[Elecraft] KI6WX Crystal Filter Bandwidth Mod ?

Sun Jun 1 09:15:00 2003

Don,

Did you put in th 2.5 kc mod as you were building #3312 or did you add the
mod after building the stock radio?

73,
Tom, W6WW
K2 #3453

----- Original Message -----
From: "Don Rasmussen" <[email protected]>
To: <[email protected]>
Sent: Saturday, May 31, 2003 6:43 PM
Subject: RE: [Elecraft] KI6WX Crystal Filter Bandwidth Mod ?

> George Winship wrote:
> >Which one did you choose, the 2.2 or the 2.5 KHZ?
> Were you happy with the results?
> ============================================
> George,
>
> I chose the 2.5khz SSB bandwidth for K2 #3312 and
> would suggest that to anyone who uses the SSB mode at
> all. I was completely unhappy with the pinched audio
> during SSB operation of my first K2 (#630) at any BFO
> setting. The rig became a "CW only" option here.
>
> With the new crystals in K2 #3312 and the wider KI6WX
> bandwidth mod, I find that the BFO frequency can be
> fine tuned just as if there were a TONE control for
> receive audio on the rig. I use OP1 for midrange, OP2
> for enhanced BASS, and OP3 for enhanced TREBLE. The
> selectivity is still very good at 2.5khz (measured
> using Spectrogram) and the improvement in clarity is
> simply amazing.
>
> I find that I'm using the K2 for everything I do now,
> and recently reprogrammed my memories to reflect this.
> I use the left column for CW (fast AGC) and the middle
> column for SSB (SLO agc). 1=7.03c 4=14.03c 7=21.03c,
> 2=7.23L 5=14.23u 8=21.3u.
>
> The right column is for WARC bands 3=10.1c 6=18.07c
> 9=24.89c and the "0" memory is for my 10m ground wave
> net.
>
> The additonal fidelity on SSB, and the improvement in
> frequency stability (credited to another KI6WX mod)
> for CW have transformed what was a very strong CW
> novelty rig (K2 #630) into one of the best general
> purpose HF's I've ever owned.
>
> 73,
> de WB8YQJ/6 Don
> Carlsbad, Ca.
>
> [email protected]
> Fri May 30 22:05:05 2003
>
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> --------------------------------------------------------------------------
------
>
> I am going to do this mod when I get the new crystals
> and caps. Would
> like some feedback from those who have done it. Which
> one did you
> choose, the 2.2 or the 2.5 KHZ? Were you happy with
> the results? If by
> chance you have done both, which did you like better
> and why?
>
> Thanks in advance.
>
> 73,
>
> George, NC5G   K2-2217
>
>
>
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