[Elecraft] 2.3kHz KSB2 feedback

[John, KI6WX]

The new standard version of the KSB2 filter is the same as my 2.2 kHz
design.  Elecraft measures the bandwidth to the 6 dB points, so they quote
the bandwidth as 2.3 kHz.  If you want to use my 2.5 kHz bandwidth design,
you now only have to change 4 capacitor values.
-John
 KI6WX

----- Original Message ----- 
From: "Don Wilhelm" <w3fpr at isp.com>


> Folks,
>
> I didn't know that the 2.2 (or 2.3) kHz SSB filter had become the
> 'standard', but it does get my vote.  I have long advocated the KI6WX 2.2
> kHz filter bandwidth as my choice for a great compromise between 'punch'
for
> QRP operation and good SSB fidelity.  It does offer a flatter passband
than
> the original 2.0 kHz SSB filter.  To my mind, the 2.5 kHz bandwidth is a
bit
> too wide, but many folks favor it for the increase in fidelity.
>
> I do recall there was a time when the Collins 1.8 kHz  mechanical filter
was
> considered the ultimate for communications effectiveness - at least in the
> receive part of things - my how times and values have changed!!!
>
> 73,
> Don W3FPR
>
> ----- Original Message ----- 
>
> > I recently built a KSB2 with the now standard 2.3Khz filter
configuration.
> I
> > have been recieving compliments on the TX audio quality. Some have said
> the
> > SSB audio is the best they have heard from a K2. The filter sweeps on
> > Sectrogram show less ripple and more symmetry then my previous 2.5kHz
> KSB2.
> > John K5XTX
> >