
>> for best use with a QRP K2, then it was changed to 2.4 kHz for better 
>> fidelity.  A 2.6 kHz width will sound even better.  Elecraft offers a 
>> capacitor kit to allow you to change the width to either the 2.1, 2.4 or 
>> 2.6 kHz width.
>>
>> Yes, the variable filter looks a bit 'ratty' at wide widths, but if the 
>> filter passband is positioned properly (low frequency corner at 300 Hz), 
>> it provides a means of cutting out QRM while listening to SSB despite the 
>> great passband ripple.  It is never used for transmitting SSB.
>>
>> 73,
>> Don W3FPR
>>
>>     
>
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